Merge pull request #21183 from nextcloud/version/17.0.7/final

17.0.7

.babelrc

@@ -3,13 +3,7 @@
     [
       "@babel/preset-env",
       {
-        "modules": false,
-        "targets": {
-          "browsers": [
-            "last 2 versions",
-            "ie >= 11"
-          ]
-        }
+        "modules": false
       }
     ]
   ]

.drone.yml

@@ -27,15 +27,14 @@ kind: pipeline
 name: webpack-build
 
 steps:
-- name: submodules
-  image: docker:git
-  commands:
-    - git submodule update --init
-- name: webpack-build
+- name: build
   image: nextcloudci/node:node-4
   commands:
     - npm ci
     - npm run build
+- name: changes
+  image: nextcloudci/node:node-4
+  commands:
     - git status
     - bash -c "[[ ! \"`git status --porcelain `\" ]] || ( echo 'Uncommited changes in webpack build' && exit 1 )"
 
@@ -80,7 +79,7 @@ steps:
   commands:
     - git submodule update --init
 - name: handlebars
-  image: node:10
+  image: node
   commands:
     - npm i
     - ./build/compile-handlebars-templates.sh
@@ -397,7 +396,215 @@ trigger:
 
 ---
 kind: pipeline
-name: mysql-php7.1
+name: mariadb10.0-php7.1
+
+steps:
+- name: submodules
+  image: docker:git
+  commands:
+    - git submodule update --init
+- name: mariadb10.0-php7.1
+  image: nextcloudci/php7.1:php7.1-16
+  commands:
+    - NOCOVERAGE=true TEST_SELECTION=DB ./autotest.sh mariadb
+
+services:
+- name: cache
+  image: redis
+- name: mariadb
+  image: mariadb:10.0
+  environment:
+    MYSQL_ROOT_PASSWORD: owncloud
+    MYSQL_USER: oc_autotest
+    MYSQL_PASSWORD: owncloud
+    MYSQL_DATABASE: oc_autotest
+  tmpfs:
+    - /var/lib/mysql
+
+trigger:
+  branch:
+    - master
+    - stable*
+  event:
+    - push
+
+---
+kind: pipeline
+name: mariadb10.1-php7.1
+
+steps:
+- name: submodules
+  image: docker:git
+  commands:
+    - git submodule update --init
+- name: mariadb10.1-php7.1
+  image: nextcloudci/php7.1:php7.1-16
+  commands:
+    - NOCOVERAGE=true TEST_SELECTION=DB ./autotest.sh mariadb
+
+services:
+- name: cache
+  image: redis
+- name: mariadb
+  image: mariadb:10.1
+  environment:
+    MYSQL_ROOT_PASSWORD: owncloud
+    MYSQL_USER: oc_autotest
+    MYSQL_PASSWORD: owncloud
+    MYSQL_DATABASE: oc_autotest
+  tmpfs:
+    - /var/lib/mysql
+
+trigger:
+  branch:
+    - master
+    - stable*
+  event:
+    - pull_request
+    - push
+
+---
+kind: pipeline
+name: mariadb10.2-php7.1
+
+steps:
+- name: submodules
+  image: docker:git
+  commands:
+    - git submodule update --init
+- name: mariadb10.2-php7.1
+  image: nextcloudci/php7.1:php7.1-16
+  commands:
+    - NOCOVERAGE=true TEST_SELECTION=DB ./autotest.sh mariadb
+
+services:
+- name: cache
+  image: redis
+- name: mariadb
+  image: mariadb:10.2
+  environment:
+    MYSQL_ROOT_PASSWORD: owncloud
+    MYSQL_USER: oc_autotest
+    MYSQL_PASSWORD: owncloud
+    MYSQL_DATABASE: oc_autotest
+  tmpfs:
+    - /var/lib/mysql
+
+trigger:
+  branch:
+    - master
+    - stable*
+  event:
+    - push
+
+---
+kind: pipeline
+name: mariadb10.3-php7.1
+
+steps:
+- name: submodules
+  image: docker:git
+  commands:
+    - git submodule update --init
+- name: mariadb10.3-php7.1
+  image: nextcloudci/php7.1:php7.1-16
+  commands:
+    - NOCOVERAGE=true TEST_SELECTION=DB ./autotest.sh mariadb
+
+services:
+- name: cache
+  image: redis
+- name: mariadb
+  image: mariadb:10.3
+  environment:
+    MYSQL_ROOT_PASSWORD: owncloud
+    MYSQL_USER: oc_autotest
+    MYSQL_PASSWORD: owncloud
+    MYSQL_DATABASE: oc_autotest
+  tmpfs:
+    - /var/lib/mysql
+
+trigger:
+  branch:
+    - master
+    - stable*
+  event:
+    - push
+
+---
+kind: pipeline
+name: mariadb10.4-php7.3
+
+steps:
+- name: submodules
+  image: docker:git
+  commands:
+    - git submodule update --init
+- name: mariadb10.4-php7.3
+  image: nextcloudci/php7.3:php7.3-1
+  commands:
+    - NOCOVERAGE=true TEST_SELECTION=DB ./autotest.sh mariadb
+
+services:
+- name: cache
+  image: redis
+- name: mariadb
+  image: mariadb:10.4
+  environment:
+    MYSQL_ROOT_PASSWORD: owncloud
+    MYSQL_USER: oc_autotest
+    MYSQL_PASSWORD: owncloud
+    MYSQL_DATABASE: oc_autotest
+  tmpfs:
+    - /var/lib/mysql
+
+trigger:
+  branch:
+    - master
+    - stable*
+  event:
+    - pull_request
+    - push
+
+---
+kind: pipeline
+name: mysql8.0-php7.2
+
+steps:
+- name: submodules
+  image: docker:git
+  commands:
+    - git submodule update --init
+- name: mysql-php7.2
+  image: nextcloudci/php7.2:php7.2-12
+  commands:
+    - NOCOVERAGE=true TEST_SELECTION=DB ./autotest.sh mysql
+
+services:
+- name: cache
+  image: redis
+- name: mysql
+  image: mysql:8.0
+  command: [ "--default-authentication-plugin=mysql_native_password" ]
+  environment:
+    MYSQL_ROOT_PASSWORD: owncloud
+    MYSQL_USER: oc_autotest
+    MYSQL_PASSWORD: owncloud
+    MYSQL_DATABASE: oc_autotest
+  tmpfs:
+    - /var/lib/mysql
+
+trigger:
+  branch:
+    - master
+    - stable*
+  event:
+    - pull_request
+    - push
+
+---
+kind: pipeline
+name: mysql5.7-php7.1
 
 steps:
 - name: submodules
@@ -427,12 +634,11 @@ trigger:
     - master
     - stable*
   event:
-    - pull_request
     - push
 
 ---
 kind: pipeline
-name: mysql-php7.2
+name: mysql5.7-php7.2
 
 steps:
 - name: submodules
@@ -460,12 +666,11 @@ trigger:
     - master
     - stable*
   event:
-    - pull_request
     - push
 
 ---
 kind: pipeline
-name: mysql-php7.3
+name: mysql5.7-php7.3
 
 steps:
 - name: submodules
@@ -493,7 +698,6 @@ trigger:
     - master
     - stable*
   event:
-    - pull_request
     - push
 
 ---
@@ -562,20 +766,19 @@ trigger:
     - master
     - stable*
   event:
-    - pull_request
     - push
 
 ---
 kind: pipeline
-name: postgres9-php7.1
+name: postgres9-php7.3
 
 steps:
 - name: submodules
   image: docker:git
   commands:
     - git submodule update --init
-- name: postgres-php7.1
-  image: nextcloudci/php7.1:php7.1-16
+- name: postgres-php7.3
+  image: nextcloudci/php7.3:php7.3-1
   commands:
     - sleep 10 # gives the database enough time to initialize
     - POSTGRES=9 NOCOVERAGE=true TEST_SELECTION=DB ./autotest.sh pgsql
@@ -627,6 +830,40 @@ services:
   tmpfs:
     - /var/lib/postgresql/data
 
+trigger:
+  branch:
+    - master
+    - stable*
+  event:
+    - push
+
+---
+kind: pipeline
+name: postgres11-php7.1
+
+steps:
+- name: submodules
+  image: docker:git
+  commands:
+    - git submodule update --init
+- name: postgres-php7.1
+  image: nextcloudci/php7.1:php7.1-16
+  commands:
+    - sleep 10 # gives the database enough time to initialize
+    - POSTGRES=11 NOCOVERAGE=true TEST_SELECTION=DB ./autotest.sh pgsql
+
+services:
+- name: cache
+  image: redis
+- name: postgres-11
+  image: postgres:11
+  environment:
+    POSTGRES_USER: oc_autotest
+    POSTGRES_DB: oc_autotest_dummy
+    POSTGRES_PASSWORD: owncloud
+  tmpfs:
+    - /var/lib/postgresql/data
+
 trigger:
   branch:
     - master
@@ -668,7 +905,6 @@ trigger:
     - master
     - stable*
   event:
-    - pull_request
     - push
 
 ---
@@ -704,7 +940,6 @@ trigger:
     - master
     - stable*
   event:
-    - pull_request
     - push
 
 ---
@@ -740,7 +975,6 @@ trigger:
     - master
     - stable*
   event:
-    - pull_request
     - push
 
 ---
@@ -2207,58 +2441,3 @@ trigger:
     - pull_request
     - push
 
----
-kind: pipeline
-name: ui-regression
-
-steps:
-- name: submodules
-  image: docker:git
-  commands:
-    - git submodule update --init
-- name: ui-regression
-  image: nextcloudci/ui-regression:ui-regression-1
-  commands:
-    - cd tests/ui-regression
-    - npm install
-    - chown -R pptruser out node_modules
-    - bash -c "until curl -s http://ui-regression-php-master > /dev/null && curl -s http://ui-regression-php > /dev/null; do sleep 2; done"
-    - sudo -u pptruser node runTests.js || true
-    - echo "The result can be found at https://s3.bitgrid.net/nextcloud-ui-regression/nextcloud/server/${DRONE_PULL_REQUEST}/index.html"
-  shm_size: '1gb'
-
-services:
-- name: ui-regression-php
-  image: nextcloudci/server:server-1
-  commands:
-    - . /etc/apache2/envvars
-    - rm -fr /var/www/html
-    - mkdir /var/www/html && cp -rT . /var/www/html && chown -R www-data:www-data /var/www/html
-    - rm -fr /var/www/html/config/config.php /var/www/html/data/*
-    - apache2 -DFOREGROUND
-- name: ui-regression-php-master
-  image: nextcloudci/server:server-1
-  commands:
-    - . /etc/apache2/envvars
-    - rm -fr /var/www/html/config/config.php /var/www/html/data/*
-    - su www-data -c "cd /var/www/html/ && git checkout $DRONE_REPO_BRANCH && git pull && git submodule update"
-    - apache2 -DFOREGROUND
-- name: publish-s3
-  image: plugins/s3
-  settings:
-    endpoint: https://ci-assets.nextcloud.com
-    bucket: nextcloud-ui-regression
-    path_style: true
-    source: tests/ui-regression/out/**/*
-    strip_prefix: tests/ui-regression/out/
-    acl: public-read
-    target: ${DRONE_REPO_OWNER}/${DRONE_REPO_NAME}/${DRONE_PULL_REQUEST}
-  secrets: [ aws_access_key_id, aws_secret_access_key ]
-
-trigger:
-  branch:
-    - master
-    - stable*
-  event:
-    - pull_request
-    - push

.gitattributes

@@ -17,5 +17,7 @@
 /apps/twofactor_backupcodes/js/*.js.map binary
 /apps/updatenotification/js/updatenotification.js binary
 /apps/updatenotification/js/updatenotification.js.map binary
+/apps/workflowengine/js/*.js binary
+/apps/workflowengine/js/*.js.map binary
 
 /settings/js/vue* binary

.github/CONTRIBUTING.md

@@ -58,7 +58,7 @@ like `git config --global alias.ci 'commit -s'`. Now you can commit with
 
 In case you are not sure how to add or update the license header correctly please have a look at [contribute/HowToApplyALicense.md][applyalicense]
 
-[devmanual]: https://docs.nextcloud.org/server/13/developer_manual/
+[devmanual]: https://docs.nextcloud.com/server/latest/developer_manual/
 [dcofile]: https://github.com/nextcloud/server/blob/master/contribute/developer-certificate-of-origin
 [applyalicense]: https://github.com/nextcloud/server/blob/master/contribute/HowToApplyALicense.md
 

.github/FUNDING.yml

@@ -0,0 +1,2 @@
+# You can add one username per supported platform and one custom link
+custom: https://www.bountysource.com/teams/nextcloud

.github/stale.yml

@@ -0,0 +1,33 @@
+# We wait 1 months to check
+daysUntilStale: 30
+
+# If no answer after two weeks, we close
+daysUntilClose: 14
+
+# Only issues that requires info from the op
+onlyLabels:
+  - "needs info"
+
+# Only if issues that are not triaged
+exemptLabels:
+  - "1. to develop"
+  - "2. developing"
+  - "3. to review"
+  - "4. to release"
+  - security
+
+# Label to use when marking as stale
+staleLabel: stale
+
+# Comment to post when marking as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity and seems to be missing some essential information.
+  It will be closed if no further activity occurs. Thank you
+  for your contributions.
+
+# Limit the number of actions per hour, from 1-30. Default is 30
+limitPerRun: 30
+
+# Limit to only `issues` or `pulls`
+only: issues

.github/workflows/block-merge-eol.yml

@@ -1,30 +0,0 @@
-# This workflow is provided via the organization template repository
-#
-# https://github.com/nextcloud/.github
-# https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
-
-name: Pull request checks
-
-on: pull_request
-
-jobs:
-  block-merges-eol:
-    name: Block merges for EOL branches
-
-    # Only run on stableXX branches
-    if: startsWith( github.base_ref, 'stable')
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Download updater config
-        run: curl https://raw.githubusercontent.com/nextcloud/updater_server/production/config/config.php --output config.php
-
-      - name: Set server major version environment
-        run: |
-          # retrieve version number from branch reference
-          server_major=$(echo "${{ github.base_ref }}" | sed -En 's/stable//p')
-          echo "server_major=$server_major" >> $GITHUB_ENV
- 
-      - name: Checking if ${{ env.server_major }} is EOL
-        run: |
-          php -r 'echo json_encode(require_once "config.php");' | jq --arg version "${{ env.server_major }}" '.stable[$version]["100"].eol' | grep --silent -i 'false'

.htaccess

@@ -11,12 +11,13 @@
 
   <IfModule mod_env.c>
     # Add security and privacy related headers
-    Header set X-Content-Type-Options "nosniff"
-    Header set X-XSS-Protection "1; mode=block"
-    Header set X-Robots-Tag "none"
-    Header set X-Download-Options "noopen"
-    Header set X-Permitted-Cross-Domain-Policies "none"
-    Header set Referrer-Policy "no-referrer"
+    Header always set Referrer-Policy "no-referrer"
+    Header always set X-Content-Type-Options "nosniff"
+    Header always set X-Download-Options "noopen"
+    Header always set X-Frame-Options "SAMEORIGIN"
+    Header always set X-Permitted-Cross-Domain-Policies "none"
+    Header always set X-Robots-Tag "none"
+    Header always set X-XSS-Protection "1; mode=block"
     SetEnv modHeadersAvailable true
   </IfModule>
 
@@ -40,12 +41,13 @@
 </IfModule>
 <IfModule mod_rewrite.c>
   RewriteEngine on
-  RewriteCond %{HTTP_USER_AGENT}  DavClnt
-  RewriteRule ^$         /remote.php/webdav/          [L,R=302]
+  RewriteCond %{HTTP_USER_AGENT} DavClnt
+  RewriteRule ^$ /remote.php/webdav/ [L,R=302]
   RewriteRule .* - [env=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
   RewriteRule ^\.well-known/host-meta /public.php?service=host-meta [QSA,L]
   RewriteRule ^\.well-known/host-meta\.json /public.php?service=host-meta-json [QSA,L]
   RewriteRule ^\.well-known/webfinger /public.php?service=webfinger [QSA,L]
+  RewriteRule ^\.well-known/nodeinfo /public.php?service=nodeinfo [QSA,L]
   RewriteRule ^\.well-known/carddav /remote.php/dav/ [R=301,L]
   RewriteRule ^\.well-known/caldav /remote.php/dav/ [R=301,L]
   RewriteRule ^remote/(.*) remote.php [QSA,L]

Makefile

@@ -1,4 +1,4 @@
-all: dev-setup build-js-production
+all: clean dev-setup build-js-production
 
 dev-setup: clean-dev npm-init
 
@@ -20,3 +20,30 @@ watch-js:
 clean-dev:
 	rm -rf node_modules
 
+clean:
+	rm -rf apps/accessibility/js/
+	rm -rf apps/comments/js/
+	rm -rf apps/files_sharing/js/dist/
+	rm -rf apps/files_trashbin/js/
+	rm -rf apps/files_versions/js/
+	rm -rf apps/oauth2/js/
+	rm -rf apps/systemtags/js/systemtags.*
+	rm -rf apps/twofactor_backupcodes/js
+	rm -rf apps/updatenotification/js/updatenotification.*
+	rm -rf apps/workflowengine/js/
+	rm -rf core/js/dist
+	rm -rf settings/js/vue-*
+
+clean-git: clean
+	git checkout -- apps/accessibility/js/
+	git checkout -- apps/comments/js/
+	git checkout -- apps/files_sharing/js/dist/
+	git checkout -- apps/files_trashbin/js/
+	git checkout -- apps/files_versions/js/
+	git checkout -- apps/oauth2/js/
+	git checkout -- apps/systemtags/js/systemtags.*
+	git checkout -- apps/twofactor_backupcodes/js
+	git checkout -- apps/updatenotification/js/updatenotification.*
+	git checkout -- apps/workflowengine/js/
+	git checkout -- core/js/dist
+	git checkout -- settings/js/vue-*

README.md

@@ -26,7 +26,7 @@ You want to learn more about how you can use Nextcloud to access, share and prot
 - 📦 Buy one of the [awesome **devices** coming with a preinstalled Nextcloud](https://nextcloud.com/devices/)
 - 🏢 Find a [service **provider**](https://nextcloud.com/providers/) who hosts Nextcloud for you or your company
 
-Enterprise? Public Sector or Education user? You may want to have a look into the [**Enterprise Support Subscription**](https://nextcloud.com/enterprise/) provided by the Nextcloud GmbH.
+Enterprise? Public Sector or Education user? You may want to have a look into the [**Enterprise Subscription**](https://nextcloud.com/enterprise/) provided by Nextcloud GmbH.
 
 ## Get in touch 💬
 

apps/accessibility/appinfo/info.xml

@@ -5,7 +5,7 @@
     <name>Accessibility</name>
     <summary>Accessibility options for nextcloud</summary>
     <description><![CDATA[Provides multiple accessibilities options to ease your use of Nextcloud]]></description>
-    <version>1.2.0</version>
+    <version>1.3.0</version>
     <licence>agpl</licence>
     <author>John Molakvoæ</author>
     <namespace>Accessibility</namespace>
@@ -16,7 +16,7 @@
     <bugs>https://github.com/nextcloud/server/issues</bugs>
 
     <dependencies>
-        <nextcloud min-version="16" max-version="16"/>
+        <nextcloud min-version="17" max-version="17"/>
     </dependencies>
 
     <settings>

apps/accessibility/composer/autoload.php

@@ -0,0 +1,7 @@
+<?php
+
+// autoload.php @generated by Composer
+
+require_once __DIR__ . '/composer/autoload_real.php';
+
+return ComposerAutoloaderInitAccessibility::getLoader();

apps/accessibility/composer/composer.json

@@ -0,0 +1,13 @@
+{
+    "config" : {
+        "vendor-dir": ".",
+        "optimize-autoloader": true,
+        "classmap-authoritative": true,
+        "autoloader-suffix": "Accessibility"
+    },
+    "autoload" : {
+        "psr-4": {
+            "OCA\\Accessibility\\": "../lib/"
+        }
+    }
+}

apps/accessibility/composer/composer/ClassLoader.php

@@ -0,0 +1,445 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Autoload;
+
+/**
+ * ClassLoader implements a PSR-0, PSR-4 and classmap class loader.
+ *
+ *     $loader = new \Composer\Autoload\ClassLoader();
+ *
+ *     // register classes with namespaces
+ *     $loader->add('Symfony\Component', __DIR__.'/component');
+ *     $loader->add('Symfony',           __DIR__.'/framework');
+ *
+ *     // activate the autoloader
+ *     $loader->register();
+ *
+ *     // to enable searching the include path (eg. for PEAR packages)
+ *     $loader->setUseIncludePath(true);
+ *
+ * In this example, if you try to use a class in the Symfony\Component
+ * namespace or one of its children (Symfony\Component\Console for instance),
+ * the autoloader will first look for the class under the component/
+ * directory, and it will then fallback to the framework/ directory if not
+ * found before giving up.
+ *
+ * This class is loosely based on the Symfony UniversalClassLoader.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ * @see    http://www.php-fig.org/psr/psr-0/
+ * @see    http://www.php-fig.org/psr/psr-4/
+ */
+class ClassLoader
+{
+    // PSR-4
+    private $prefixLengthsPsr4 = array();
+    private $prefixDirsPsr4 = array();
+    private $fallbackDirsPsr4 = array();
+
+    // PSR-0
+    private $prefixesPsr0 = array();
+    private $fallbackDirsPsr0 = array();
+
+    private $useIncludePath = false;
+    private $classMap = array();
+    private $classMapAuthoritative = false;
+    private $missingClasses = array();
+    private $apcuPrefix;
+
+    public function getPrefixes()
+    {
+        if (!empty($this->prefixesPsr0)) {
+            return call_user_func_array('array_merge', $this->prefixesPsr0);
+        }
+
+        return array();
+    }
+
+    public function getPrefixesPsr4()
+    {
+        return $this->prefixDirsPsr4;
+    }
+
+    public function getFallbackDirs()
+    {
+        return $this->fallbackDirsPsr0;
+    }
+
+    public function getFallbackDirsPsr4()
+    {
+        return $this->fallbackDirsPsr4;
+    }
+
+    public function getClassMap()
+    {
+        return $this->classMap;
+    }
+
+    /**
+     * @param array $classMap Class to filename map
+     */
+    public function addClassMap(array $classMap)
+    {
+        if ($this->classMap) {
+            $this->classMap = array_merge($this->classMap, $classMap);
+        } else {
+            $this->classMap = $classMap;
+        }
+    }
+
+    /**
+     * Registers a set of PSR-0 directories for a given prefix, either
+     * appending or prepending to the ones previously set for this prefix.
+     *
+     * @param string       $prefix  The prefix
+     * @param array|string $paths   The PSR-0 root directories
+     * @param bool         $prepend Whether to prepend the directories
+     */
+    public function add($prefix, $paths, $prepend = false)
+    {
+        if (!$prefix) {
+            if ($prepend) {
+                $this->fallbackDirsPsr0 = array_merge(
+                    (array) $paths,
+                    $this->fallbackDirsPsr0
+                );
+            } else {
+                $this->fallbackDirsPsr0 = array_merge(
+                    $this->fallbackDirsPsr0,
+                    (array) $paths
+                );
+            }
+
+            return;
+        }
+
+        $first = $prefix[0];
+        if (!isset($this->prefixesPsr0[$first][$prefix])) {
+            $this->prefixesPsr0[$first][$prefix] = (array) $paths;
+
+            return;
+        }
+        if ($prepend) {
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
+                (array) $paths,
+                $this->prefixesPsr0[$first][$prefix]
+            );
+        } else {
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
+                $this->prefixesPsr0[$first][$prefix],
+                (array) $paths
+            );
+        }
+    }
+
+    /**
+     * Registers a set of PSR-4 directories for a given namespace, either
+     * appending or prepending to the ones previously set for this namespace.
+     *
+     * @param string       $prefix  The prefix/namespace, with trailing '\\'
+     * @param array|string $paths   The PSR-4 base directories
+     * @param bool         $prepend Whether to prepend the directories
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function addPsr4($prefix, $paths, $prepend = false)
+    {
+        if (!$prefix) {
+            // Register directories for the root namespace.
+            if ($prepend) {
+                $this->fallbackDirsPsr4 = array_merge(
+                    (array) $paths,
+                    $this->fallbackDirsPsr4
+                );
+            } else {
+                $this->fallbackDirsPsr4 = array_merge(
+                    $this->fallbackDirsPsr4,
+                    (array) $paths
+                );
+            }
+        } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
+            // Register directories for a new namespace.
+            $length = strlen($prefix);
+            if ('\\' !== $prefix[$length - 1]) {
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
+            }
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->prefixDirsPsr4[$prefix] = (array) $paths;
+        } elseif ($prepend) {
+            // Prepend directories for an already registered namespace.
+            $this->prefixDirsPsr4[$prefix] = array_merge(
+                (array) $paths,
+                $this->prefixDirsPsr4[$prefix]
+            );
+        } else {
+            // Append directories for an already registered namespace.
+            $this->prefixDirsPsr4[$prefix] = array_merge(
+                $this->prefixDirsPsr4[$prefix],
+                (array) $paths
+            );
+        }
+    }
+
+    /**
+     * Registers a set of PSR-0 directories for a given prefix,
+     * replacing any others previously set for this prefix.
+     *
+     * @param string       $prefix The prefix
+     * @param array|string $paths  The PSR-0 base directories
+     */
+    public function set($prefix, $paths)
+    {
+        if (!$prefix) {
+            $this->fallbackDirsPsr0 = (array) $paths;
+        } else {
+            $this->prefixesPsr0[$prefix[0]][$prefix] = (array) $paths;
+        }
+    }
+
+    /**
+     * Registers a set of PSR-4 directories for a given namespace,
+     * replacing any others previously set for this namespace.
+     *
+     * @param string       $prefix The prefix/namespace, with trailing '\\'
+     * @param array|string $paths  The PSR-4 base directories
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function setPsr4($prefix, $paths)
+    {
+        if (!$prefix) {
+            $this->fallbackDirsPsr4 = (array) $paths;
+        } else {
+            $length = strlen($prefix);
+            if ('\\' !== $prefix[$length - 1]) {
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
+            }
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->prefixDirsPsr4[$prefix] = (array) $paths;
+        }
+    }
+
+    /**
+     * Turns on searching the include path for class files.
+     *
+     * @param bool $useIncludePath
+     */
+    public function setUseIncludePath($useIncludePath)
+    {
+        $this->useIncludePath = $useIncludePath;
+    }
+
+    /**
+     * Can be used to check if the autoloader uses the include path to check
+     * for classes.
+     *
+     * @return bool
+     */
+    public function getUseIncludePath()
+    {
+        return $this->useIncludePath;
+    }
+
+    /**
+     * Turns off searching the prefix and fallback directories for classes
+     * that have not been registered with the class map.
+     *
+     * @param bool $classMapAuthoritative
+     */
+    public function setClassMapAuthoritative($classMapAuthoritative)
+    {
+        $this->classMapAuthoritative = $classMapAuthoritative;
+    }
+
+    /**
+     * Should class lookup fail if not found in the current class map?
+     *
+     * @return bool
+     */
+    public function isClassMapAuthoritative()
+    {
+        return $this->classMapAuthoritative;
+    }
+
+    /**
+     * APCu prefix to use to cache found/not-found classes, if the extension is enabled.
+     *
+     * @param string|null $apcuPrefix
+     */
+    public function setApcuPrefix($apcuPrefix)
+    {
+        $this->apcuPrefix = function_exists('apcu_fetch') && filter_var(ini_get('apc.enabled'), FILTER_VALIDATE_BOOLEAN) ? $apcuPrefix : null;
+    }
+
+    /**
+     * The APCu prefix in use, or null if APCu caching is not enabled.
+     *
+     * @return string|null
+     */
+    public function getApcuPrefix()
+    {
+        return $this->apcuPrefix;
+    }
+
+    /**
+     * Registers this instance as an autoloader.
+     *
+     * @param bool $prepend Whether to prepend the autoloader or not
+     */
+    public function register($prepend = false)
+    {
+        spl_autoload_register(array($this, 'loadClass'), true, $prepend);
+    }
+
+    /**
+     * Unregisters this instance as an autoloader.
+     */
+    public function unregister()
+    {
+        spl_autoload_unregister(array($this, 'loadClass'));
+    }
+
+    /**
+     * Loads the given class or interface.
+     *
+     * @param  string    $class The name of the class
+     * @return bool|null True if loaded, null otherwise
+     */
+    public function loadClass($class)
+    {
+        if ($file = $this->findFile($class)) {
+            includeFile($file);
+
+            return true;
+        }
+    }
+
+    /**
+     * Finds the path to the file where the class is defined.
+     *
+     * @param string $class The name of the class
+     *
+     * @return string|false The path if found, false otherwise
+     */
+    public function findFile($class)
+    {
+        // class map lookup
+        if (isset($this->classMap[$class])) {
+            return $this->classMap[$class];
+        }
+        if ($this->classMapAuthoritative || isset($this->missingClasses[$class])) {
+            return false;
+        }
+        if (null !== $this->apcuPrefix) {
+            $file = apcu_fetch($this->apcuPrefix.$class, $hit);
+            if ($hit) {
+                return $file;
+            }
+        }
+
+        $file = $this->findFileWithExtension($class, '.php');
+
+        // Search for Hack files if we are running on HHVM
+        if (false === $file && defined('HHVM_VERSION')) {
+            $file = $this->findFileWithExtension($class, '.hh');
+        }
+
+        if (null !== $this->apcuPrefix) {
+            apcu_add($this->apcuPrefix.$class, $file);
+        }
+
+        if (false === $file) {
+            // Remember that this class does not exist.
+            $this->missingClasses[$class] = true;
+        }
+
+        return $file;
+    }
+
+    private function findFileWithExtension($class, $ext)
+    {
+        // PSR-4 lookup
+        $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
+
+        $first = $class[0];
+        if (isset($this->prefixLengthsPsr4[$first])) {
+            $subPath = $class;
+            while (false !== $lastPos = strrpos($subPath, '\\')) {
+                $subPath = substr($subPath, 0, $lastPos);
+                $search = $subPath . '\\';
+                if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
+                    foreach ($this->prefixDirsPsr4[$search] as $dir) {
+                        if (file_exists($file = $dir . $pathEnd)) {
+                            return $file;
+                        }
+                    }
+                }
+            }
+        }
+
+        // PSR-4 fallback dirs
+        foreach ($this->fallbackDirsPsr4 as $dir) {
+            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) {
+                return $file;
+            }
+        }
+
+        // PSR-0 lookup
+        if (false !== $pos = strrpos($class, '\\')) {
+            // namespaced class name
+            $logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1)
+                . strtr(substr($logicalPathPsr4, $pos + 1), '_', DIRECTORY_SEPARATOR);
+        } else {
+            // PEAR-like class name
+            $logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext;
+        }
+
+        if (isset($this->prefixesPsr0[$first])) {
+            foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) {
+                if (0 === strpos($class, $prefix)) {
+                    foreach ($dirs as $dir) {
+                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                            return $file;
+                        }
+                    }
+                }
+            }
+        }
+
+        // PSR-0 fallback dirs
+        foreach ($this->fallbackDirsPsr0 as $dir) {
+            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                return $file;
+            }
+        }
+
+        // PSR-0 include paths.
+        if ($this->useIncludePath && $file = stream_resolve_include_path($logicalPathPsr0)) {
+            return $file;
+        }
+
+        return false;
+    }
+}
+
+/**
+ * Scope isolated include.
+ *
+ * Prevents access to $this/self from included files.
+ */
+function includeFile($file)
+{
+    include $file;
+}

apps/accessibility/composer/composer/LICENSE

@@ -0,0 +1,21 @@
+
+Copyright (c) Nils Adermann, Jordi Boggiano
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+

apps/accessibility/composer/composer/autoload_classmap.php

@@ -0,0 +1,15 @@
+<?php
+
+// autoload_classmap.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = $vendorDir;
+
+return array(
+    'OCA\\Accessibility\\AccessibilityProvider' => $baseDir . '/../lib/AccessibilityProvider.php',
+    'OCA\\Accessibility\\AppInfo\\Application' => $baseDir . '/../lib/AppInfo/Application.php',
+    'OCA\\Accessibility\\Controller\\AccessibilityController' => $baseDir . '/../lib/Controller/AccessibilityController.php',
+    'OCA\\Accessibility\\Controller\\ConfigController' => $baseDir . '/../lib/Controller/ConfigController.php',
+    'OCA\\Accessibility\\Settings\\Personal' => $baseDir . '/../lib/Settings/Personal.php',
+    'OCA\\Accessibility\\Settings\\PersonalSection' => $baseDir . '/../lib/Settings/PersonalSection.php',
+);

apps/accessibility/composer/composer/autoload_namespaces.php

@@ -0,0 +1,9 @@
+<?php
+
+// autoload_namespaces.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = $vendorDir;
+
+return array(
+);

apps/accessibility/composer/composer/autoload_psr4.php

@@ -0,0 +1,10 @@
+<?php
+
+// autoload_psr4.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = $vendorDir;
+
+return array(
+    'OCA\\Accessibility\\' => array($baseDir . '/../lib'),
+);

apps/accessibility/composer/composer/autoload_real.php

@@ -0,0 +1,43 @@
+<?php
+
+// autoload_real.php @generated by Composer
+
+class ComposerAutoloaderInitAccessibility
+{
+    private static $loader;
+
+    public static function loadClassLoader($class)
+    {
+        if ('Composer\Autoload\ClassLoader' === $class) {
+            require __DIR__ . '/ClassLoader.php';
+        }
+    }
+
+    public static function getLoader()
+    {
+        if (null !== self::$loader) {
+            return self::$loader;
+        }
+
+        spl_autoload_register(array('ComposerAutoloaderInitAccessibility', 'loadClassLoader'), true, true);
+        self::$loader = $loader = new \Composer\Autoload\ClassLoader();
+        spl_autoload_unregister(array('ComposerAutoloaderInitAccessibility', 'loadClassLoader'));
+
+        $useStaticLoader = PHP_VERSION_ID >= 50600 && !defined('HHVM_VERSION') && (!function_exists('zend_loader_file_encoded') || !zend_loader_file_encoded());
+        if ($useStaticLoader) {
+            require_once __DIR__ . '/autoload_static.php';
+
+            call_user_func(\Composer\Autoload\ComposerStaticInitAccessibility::getInitializer($loader));
+        } else {
+            $classMap = require __DIR__ . '/autoload_classmap.php';
+            if ($classMap) {
+                $loader->addClassMap($classMap);
+            }
+        }
+
+        $loader->setClassMapAuthoritative(true);
+        $loader->register(true);
+
+        return $loader;
+    }
+}

apps/accessibility/composer/composer/autoload_static.php

@@ -0,0 +1,41 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInitAccessibility
+{
+    public static $prefixLengthsPsr4 = array (
+        'O' => 
+        array (
+            'OCA\\Accessibility\\' => 18,
+        ),
+    );
+
+    public static $prefixDirsPsr4 = array (
+        'OCA\\Accessibility\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/../lib',
+        ),
+    );
+
+    public static $classMap = array (
+        'OCA\\Accessibility\\AccessibilityProvider' => __DIR__ . '/..' . '/../lib/AccessibilityProvider.php',
+        'OCA\\Accessibility\\AppInfo\\Application' => __DIR__ . '/..' . '/../lib/AppInfo/Application.php',
+        'OCA\\Accessibility\\Controller\\AccessibilityController' => __DIR__ . '/..' . '/../lib/Controller/AccessibilityController.php',
+        'OCA\\Accessibility\\Controller\\ConfigController' => __DIR__ . '/..' . '/../lib/Controller/ConfigController.php',
+        'OCA\\Accessibility\\Settings\\Personal' => __DIR__ . '/..' . '/../lib/Settings/Personal.php',
+        'OCA\\Accessibility\\Settings\\PersonalSection' => __DIR__ . '/..' . '/../lib/Settings/PersonalSection.php',
+    );
+
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+            $loader->prefixLengthsPsr4 = ComposerStaticInitAccessibility::$prefixLengthsPsr4;
+            $loader->prefixDirsPsr4 = ComposerStaticInitAccessibility::$prefixDirsPsr4;
+            $loader->classMap = ComposerStaticInitAccessibility::$classMap;
+
+        }, null, ClassLoader::class);
+    }
+}

apps/accessibility/css/fontdyslexic.scss

@@ -1,22 +1,15 @@
 @font-face {
 	font-family: 'OpenDyslexic';
 	font-style: normal;
-	font-weight: 300;
+	font-weight: 400;
 	src: url('../fonts/OpenDyslexic-Regular.woff') format('woff');
 }
 
 @font-face {
 	font-family: 'OpenDyslexic';
 	font-style: normal;
-	font-weight: normal;
-	src: url('../fonts/OpenDyslexic-Regular.woff') format('woff');
-}
-
-@font-face {
-	font-family: 'OpenDyslexic';
-	font-style: normal;
-	font-weight: 600;
+	font-weight: 700;
 	src: url('../fonts/OpenDyslexic-Bold.woff') format('woff');
 }
 
-$font-face: OpenDyslexic, 'Nunito', 'Open Sans', Frutiger, Calibri, 'Myriad Pro', Myriad, sans-serif;
+$font-face: OpenDyslexic, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';

apps/accessibility/lib/AccessibilityProvider.php

@@ -63,7 +63,7 @@ class AccessibilityProvider {
 			], [
 				'id'    => 'themedark',
 				'img'   => $this->urlGenerator->imagePath($this->appName, 'theme-dark.jpg'),
-				'title' => $this->l->t('Dark theme (beta)'),
+				'title' => $this->l->t('Dark theme'),
 				'text'  => $this->l->t('A dark theme to ease your eyes by reducing the overall luminosity and brightness. It is still under development, so please report any issues you may find.')
 			]
 		);

apps/accessibility/src/App.vue

@@ -17,7 +17,7 @@
 
 <script>
 import preview from './components/itemPreview';
-import axios from 'nextcloud-axios';
+import axios from '@nextcloud/axios';
 
 export default {
 	name: 'Accessibility',

apps/accessibility/webpack.js

@@ -1,5 +1,4 @@
-const path = require('path');
-const { VueLoaderPlugin } = require('vue-loader');
+const path = require('path')
 
 module.exports = {
 	entry: path.join(__dirname, 'src', 'main.js'),
@@ -7,22 +6,5 @@ module.exports = {
 		path: path.resolve(__dirname, './js'),
 		publicPath: '/js/',
 		filename: 'accessibility.js'
-	},
-	module: {
-		rules: [
-			{
-				test: /\.vue$/,
-				loader: 'vue-loader'
-			},
-			{
-				test: /\.js$/,
-				loader: 'babel-loader',
-				exclude: /node_modules/
-			}
-		]
-	},
-	plugins: [new VueLoaderPlugin()],
-	resolve: {
-		extensions: ['*', '.js', '.vue', '.json']
 	}
-};
+}

apps/admin_audit/appinfo/info.xml

@@ -5,7 +5,7 @@
 	<name>Auditing / Logging</name>
 	<summary>Provides logging abilities for Nextcloud such as logging file accesses or otherwise sensitive actions.</summary>
 	<description>Provides logging abilities for Nextcloud such as logging file accesses or otherwise sensitive actions.</description>
-	<version>1.6.0</version>
+	<version>1.7.0</version>
 	<licence>agpl</licence>
 	<author>Nextcloud</author>
 	<namespace>AdminAudit</namespace>
@@ -15,7 +15,7 @@
 	<category>monitoring</category>
 	<bugs>https://github.com/nextcloud/server/issues</bugs>
 	<dependencies>
-		<nextcloud min-version="16" max-version="16"/>
+		<nextcloud min-version="17" max-version="17"/>
 	</dependencies>
 	<background-jobs>
 		<job>OCA\AdminAudit\BackgroundJobs\Rotate</job>

apps/cloud_federation_api/appinfo/info.xml

@@ -5,7 +5,7 @@
     <name>Cloud Federation API</name>
     <summary>Enable clouds to communicate with each other and exchange data</summary>
     <description>The Cloud Federation API enables various Nextcloud instances to communicate with each other and to exchange data.</description>
-    <version>0.2.0</version>
+    <version>1.0.0</version>
     <licence>agpl</licence>
     <author>Bjoern Schiessle</author>
     <namespace>CloudFederationAPI</namespace>
@@ -15,6 +15,6 @@
     <category>files</category>
     <bugs>https://github.com/nextcloud/cloud_federation/issues</bugs>
     <dependencies>
-        <nextcloud min-version="16" max-version="16"/>
+        <nextcloud min-version="17" max-version="17"/>
     </dependencies>
 </info>

apps/cloud_federation_api/composer/autoload.php

@@ -0,0 +1,7 @@
+<?php
+
+// autoload.php @generated by Composer
+
+require_once __DIR__ . '/composer/autoload_real.php';
+
+return ComposerAutoloaderInitCloudFederationAPI::getLoader();

apps/cloud_federation_api/composer/composer.json

@@ -0,0 +1,13 @@
+{
+    "config" : {
+        "vendor-dir": ".",
+        "optimize-autoloader": true,
+        "classmap-authoritative": true,
+        "autoloader-suffix": "CloudFederationAPI"
+    },
+    "autoload" : {
+        "psr-4": {
+            "OCA\\CloudFederationAPI\\": "../lib/"
+        }
+    }
+}

apps/cloud_federation_api/composer/composer/ClassLoader.php

@@ -0,0 +1,445 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Autoload;
+
+/**
+ * ClassLoader implements a PSR-0, PSR-4 and classmap class loader.
+ *
+ *     $loader = new \Composer\Autoload\ClassLoader();
+ *
+ *     // register classes with namespaces
+ *     $loader->add('Symfony\Component', __DIR__.'/component');
+ *     $loader->add('Symfony',           __DIR__.'/framework');
+ *
+ *     // activate the autoloader
+ *     $loader->register();
+ *
+ *     // to enable searching the include path (eg. for PEAR packages)
+ *     $loader->setUseIncludePath(true);
+ *
+ * In this example, if you try to use a class in the Symfony\Component
+ * namespace or one of its children (Symfony\Component\Console for instance),
+ * the autoloader will first look for the class under the component/
+ * directory, and it will then fallback to the framework/ directory if not
+ * found before giving up.
+ *
+ * This class is loosely based on the Symfony UniversalClassLoader.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ * @see    http://www.php-fig.org/psr/psr-0/
+ * @see    http://www.php-fig.org/psr/psr-4/
+ */
+class ClassLoader
+{
+    // PSR-4
+    private $prefixLengthsPsr4 = array();
+    private $prefixDirsPsr4 = array();
+    private $fallbackDirsPsr4 = array();
+
+    // PSR-0
+    private $prefixesPsr0 = array();
+    private $fallbackDirsPsr0 = array();
+
+    private $useIncludePath = false;
+    private $classMap = array();
+    private $classMapAuthoritative = false;
+    private $missingClasses = array();
+    private $apcuPrefix;
+
+    public function getPrefixes()
+    {
+        if (!empty($this->prefixesPsr0)) {
+            return call_user_func_array('array_merge', $this->prefixesPsr0);
+        }
+
+        return array();
+    }
+
+    public function getPrefixesPsr4()
+    {
+        return $this->prefixDirsPsr4;
+    }
+
+    public function getFallbackDirs()
+    {
+        return $this->fallbackDirsPsr0;
+    }
+
+    public function getFallbackDirsPsr4()
+    {
+        return $this->fallbackDirsPsr4;
+    }
+
+    public function getClassMap()
+    {
+        return $this->classMap;
+    }
+
+    /**
+     * @param array $classMap Class to filename map
+     */
+    public function addClassMap(array $classMap)
+    {
+        if ($this->classMap) {
+            $this->classMap = array_merge($this->classMap, $classMap);
+        } else {
+            $this->classMap = $classMap;
+        }
+    }
+
+    /**
+     * Registers a set of PSR-0 directories for a given prefix, either
+     * appending or prepending to the ones previously set for this prefix.
+     *
+     * @param string       $prefix  The prefix
+     * @param array|string $paths   The PSR-0 root directories
+     * @param bool         $prepend Whether to prepend the directories
+     */
+    public function add($prefix, $paths, $prepend = false)
+    {
+        if (!$prefix) {
+            if ($prepend) {
+                $this->fallbackDirsPsr0 = array_merge(
+                    (array) $paths,
+                    $this->fallbackDirsPsr0
+                );
+            } else {
+                $this->fallbackDirsPsr0 = array_merge(
+                    $this->fallbackDirsPsr0,
+                    (array) $paths
+                );
+            }
+
+            return;
+        }
+
+        $first = $prefix[0];
+        if (!isset($this->prefixesPsr0[$first][$prefix])) {
+            $this->prefixesPsr0[$first][$prefix] = (array) $paths;
+
+            return;
+        }
+        if ($prepend) {
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
+                (array) $paths,
+                $this->prefixesPsr0[$first][$prefix]
+            );
+        } else {
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
+                $this->prefixesPsr0[$first][$prefix],
+                (array) $paths
+            );
+        }
+    }
+
+    /**
+     * Registers a set of PSR-4 directories for a given namespace, either
+     * appending or prepending to the ones previously set for this namespace.
+     *
+     * @param string       $prefix  The prefix/namespace, with trailing '\\'
+     * @param array|string $paths   The PSR-4 base directories
+     * @param bool         $prepend Whether to prepend the directories
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function addPsr4($prefix, $paths, $prepend = false)
+    {
+        if (!$prefix) {
+            // Register directories for the root namespace.
+            if ($prepend) {
+                $this->fallbackDirsPsr4 = array_merge(
+                    (array) $paths,
+                    $this->fallbackDirsPsr4
+                );
+            } else {
+                $this->fallbackDirsPsr4 = array_merge(
+                    $this->fallbackDirsPsr4,
+                    (array) $paths
+                );
+            }
+        } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
+            // Register directories for a new namespace.
+            $length = strlen($prefix);
+            if ('\\' !== $prefix[$length - 1]) {
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
+            }
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->prefixDirsPsr4[$prefix] = (array) $paths;
+        } elseif ($prepend) {
+            // Prepend directories for an already registered namespace.
+            $this->prefixDirsPsr4[$prefix] = array_merge(
+                (array) $paths,
+                $this->prefixDirsPsr4[$prefix]
+            );
+        } else {
+            // Append directories for an already registered namespace.
+            $this->prefixDirsPsr4[$prefix] = array_merge(
+                $this->prefixDirsPsr4[$prefix],
+                (array) $paths
+            );
+        }
+    }
+
+    /**
+     * Registers a set of PSR-0 directories for a given prefix,
+     * replacing any others previously set for this prefix.
+     *
+     * @param string       $prefix The prefix
+     * @param array|string $paths  The PSR-0 base directories
+     */
+    public function set($prefix, $paths)
+    {
+        if (!$prefix) {
+            $this->fallbackDirsPsr0 = (array) $paths;
+        } else {
+            $this->prefixesPsr0[$prefix[0]][$prefix] = (array) $paths;
+        }
+    }
+
+    /**
+     * Registers a set of PSR-4 directories for a given namespace,
+     * replacing any others previously set for this namespace.
+     *
+     * @param string       $prefix The prefix/namespace, with trailing '\\'
+     * @param array|string $paths  The PSR-4 base directories
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function setPsr4($prefix, $paths)
+    {
+        if (!$prefix) {
+            $this->fallbackDirsPsr4 = (array) $paths;
+        } else {
+            $length = strlen($prefix);
+            if ('\\' !== $prefix[$length - 1]) {
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
+            }
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->prefixDirsPsr4[$prefix] = (array) $paths;
+        }
+    }
+
+    /**
+     * Turns on searching the include path for class files.
+     *
+     * @param bool $useIncludePath
+     */
+    public function setUseIncludePath($useIncludePath)
+    {
+        $this->useIncludePath = $useIncludePath;
+    }
+
+    /**
+     * Can be used to check if the autoloader uses the include path to check
+     * for classes.
+     *
+     * @return bool
+     */
+    public function getUseIncludePath()
+    {
+        return $this->useIncludePath;
+    }
+
+    /**
+     * Turns off searching the prefix and fallback directories for classes
+     * that have not been registered with the class map.
+     *
+     * @param bool $classMapAuthoritative
+     */
+    public function setClassMapAuthoritative($classMapAuthoritative)
+    {
+        $this->classMapAuthoritative = $classMapAuthoritative;
+    }
+
+    /**
+     * Should class lookup fail if not found in the current class map?
+     *
+     * @return bool
+     */
+    public function isClassMapAuthoritative()
+    {
+        return $this->classMapAuthoritative;
+    }
+
+    /**
+     * APCu prefix to use to cache found/not-found classes, if the extension is enabled.
+     *
+     * @param string|null $apcuPrefix
+     */
+    public function setApcuPrefix($apcuPrefix)
+    {
+        $this->apcuPrefix = function_exists('apcu_fetch') && filter_var(ini_get('apc.enabled'), FILTER_VALIDATE_BOOLEAN) ? $apcuPrefix : null;
+    }
+
+    /**
+     * The APCu prefix in use, or null if APCu caching is not enabled.
+     *
+     * @return string|null
+     */
+    public function getApcuPrefix()
+    {
+        return $this->apcuPrefix;
+    }
+
+    /**
+     * Registers this instance as an autoloader.
+     *
+     * @param bool $prepend Whether to prepend the autoloader or not
+     */
+    public function register($prepend = false)
+    {
+        spl_autoload_register(array($this, 'loadClass'), true, $prepend);
+    }
+
+    /**
+     * Unregisters this instance as an autoloader.
+     */
+    public function unregister()
+    {
+        spl_autoload_unregister(array($this, 'loadClass'));
+    }
+
+    /**
+     * Loads the given class or interface.
+     *
+     * @param  string    $class The name of the class
+     * @return bool|null True if loaded, null otherwise
+     */
+    public function loadClass($class)
+    {
+        if ($file = $this->findFile($class)) {
+            includeFile($file);
+
+            return true;
+        }
+    }
+
+    /**
+     * Finds the path to the file where the class is defined.
+     *
+     * @param string $class The name of the class
+     *
+     * @return string|false The path if found, false otherwise
+     */
+    public function findFile($class)
+    {
+        // class map lookup
+        if (isset($this->classMap[$class])) {
+            return $this->classMap[$class];
+        }
+        if ($this->classMapAuthoritative || isset($this->missingClasses[$class])) {
+            return false;
+        }
+        if (null !== $this->apcuPrefix) {
+            $file = apcu_fetch($this->apcuPrefix.$class, $hit);
+            if ($hit) {
+                return $file;
+            }
+        }
+
+        $file = $this->findFileWithExtension($class, '.php');
+
+        // Search for Hack files if we are running on HHVM
+        if (false === $file && defined('HHVM_VERSION')) {
+            $file = $this->findFileWithExtension($class, '.hh');
+        }
+
+        if (null !== $this->apcuPrefix) {
+            apcu_add($this->apcuPrefix.$class, $file);
+        }
+
+        if (false === $file) {
+            // Remember that this class does not exist.
+            $this->missingClasses[$class] = true;
+        }
+
+        return $file;
+    }
+
+    private function findFileWithExtension($class, $ext)
+    {
+        // PSR-4 lookup
+        $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
+
+        $first = $class[0];
+        if (isset($this->prefixLengthsPsr4[$first])) {
+            $subPath = $class;
+            while (false !== $lastPos = strrpos($subPath, '\\')) {
+                $subPath = substr($subPath, 0, $lastPos);
+                $search = $subPath . '\\';
+                if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
+                    foreach ($this->prefixDirsPsr4[$search] as $dir) {
+                        if (file_exists($file = $dir . $pathEnd)) {
+                            return $file;
+                        }
+                    }
+                }
+            }
+        }
+
+        // PSR-4 fallback dirs
+        foreach ($this->fallbackDirsPsr4 as $dir) {
+            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) {
+                return $file;
+            }
+        }
+
+        // PSR-0 lookup
+        if (false !== $pos = strrpos($class, '\\')) {
+            // namespaced class name
+            $logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1)
+                . strtr(substr($logicalPathPsr4, $pos + 1), '_', DIRECTORY_SEPARATOR);
+        } else {
+            // PEAR-like class name
+            $logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext;
+        }
+
+        if (isset($this->prefixesPsr0[$first])) {
+            foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) {
+                if (0 === strpos($class, $prefix)) {
+                    foreach ($dirs as $dir) {
+                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                            return $file;
+                        }
+                    }
+                }
+            }
+        }
+
+        // PSR-0 fallback dirs
+        foreach ($this->fallbackDirsPsr0 as $dir) {
+            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                return $file;
+            }
+        }
+
+        // PSR-0 include paths.
+        if ($this->useIncludePath && $file = stream_resolve_include_path($logicalPathPsr0)) {
+            return $file;
+        }
+
+        return false;
+    }
+}
+
+/**
+ * Scope isolated include.
+ *
+ * Prevents access to $this/self from included files.
+ */
+function includeFile($file)
+{
+    include $file;
+}

apps/cloud_federation_api/composer/composer/LICENSE

@@ -0,0 +1,21 @@
+
+Copyright (c) Nils Adermann, Jordi Boggiano
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+

apps/cloud_federation_api/composer/composer/autoload_classmap.php

@@ -0,0 +1,13 @@
+<?php
+
+// autoload_classmap.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = $vendorDir;
+
+return array(
+    'OCA\\CloudFederationAPI\\AppInfo\\Application' => $baseDir . '/../lib/AppInfo/Application.php',
+    'OCA\\CloudFederationAPI\\Capabilities' => $baseDir . '/../lib/Capabilities.php',
+    'OCA\\CloudFederationAPI\\Config' => $baseDir . '/../lib/Config.php',
+    'OCA\\CloudFederationAPI\\Controller\\RequestHandlerController' => $baseDir . '/../lib/Controller/RequestHandlerController.php',
+);

apps/cloud_federation_api/composer/composer/autoload_namespaces.php

@@ -0,0 +1,9 @@
+<?php
+
+// autoload_namespaces.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = $vendorDir;
+
+return array(
+);

apps/cloud_federation_api/composer/composer/autoload_psr4.php

@@ -0,0 +1,10 @@
+<?php
+
+// autoload_psr4.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = $vendorDir;
+
+return array(
+    'OCA\\CloudFederationAPI\\' => array($baseDir . '/../lib'),
+);

apps/cloud_federation_api/composer/composer/autoload_real.php

@@ -0,0 +1,43 @@
+<?php
+
+// autoload_real.php @generated by Composer
+
+class ComposerAutoloaderInitCloudFederationAPI
+{
+    private static $loader;
+
+    public static function loadClassLoader($class)
+    {
+        if ('Composer\Autoload\ClassLoader' === $class) {
+            require __DIR__ . '/ClassLoader.php';
+        }
+    }
+
+    public static function getLoader()
+    {
+        if (null !== self::$loader) {
+            return self::$loader;
+        }
+
+        spl_autoload_register(array('ComposerAutoloaderInitCloudFederationAPI', 'loadClassLoader'), true, true);
+        self::$loader = $loader = new \Composer\Autoload\ClassLoader();
+        spl_autoload_unregister(array('ComposerAutoloaderInitCloudFederationAPI', 'loadClassLoader'));
+
+        $useStaticLoader = PHP_VERSION_ID >= 50600 && !defined('HHVM_VERSION') && (!function_exists('zend_loader_file_encoded') || !zend_loader_file_encoded());
+        if ($useStaticLoader) {
+            require_once __DIR__ . '/autoload_static.php';
+
+            call_user_func(\Composer\Autoload\ComposerStaticInitCloudFederationAPI::getInitializer($loader));
+        } else {
+            $classMap = require __DIR__ . '/autoload_classmap.php';
+            if ($classMap) {
+                $loader->addClassMap($classMap);
+            }
+        }
+
+        $loader->setClassMapAuthoritative(true);
+        $loader->register(true);
+
+        return $loader;
+    }
+}

apps/cloud_federation_api/composer/composer/autoload_static.php

@@ -0,0 +1,39 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInitCloudFederationAPI
+{
+    public static $prefixLengthsPsr4 = array (
+        'O' => 
+        array (
+            'OCA\\CloudFederationAPI\\' => 23,
+        ),
+    );
+
+    public static $prefixDirsPsr4 = array (
+        'OCA\\CloudFederationAPI\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/../lib',
+        ),
+    );
+
+    public static $classMap = array (
+        'OCA\\CloudFederationAPI\\AppInfo\\Application' => __DIR__ . '/..' . '/../lib/AppInfo/Application.php',
+        'OCA\\CloudFederationAPI\\Capabilities' => __DIR__ . '/..' . '/../lib/Capabilities.php',
+        'OCA\\CloudFederationAPI\\Config' => __DIR__ . '/..' . '/../lib/Config.php',
+        'OCA\\CloudFederationAPI\\Controller\\RequestHandlerController' => __DIR__ . '/..' . '/../lib/Controller/RequestHandlerController.php',
+    );
+
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+            $loader->prefixLengthsPsr4 = ComposerStaticInitCloudFederationAPI::$prefixLengthsPsr4;
+            $loader->prefixDirsPsr4 = ComposerStaticInitCloudFederationAPI::$prefixDirsPsr4;
+            $loader->classMap = ComposerStaticInitCloudFederationAPI::$classMap;
+
+        }, null, ClassLoader::class);
+    }
+}

apps/comments/appinfo/info.xml

@@ -5,7 +5,7 @@
 	<name>Comments</name>
 	<summary>Files app plugin to add comments to files</summary>
 	<description>Files app plugin to add comments to files</description>
-	<version>1.6.0</version>
+	<version>1.7.0</version>
 	<licence>agpl</licence>
 	<author>Arthur Schiwon</author>
 	<author>Vincent Petry</author>
@@ -17,7 +17,7 @@
 	<category>social</category>
 	<bugs>https://github.com/nextcloud/server/issues</bugs>
 	<dependencies>
-		<nextcloud min-version="16" max-version="16"/>
+		<nextcloud min-version="17" max-version="17"/>
 	</dependencies>
 
 	<activity>

apps/comments/img/comments-dark.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" height="32" width="32" viewBox="0 0 32 32"><path fill="#000" d="M16 3C7.163 3 0 7.925 0 14s7.163 11 16 11c.5 0 .98-.032 1.47-.063L26 32v-9.406c3.658-2.017 6-5.12 6-8.595 0-6.076-7.164-11-16-11z"/></svg>
+<svg width="32" height="32" version="1.1" viewBox="0 0 32 32" xmlns="http://www.w3.org/2000/svg"><path d="m6.667 4c-2.578 0-4.667 2.105-4.667 4.7v11.282c0 2.597 2.09 4.701 4.667 4.701 1.716 0.01 12.083 3e-3 17.057 0 1.115 0.842 1.807 1.748 3.057 3.206a0.93 0.93 0 0 0 0.561 0.103 0.969 0.969 0 0 0 0.445-0.187c0.302-0.223 0.466-0.603 0.427-0.988l-0.314-2.912a4.699 4.699 0 0 0 2.1-3.923v-11.281c0-2.596-2.09-4.701-4.667-4.701zm3.733 8.461c1.03 0 1.867 0.842 1.867 1.88 0 1.676-2.01 2.514-3.187 1.33-1.176-1.184-0.343-3.21 1.32-3.21zm5.6 0c1.03 0 1.867 0.842 1.867 1.88 0 1.676-2.01 2.514-3.187 1.33-1.176-1.184-0.343-3.21 1.32-3.21zm5.6 0c1.03 0 1.867 0.842 1.867 1.88 0 1.676-2.01 2.514-3.187 1.33-1.176-1.184-0.343-3.21 1.32-3.21z" stroke-width=".5"/></svg>

apps/comments/img/comments.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" height="32" width="32" viewBox="0 0 32 32"><path fill="#fff" d="M16 3C7.163 3 0 7.925 0 14s7.163 11 16 11c.5 0 .98-.032 1.47-.063L26 32v-9.406c3.658-2.017 6-5.12 6-8.595 0-6.076-7.164-11-16-11z"/></svg>
+<svg width="32" height="32" version="1.1" viewBox="0 0 32 32" xmlns="http://www.w3.org/2000/svg"><path d="m6.667 4c-2.578 0-4.667 2.105-4.667 4.7v11.282c0 2.597 2.09 4.701 4.667 4.701 1.716 0.01 12.083 3e-3 17.057 0 1.115 0.842 1.807 1.748 3.057 3.206a0.93 0.93 0 0 0 0.561 0.103 0.969 0.969 0 0 0 0.445-0.187c0.302-0.223 0.466-0.603 0.427-0.988l-0.314-2.912a4.699 4.699 0 0 0 2.1-3.923v-11.281c0-2.596-2.09-4.701-4.667-4.701zm3.733 8.461c1.03 0 1.867 0.842 1.867 1.88 0 1.676-2.01 2.514-3.187 1.33-1.176-1.184-0.343-3.21 1.32-3.21zm5.6 0c1.03 0 1.867 0.842 1.867 1.88 0 1.676-2.01 2.514-3.187 1.33-1.176-1.184-0.343-3.21 1.32-3.21zm5.6 0c1.03 0 1.867 0.842 1.867 1.88 0 1.676-2.01 2.514-3.187 1.33-1.176-1.184-0.343-3.21 1.32-3.21z" stroke-width=".5" fill="#fff"/></svg>

apps/comments/lib/AppInfo/Application.php

@@ -76,15 +76,7 @@ class Application extends App {
 	}
 
 	protected function registerNotifier() {
-		$this->getContainer()->getServer()->getNotificationManager()->registerNotifier(
-			function() {
-				return $this->getContainer()->query(Notifier::class);
-			},
-			function () {
-				$l = $this->getContainer()->getServer()->getL10NFactory()->get('comments');
-				return ['id' => 'comments', 'name' => $l->t('Comments')];
-			}
-		);
+		$this->getContainer()->getServer()->getNotificationManager()->registerNotifierService(Notifier::class);
 	}
 
 	protected function registerCommentsEventHandler() {

apps/comments/lib/Notification/Notifier.php

@@ -32,6 +32,7 @@ use OCP\IURLGenerator;
 use OCP\IUser;
 use OCP\IUserManager;
 use OCP\L10N\IFactory;
+use OCP\Notification\AlreadyProcessedException;
 use OCP\Notification\INotification;
 use OCP\Notification\INotifier;
 
@@ -66,13 +67,35 @@ class Notifier implements INotifier {
 		$this->userManager = $userManager;
 	}
 
+	/**
+	 * Identifier of the notifier, only use [a-z0-9_]
+	 *
+	 * @return string
+	 * @since 17.0.0
+	 */
+	public function getID(): string {
+		return 'comments';
+	}
+
+	/**
+	 * Human readable name describing the notifier
+	 *
+	 * @return string
+	 * @since 17.0.0
+	 */
+	public function getName(): string {
+		return $this->l10nFactory->get('comments')->t('Comments');
+	}
+
 	/**
 	 * @param INotification $notification
 	 * @param string $languageCode The code of the language that should be used to prepare the notification
 	 * @return INotification
 	 * @throws \InvalidArgumentException When the notification was not prepared by a notifier
+	 * @throws AlreadyProcessedException When the notification is not needed anymore and should be deleted
+	 * @since 9.0.0
 	 */
-	public function prepare(INotification $notification, $languageCode) {
+	public function prepare(INotification $notification, string $languageCode): INotification {
 		if($notification->getApp() !== 'comments') {
 			throw new \InvalidArgumentException();
 		}
@@ -101,7 +124,7 @@ class Notifier implements INotifier {
 				$userFolder = $this->rootFolder->getUserFolder($notification->getUser());
 				$nodes = $userFolder->getById((int)$parameters[1]);
 				if(empty($nodes)) {
-					throw new \InvalidArgumentException('Cannot resolve file ID to node instance');
+					throw new AlreadyProcessedException();
 				}
 				$node = $nodes[0];
 

apps/comments/src/commentstabview.js

@@ -354,7 +354,7 @@
 			});
 
 			var username = $el.find('.avatar').data('username');
-			if (username !== oc_current_user) {
+			if (username !== OC.getCurrentUser().uid) {
 				$el.find('.authorRow .avatar, .authorRow .author').contactsMenu(
 					username, 0, $el.find('.authorRow'));
 			}

apps/comments/tests/Unit/Controller/NotificationsTest.php

@@ -117,6 +117,9 @@ class NotificationsTest extends TestCase {
 		$comment->expects($this->any())
 			->method('getObjectType')
 			->willReturn('files');
+		$comment->expects($this->any())
+			->method('getId')
+			->willReturn('1234');
 
 		$this->commentsManager->expects($this->any())
 			->method('get')
@@ -125,6 +128,7 @@ class NotificationsTest extends TestCase {
 
 		$file = $this->createMock(Node::class);
 		$folder = $this->createMock(Folder::class);
+		$user = $this->createMock(IUser::class);
 
 		$this->rootFolder->expects($this->once())
 			->method('getUserFolder')
@@ -136,7 +140,11 @@ class NotificationsTest extends TestCase {
 
 		$this->session->expects($this->once())
 			->method('getUser')
-			->willReturn($this->createMock(IUser::class));
+			->willReturn($user);
+
+		$user->expects($this->any())
+			->method('getUID')
+			->willReturn('user');
 
 		$notification = $this->createMock(INotification::class);
 		$notification->expects($this->any())
@@ -163,9 +171,15 @@ class NotificationsTest extends TestCase {
 		$this->rootFolder->expects($this->never())
 			->method('getUserFolder');
 
+		$user = $this->createMock(IUser::class);
+
 		$this->session->expects($this->once())
 			->method('getUser')
-			->willReturn($this->createMock(IUser::class));
+			->willReturn($user);
+
+		$user->expects($this->any())
+			->method('getUID')
+			->willReturn('user');
 
 		$this->notificationManager->expects($this->never())
 			->method('createNotification');
@@ -181,6 +195,9 @@ class NotificationsTest extends TestCase {
 		$comment->expects($this->any())
 			->method('getObjectType')
 			->willReturn('files');
+		$comment->expects($this->any())
+			->method('getId')
+			->willReturn('1234');
 
 		$this->commentsManager->expects($this->any())
 			->method('get')
@@ -197,9 +214,15 @@ class NotificationsTest extends TestCase {
 			->method('getById')
 			->willReturn([]);
 
+		$user = $this->createMock(IUser::class);
+
 		$this->session->expects($this->once())
 			->method('getUser')
-			->willReturn($this->createMock(IUser::class));
+			->willReturn($user);
+
+		$user->expects($this->any())
+			->method('getUID')
+			->willReturn('user');
 
 		$notification = $this->createMock(INotification::class);
 		$notification->expects($this->any())

apps/comments/tests/Unit/Notification/ListenerTest.php

@@ -91,6 +91,9 @@ class ListenerTest extends TestCase {
 				[ 'type' => 'user', 'id' => '23452-4333-54353-2342'],
 				[ 'type' => 'user', 'id' => 'yolo'],
 			]);
+		$comment->expects($this->atLeastOnce())
+			->method('getId')
+			->willReturn('1234');
 
 		/** @var CommentsEvent|\PHPUnit_Framework_MockObject_MockObject $event */
 		$event = $this->getMockBuilder(CommentsEvent::class)
@@ -186,6 +189,9 @@ class ListenerTest extends TestCase {
 		$comment->expects($this->once())
 			->method('getMentions')
 			->willReturn([[ 'type' => 'user', 'id' => 'foobar']]);
+		$comment->expects($this->atLeastOnce())
+			->method('getId')
+			->willReturn('1234');
 
 		/** @var CommentsEvent|\PHPUnit_Framework_MockObject_MockObject $event */
 		$event = $this->getMockBuilder(CommentsEvent::class)

apps/comments/tests/Unit/Notification/NotifierTest.php

@@ -195,6 +195,9 @@ class NotifierTest extends TestCase {
 			->expects($this->any())
 			->method('getMentions')
 			->willReturn([['type' => 'user', 'id' => 'you']]);
+		$this->comment->expects($this->atLeastOnce())
+			->method('getId')
+			->willReturn('1234');
 
 		$this->commentsManager
 			->expects($this->once())
@@ -539,7 +542,7 @@ class NotifierTest extends TestCase {
 	}
 
 	/**
-	 * @expectedException \InvalidArgumentException
+	 * @expectedException \OCP\Notification\AlreadyProcessedException
 	 */
 	public function testPrepareUnresolvableFileID() {
 		$displayName = 'Huraga';

apps/comments/webpack.js

@@ -1,4 +1,4 @@
-const path = require('path');
+const path = require('path')
 
 module.exports = {
 	entry: path.join(__dirname, 'src', 'comments.js'),
@@ -7,34 +7,7 @@ module.exports = {
 		publicPath: '/js/',
 		filename: 'comments.js'
 	},
-	module: {
-		rules: [
-			{
-				test: /\.css$/,
-				use: ['style-loader', 'css-loader']
-			},
-			{
-				test: /\.scss$/,
-				use: ['style-loader', 'css-loader', 'sass-loader']
-			},
-			{
-				test: /\.js$/,
-				loader: 'babel-loader',
-				exclude: /node_modules/
-			},
-			{
-				test: /\.(png|jpg|gif|svg)$/,
-				loader: 'file-loader',
-				options: {
-					name: '[name].[ext]?[hash]'
-				}
-			}
-		]
-	},
 	externals: {
 		jquery: 'jQuery'
-	},
-	resolve: {
-		extensions: ['*', '.js']
 	}
-};
+}

apps/dav/appinfo/app.php

@@ -24,6 +24,7 @@
  */
 
 use OCA\DAV\AppInfo\Application;
+use OCA\DAV\CalDAV\WebcalCaching\RefreshWebcalService;
 use OCA\DAV\CardDAV\CardDavBackend;
 use Symfony\Component\EventDispatcher\GenericEvent;
 
@@ -55,6 +56,13 @@ $eventDispatcher->addListener('\OCA\DAV\CalDAV\CalDavBackend::createSubscription
 		$jobList = $app->getContainer()->getServer()->getJobList();
 		$subscriptionData = $event->getArgument('subscriptionData');
 
+		/**
+		 * Initial subscription refetch
+		 * @var RefreshWebcalService $refreshWebcalService
+		 */
+		$refreshWebcalService = $app->getContainer()->query(RefreshWebcalService::class);
+		$refreshWebcalService->refreshSubscription($subscriptionData['principaluri'], $subscriptionData['uri']);
+
 		$jobList->add(\OCA\DAV\BackgroundJob\RefreshWebcalJob::class, [
 			'principaluri' => $subscriptionData['principaluri'],
 			'uri' => $subscriptionData['uri']
@@ -108,3 +116,6 @@ $calendarManager->register(function() use ($calendarManager, $app) {
 		$app->setupCalendarProvider($calendarManager, $user->getUID());
 	}
 });
+
+$app->registerNotifier();
+$app->registerCalendarReminders();

apps/dav/appinfo/info.xml

@@ -5,7 +5,7 @@
 	<name>WebDAV</name>
 	<summary>WebDAV endpoint</summary>
 	<description>WebDAV endpoint</description>
-	<version>1.9.2</version>
+	<version>1.13.0</version>
 	<licence>agpl</licence>
 	<author>owncloud.org</author>
 	<namespace>DAV</namespace>
@@ -16,13 +16,14 @@
 	<category>integration</category>
 	<bugs>https://github.com/nextcloud/server/issues</bugs>
 	<dependencies>
-		<nextcloud min-version="16" max-version="16"/>
+		<nextcloud min-version="17" max-version="17"/>
 	</dependencies>
 
 	<background-jobs>
 		<job>OCA\DAV\BackgroundJob\CleanupDirectLinksJob</job>
 		<job>OCA\DAV\BackgroundJob\UpdateCalendarResourcesRoomsBackgroundJob</job>
 		<job>OCA\DAV\BackgroundJob\CleanupInvitationTokenJob</job>
+		<job>OCA\DAV\BackgroundJob\EventReminderJob</job>
 	</background-jobs>
 
 	<repair-steps>
@@ -32,6 +33,7 @@
 			<step>OCA\DAV\Migration\CalDAVRemoveEmptyValue</step>
 			<step>OCA\DAV\Migration\BuildCalendarSearchIndex</step>
 			<step>OCA\DAV\Migration\RefreshWebcalJobRegistrar</step>
+			<step>OCA\DAV\Migration\RegisterBuildReminderIndexBackgroundJob</step>
 			<step>OCA\DAV\Migration\RemoveOrphanEventsAndContacts</step>
 			<step>OCA\DAV\Migration\RemoveClassifiedEventActivity</step>
 		</post-migration>
@@ -45,6 +47,7 @@
 		<command>OCA\DAV\Command\CreateCalendar</command>
 		<command>OCA\DAV\Command\MoveCalendar</command>
 		<command>OCA\DAV\Command\ListCalendars</command>
+		<command>OCA\DAV\Command\SendEventReminders</command>
 		<command>OCA\DAV\Command\SyncBirthdayCalendar</command>
 		<command>OCA\DAV\Command\SyncSystemAddressBook</command>
 		<command>OCA\DAV\Command\RemoveInvalidShares</command>

apps/dav/appinfo/v1/caldav.php

@@ -46,8 +46,9 @@ $principalBackend = new Principal(
 	\OC::$server->getGroupManager(),
 	\OC::$server->getShareManager(),
 	\OC::$server->getUserSession(),
-	\OC::$server->getConfig(),
 	\OC::$server->getAppManager(),
+	\OC::$server->query(\OCA\DAV\CalDAV\Proxy\ProxyMapper::class),
+	\OC::$server->getConfig(),
 	'principals/'
 );
 $db = \OC::$server->getDatabaseConnection();

apps/dav/appinfo/v1/carddav.php

@@ -47,8 +47,9 @@ $principalBackend = new Principal(
 	\OC::$server->getGroupManager(),
 	\OC::$server->getShareManager(),
 	\OC::$server->getUserSession(),
-	\OC::$server->getConfig(),
 	\OC::$server->getAppManager(),
+	\OC::$server->query(\OCA\DAV\CalDAV\Proxy\ProxyMapper::class),
+	\OC::$server->getConfig(),
 	'principals/'
 );
 $db = \OC::$server->getDatabaseConnection();

apps/dav/appinfo/v1/publicwebdav.php

@@ -79,7 +79,9 @@ $server = $serverFactory->createServer($baseuri, $requestUri, $authPlugin, funct
 	\OC\Files\Filesystem::addStorageWrapper('sharePermissions', function ($mountPoint, $storage) use ($share) {
 		return new \OC\Files\Storage\Wrapper\PermissionsMask(array('storage' => $storage, 'mask' => $share->getPermissions() | \OCP\Constants::PERMISSION_SHARE));
 	});
-
+	\OC\Files\Filesystem::addStorageWrapper('shareOwner', function ($mountPoint, $storage) use ($share) {
+		return new \OCA\DAV\Storage\PublicOwnerWrapper(['storage' => $storage, 'owner' => $share->getShareOwner()]);
+	});
 	\OC\Files\Filesystem::logWarningWhenAddingStorageWrapper($previousLog);
 
 	OC_Util::tearDownFS();

apps/dav/composer/composer/autoload_classmap.php

@@ -11,8 +11,10 @@ return array(
     'OCA\\DAV\\Avatars\\AvatarHome' => $baseDir . '/../lib/Avatars/AvatarHome.php',
     'OCA\\DAV\\Avatars\\AvatarNode' => $baseDir . '/../lib/Avatars/AvatarNode.php',
     'OCA\\DAV\\Avatars\\RootCollection' => $baseDir . '/../lib/Avatars/RootCollection.php',
+    'OCA\\DAV\\BackgroundJob\\BuildReminderIndexBackgroundJob' => $baseDir . '/../lib/BackgroundJob/BuildReminderIndexBackgroundJob.php',
     'OCA\\DAV\\BackgroundJob\\CleanupDirectLinksJob' => $baseDir . '/../lib/BackgroundJob/CleanupDirectLinksJob.php',
     'OCA\\DAV\\BackgroundJob\\CleanupInvitationTokenJob' => $baseDir . '/../lib/BackgroundJob/CleanupInvitationTokenJob.php',
+    'OCA\\DAV\\BackgroundJob\\EventReminderJob' => $baseDir . '/../lib/BackgroundJob/EventReminderJob.php',
     'OCA\\DAV\\BackgroundJob\\GenerateBirthdayCalendarBackgroundJob' => $baseDir . '/../lib/BackgroundJob/GenerateBirthdayCalendarBackgroundJob.php',
     'OCA\\DAV\\BackgroundJob\\RefreshWebcalJob' => $baseDir . '/../lib/BackgroundJob/RefreshWebcalJob.php',
     'OCA\\DAV\\BackgroundJob\\RegisterRegenerateBirthdayCalendars' => $baseDir . '/../lib/BackgroundJob/RegisterRegenerateBirthdayCalendars.php',
@@ -44,11 +46,24 @@ return array(
     'OCA\\DAV\\CalDAV\\Plugin' => $baseDir . '/../lib/CalDAV/Plugin.php',
     'OCA\\DAV\\CalDAV\\Principal\\Collection' => $baseDir . '/../lib/CalDAV/Principal/Collection.php',
     'OCA\\DAV\\CalDAV\\Principal\\User' => $baseDir . '/../lib/CalDAV/Principal/User.php',
+    'OCA\\DAV\\CalDAV\\Proxy\\Proxy' => $baseDir . '/../lib/CalDAV/Proxy/Proxy.php',
+    'OCA\\DAV\\CalDAV\\Proxy\\ProxyMapper' => $baseDir . '/../lib/CalDAV/Proxy/ProxyMapper.php',
     'OCA\\DAV\\CalDAV\\PublicCalendar' => $baseDir . '/../lib/CalDAV/PublicCalendar.php',
     'OCA\\DAV\\CalDAV\\PublicCalendarObject' => $baseDir . '/../lib/CalDAV/PublicCalendarObject.php',
     'OCA\\DAV\\CalDAV\\PublicCalendarRoot' => $baseDir . '/../lib/CalDAV/PublicCalendarRoot.php',
     'OCA\\DAV\\CalDAV\\Publishing\\PublishPlugin' => $baseDir . '/../lib/CalDAV/Publishing/PublishPlugin.php',
     'OCA\\DAV\\CalDAV\\Publishing\\Xml\\Publisher' => $baseDir . '/../lib/CalDAV/Publishing/Xml/Publisher.php',
+    'OCA\\DAV\\CalDAV\\Reminder\\Backend' => $baseDir . '/../lib/CalDAV/Reminder/Backend.php',
+    'OCA\\DAV\\CalDAV\\Reminder\\INotificationProvider' => $baseDir . '/../lib/CalDAV/Reminder/INotificationProvider.php',
+    'OCA\\DAV\\CalDAV\\Reminder\\NotificationProviderManager' => $baseDir . '/../lib/CalDAV/Reminder/NotificationProviderManager.php',
+    'OCA\\DAV\\CalDAV\\Reminder\\NotificationProvider\\AbstractProvider' => $baseDir . '/../lib/CalDAV/Reminder/NotificationProvider/AbstractProvider.php',
+    'OCA\\DAV\\CalDAV\\Reminder\\NotificationProvider\\AudioProvider' => $baseDir . '/../lib/CalDAV/Reminder/NotificationProvider/AudioProvider.php',
+    'OCA\\DAV\\CalDAV\\Reminder\\NotificationProvider\\EmailProvider' => $baseDir . '/../lib/CalDAV/Reminder/NotificationProvider/EmailProvider.php',
+    'OCA\\DAV\\CalDAV\\Reminder\\NotificationProvider\\ProviderNotAvailableException' => $baseDir . '/../lib/CalDAV/Reminder/NotificationProvider/ProviderNotAvailableException.php',
+    'OCA\\DAV\\CalDAV\\Reminder\\NotificationProvider\\PushProvider' => $baseDir . '/../lib/CalDAV/Reminder/NotificationProvider/PushProvider.php',
+    'OCA\\DAV\\CalDAV\\Reminder\\NotificationTypeDoesNotExistException' => $baseDir . '/../lib/CalDAV/Reminder/NotificationTypeDoesNotExistException.php',
+    'OCA\\DAV\\CalDAV\\Reminder\\Notifier' => $baseDir . '/../lib/CalDAV/Reminder/Notifier.php',
+    'OCA\\DAV\\CalDAV\\Reminder\\ReminderService' => $baseDir . '/../lib/CalDAV/Reminder/ReminderService.php',
     'OCA\\DAV\\CalDAV\\ResourceBooking\\AbstractPrincipalBackend' => $baseDir . '/../lib/CalDAV/ResourceBooking/AbstractPrincipalBackend.php',
     'OCA\\DAV\\CalDAV\\ResourceBooking\\ResourcePrincipalBackend' => $baseDir . '/../lib/CalDAV/ResourceBooking/ResourcePrincipalBackend.php',
     'OCA\\DAV\\CalDAV\\ResourceBooking\\RoomPrincipalBackend' => $baseDir . '/../lib/CalDAV/ResourceBooking/RoomPrincipalBackend.php',
@@ -63,6 +78,7 @@ return array(
     'OCA\\DAV\\CalDAV\\Search\\Xml\\Filter\\SearchTermFilter' => $baseDir . '/../lib/CalDAV/Search/Xml/Filter/SearchTermFilter.php',
     'OCA\\DAV\\CalDAV\\Search\\Xml\\Request\\CalendarSearchReport' => $baseDir . '/../lib/CalDAV/Search/Xml/Request/CalendarSearchReport.php',
     'OCA\\DAV\\CalDAV\\WebcalCaching\\Plugin' => $baseDir . '/../lib/CalDAV/WebcalCaching/Plugin.php',
+    'OCA\\DAV\\CalDAV\\WebcalCaching\\RefreshWebcalService' => $baseDir . '/../lib/CalDAV/WebcalCaching/RefreshWebcalService.php',
     'OCA\\DAV\\Capabilities' => $baseDir . '/../lib/Capabilities.php',
     'OCA\\DAV\\CardDAV\\AddressBook' => $baseDir . '/../lib/CardDAV/AddressBook.php',
     'OCA\\DAV\\CardDAV\\AddressBookImpl' => $baseDir . '/../lib/CardDAV/AddressBookImpl.php',
@@ -84,6 +100,7 @@ return array(
     'OCA\\DAV\\Command\\ListCalendars' => $baseDir . '/../lib/Command/ListCalendars.php',
     'OCA\\DAV\\Command\\MoveCalendar' => $baseDir . '/../lib/Command/MoveCalendar.php',
     'OCA\\DAV\\Command\\RemoveInvalidShares' => $baseDir . '/../lib/Command/RemoveInvalidShares.php',
+    'OCA\\DAV\\Command\\SendEventReminders' => $baseDir . '/../lib/Command/SendEventReminders.php',
     'OCA\\DAV\\Command\\SyncBirthdayCalendar' => $baseDir . '/../lib/Command/SyncBirthdayCalendar.php',
     'OCA\\DAV\\Command\\SyncSystemAddressBook' => $baseDir . '/../lib/Command/SyncSystemAddressBook.php',
     'OCA\\DAV\\Comments\\CommentNode' => $baseDir . '/../lib/Comments/CommentNode.php',
@@ -102,7 +119,6 @@ return array(
     'OCA\\DAV\\Connector\\Sabre\\ChecksumList' => $baseDir . '/../lib/Connector/Sabre/ChecksumList.php',
     'OCA\\DAV\\Connector\\Sabre\\CommentPropertiesPlugin' => $baseDir . '/../lib/Connector/Sabre/CommentPropertiesPlugin.php',
     'OCA\\DAV\\Connector\\Sabre\\CopyEtagHeaderPlugin' => $baseDir . '/../lib/Connector/Sabre/CopyEtagHeaderPlugin.php',
-    'OCA\\DAV\\Connector\\Sabre\\CustomPropertiesBackend' => $baseDir . '/../lib/Connector/Sabre/CustomPropertiesBackend.php',
     'OCA\\DAV\\Connector\\Sabre\\DavAclPlugin' => $baseDir . '/../lib/Connector/Sabre/DavAclPlugin.php',
     'OCA\\DAV\\Connector\\Sabre\\Directory' => $baseDir . '/../lib/Connector/Sabre/Directory.php',
     'OCA\\DAV\\Connector\\Sabre\\DummyGetResponsePlugin' => $baseDir . '/../lib/Connector/Sabre/DummyGetResponsePlugin.php',
@@ -126,6 +142,7 @@ return array(
     'OCA\\DAV\\Connector\\Sabre\\Server' => $baseDir . '/../lib/Connector/Sabre/Server.php',
     'OCA\\DAV\\Connector\\Sabre\\ServerFactory' => $baseDir . '/../lib/Connector/Sabre/ServerFactory.php',
     'OCA\\DAV\\Connector\\Sabre\\ShareTypeList' => $baseDir . '/../lib/Connector/Sabre/ShareTypeList.php',
+    'OCA\\DAV\\Connector\\Sabre\\ShareeList' => $baseDir . '/../lib/Connector/Sabre/ShareeList.php',
     'OCA\\DAV\\Connector\\Sabre\\SharesPlugin' => $baseDir . '/../lib/Connector/Sabre/SharesPlugin.php',
     'OCA\\DAV\\Connector\\Sabre\\TagList' => $baseDir . '/../lib/Connector/Sabre/TagList.php',
     'OCA\\DAV\\Connector\\Sabre\\TagsPlugin' => $baseDir . '/../lib/Connector/Sabre/TagsPlugin.php',
@@ -147,6 +164,7 @@ return array(
     'OCA\\DAV\\Direct\\DirectHome' => $baseDir . '/../lib/Direct/DirectHome.php',
     'OCA\\DAV\\Direct\\Server' => $baseDir . '/../lib/Direct/Server.php',
     'OCA\\DAV\\Direct\\ServerFactory' => $baseDir . '/../lib/Direct/ServerFactory.php',
+    'OCA\\DAV\\Exception\\UnsupportedLimitOnInitialSyncException' => $baseDir . '/../lib/Exception/UnsupportedLimitOnInitialSyncException.php',
     'OCA\\DAV\\Files\\BrowserErrorPagePlugin' => $baseDir . '/../lib/Files/BrowserErrorPagePlugin.php',
     'OCA\\DAV\\Files\\FileSearchBackend' => $baseDir . '/../lib/Files/FileSearchBackend.php',
     'OCA\\DAV\\Files\\FilesHome' => $baseDir . '/../lib/Files/FilesHome.php',
@@ -162,6 +180,7 @@ return array(
     'OCA\\DAV\\Migration\\FixBirthdayCalendarComponent' => $baseDir . '/../lib/Migration/FixBirthdayCalendarComponent.php',
     'OCA\\DAV\\Migration\\RefreshWebcalJobRegistrar' => $baseDir . '/../lib/Migration/RefreshWebcalJobRegistrar.php',
     'OCA\\DAV\\Migration\\RegenerateBirthdayCalendars' => $baseDir . '/../lib/Migration/RegenerateBirthdayCalendars.php',
+    'OCA\\DAV\\Migration\\RegisterBuildReminderIndexBackgroundJob' => $baseDir . '/../lib/Migration/RegisterBuildReminderIndexBackgroundJob.php',
     'OCA\\DAV\\Migration\\RemoveClassifiedEventActivity' => $baseDir . '/../lib/Migration/RemoveClassifiedEventActivity.php',
     'OCA\\DAV\\Migration\\RemoveOrphanEventsAndContacts' => $baseDir . '/../lib/Migration/RemoveOrphanEventsAndContacts.php',
     'OCA\\DAV\\Migration\\Version1004Date20170825134824' => $baseDir . '/../lib/Migration/Version1004Date20170825134824.php',
@@ -178,11 +197,15 @@ return array(
     'OCA\\DAV\\Migration\\Version1008Date20181105110300' => $baseDir . '/../lib/Migration/Version1008Date20181105110300.php',
     'OCA\\DAV\\Migration\\Version1008Date20181105112049' => $baseDir . '/../lib/Migration/Version1008Date20181105112049.php',
     'OCA\\DAV\\Migration\\Version1008Date20181114084440' => $baseDir . '/../lib/Migration/Version1008Date20181114084440.php',
+    'OCA\\DAV\\Migration\\Version1011Date20190725113607' => $baseDir . '/../lib/Migration/Version1011Date20190725113607.php',
+    'OCA\\DAV\\Migration\\Version1011Date20190806104428' => $baseDir . '/../lib/Migration/Version1011Date20190806104428.php',
+    'OCA\\DAV\\Migration\\Version1012Date20190808122342' => $baseDir . '/../lib/Migration/Version1012Date20190808122342.php',
     'OCA\\DAV\\Provisioning\\Apple\\AppleProvisioningNode' => $baseDir . '/../lib/Provisioning/Apple/AppleProvisioningNode.php',
     'OCA\\DAV\\Provisioning\\Apple\\AppleProvisioningPlugin' => $baseDir . '/../lib/Provisioning/Apple/AppleProvisioningPlugin.php',
     'OCA\\DAV\\RootCollection' => $baseDir . '/../lib/RootCollection.php',
     'OCA\\DAV\\Server' => $baseDir . '/../lib/Server.php',
     'OCA\\DAV\\Settings\\CalDAVSettings' => $baseDir . '/../lib/Settings/CalDAVSettings.php',
+    'OCA\\DAV\\Storage\\PublicOwnerWrapper' => $baseDir . '/../lib/Storage/PublicOwnerWrapper.php',
     'OCA\\DAV\\SystemTag\\SystemTagMappingNode' => $baseDir . '/../lib/SystemTag/SystemTagMappingNode.php',
     'OCA\\DAV\\SystemTag\\SystemTagNode' => $baseDir . '/../lib/SystemTag/SystemTagNode.php',
     'OCA\\DAV\\SystemTag\\SystemTagPlugin' => $baseDir . '/../lib/SystemTag/SystemTagPlugin.php',
@@ -190,6 +213,7 @@ return array(
     'OCA\\DAV\\SystemTag\\SystemTagsObjectMappingCollection' => $baseDir . '/../lib/SystemTag/SystemTagsObjectMappingCollection.php',
     'OCA\\DAV\\SystemTag\\SystemTagsObjectTypeCollection' => $baseDir . '/../lib/SystemTag/SystemTagsObjectTypeCollection.php',
     'OCA\\DAV\\SystemTag\\SystemTagsRelationsCollection' => $baseDir . '/../lib/SystemTag/SystemTagsRelationsCollection.php',
+    'OCA\\DAV\\Traits\\PrincipalProxyTrait' => $baseDir . '/../lib/Traits/PrincipalProxyTrait.php',
     'OCA\\DAV\\Upload\\AssemblyStream' => $baseDir . '/../lib/Upload/AssemblyStream.php',
     'OCA\\DAV\\Upload\\ChunkingPlugin' => $baseDir . '/../lib/Upload/ChunkingPlugin.php',
     'OCA\\DAV\\Upload\\CleanupService' => $baseDir . '/../lib/Upload/CleanupService.php',

apps/dav/composer/composer/autoload_static.php

@@ -26,8 +26,10 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\Avatars\\AvatarHome' => __DIR__ . '/..' . '/../lib/Avatars/AvatarHome.php',
         'OCA\\DAV\\Avatars\\AvatarNode' => __DIR__ . '/..' . '/../lib/Avatars/AvatarNode.php',
         'OCA\\DAV\\Avatars\\RootCollection' => __DIR__ . '/..' . '/../lib/Avatars/RootCollection.php',
+        'OCA\\DAV\\BackgroundJob\\BuildReminderIndexBackgroundJob' => __DIR__ . '/..' . '/../lib/BackgroundJob/BuildReminderIndexBackgroundJob.php',
         'OCA\\DAV\\BackgroundJob\\CleanupDirectLinksJob' => __DIR__ . '/..' . '/../lib/BackgroundJob/CleanupDirectLinksJob.php',
         'OCA\\DAV\\BackgroundJob\\CleanupInvitationTokenJob' => __DIR__ . '/..' . '/../lib/BackgroundJob/CleanupInvitationTokenJob.php',
+        'OCA\\DAV\\BackgroundJob\\EventReminderJob' => __DIR__ . '/..' . '/../lib/BackgroundJob/EventReminderJob.php',
         'OCA\\DAV\\BackgroundJob\\GenerateBirthdayCalendarBackgroundJob' => __DIR__ . '/..' . '/../lib/BackgroundJob/GenerateBirthdayCalendarBackgroundJob.php',
         'OCA\\DAV\\BackgroundJob\\RefreshWebcalJob' => __DIR__ . '/..' . '/../lib/BackgroundJob/RefreshWebcalJob.php',
         'OCA\\DAV\\BackgroundJob\\RegisterRegenerateBirthdayCalendars' => __DIR__ . '/..' . '/../lib/BackgroundJob/RegisterRegenerateBirthdayCalendars.php',
@@ -59,11 +61,24 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\CalDAV\\Plugin' => __DIR__ . '/..' . '/../lib/CalDAV/Plugin.php',
         'OCA\\DAV\\CalDAV\\Principal\\Collection' => __DIR__ . '/..' . '/../lib/CalDAV/Principal/Collection.php',
         'OCA\\DAV\\CalDAV\\Principal\\User' => __DIR__ . '/..' . '/../lib/CalDAV/Principal/User.php',
+        'OCA\\DAV\\CalDAV\\Proxy\\Proxy' => __DIR__ . '/..' . '/../lib/CalDAV/Proxy/Proxy.php',
+        'OCA\\DAV\\CalDAV\\Proxy\\ProxyMapper' => __DIR__ . '/..' . '/../lib/CalDAV/Proxy/ProxyMapper.php',
         'OCA\\DAV\\CalDAV\\PublicCalendar' => __DIR__ . '/..' . '/../lib/CalDAV/PublicCalendar.php',
         'OCA\\DAV\\CalDAV\\PublicCalendarObject' => __DIR__ . '/..' . '/../lib/CalDAV/PublicCalendarObject.php',
         'OCA\\DAV\\CalDAV\\PublicCalendarRoot' => __DIR__ . '/..' . '/../lib/CalDAV/PublicCalendarRoot.php',
         'OCA\\DAV\\CalDAV\\Publishing\\PublishPlugin' => __DIR__ . '/..' . '/../lib/CalDAV/Publishing/PublishPlugin.php',
         'OCA\\DAV\\CalDAV\\Publishing\\Xml\\Publisher' => __DIR__ . '/..' . '/../lib/CalDAV/Publishing/Xml/Publisher.php',
+        'OCA\\DAV\\CalDAV\\Reminder\\Backend' => __DIR__ . '/..' . '/../lib/CalDAV/Reminder/Backend.php',
+        'OCA\\DAV\\CalDAV\\Reminder\\INotificationProvider' => __DIR__ . '/..' . '/../lib/CalDAV/Reminder/INotificationProvider.php',
+        'OCA\\DAV\\CalDAV\\Reminder\\NotificationProviderManager' => __DIR__ . '/..' . '/../lib/CalDAV/Reminder/NotificationProviderManager.php',
+        'OCA\\DAV\\CalDAV\\Reminder\\NotificationProvider\\AbstractProvider' => __DIR__ . '/..' . '/../lib/CalDAV/Reminder/NotificationProvider/AbstractProvider.php',
+        'OCA\\DAV\\CalDAV\\Reminder\\NotificationProvider\\AudioProvider' => __DIR__ . '/..' . '/../lib/CalDAV/Reminder/NotificationProvider/AudioProvider.php',
+        'OCA\\DAV\\CalDAV\\Reminder\\NotificationProvider\\EmailProvider' => __DIR__ . '/..' . '/../lib/CalDAV/Reminder/NotificationProvider/EmailProvider.php',
+        'OCA\\DAV\\CalDAV\\Reminder\\NotificationProvider\\ProviderNotAvailableException' => __DIR__ . '/..' . '/../lib/CalDAV/Reminder/NotificationProvider/ProviderNotAvailableException.php',
+        'OCA\\DAV\\CalDAV\\Reminder\\NotificationProvider\\PushProvider' => __DIR__ . '/..' . '/../lib/CalDAV/Reminder/NotificationProvider/PushProvider.php',
+        'OCA\\DAV\\CalDAV\\Reminder\\NotificationTypeDoesNotExistException' => __DIR__ . '/..' . '/../lib/CalDAV/Reminder/NotificationTypeDoesNotExistException.php',
+        'OCA\\DAV\\CalDAV\\Reminder\\Notifier' => __DIR__ . '/..' . '/../lib/CalDAV/Reminder/Notifier.php',
+        'OCA\\DAV\\CalDAV\\Reminder\\ReminderService' => __DIR__ . '/..' . '/../lib/CalDAV/Reminder/ReminderService.php',
         'OCA\\DAV\\CalDAV\\ResourceBooking\\AbstractPrincipalBackend' => __DIR__ . '/..' . '/../lib/CalDAV/ResourceBooking/AbstractPrincipalBackend.php',
         'OCA\\DAV\\CalDAV\\ResourceBooking\\ResourcePrincipalBackend' => __DIR__ . '/..' . '/../lib/CalDAV/ResourceBooking/ResourcePrincipalBackend.php',
         'OCA\\DAV\\CalDAV\\ResourceBooking\\RoomPrincipalBackend' => __DIR__ . '/..' . '/../lib/CalDAV/ResourceBooking/RoomPrincipalBackend.php',
@@ -78,6 +93,7 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\CalDAV\\Search\\Xml\\Filter\\SearchTermFilter' => __DIR__ . '/..' . '/../lib/CalDAV/Search/Xml/Filter/SearchTermFilter.php',
         'OCA\\DAV\\CalDAV\\Search\\Xml\\Request\\CalendarSearchReport' => __DIR__ . '/..' . '/../lib/CalDAV/Search/Xml/Request/CalendarSearchReport.php',
         'OCA\\DAV\\CalDAV\\WebcalCaching\\Plugin' => __DIR__ . '/..' . '/../lib/CalDAV/WebcalCaching/Plugin.php',
+        'OCA\\DAV\\CalDAV\\WebcalCaching\\RefreshWebcalService' => __DIR__ . '/..' . '/../lib/CalDAV/WebcalCaching/RefreshWebcalService.php',
         'OCA\\DAV\\Capabilities' => __DIR__ . '/..' . '/../lib/Capabilities.php',
         'OCA\\DAV\\CardDAV\\AddressBook' => __DIR__ . '/..' . '/../lib/CardDAV/AddressBook.php',
         'OCA\\DAV\\CardDAV\\AddressBookImpl' => __DIR__ . '/..' . '/../lib/CardDAV/AddressBookImpl.php',
@@ -99,6 +115,7 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\Command\\ListCalendars' => __DIR__ . '/..' . '/../lib/Command/ListCalendars.php',
         'OCA\\DAV\\Command\\MoveCalendar' => __DIR__ . '/..' . '/../lib/Command/MoveCalendar.php',
         'OCA\\DAV\\Command\\RemoveInvalidShares' => __DIR__ . '/..' . '/../lib/Command/RemoveInvalidShares.php',
+        'OCA\\DAV\\Command\\SendEventReminders' => __DIR__ . '/..' . '/../lib/Command/SendEventReminders.php',
         'OCA\\DAV\\Command\\SyncBirthdayCalendar' => __DIR__ . '/..' . '/../lib/Command/SyncBirthdayCalendar.php',
         'OCA\\DAV\\Command\\SyncSystemAddressBook' => __DIR__ . '/..' . '/../lib/Command/SyncSystemAddressBook.php',
         'OCA\\DAV\\Comments\\CommentNode' => __DIR__ . '/..' . '/../lib/Comments/CommentNode.php',
@@ -117,7 +134,6 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\Connector\\Sabre\\ChecksumList' => __DIR__ . '/..' . '/../lib/Connector/Sabre/ChecksumList.php',
         'OCA\\DAV\\Connector\\Sabre\\CommentPropertiesPlugin' => __DIR__ . '/..' . '/../lib/Connector/Sabre/CommentPropertiesPlugin.php',
         'OCA\\DAV\\Connector\\Sabre\\CopyEtagHeaderPlugin' => __DIR__ . '/..' . '/../lib/Connector/Sabre/CopyEtagHeaderPlugin.php',
-        'OCA\\DAV\\Connector\\Sabre\\CustomPropertiesBackend' => __DIR__ . '/..' . '/../lib/Connector/Sabre/CustomPropertiesBackend.php',
         'OCA\\DAV\\Connector\\Sabre\\DavAclPlugin' => __DIR__ . '/..' . '/../lib/Connector/Sabre/DavAclPlugin.php',
         'OCA\\DAV\\Connector\\Sabre\\Directory' => __DIR__ . '/..' . '/../lib/Connector/Sabre/Directory.php',
         'OCA\\DAV\\Connector\\Sabre\\DummyGetResponsePlugin' => __DIR__ . '/..' . '/../lib/Connector/Sabre/DummyGetResponsePlugin.php',
@@ -141,6 +157,7 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\Connector\\Sabre\\Server' => __DIR__ . '/..' . '/../lib/Connector/Sabre/Server.php',
         'OCA\\DAV\\Connector\\Sabre\\ServerFactory' => __DIR__ . '/..' . '/../lib/Connector/Sabre/ServerFactory.php',
         'OCA\\DAV\\Connector\\Sabre\\ShareTypeList' => __DIR__ . '/..' . '/../lib/Connector/Sabre/ShareTypeList.php',
+        'OCA\\DAV\\Connector\\Sabre\\ShareeList' => __DIR__ . '/..' . '/../lib/Connector/Sabre/ShareeList.php',
         'OCA\\DAV\\Connector\\Sabre\\SharesPlugin' => __DIR__ . '/..' . '/../lib/Connector/Sabre/SharesPlugin.php',
         'OCA\\DAV\\Connector\\Sabre\\TagList' => __DIR__ . '/..' . '/../lib/Connector/Sabre/TagList.php',
         'OCA\\DAV\\Connector\\Sabre\\TagsPlugin' => __DIR__ . '/..' . '/../lib/Connector/Sabre/TagsPlugin.php',
@@ -162,6 +179,7 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\Direct\\DirectHome' => __DIR__ . '/..' . '/../lib/Direct/DirectHome.php',
         'OCA\\DAV\\Direct\\Server' => __DIR__ . '/..' . '/../lib/Direct/Server.php',
         'OCA\\DAV\\Direct\\ServerFactory' => __DIR__ . '/..' . '/../lib/Direct/ServerFactory.php',
+        'OCA\\DAV\\Exception\\UnsupportedLimitOnInitialSyncException' => __DIR__ . '/..' . '/../lib/Exception/UnsupportedLimitOnInitialSyncException.php',
         'OCA\\DAV\\Files\\BrowserErrorPagePlugin' => __DIR__ . '/..' . '/../lib/Files/BrowserErrorPagePlugin.php',
         'OCA\\DAV\\Files\\FileSearchBackend' => __DIR__ . '/..' . '/../lib/Files/FileSearchBackend.php',
         'OCA\\DAV\\Files\\FilesHome' => __DIR__ . '/..' . '/../lib/Files/FilesHome.php',
@@ -177,6 +195,7 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\Migration\\FixBirthdayCalendarComponent' => __DIR__ . '/..' . '/../lib/Migration/FixBirthdayCalendarComponent.php',
         'OCA\\DAV\\Migration\\RefreshWebcalJobRegistrar' => __DIR__ . '/..' . '/../lib/Migration/RefreshWebcalJobRegistrar.php',
         'OCA\\DAV\\Migration\\RegenerateBirthdayCalendars' => __DIR__ . '/..' . '/../lib/Migration/RegenerateBirthdayCalendars.php',
+        'OCA\\DAV\\Migration\\RegisterBuildReminderIndexBackgroundJob' => __DIR__ . '/..' . '/../lib/Migration/RegisterBuildReminderIndexBackgroundJob.php',
         'OCA\\DAV\\Migration\\RemoveClassifiedEventActivity' => __DIR__ . '/..' . '/../lib/Migration/RemoveClassifiedEventActivity.php',
         'OCA\\DAV\\Migration\\RemoveOrphanEventsAndContacts' => __DIR__ . '/..' . '/../lib/Migration/RemoveOrphanEventsAndContacts.php',
         'OCA\\DAV\\Migration\\Version1004Date20170825134824' => __DIR__ . '/..' . '/../lib/Migration/Version1004Date20170825134824.php',
@@ -193,11 +212,15 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\Migration\\Version1008Date20181105110300' => __DIR__ . '/..' . '/../lib/Migration/Version1008Date20181105110300.php',
         'OCA\\DAV\\Migration\\Version1008Date20181105112049' => __DIR__ . '/..' . '/../lib/Migration/Version1008Date20181105112049.php',
         'OCA\\DAV\\Migration\\Version1008Date20181114084440' => __DIR__ . '/..' . '/../lib/Migration/Version1008Date20181114084440.php',
+        'OCA\\DAV\\Migration\\Version1011Date20190725113607' => __DIR__ . '/..' . '/../lib/Migration/Version1011Date20190725113607.php',
+        'OCA\\DAV\\Migration\\Version1011Date20190806104428' => __DIR__ . '/..' . '/../lib/Migration/Version1011Date20190806104428.php',
+        'OCA\\DAV\\Migration\\Version1012Date20190808122342' => __DIR__ . '/..' . '/../lib/Migration/Version1012Date20190808122342.php',
         'OCA\\DAV\\Provisioning\\Apple\\AppleProvisioningNode' => __DIR__ . '/..' . '/../lib/Provisioning/Apple/AppleProvisioningNode.php',
         'OCA\\DAV\\Provisioning\\Apple\\AppleProvisioningPlugin' => __DIR__ . '/..' . '/../lib/Provisioning/Apple/AppleProvisioningPlugin.php',
         'OCA\\DAV\\RootCollection' => __DIR__ . '/..' . '/../lib/RootCollection.php',
         'OCA\\DAV\\Server' => __DIR__ . '/..' . '/../lib/Server.php',
         'OCA\\DAV\\Settings\\CalDAVSettings' => __DIR__ . '/..' . '/../lib/Settings/CalDAVSettings.php',
+        'OCA\\DAV\\Storage\\PublicOwnerWrapper' => __DIR__ . '/..' . '/../lib/Storage/PublicOwnerWrapper.php',
         'OCA\\DAV\\SystemTag\\SystemTagMappingNode' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagMappingNode.php',
         'OCA\\DAV\\SystemTag\\SystemTagNode' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagNode.php',
         'OCA\\DAV\\SystemTag\\SystemTagPlugin' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagPlugin.php',
@@ -205,6 +228,7 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\SystemTag\\SystemTagsObjectMappingCollection' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagsObjectMappingCollection.php',
         'OCA\\DAV\\SystemTag\\SystemTagsObjectTypeCollection' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagsObjectTypeCollection.php',
         'OCA\\DAV\\SystemTag\\SystemTagsRelationsCollection' => __DIR__ . '/..' . '/../lib/SystemTag/SystemTagsRelationsCollection.php',
+        'OCA\\DAV\\Traits\\PrincipalProxyTrait' => __DIR__ . '/..' . '/../lib/Traits/PrincipalProxyTrait.php',
         'OCA\\DAV\\Upload\\AssemblyStream' => __DIR__ . '/..' . '/../lib/Upload/AssemblyStream.php',
         'OCA\\DAV\\Upload\\ChunkingPlugin' => __DIR__ . '/..' . '/../lib/Upload/ChunkingPlugin.php',
         'OCA\\DAV\\Upload\\CleanupService' => __DIR__ . '/..' . '/../lib/Upload/CleanupService.php',

apps/dav/js/settings-admin-caldav.js

@@ -36,3 +36,18 @@ $('#caldavGenerateBirthdayCalendar').change(function() {
 		$.post(OC.generateUrl('/apps/dav/disableBirthdayCalendar'));
 	}
 });
+
+$('#caldavSendRemindersNotifications').change(function() {
+	var val = $(this)[0].checked;
+
+	OCP.AppConfig.setValue('dav', 'sendEventReminders', val ? 'yes' : 'no');
+
+	$('#caldavSendRemindersNotificationsPush').prop('disabled', !val)
+});
+
+$('#caldavSendRemindersNotificationsPush').change(function() {
+	var val = $(this)[0].checked;
+
+	OCP.AppConfig.setValue('dav', 'sendEventRemindersPush', val ? 'yes' : 'no');
+});
+

apps/dav/lib/AppInfo/Application.php

@@ -30,6 +30,13 @@ use OCA\DAV\CalDAV\Activity\Backend;
 use OCA\DAV\CalDAV\Activity\Provider\Event;
 use OCA\DAV\CalDAV\BirthdayService;
 use OCA\DAV\CalDAV\CalendarManager;
+use OCA\DAV\CalDAV\Reminder\Backend as ReminderBackend;
+use OCA\DAV\CalDAV\Reminder\NotificationProvider\AudioProvider;
+use OCA\DAV\CalDAV\Reminder\NotificationProvider\EmailProvider;
+use OCA\DAV\CalDAV\Reminder\NotificationProvider\PushProvider;
+use OCA\DAV\CalDAV\Reminder\NotificationProviderManager;
+use OCA\DAV\CalDAV\Reminder\Notifier;
+use OCA\DAV\CalDAV\Reminder\ReminderService;
 use OCA\DAV\Capabilities;
 use OCA\DAV\CardDAV\ContactsManager;
 use OCA\DAV\CardDAV\PhotoCache;
@@ -43,6 +50,8 @@ use Symfony\Component\EventDispatcher\GenericEvent;
 
 class Application extends App {
 
+	const APP_ID = 'dav';
+
 	/**
 	 * Application constructor.
 	 */
@@ -109,8 +118,7 @@ class Application extends App {
 			}
 		});
 
-		// carddav/caldav sync event setup
-		$listener = function($event) {
+		$birthdayListener = function ($event) {
 			if ($event instanceof GenericEvent) {
 				/** @var BirthdayService $b */
 				$b = $this->getContainer()->query(BirthdayService::class);
@@ -122,9 +130,9 @@ class Application extends App {
 			}
 		};
 
-		$dispatcher->addListener('\OCA\DAV\CardDAV\CardDavBackend::createCard', $listener);
-		$dispatcher->addListener('\OCA\DAV\CardDAV\CardDavBackend::updateCard', $listener);
-		$dispatcher->addListener('\OCA\DAV\CardDAV\CardDavBackend::deleteCard', function($event) {
+		$dispatcher->addListener('\OCA\DAV\CardDAV\CardDavBackend::createCard', $birthdayListener);
+		$dispatcher->addListener('\OCA\DAV\CardDAV\CardDavBackend::updateCard', $birthdayListener);
+		$dispatcher->addListener('\OCA\DAV\CardDAV\CardDavBackend::deleteCard', function ($event) {
 			if ($event instanceof GenericEvent) {
 				/** @var BirthdayService $b */
 				$b = $this->getContainer()->query(BirthdayService::class);
@@ -177,6 +185,11 @@ class Application extends App {
 				$event->getArgument('calendarData'),
 				$event->getArgument('shares')
 			);
+
+			$reminderBackend = $this->getContainer()->query(ReminderBackend::class);
+			$reminderBackend->cleanRemindersForCalendar(
+				$event->getArgument('calendarId')
+			);
 		});
 		$dispatcher->addListener('\OCA\DAV\CalDAV\CalDavBackend::updateShares', function(GenericEvent $event) {
 			/** @var Backend $backend */
@@ -187,6 +200,8 @@ class Application extends App {
 				$event->getArgument('add'),
 				$event->getArgument('remove')
 			);
+
+			// Here we should recalculate if reminders should be sent to new or old sharees
 		});
 
 		$dispatcher->addListener('\OCA\DAV\CalDAV\CalDavBackend::publishCalendar', function(GenericEvent $event) {
@@ -214,6 +229,14 @@ class Application extends App {
 				$event->getArgument('shares'),
 				$event->getArgument('objectData')
 			);
+
+			/** @var ReminderService $reminderBackend */
+			$reminderService = $this->getContainer()->query(ReminderService::class);
+
+			$reminderService->onTouchCalendarObject(
+				$eventName,
+				$event->getArgument('objectData')
+			);
 		};
 		$dispatcher->addListener('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject', $listener);
 		$dispatcher->addListener('\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject', $listener);
@@ -224,4 +247,23 @@ class Application extends App {
 		return $this->getContainer()->query(SyncService::class);
 	}
 
+	public function registerNotifier():void {
+		$this->getContainer()
+			->getServer()
+			->getNotificationManager()
+			->registerNotifierService(Notifier::class);
+	}
+
+	public function registerCalendarReminders():void {
+		try {
+			/** @var NotificationProviderManager $notificationProviderManager */
+			$notificationProviderManager = $this->getContainer()->query(NotificationProviderManager::class);
+			$notificationProviderManager->registerProvider(AudioProvider::class);
+			$notificationProviderManager->registerProvider(EmailProvider::class);
+			$notificationProviderManager->registerProvider(PushProvider::class);
+		} catch(\Exception $ex) {
+			$this->getContainer()->getServer()->getLogger()->logException($ex);
+		}
+	}
+
 }

apps/dav/lib/BackgroundJob/BuildReminderIndexBackgroundJob.php

@@ -0,0 +1,135 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright 2019 Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OCA\DAV\BackgroundJob;
+
+use OCP\BackgroundJob\QueuedJob;
+use OCA\DAV\CalDAV\Reminder\ReminderService;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\BackgroundJob\IJobList;
+use OCP\IDBConnection;
+use OCP\ILogger;
+
+/**
+ * Class BuildReminderIndexBackgroundJob
+ *
+ * @package OCA\DAV\BackgroundJob
+ */
+class BuildReminderIndexBackgroundJob extends QueuedJob {
+
+	/** @var IDBConnection */
+	private $db;
+
+	/** @var ReminderService */
+	private $reminderService;
+
+	/** @var ILogger */
+	private $logger;
+
+	/** @var IJobList */
+	private $jobList;
+
+	/** @var ITimeFactory */
+	private $timeFactory;
+
+	/**
+	 * BuildReminderIndexBackgroundJob constructor.
+	 *
+	 * @param IDBConnection $db
+	 * @param ReminderService $reminderService
+	 * @param ILogger $logger
+	 * @param IJobList $jobList
+	 * @param ITimeFactory $timeFactory
+	 */
+	public function __construct(IDBConnection $db,
+								ReminderService $reminderService,
+								ILogger $logger,
+								IJobList $jobList,
+								ITimeFactory $timeFactory) {
+		parent::__construct($timeFactory);
+		$this->db = $db;
+		$this->reminderService = $reminderService;
+		$this->logger = $logger;
+		$this->jobList = $jobList;
+		$this->timeFactory = $timeFactory;
+	}
+
+	/**
+	 * @param $arguments
+	 */
+	public function run($arguments) {
+		$offset = (int) $arguments['offset'];
+		$stopAt = (int) $arguments['stopAt'];
+
+		$this->logger->info('Building calendar reminder index (' . $offset .'/' . $stopAt . ')');
+
+		$offset = $this->buildIndex($offset, $stopAt);
+
+		if ($offset >= $stopAt) {
+			$this->logger->info('Building calendar reminder index done');
+		} else {
+			$this->jobList->add(self::class, [
+				'offset' => $offset,
+				'stopAt' => $stopAt
+			]);
+			$this->logger->info('Scheduled a new BuildReminderIndexBackgroundJob with offset ' . $offset);
+		}
+	}
+
+	/**
+	 * @param int $offset
+	 * @param int $stopAt
+	 * @return int
+	 */
+	private function buildIndex(int $offset, int $stopAt):int {
+		$startTime = $this->timeFactory->getTime();
+
+		$query = $this->db->getQueryBuilder();
+		$query->select('*')
+			->from('calendarobjects')
+			->where($query->expr()->lte('id', $query->createNamedParameter($stopAt)))
+			->andWhere($query->expr()->gt('id', $query->createNamedParameter($offset)))
+			->orderBy('id', 'ASC');
+
+		$stmt = $query->execute();
+		while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+			$offset = $row['id'];
+			if (is_resource($row['calendardata'])) {
+				$row['calendardata'] = stream_get_contents($row['calendardata']);
+			}
+			$row['component'] = $row['componenttype'];
+
+			try {
+				$this->reminderService->onTouchCalendarObject('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject', $row);
+			} catch(\Exception $ex) {
+				$this->logger->logException($ex);
+			}
+
+			if (($this->timeFactory->getTime() - $startTime) > 15) {
+				return $offset;
+			}
+		}
+
+		return $stopAt;
+	}
+}

apps/dav/lib/BackgroundJob/EventReminderJob.php

@@ -0,0 +1,64 @@
+<?php
+/**
+ * @author Thomas Citharel <tcit@tcit.fr>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\BackgroundJob;
+
+use OC\BackgroundJob\TimedJob;
+use OCA\DAV\CalDAV\Reminder\ReminderService;
+use OCP\IConfig;
+
+class EventReminderJob extends TimedJob {
+
+	/** @var ReminderService */
+	private $reminderService;
+
+	/** @var IConfig */
+	private $config;
+
+	/**
+	 * EventReminderJob constructor.
+	 *
+	 * @param ReminderService $reminderService
+	 * @param IConfig $config
+	 */
+	public function __construct(ReminderService $reminderService, IConfig $config) {
+		$this->reminderService = $reminderService;
+		$this->config = $config;
+		/** Run every 5 minutes */
+		$this->setInterval(5);
+	}
+
+	/**
+	 * @param $arg
+	 * @throws \OCA\DAV\CalDAV\Reminder\NotificationProvider\ProviderNotAvailableException
+	 * @throws \OCA\DAV\CalDAV\Reminder\NotificationTypeDoesNotExistException
+	 * @throws \OC\User\NoUserException
+	 */
+	public function run($arg):void {
+		if ($this->config->getAppValue('dav', 'sendEventReminders', 'yes') !== 'yes') {
+			return;
+		}
+
+		if ($this->config->getAppValue('dav', 'sendEventRemindersMode', 'backgroundjob') !== 'backgroundjob') {
+			return;
+		}
+
+		$this->reminderService->processReminders();
+	}
+}

apps/dav/lib/BackgroundJob/RefreshWebcalJob.php

@@ -4,6 +4,8 @@ declare(strict_types=1);
  * @copyright 2018 Georg Ehrke <oc.list@georgehrke.com>
  *
  * @author Georg Ehrke <oc.list@georgehrke.com>
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ * @author Thomas Citharel <nextcloud@tcit.fr>
  *
  * @license GNU AGPL version 3 or any later version
  *
@@ -23,35 +25,25 @@ declare(strict_types=1);
  */
 namespace OCA\DAV\BackgroundJob;
 
-use GuzzleHttp\HandlerStack;
-use GuzzleHttp\Middleware;
+use DateInterval;
 use OC\BackgroundJob\Job;
-use OCA\DAV\CalDAV\CalDavBackend;
+use OCA\DAV\CalDAV\WebcalCaching\RefreshWebcalService;
 use OCP\AppFramework\Utility\ITimeFactory;
-use OCP\Http\Client\IClientService;
 use OCP\IConfig;
 use OCP\ILogger;
-use Psr\Http\Message\RequestInterface;
-use Psr\Http\Message\ResponseInterface;
-use Sabre\DAV\Exception\BadRequest;
-use Sabre\DAV\PropPatch;
-use Sabre\DAV\Xml\Property\Href;
-use Sabre\VObject\Component;
 use Sabre\VObject\DateTimeParser;
 use Sabre\VObject\InvalidDataException;
-use Sabre\VObject\ParseException;
-use Sabre\VObject\Reader;
-use Sabre\VObject\Splitter\ICalendar;
 
 class RefreshWebcalJob extends Job {
 
-	/** @var CalDavBackend */
-	private $calDavBackend;
+	/**
+	 * @var RefreshWebcalService
+	 */
+	private $refreshWebcalService;
 
-	/** @var IClientService */
-	private $clientService;
-
-	/** @var IConfig */
+	/**
+	 * @var IConfig
+	 */
 	private $config;
 
 	/** @var ILogger */
@@ -60,21 +52,16 @@ class RefreshWebcalJob extends Job {
 	/** @var ITimeFactory */
 	private $timeFactory;
 
-	/** @var array */
-	private $subscription;
-
 	/**
 	 * RefreshWebcalJob constructor.
 	 *
-	 * @param CalDavBackend $calDavBackend
-	 * @param IClientService $clientService
+	 * @param RefreshWebcalService $refreshWebcalService
 	 * @param IConfig $config
 	 * @param ILogger $logger
 	 * @param ITimeFactory $timeFactory
 	 */
-	public function __construct(CalDavBackend $calDavBackend, IClientService $clientService, IConfig $config, ILogger $logger, ITimeFactory $timeFactory) {
-		$this->calDavBackend = $calDavBackend;
-		$this->clientService = $clientService;
+	public function __construct(RefreshWebcalService $refreshWebcalService, IConfig $config, ILogger $logger, ITimeFactory $timeFactory) {
+		$this->refreshWebcalService = $refreshWebcalService;
 		$this->config = $config;
 		$this->logger = $logger;
 		$this->timeFactory = $timeFactory;
@@ -86,18 +73,22 @@ class RefreshWebcalJob extends Job {
 	 * @inheritdoc
 	 */
 	public function execute($jobList, ILogger $logger = null) {
-		$subscription = $this->getSubscription($this->argument['principaluri'], $this->argument['uri']);
+		$subscription = $this->refreshWebcalService->getSubscription($this->argument['principaluri'], $this->argument['uri']);
 		if (!$subscription) {
 			return;
 		}
 
+		$this->fixSubscriptionRowTyping($subscription);
+
 		// if no refresh rate was configured, just refresh once a week
+		$defaultRefreshRate = $this->config->getAppValue('dav', 'calendarSubscriptionRefreshRate', 'P1W');
+		$refreshRate = $subscription[RefreshWebcalService::REFRESH_RATE] ?? $defaultRefreshRate;
+
 		$subscriptionId = $subscription['id'];
-		$refreshrate = $subscription['refreshrate'] ?? 'P1W';
 
 		try {
-			/** @var \DateInterval $dateInterval */
-			$dateInterval = DateTimeParser::parseDuration($refreshrate);
+			/** @var DateInterval $dateInterval */
+			$dateInterval = DateTimeParser::parseDuration($refreshRate);
 		} catch(InvalidDataException $ex) {
 			$this->logger->logException($ex);
 			$this->logger->warning("Subscription $subscriptionId could not be refreshed, refreshrate in database is invalid");
@@ -116,243 +107,16 @@ class RefreshWebcalJob extends Job {
 	 * @param array $argument
 	 */
 	protected function run($argument) {
-		$subscription = $this->getSubscription($argument['principaluri'], $argument['uri']);
-		$mutations = [];
-		if (!$subscription) {
-			return;
-		}
-
-		$webcalData = $this->queryWebcalFeed($subscription, $mutations);
-		if (!$webcalData) {
-			return;
-		}
-
-		$stripTodos = $subscription['striptodos'] ?? 1;
-		$stripAlarms = $subscription['stripalarms'] ?? 1;
-		$stripAttachments = $subscription['stripattachments'] ?? 1;
-
-		try {
-			$splitter = new ICalendar($webcalData, Reader::OPTION_FORGIVING);
-
-			// we wait with deleting all outdated events till we parsed the new ones
-			// in case the new calendar is broken and `new ICalendar` throws a ParseException
-			// the user will still see the old data
-			$this->calDavBackend->purgeAllCachedEventsForSubscription($subscription['id']);
-
-			while ($vObject = $splitter->getNext()) {
-				/** @var Component $vObject */
-				$uid = null;
-				$compName = null;
-
-				foreach ($vObject->getComponents() as $component) {
-					if ($component->name === 'VTIMEZONE') {
-						continue;
-					}
-
-					$uid = $component->{'UID'}->getValue();
-					$compName = $component->name;
-
-					if ($stripAlarms) {
-						unset($component->{'VALARM'});
-					}
-					if ($stripAttachments) {
-						unset($component->{'ATTACH'});
-					}
-				}
-
-				if ($stripTodos && $compName === 'VTODO') {
-					continue;
-				}
-
-				$uri = $uid . '.ics';
-				$calendarData = $vObject->serialize();
-				try {
-					$this->calDavBackend->createCalendarObject($subscription['id'], $uri, $calendarData, CalDavBackend::CALENDAR_TYPE_SUBSCRIPTION);
-				} catch(BadRequest $ex) {
-					$this->logger->logException($ex);
-				}
-			}
-
-			$newRefreshRate = $this->checkWebcalDataForRefreshRate($subscription, $webcalData);
-			if ($newRefreshRate) {
-				$mutations['{http://apple.com/ns/ical/}refreshrate'] = $newRefreshRate;
-			}
-
-			$this->updateSubscription($subscription, $mutations);
-		} catch(ParseException $ex) {
-			$subscriptionId = $subscription['id'];
-
-			$this->logger->logException($ex);
-			$this->logger->warning("Subscription $subscriptionId could not be refreshed due to a parsing error");
-		}
-	}
-
-	/**
-	 * gets webcal feed from remote server
-	 *
-	 * @param array $subscription
-	 * @param array &$mutations
-	 * @return null|string
-	 */
-	private function queryWebcalFeed(array $subscription, array &$mutations) {
-		$client = $this->clientService->newClient();
-
-		$didBreak301Chain = false;
-		$latestLocation = null;
-
-		$handlerStack = HandlerStack::create();
-		$handlerStack->push(Middleware::mapRequest(function (RequestInterface $request) {
-			return $request
-				->withHeader('Accept', 'text/calendar, application/calendar+json, application/calendar+xml')
-				->withHeader('User-Agent', 'Nextcloud Webcal Crawler');
-		}));
-		$handlerStack->push(Middleware::mapResponse(function(ResponseInterface $response) use (&$didBreak301Chain, &$latestLocation) {
-			if (!$didBreak301Chain) {
-				if ($response->getStatusCode() !== 301) {
-					$didBreak301Chain = true;
-				} else {
-					$latestLocation = $response->getHeader('Location');
-				}
-			}
-			return $response;
-		}));
-
-		$allowLocalAccess = $this->config->getAppValue('dav', 'webcalAllowLocalAccess', 'no');
-		$subscriptionId = $subscription['id'];
-		$url = $this->cleanURL($subscription['source']);
-		if ($url === null) {
-			return null;
-		}
-
-		if ($allowLocalAccess !== 'yes') {
-			$host = strtolower(parse_url($url, PHP_URL_HOST));
-			// remove brackets from IPv6 addresses
-			if (strpos($host, '[') === 0 && substr($host, -1) === ']') {
-				$host = substr($host, 1, -1);
-			}
-
-			// Disallow localhost and local network
-			if ($host === 'localhost' || substr($host, -6) === '.local' || substr($host, -10) === '.localhost') {
-				$this->logger->warning("Subscription $subscriptionId was not refreshed because it violates local access rules");
-				return null;
-			}
-
-			// Disallow hostname only
-			if (substr_count($host, '.') === 0) {
-				$this->logger->warning("Subscription $subscriptionId was not refreshed because it violates local access rules");
-				return null;
-			}
-
-			if ((bool)filter_var($host, FILTER_VALIDATE_IP) && !filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
-				$this->logger->warning("Subscription $subscriptionId was not refreshed because it violates local access rules");
-				return null;
-			}
-
-			// Also check for IPv6 IPv4 nesting, because that's not covered by filter_var
-			if ((bool)filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) && substr_count($host, '.') > 0) {
-				$delimiter = strrpos($host, ':'); // Get last colon
-				$ipv4Address = substr($host, $delimiter + 1);
-
-				if (!filter_var($ipv4Address, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
-					$this->logger->warning("Subscription $subscriptionId was not refreshed because it violates local access rules");
-					return null;
-				}
-			}
-		}
-
-		try {
-			$params = [
-				'allow_redirects' => [
-					'redirects' => 10
-				],
-				'handler' => $handlerStack,
-			];
-
-			$user = parse_url($subscription['source'], PHP_URL_USER);
-			$pass = parse_url($subscription['source'], PHP_URL_PASS);
-			if ($user !== null && $pass !== null) {
-				$params['auth'] = [$user, $pass];
-			}
-
-			$response = $client->get($url, $params);
-			$body = $response->getBody();
-
-			if ($latestLocation) {
-				$mutations['{http://calendarserver.org/ns/}source'] = new Href($latestLocation);
-			}
-
-			$contentType = $response->getHeader('Content-Type');
-			$contentType = explode(';', $contentType, 2)[0];
-			switch($contentType) {
-				case 'application/calendar+json':
-					try {
-						$jCalendar = Reader::readJson($body, Reader::OPTION_FORGIVING);
-					} catch(\Exception $ex) {
-						// In case of a parsing error return null
-						$this->logger->debug("Subscription $subscriptionId could not be parsed");
-						return null;
-					}
-					return $jCalendar->serialize();
-
-				case 'application/calendar+xml':
-					try {
-						$xCalendar = Reader::readXML($body);
-					} catch(\Exception $ex) {
-						// In case of a parsing error return null
-						$this->logger->debug("Subscription $subscriptionId could not be parsed");
-						return null;
-					}
-					return $xCalendar->serialize();
-
-				case 'text/calendar':
-				default:
-					try {
-						$vCalendar = Reader::read($body);
-					} catch(\Exception $ex) {
-						// In case of a parsing error return null
-						$this->logger->debug("Subscription $subscriptionId could not be parsed");
-						return null;
-					}
-					return $vCalendar->serialize();
-			}
-		} catch(\Exception $ex) {
-			$this->logger->logException($ex);
-			$this->logger->warning("Subscription $subscriptionId could not be refreshed due to a network error");
-
-			return null;
-		}
-	}
-
-	/**
-	 * loads subscription from backend
-	 *
-	 * @param string $principalUri
-	 * @param string $uri
-	 * @return array|null
-	 */
-	private function getSubscription(string $principalUri, string $uri) {
-		$subscriptions = array_values(array_filter(
-			$this->calDavBackend->getSubscriptionsForUser($principalUri),
-			function($sub) use ($uri) {
-				return $sub['uri'] === $uri;
-			}
-		));
-
-		if (\count($subscriptions) === 0) {
-			return null;
-		}
-
-		$this->subscription = $subscriptions[0];
-		return $this->subscription;
+		$this->refreshWebcalService->refreshSubscription($argument['principaluri'], $argument['uri']);
 	}
 
 	/**
 	 * get total number of seconds from DateInterval object
 	 *
-	 * @param \DateInterval $interval
+	 * @param DateInterval $interval
 	 * @return int
 	 */
-	private function getIntervalFromDateInterval(\DateInterval $interval):int {
+	private function getIntervalFromDateInterval(DateInterval $interval):int {
 		return $interval->s
 			+ ($interval->i * 60)
 			+ ($interval->h * 60 * 60)
@@ -362,99 +126,23 @@ class RefreshWebcalJob extends Job {
 	}
 
 	/**
-	 * check if:
-	 *  - current subscription stores a refreshrate
-	 *  - the webcal feed suggests a refreshrate
-	 *  - return suggested refreshrate if user didn't set a custom one
+	 * Fixes types of rows
 	 *
-	 * @param array $subscription
-	 * @param string $webcalData
-	 * @return string|null
+	 * @param array $row
 	 */
-	private function checkWebcalDataForRefreshRate($subscription, $webcalData) {
-		// if there is no refreshrate stored in the database, check the webcal feed
-		// whether it suggests any refresh rate and store that in the database
-		if (isset($subscription['refreshrate']) && $subscription['refreshrate'] !== null) {
-			return null;
+	private function fixSubscriptionRowTyping(array &$row):void {
+		$forceInt = [
+			'id',
+			'lastmodified',
+			RefreshWebcalService::STRIP_ALARMS,
+			RefreshWebcalService::STRIP_ATTACHMENTS,
+			RefreshWebcalService::STRIP_TODOS,
+		];
+
+		foreach($forceInt as $column) {
+			if (isset($row[$column])) {
+				$row[$column] = (int) $row[$column];
+			}
 		}
-
-		/** @var Component\VCalendar $vCalendar */
-		$vCalendar = Reader::read($webcalData);
-
-		$newRefreshrate = null;
-		if (isset($vCalendar->{'X-PUBLISHED-TTL'})) {
-			$newRefreshrate = $vCalendar->{'X-PUBLISHED-TTL'}->getValue();
-		}
-		if (isset($vCalendar->{'REFRESH-INTERVAL'})) {
-			$newRefreshrate = $vCalendar->{'REFRESH-INTERVAL'}->getValue();
-		}
-
-		if (!$newRefreshrate) {
-			return null;
-		}
-
-		// check if new refresh rate is even valid
-		try {
-			DateTimeParser::parseDuration($newRefreshrate);
-		} catch(InvalidDataException $ex) {
-			return null;
-		}
-
-		return $newRefreshrate;
-	}
-
-	/**
-	 * update subscription stored in database
-	 * used to set:
-	 *  - refreshrate
-	 *  - source
-	 *
-	 * @param array $subscription
-	 * @param array $mutations
-	 */
-	private function updateSubscription(array $subscription, array $mutations) {
-		if (empty($mutations)) {
-			return;
-		}
-
-		$propPatch = new PropPatch($mutations);
-		$this->calDavBackend->updateSubscription($subscription['id'], $propPatch);
-		$propPatch->commit();
-	}
-
-	/**
-	 * This method will strip authentication information and replace the
-	 * 'webcal' or 'webcals' protocol scheme
-	 *
-	 * @param string $url
-	 * @return string|null
-	 */
-	private function cleanURL(string $url) {
-		$parsed = parse_url($url);
-		if ($parsed === false) {
-			return null;
-		}
-
-		if (isset($parsed['scheme']) && $parsed['scheme'] === 'http') {
-			$scheme = 'http';
-		} else {
-			$scheme = 'https';
-		}
-
-		$host = $parsed['host'] ?? '';
-		$port = isset($parsed['port']) ? ':' . $parsed['port'] : '';
-		$path = $parsed['path'] ?? '';
-		$query = isset($parsed['query']) ? '?' . $parsed['query'] : '';
-		$fragment = isset($parsed['fragment']) ? '#' . $parsed['fragment'] : '';
-
-		$cleanURL = "$scheme://$host$port$path$query$fragment";
-		// parse_url is giving some weird results if no url and no :// is given,
-		// so let's test the url again
-		$parsedClean = parse_url($cleanURL);
-		if ($parsedClean === false || !isset($parsedClean['host'])) {
-			return null;
-		}
-
-		return $cleanURL;
 	}
 }

apps/dav/lib/BackgroundJob/UpdateCalendarResourcesRoomsBackgroundJob.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * @copyright 2018, Georg Ehrke <oc.list@georgehrke.com>
+ * @copyright 2019, Georg Ehrke <oc.list@georgehrke.com>
  *
  * @author Georg Ehrke <oc.list@georgehrke.com>
  *
@@ -26,6 +26,8 @@ namespace OCA\DAV\BackgroundJob;
 use OC\BackgroundJob\TimedJob;
 use OCA\DAV\CalDAV\CalDavBackend;
 use OCP\Calendar\BackendTemporarilyUnavailableException;
+use OCP\Calendar\IMetadataProvider;
+use OCP\Calendar\Resource\IBackend as IResourceBackend;
 use OCP\Calendar\Resource\IManager as IResourceManager;
 use OCP\Calendar\Resource\IResource;
 use OCP\Calendar\Room\IManager as IRoomManager;
@@ -41,23 +43,11 @@ class UpdateCalendarResourcesRoomsBackgroundJob extends TimedJob {
 	private $roomManager;
 
 	/** @var IDBConnection */
-	private $db;
+	private $dbConnection;
 
 	/** @var CalDavBackend */
 	private $calDavBackend;
 
-	/** @var string */
-	private $resourceDbTable;
-
-	/** @var string */
-	private $resourcePrincipalUri;
-
-	/** @var string */
-	private $roomDbTable;
-
-	/** @var string */
-	private $roomPrincipalUri;
-
 	/**
 	 * UpdateCalendarResourcesRoomsBackgroundJob constructor.
 	 *
@@ -66,16 +56,14 @@ class UpdateCalendarResourcesRoomsBackgroundJob extends TimedJob {
 	 * @param IDBConnection $dbConnection
 	 * @param CalDavBackend $calDavBackend
 	 */
-	public function __construct(IResourceManager $resourceManager, IRoomManager $roomManager,
-								IDBConnection $dbConnection, CalDavBackend $calDavBackend) {
+	public function __construct(IResourceManager $resourceManager,
+								IRoomManager $roomManager,
+								IDBConnection $dbConnection,
+								CalDavBackend $calDavBackend) {
 		$this->resourceManager = $resourceManager;
 		$this->roomManager = $roomManager;
-		$this->db = $dbConnection;
+		$this->dbConnection = $dbConnection;
 		$this->calDavBackend = $calDavBackend;
-		$this->resourceDbTable = 'calendar_resources';
-		$this->resourcePrincipalUri = 'principals/calendar-resources';
-		$this->roomDbTable = 'calendar_rooms';
-		$this->roomPrincipalUri = 'principals/calendar-rooms';
 
 		// run once an hour
 		$this->setInterval(60 * 60);
@@ -84,211 +72,132 @@ class UpdateCalendarResourcesRoomsBackgroundJob extends TimedJob {
 	/**
 	 * @param $argument
 	 */
-	public function run($argument) {
-		$this->runResources();
-		$this->runRooms();
+	public function run($argument):void {
+		$this->runForBackend(
+			$this->resourceManager,
+			'calendar_resources',
+			'calendar_resources_md',
+			'resource_id',
+			'principals/calendar-resources'
+		);
+		$this->runForBackend(
+			$this->roomManager,
+			'calendar_rooms',
+			'calendar_rooms_md',
+			'room_id',
+			'principals/calendar-rooms'
+		);
 	}
 
 	/**
-	 * run timed job for resources
-	 */
-	private function runResources() {
-		$resourceBackends = $this->resourceManager->getBackends();
-		$cachedResources = $this->getCached($this->resourceDbTable);
-		$cachedResourceIds = $this->getCachedResourceIds($cachedResources);
-
-		$remoteResourceIds = [];
-		foreach($resourceBackends as $resourceBackend) {
-			try {
-				$remoteResourceIds[$resourceBackend->getBackendIdentifier()] =
-					$resourceBackend->listAllResources();
-			} catch(BackendTemporarilyUnavailableException $ex) {
-				// If the backend is temporarily unavailable
-				// ignore this backend in this execution
-				unset($cachedResourceIds[$resourceBackend->getBackendIdentifier()]);
-			}
-		}
-
-		$sortedResources = $this->sortByNewDeletedExisting($cachedResourceIds, $remoteResourceIds);
-
-		foreach($sortedResources['new'] as $backendId => $newResources) {
-			foreach ($newResources as $newResource) {
-				$backend = $this->resourceManager->getBackend($backendId);
-				if ($backend === null) {
-					continue;
-				}
-
-				$resource = $backend->getResource($newResource);
-				$this->addToCache($this->resourceDbTable, $resource);
-			}
-		}
-		foreach($sortedResources['deleted'] as $backendId => $deletedResources) {
-			foreach ($deletedResources as $deletedResource) {
-				$this->deleteFromCache($this->resourceDbTable,
-					$this->resourcePrincipalUri, $backendId, $deletedResource);
-			}
-		}
-		foreach($sortedResources['edited'] as $backendId => $editedResources) {
-			foreach ($editedResources as $editedResource) {
-				$backend = $this->resourceManager->getBackend($backendId);
-				if ($backend === null) {
-					continue;
-				}
-
-				$resource = $backend->getResource($editedResource);
-				$this->updateCache($this->resourceDbTable, $resource);
-			}
-		}
-	}
-
-	/**
-	 * run timed job for rooms
-	 */
-	private function runRooms() {
-		$roomBackends = $this->roomManager->getBackends();
-		$cachedRooms = $this->getCached($this->roomDbTable);
-		$cachedRoomIds = $this->getCachedRoomIds($cachedRooms);
-
-		$remoteRoomIds = [];
-		foreach($roomBackends as $roomBackend) {
-			try {
-				$remoteRoomIds[$roomBackend->getBackendIdentifier()] =
-					$roomBackend->listAllRooms();
-			} catch(BackendTemporarilyUnavailableException $ex) {
-				// If the backend is temporarily unavailable
-				// ignore this backend in this execution
-				unset($cachedRoomIds[$roomBackend->getBackendIdentifier()]);
-			}
-		}
-
-		$sortedRooms = $this->sortByNewDeletedExisting($cachedRoomIds, $remoteRoomIds);
-
-		foreach($sortedRooms['new'] as $backendId => $newRooms) {
-			foreach ($newRooms as $newRoom) {
-				$backend = $this->roomManager->getBackend($backendId);
-				if ($backend === null) {
-					continue;
-				}
-
-				$resource = $backend->getRoom($newRoom);
-				$this->addToCache($this->roomDbTable, $resource);
-			}
-		}
-		foreach($sortedRooms['deleted'] as $backendId => $deletedRooms) {
-			foreach ($deletedRooms as $deletedRoom) {
-				$this->deleteFromCache($this->roomDbTable,
-					$this->roomPrincipalUri, $backendId, $deletedRoom);
-			}
-		}
-		foreach($sortedRooms['edited'] as $backendId => $editedRooms) {
-			foreach ($editedRooms as $editedRoom) {
-				$backend = $this->roomManager->getBackend($backendId);
-				if ($backend === null) {
-					continue;
-				}
-
-				$resource = $backend->getRoom($editedRoom);
-				$this->updateCache($this->roomDbTable, $resource);
-			}
-		}
-	}
-
-	/**
-	 * get cached db rows for resources / rooms
-	 * @param string $tableName
-	 * @return array
-	 */
-	private function getCached($tableName):array {
-		$query = $this->db->getQueryBuilder();
-		$query->select('*')->from($tableName);
-
-		$rows = [];
-		$stmt = $query->execute();
-		while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			$rows[] = $row;
-		}
-
-		return $rows;
-	}
-
-	/**
-	 * @param array $cachedResources
-	 * @return array
-	 */
-	private function getCachedResourceIds(array $cachedResources):array {
-		$cachedResourceIds = [];
-		foreach ($cachedResources as $cachedResource) {
-			if (!isset($cachedResourceIds[$cachedResource['backend_id']])) {
-				$cachedResourceIds[$cachedResource['backend_id']] = [];
-			}
-
-			$cachedResourceIds[$cachedResource['backend_id']][] =
-				$cachedResource['resource_id'];
-		}
-
-		return $cachedResourceIds;
-	}
-
-	/**
-	 * @param array $cachedRooms
-	 * @return array
-	 */
-	private function getCachedRoomIds(array $cachedRooms):array {
-		$cachedRoomIds = [];
-		foreach ($cachedRooms as $cachedRoom) {
-			if (!isset($cachedRoomIds[$cachedRoom['backend_id']])) {
-				$cachedRoomIds[$cachedRoom['backend_id']] = [];
-			}
-
-			$cachedRoomIds[$cachedRoom['backend_id']][] =
-				$cachedRoom['resource_id'];
-		}
-
-		return $cachedRoomIds;
-	}
-
-	/**
-	 * sort list of ids by whether they appear only in the backend /
-	 * only in the cache / in both
+	 * Run background-job for one specific backendManager
+	 * either ResourceManager or RoomManager
 	 *
-	 * @param array $cached
-	 * @param array $remote
-	 * @return array
+	 * @param IResourceManager|IRoomManager $backendManager
+	 * @param string $dbTable
+	 * @param string $dbTableMetadata
+	 * @param string $foreignKey
+	 * @param string $principalPrefix
 	 */
-	private function sortByNewDeletedExisting(array $cached, array $remote):array {
-		$sorted = [
-			'new' => [],
-			'deleted' => [],
-			'edited' => [],
-		];
+	private function runForBackend($backendManager,
+								   string $dbTable,
+								   string $dbTableMetadata,
+								   string $foreignKey,
+								   string $principalPrefix):void {
+		$backends = $backendManager->getBackends();
 
-		$backendIds = array_merge(array_keys($cached), array_keys($remote));
-		foreach($backendIds as $backendId) {
-			if (!isset($cached[$backendId])) {
-				$sorted['new'][$backendId] = $remote[$backendId];
-			} elseif (!isset($remote[$backendId])) {
-				$sorted['deleted'][$backendId] = $cached[$backendId];
-			} else {
-				$sorted['new'][$backendId] = array_diff($remote[$backendId], $cached[$backendId]);
-				$sorted['deleted'][$backendId] = array_diff($cached[$backendId], $remote[$backendId]);
-				$sorted['edited'][$backendId] = array_intersect($remote[$backendId], $cached[$backendId]);
+		foreach($backends as $backend) {
+			$backendId = $backend->getBackendIdentifier();
+
+			try {
+				if ($backend instanceof IResourceBackend) {
+					$list = $backend->listAllResources();
+				} else {
+					$list = $backend->listAllRooms();
+				}
+			} catch(BackendTemporarilyUnavailableException $ex) {
+				continue;
+			}
+
+			$cachedList = $this->getAllCachedByBackend($dbTable, $backendId);
+			$newIds = array_diff($list, $cachedList);
+			$deletedIds = array_diff($cachedList, $list);
+			$editedIds = array_intersect($list, $cachedList);
+
+			foreach($newIds as $newId) {
+				try {
+					if ($backend instanceof IResourceBackend) {
+						$resource = $backend->getResource($newId);
+					} else {
+						$resource = $backend->getRoom($newId);
+					}
+
+					$metadata = [];
+					if ($resource instanceof IMetadataProvider) {
+						$metadata = $this->getAllMetadataOfBackend($resource);
+					}
+				} catch(BackendTemporarilyUnavailableException $ex) {
+					continue;
+				}
+
+				$id = $this->addToCache($dbTable, $backendId, $resource);
+				$this->addMetadataToCache($dbTableMetadata, $foreignKey, $id, $metadata);
+				// we don't create the calendar here, it is created lazily
+				// when an event is actually scheduled with this resource / room
+			}
+
+			foreach($deletedIds as $deletedId) {
+				$id = $this->getIdForBackendAndResource($dbTable, $backendId, $deletedId);
+				$this->deleteFromCache($dbTable, $id);
+				$this->deleteMetadataFromCache($dbTableMetadata, $foreignKey, $id);
+
+				$principalName = implode('-', [$backendId, $deletedId]);
+				$this->deleteCalendarDataForResource($principalPrefix, $principalName);
+			}
+
+			foreach($editedIds as $editedId) {
+				$id = $this->getIdForBackendAndResource($dbTable, $backendId, $editedId);
+
+				try {
+					if ($backend instanceof IResourceBackend) {
+						$resource = $backend->getResource($editedId);
+					} else {
+						$resource = $backend->getRoom($editedId);
+					}
+
+					$metadata = [];
+					if ($resource instanceof IMetadataProvider) {
+						$metadata = $this->getAllMetadataOfBackend($resource);
+					}
+				} catch(BackendTemporarilyUnavailableException $ex) {
+					continue;
+				}
+
+				$this->updateCache($dbTable, $id, $resource);
+
+				if ($resource instanceof IMetadataProvider) {
+					$cachedMetadata = $this->getAllMetadataOfCache($dbTableMetadata, $foreignKey, $id);
+					$this->updateMetadataCache($dbTableMetadata, $foreignKey, $id, $metadata, $cachedMetadata);
+				}
 			}
 		}
-
-		return $sorted;
 	}
 
 	/**
 	 * add entry to cache that exists remotely but not yet in cache
 	 *
 	 * @param string $table
+	 * @param string $backendId
 	 * @param IResource|IRoom $remote
+	 * @return int Insert id
 	 */
-	private function addToCache($table, $remote) {
-		$query = $this->db->getQueryBuilder();
+	private function addToCache(string $table,
+								string $backendId,
+								$remote):int {
+		$query = $this->dbConnection->getQueryBuilder();
 		$query->insert($table)
 			->values([
-				'backend_id' => $query->createNamedParameter($remote->getBackend()->getBackendIdentifier()),
+				'backend_id' => $query->createNamedParameter($backendId),
 				'resource_id' => $query->createNamedParameter($remote->getId()),
 				'email' => $query->createNamedParameter($remote->getEMail()),
 				'displayname' => $query->createNamedParameter($remote->getDisplayName()),
@@ -298,37 +207,70 @@ class UpdateCalendarResourcesRoomsBackgroundJob extends TimedJob {
 					))
 			])
 			->execute();
+		return $query->getLastInsertId();
+	}
+
+	/**
+	 * @param string $table
+	 * @param string $foreignKey
+	 * @param int $foreignId
+	 * @param array $metadata
+	 */
+	private function addMetadataToCache(string $table,
+										string $foreignKey,
+										int $foreignId,
+										array $metadata):void {
+		foreach($metadata as $key => $value) {
+			$query = $this->dbConnection->getQueryBuilder();
+			$query->insert($table)
+				->values([
+					$foreignKey => $query->createNamedParameter($foreignId),
+					'key' => $query->createNamedParameter($key),
+					'value' => $query->createNamedParameter($value),
+				])
+				->execute();
+		}
 	}
 
 	/**
 	 * delete entry from cache that does not exist anymore remotely
 	 *
 	 * @param string $table
-	 * @param string $principalUri
-	 * @param string $backendId
-	 * @param string $resourceId
+	 * @param int $id
 	 */
-	private function deleteFromCache($table, $principalUri, $backendId, $resourceId) {
-		$query = $this->db->getQueryBuilder();
+	private function deleteFromCache(string $table,
+									 int $id):void {
+		$query = $this->dbConnection->getQueryBuilder();
 		$query->delete($table)
-			->where($query->expr()->eq('backend_id', $query->createNamedParameter($backendId)))
-			->andWhere($query->expr()->eq('resource_id', $query->createNamedParameter($resourceId)))
+			->where($query->expr()->eq('id', $query->createNamedParameter($id)))
 			->execute();
+	}
 
-		$calendar = $this->calDavBackend->getCalendarByUri($principalUri, implode('-', [$backendId, $resourceId]));
-		if ($calendar !== null) {
-			$this->calDavBackend->deleteCalendar($calendar['id']);
-		}
+	/**
+	 * @param string $table
+	 * @param string $foreignKey
+	 * @param int $id
+	 */
+	private function deleteMetadataFromCache(string $table,
+											 string $foreignKey,
+											 int $id):void {
+		$query = $this->dbConnection->getQueryBuilder();
+		$query->delete($table)
+			->where($query->expr()->eq($foreignKey, $query->createNamedParameter($id)))
+			->execute();
 	}
 
 	/**
 	 * update an existing entry in cache
 	 *
 	 * @param string $table
+	 * @param int $id
 	 * @param IResource|IRoom $remote
 	 */
-	private function updateCache($table, $remote) {
-		$query = $this->db->getQueryBuilder();
+	private function updateCache(string $table,
+								 int $id,
+								 $remote):void {
+		$query = $this->dbConnection->getQueryBuilder();
 		$query->update($table)
 			->set('email', $query->createNamedParameter($remote->getEMail()))
 			->set('displayname', $query->createNamedParameter($remote->getDisplayName()))
@@ -336,11 +278,57 @@ class UpdateCalendarResourcesRoomsBackgroundJob extends TimedJob {
 				$this->serializeGroupRestrictions(
 					$remote->getGroupRestrictions()
 				)))
-			->where($query->expr()->eq('backend_id', $query->createNamedParameter($remote->getBackend()->getBackendIdentifier())))
-			->andWhere($query->expr()->eq('resource_id', $query->createNamedParameter($remote->getId())))
+			->where($query->expr()->eq('id', $query->createNamedParameter($id)))
 			->execute();
 	}
 
+	/**
+	 * @param string $dbTable
+	 * @param string $foreignKey
+	 * @param int $id
+	 * @param array $metadata
+	 * @param array $cachedMetadata
+	 */
+	private function updateMetadataCache(string $dbTable,
+										 string $foreignKey,
+										 int $id,
+										 array $metadata,
+										 array $cachedMetadata):void {
+		$newMetadata = array_diff_key($metadata, $cachedMetadata);
+		$deletedMetadata = array_diff_key($cachedMetadata, $metadata);
+
+		foreach ($newMetadata as $key => $value) {
+			$query = $this->dbConnection->getQueryBuilder();
+			$query->insert($dbTable)
+				->values([
+					$foreignKey => $query->createNamedParameter($id),
+					'key' => $query->createNamedParameter($key),
+					'value' => $query->createNamedParameter($value),
+				])
+				->execute();
+		}
+
+		foreach($deletedMetadata as $key => $value) {
+			$query = $this->dbConnection->getQueryBuilder();
+			$query->delete($dbTable)
+				->where($query->expr()->eq($foreignKey, $query->createNamedParameter($id)))
+				->andWhere($query->expr()->eq('key', $query->createNamedParameter($key)))
+				->execute();
+		}
+
+		$existingKeys = array_keys(array_intersect_key($metadata, $cachedMetadata));
+		foreach($existingKeys as $existingKey) {
+			if ($metadata[$existingKey] !== $cachedMetadata[$existingKey]) {
+				$query = $this->dbConnection->getQueryBuilder();
+				$query->update($dbTable)
+					->set('value', $query->createNamedParameter($metadata[$existingKey]))
+					->where($query->expr()->eq($foreignKey, $query->createNamedParameter($id)))
+					->andWhere($query->expr()->eq('key', $query->createNamedParameter($existingKey)))
+					->execute();
+			}
+		}
+	}
+
 	/**
 	 * serialize array of group restrictions to store them in database
 	 *
@@ -350,4 +338,102 @@ class UpdateCalendarResourcesRoomsBackgroundJob extends TimedJob {
 	private function serializeGroupRestrictions(array $groups):string {
 		return \json_encode($groups);
 	}
+
+	/**
+	 * Gets all metadata of a backend
+	 *
+	 * @param IResource|IRoom $resource
+	 * @return array
+	 */
+	private function getAllMetadataOfBackend($resource):array {
+		if (!($resource instanceof IMetadataProvider)) {
+			return [];
+		}
+
+		$keys = $resource->getAllAvailableMetadataKeys();
+		$metadata = [];
+		foreach($keys as $key) {
+			$metadata[$key] = $resource->getMetadataForKey($key);
+		}
+
+		return $metadata;
+	}
+
+	/**
+	 * @param string $table
+	 * @param string $foreignKey
+	 * @param int $id
+	 * @return array
+	 */
+	private function getAllMetadataOfCache(string $table,
+										   string $foreignKey,
+										   int $id):array {
+		$query = $this->dbConnection->getQueryBuilder();
+		$query->select(['key', 'value'])
+			->from($table)
+			->where($query->expr()->eq($foreignKey, $query->createNamedParameter($id)));
+		$stmt = $query->execute();
+		$rows = $stmt->fetchAll(\PDO::FETCH_ASSOC);
+
+		$metadata = [];
+		foreach($rows as $row) {
+			$metadata[$row['key']] = $row['value'];
+		}
+
+		return $metadata;
+	}
+
+	/**
+	 * Gets all cached rooms / resources by backend
+	 *
+	 * @param $tableName
+	 * @param $backendId
+	 * @return array
+	 */
+	private function getAllCachedByBackend(string $tableName,
+										   string $backendId):array {
+		$query = $this->dbConnection->getQueryBuilder();
+		$query->select('resource_id')
+			->from($tableName)
+			->where($query->expr()->eq('backend_id', $query->createNamedParameter($backendId)));
+		$stmt = $query->execute();
+
+		return array_map(function($row) {
+			return $row['resource_id'];
+		}, $stmt->fetchAll(\PDO::FETCH_NAMED));
+	}
+
+	/**
+	 * @param $principalPrefix
+	 * @param $principalUri
+	 */
+	private function deleteCalendarDataForResource(string $principalPrefix,
+												   string $principalUri):void {
+		$calendar = $this->calDavBackend->getCalendarByUri(
+			implode('/', [$principalPrefix, $principalUri]),
+			CalDavBackend::RESOURCE_BOOKING_CALENDAR_URI);
+
+		if ($calendar !== null) {
+			$this->calDavBackend->deleteCalendar($calendar['id']);
+		}
+	}
+
+	/**
+	 * @param $table
+	 * @param $backendId
+	 * @param $resourceId
+	 * @return int
+	 */
+	private function getIdForBackendAndResource(string $table,
+												string $backendId,
+												string $resourceId):int {
+		$query = $this->dbConnection->getQueryBuilder();
+		$query->select('id')
+			->from($table)
+			->where($query->expr()->eq('backend_id', $query->createNamedParameter($backendId)))
+			->andWhere($query->expr()->eq('resource_id', $query->createNamedParameter($resourceId)));
+		$stmt = $query->execute();
+
+		return $stmt->fetch(\PDO::FETCH_NAMED)['id'];
+	}
 }

apps/dav/lib/CalDAV/BirthdayService.php

@@ -1,7 +1,8 @@
 <?php
+declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2016, ownCloud, Inc.
- * @copyright Copyright (c) 2016, Georg Ehrke
+ * @copyright Copyright (c) 2019, Georg Ehrke
  *
  * @author Achim Königs <garfonso@tratschtante.de>
  * @author Georg Ehrke <oc.list@georgehrke.com>
@@ -33,6 +34,7 @@ use OCA\DAV\CardDAV\CardDavBackend;
 use OCA\DAV\DAV\GroupPrincipalBackend;
 use OCP\IConfig;
 use OCP\IDBConnection;
+use OCP\IL10N;
 use Sabre\VObject\Component\VCalendar;
 use Sabre\VObject\Component\VCard;
 use Sabre\VObject\DateTimeParser;
@@ -41,6 +43,11 @@ use Sabre\VObject\InvalidDataException;
 use Sabre\VObject\Property\VCard\DateAndOrTime;
 use Sabre\VObject\Reader;
 
+/**
+ * Class BirthdayService
+ *
+ * @package OCA\DAV\CalDAV
+ */
 class BirthdayService {
 
 	const BIRTHDAY_CALENDAR_URI = 'contact_birthdays';
@@ -60,20 +67,31 @@ class BirthdayService {
 	/** @var IDBConnection */
 	private $dbConnection;
 
+	/** @var IL10N */
+	private $l10n;
+
 	/**
 	 * BirthdayService constructor.
 	 *
 	 * @param CalDavBackend $calDavBackEnd
 	 * @param CardDavBackend $cardDavBackEnd
 	 * @param GroupPrincipalBackend $principalBackend
-	 * @param IConfig $config;
+	 * @param IConfig $config
+	 * @param IDBConnection $dbConnection
+	 * @param IL10N $l10n
 	 */
-	public function __construct(CalDavBackend $calDavBackEnd, CardDavBackend $cardDavBackEnd, GroupPrincipalBackend $principalBackend, IConfig $config, IDBConnection $dbConnection) {
+	public function __construct(CalDavBackend $calDavBackEnd,
+								CardDavBackend $cardDavBackEnd,
+								GroupPrincipalBackend $principalBackend,
+								IConfig $config,
+								IDBConnection $dbConnection,
+								IL10N $l10n) {
 		$this->calDavBackEnd = $calDavBackEnd;
 		$this->cardDavBackEnd = $cardDavBackEnd;
 		$this->principalBackend = $principalBackend;
 		$this->config = $config;
 		$this->dbConnection = $dbConnection;
+		$this->l10n = $l10n;
 	}
 
 	/**
@@ -81,7 +99,9 @@ class BirthdayService {
 	 * @param string $cardUri
 	 * @param string $cardData
 	 */
-	public function onCardChanged($addressBookId, $cardUri, $cardData) {
+	public function onCardChanged(int $addressBookId,
+								  string $cardUri,
+								  string $cardData) {
 		if (!$this->isGloballyEnabled()) {
 			return;
 		}
@@ -90,10 +110,11 @@ class BirthdayService {
 		$book = $this->cardDavBackEnd->getAddressBookById($addressBookId);
 		$targetPrincipals[] = $book['principaluri'];
 		$datesToSync = [
-			['postfix' => '', 'field' => 'BDAY', 'symbol' => '*', 'utfSymbol' => '🎂'],
-			['postfix' => '-death', 'field' => 'DEATHDATE', 'symbol' => "†", 'utfSymbol' => '⚰️'],
-			['postfix' => '-anniversary', 'field' => 'ANNIVERSARY', 'symbol' => "⚭", 'utfSymbol' => '💍'],
+			['postfix' => '', 'field' => 'BDAY'],
+			['postfix' => '-death', 'field' => 'DEATHDATE'],
+			['postfix' => '-anniversary', 'field' => 'ANNIVERSARY'],
 		];
+
 		foreach ($targetPrincipals as $principalUri) {
 			if (!$this->isUserEnabled($principalUri)) {
 				continue;
@@ -101,7 +122,7 @@ class BirthdayService {
 
 			$calendar = $this->ensureCalendarExists($principalUri);
 			foreach ($datesToSync as $type) {
-				$this->updateCalendar($cardUri, $cardData, $book, $calendar['id'], $type);
+				$this->updateCalendar($cardUri, $cardData, $book, (int) $calendar['id'], $type);
 			}
 		}
 	}
@@ -110,7 +131,8 @@ class BirthdayService {
 	 * @param int $addressBookId
 	 * @param string $cardUri
 	 */
-	public function onCardDeleted($addressBookId, $cardUri) {
+	public function onCardDeleted(int $addressBookId,
+								  string $cardUri) {
 		if (!$this->isGloballyEnabled()) {
 			return;
 		}
@@ -136,7 +158,7 @@ class BirthdayService {
 	 * @return array|null
 	 * @throws \Sabre\DAV\Exception\BadRequest
 	 */
-	public function ensureCalendarExists($principal) {
+	public function ensureCalendarExists(string $principal):?array {
 		$calendar = $this->calDavBackEnd->getCalendarByUri($principal, self::BIRTHDAY_CALENDAR_URI);
 		if (!is_null($calendar)) {
 			return $calendar;
@@ -151,14 +173,15 @@ class BirthdayService {
 	}
 
 	/**
-	 * @param string $cardData
-	 * @param string $dateField
-	 * @param string $postfix
-	 * @param string $summarySymbol
-	 * @param string $utfSummarySymbol
-	 * @return null|VCalendar
+	 * @param $cardData
+	 * @param $dateField
+	 * @param $postfix
+	 * @return VCalendar|null
+	 * @throws InvalidDataException
 	 */
-	public function buildDateFromContact($cardData, $dateField, $postfix, $summarySymbol, $utfSummarySymbol) {
+	public function buildDateFromContact(string $cardData,
+										 string $dateField,
+										 string $postfix):?VCalendar {
 		if (empty($cardData)) {
 			return null;
 		}
@@ -220,23 +243,16 @@ class BirthdayService {
 		}
 
 		try {
-			$date = new \DateTime($birthday);
+			if ($birthday instanceof DateAndOrTime) {
+				$date = $birthday->getDateTime();
+			} else {
+				$date = new \DateTimeImmutable($birthday);
+			}
 		} catch (Exception $e) {
 			return null;
 		}
-		if ($this->dbConnection->supports4ByteText()) {
-			if ($unknownYear) {
-				$summary = $utfSummarySymbol . ' ' . $doc->FN->getValue();
-			} else {
-				$summary = $utfSummarySymbol . ' ' . $doc->FN->getValue() . " ($originalYear)";
-			}
-		} else {
-			if ($unknownYear) {
-				$summary = $doc->FN->getValue() . ' ' . $summarySymbol;
-			} else {
-				$summary = $doc->FN->getValue() . " ($summarySymbol$originalYear)";
-			}
-		}
+
+		$summary = $this->formatTitle($dateField, $doc->FN->getValue(), $originalYear, $this->dbConnection->supports4ByteText());
 
 		$vCal = new VCalendar();
 		$vCal->VERSION = '2.0';
@@ -247,10 +263,13 @@ class BirthdayService {
 		);
 		$vEvent->DTSTART['VALUE'] = 'DATE';
 		$vEvent->add('DTEND');
-		$date->add(new \DateInterval('P1D'));
+
+		$dtEndDate = (new \DateTime())->setTimestamp($date->getTimeStamp());
+		$dtEndDate->add(new \DateInterval('P1D'));
 		$vEvent->DTEND->setDateTime(
-			$date
+			$dtEndDate
 		);
+
 		$vEvent->DTEND['VALUE'] = 'DATE';
 		$vEvent->{'UID'} = $doc->UID . $postfix;
 		$vEvent->{'RRULE'} = 'FREQ=YEARLY';
@@ -273,7 +292,7 @@ class BirthdayService {
 	/**
 	 * @param string $user
 	 */
-	public function resetForUser($user) {
+	public function resetForUser(string $user):void {
 		$principal = 'principals/users/'.$user;
 		$calendar = $this->calDavBackEnd->getCalendarByUri($principal, self::BIRTHDAY_CALENDAR_URI);
 		$calendarObjects = $this->calDavBackEnd->getCalendarObjects($calendar['id'], CalDavBackend::CALENDAR_TYPE_CALENDAR);
@@ -285,15 +304,16 @@ class BirthdayService {
 
 	/**
 	 * @param string $user
+	 * @throws \Sabre\DAV\Exception\BadRequest
 	 */
-	public function syncUser($user) {
+	public function syncUser(string $user):void {
 		$principal = 'principals/users/'.$user;
 		$this->ensureCalendarExists($principal);
 		$books = $this->cardDavBackEnd->getAddressBooksForUser($principal);
 		foreach($books as $book) {
 			$cards = $this->cardDavBackEnd->getCards($book['id']);
 			foreach($cards as $card) {
-				$this->onCardChanged($book['id'], $card['uri'], $card['carddata']);
+				$this->onCardChanged((int) $book['id'], $card['uri'], $card['carddata']);
 			}
 		}
 	}
@@ -303,25 +323,25 @@ class BirthdayService {
 	 * @param VCalendar $newCalendarData
 	 * @return bool
 	 */
-	public function birthdayEvenChanged($existingCalendarData, $newCalendarData) {
+	public function birthdayEvenChanged(string $existingCalendarData,
+										VCalendar $newCalendarData):bool {
 		try {
 			$existingBirthday = Reader::read($existingCalendarData);
 		} catch (Exception $ex) {
 			return true;
 		}
-		if ($newCalendarData->VEVENT->DTSTART->getValue() !== $existingBirthday->VEVENT->DTSTART->getValue() ||
+
+		return (
+			$newCalendarData->VEVENT->DTSTART->getValue() !== $existingBirthday->VEVENT->DTSTART->getValue() ||
 			$newCalendarData->VEVENT->SUMMARY->getValue() !== $existingBirthday->VEVENT->SUMMARY->getValue()
-		) {
-			return true;
-		}
-		return false;
+		);
 	}
 
 	/**
 	 * @param integer $addressBookId
 	 * @return mixed
 	 */
-	protected function getAllAffectedPrincipals($addressBookId) {
+	protected function getAllAffectedPrincipals(int $addressBookId) {
 		$targetPrincipals = [];
 		$shares = $this->cardDavBackEnd->getShares($addressBookId);
 		foreach ($shares as $share) {
@@ -339,14 +359,20 @@ class BirthdayService {
 
 	/**
 	 * @param string $cardUri
-	 * @param string  $cardData
+	 * @param string $cardData
 	 * @param array $book
 	 * @param int $calendarId
-	 * @param string[] $type
+	 * @param array $type
+	 * @throws InvalidDataException
+	 * @throws \Sabre\DAV\Exception\BadRequest
 	 */
-	private function updateCalendar($cardUri, $cardData, $book, $calendarId, $type) {
+	private function updateCalendar(string $cardUri,
+									string $cardData,
+									array $book,
+									int $calendarId,
+									array $type):void {
 		$objectUri = $book['uri'] . '-' . $cardUri . $type['postfix'] . '.ics';
-		$calendarData = $this->buildDateFromContact($cardData, $type['field'], $type['postfix'], $type['symbol'], $type['utfSymbol']);
+		$calendarData = $this->buildDateFromContact($cardData, $type['field'], $type['postfix']);
 		$existing = $this->calDavBackEnd->getCalendarObject($calendarId, $objectUri);
 		if (is_null($calendarData)) {
 			if (!is_null($existing)) {
@@ -368,18 +394,17 @@ class BirthdayService {
 	 *
 	 * @return bool
 	 */
-	private function isGloballyEnabled() {
-		$isGloballyEnabled = $this->config->getAppValue('dav', 'generateBirthdayCalendar', 'yes');
-		return $isGloballyEnabled === 'yes';
+	private function isGloballyEnabled():bool {
+		return $this->config->getAppValue('dav', 'generateBirthdayCalendar', 'yes') === 'yes';
 	}
 
 	/**
-	 * checks if the user opted-out of birthday calendars
+	 * Checks if the user opted-out of birthday calendars
 	 *
-	 * @param $userPrincipal
+	 * @param string $userPrincipal The user principal to check for
 	 * @return bool
 	 */
-	private function isUserEnabled($userPrincipal) {
+	private function isUserEnabled(string $userPrincipal):bool {
 		if (strpos($userPrincipal, 'principals/users/') === 0) {
 			$userId = substr($userPrincipal, 17);
 			$isEnabled = $this->config->getUserValue($userId, 'dav', 'generateBirthdayCalendar', 'yes');
@@ -390,4 +415,69 @@ class BirthdayService {
 		return true;
 	}
 
+	/**
+	 * Formats title of Birthday event
+	 *
+	 * @param string $field Field name like BDAY, ANNIVERSARY, ...
+	 * @param string $name Name of contact
+	 * @param int|null $year Year of birth, anniversary, ...
+	 * @param bool $supports4Byte Whether or not the database supports 4 byte chars
+	 * @return string The formatted title
+	 */
+	private function formatTitle(string $field,
+								 string $name,
+								 int $year=null,
+								 bool $supports4Byte=true):string {
+		if ($supports4Byte) {
+			switch ($field) {
+				case 'BDAY':
+					return implode('', [
+						'🎂 ',
+						$name,
+						$year ? (' (' . $year . ')') : '',
+					]);
+
+				case 'DEATHDATE':
+					return implode('', [
+						$this->l10n->t('Death of %s', [$name]),
+						$year ? (' (' . $year . ')') : '',
+					]);
+
+				case 'ANNIVERSARY':
+					return implode('', [
+						'💍 ',
+						$name,
+						$year ? (' (' . $year . ')') : '',
+					]);
+
+				default:
+					return '';
+			}
+		} else {
+			switch($field) {
+				case 'BDAY':
+					return implode('', [
+						$name,
+						' ',
+						$year ? ('(*' . $year . ')') : '*',
+					]);
+
+				case 'DEATHDATE':
+					return implode('', [
+						$this->l10n->t('Death of %s', [$name]),
+						$year ? (' (' . $year . ')') : '',
+					]);
+
+				case 'ANNIVERSARY':
+					return implode('', [
+						$name,
+						' ',
+						$year ? ('(⚭' . $year . ')') : '⚭',
+					]);
+
+				default:
+					return '';
+			}
+		}
+	}
 }

apps/dav/lib/CalDAV/CachedSubscription.php

@@ -23,6 +23,7 @@ declare(strict_types=1);
  */
 namespace OCA\DAV\CalDAV;
 
+use OCA\DAV\Exception\UnsupportedLimitOnInitialSyncException;
 use Sabre\CalDAV\Backend\BackendInterface;
 use Sabre\DAV\Exception\MethodNotAllowed;
 use Sabre\DAV\Exception\NotFound;
@@ -195,4 +196,15 @@ class CachedSubscription extends \Sabre\CalDAV\Calendar {
 	public function calendarQuery(array $filters):array {
 		return $this->caldavBackend->calendarQuery($this->calendarInfo['id'], $filters, CalDavBackend::CALENDAR_TYPE_SUBSCRIPTION);
 	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getChanges($syncToken, $syncLevel, $limit = null) {
+		if (!$syncToken && $limit) {
+			throw new UnsupportedLimitOnInitialSyncException();
+		}
+
+		return parent::getChanges($syncToken, $syncLevel, $limit);
+	}
 }

apps/dav/lib/CalDAV/CalDavBackend.php

@@ -193,7 +193,7 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 								ISecureRandom $random,
 								ILogger $logger,
 								EventDispatcherInterface $dispatcher,
-								$legacyEndpoint = false) {
+								bool $legacyEndpoint = false) {
 		$this->db = $db;
 		$this->principalBackend = $principalBackend;
 		$this->userManager = $userManager;
@@ -1136,7 +1136,6 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 	 */
 	function updateCalendarObject($calendarId, $objectUri, $calendarData, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
 		$extraData = $this->getDenormalizedData($calendarData);
-
 		$query = $this->db->getQueryBuilder();
 		$query->update('calendarobjects')
 				->set('calendardata', $query->createNamedParameter($calendarData, IQueryBuilder::PARAM_LOB))

apps/dav/lib/CalDAV/Calendar.php

@@ -26,7 +26,9 @@
  */
 namespace OCA\DAV\CalDAV;
 
+use OCA\DAV\CalDAV\Proxy\ProxyMapper;
 use OCA\DAV\DAV\Sharing\IShareable;
+use OCA\DAV\Exception\UnsupportedLimitOnInitialSyncException;
 use OCP\IConfig;
 use OCP\IL10N;
 use Sabre\CalDAV\Backend\BackendInterface;
@@ -45,6 +47,14 @@ class Calendar extends \Sabre\CalDAV\Calendar implements IShareable {
 	/** @var IConfig */
 	private $config;
 
+	/**
+	 * Calendar constructor.
+	 *
+	 * @param BackendInterface $caldavBackend
+	 * @param $calendarInfo
+	 * @param IL10N $l10n
+	 * @param IConfig $config
+	 */
 	public function __construct(BackendInterface $caldavBackend, $calendarInfo, IL10N $l10n, IConfig $config) {
 		parent::__construct($caldavBackend, $calendarInfo);
 
@@ -118,27 +128,58 @@ class Calendar extends \Sabre\CalDAV\Calendar implements IShareable {
 		return $this->calendarInfo['principaluri'];
 	}
 
+	/**
+	 * @return array
+	 */
 	public function getACL() {
 		$acl =  [
 			[
 				'privilege' => '{DAV:}read',
 				'principal' => $this->getOwner(),
 				'protected' => true,
-			]];
+			],
+			[
+				'privilege' => '{DAV:}read',
+				'principal' => $this->getOwner() . '/calendar-proxy-write',
+				'protected' => true,
+			],
+			[
+				'privilege' => '{DAV:}read',
+				'principal' => $this->getOwner() . '/calendar-proxy-read',
+				'protected' => true,
+			],
+		];
+
 		if ($this->getName() !== BirthdayService::BIRTHDAY_CALENDAR_URI) {
 			$acl[] = [
 				'privilege' => '{DAV:}write',
 				'principal' => $this->getOwner(),
 				'protected' => true,
 			];
+			$acl[] = [
+				'privilege' => '{DAV:}write',
+				'principal' => $this->getOwner() . '/calendar-proxy-write',
+				'protected' => true,
+			];
 		} else {
 			$acl[] = [
 				'privilege' => '{DAV:}write-properties',
 				'principal' => $this->getOwner(),
 				'protected' => true,
 			];
+			$acl[] = [
+				'privilege' => '{DAV:}write-properties',
+				'principal' => $this->getOwner() . '/calendar-proxy-write',
+				'protected' => true,
+			];
 		}
 
+		$acl[] = [
+			'privilege' => '{DAV:}write-properties',
+			'principal' => $this->getOwner() . '/calendar-proxy-read',
+			'protected' => true,
+		];
+
 		if (!$this->isShared()) {
 			return $acl;
 		}
@@ -172,7 +213,13 @@ class Calendar extends \Sabre\CalDAV\Calendar implements IShareable {
 		}
 
 		$acl = $this->caldavBackend->applyShareAcl($this->getResourceId(), $acl);
-		$allowedPrincipals = [$this->getOwner(), parent::getOwner(), 'principals/system/public'];
+		$allowedPrincipals = [
+			$this->getOwner(),
+			$this->getOwner(). '/calendar-proxy-read',
+			$this->getOwner(). '/calendar-proxy-write',
+			parent::getOwner(),
+			'principals/system/public'
+		];
 		return array_filter($acl, function($rule) use ($allowedPrincipals) {
 			return \in_array($rule['principal'], $allowedPrincipals, true);
 		});
@@ -316,7 +363,11 @@ class Calendar extends \Sabre\CalDAV\Calendar implements IShareable {
 		return $this->caldavBackend->getPublishStatus($this);
 	}
 
-	private function canWrite() {
+	public function canWrite() {
+		if ($this->getName() === BirthdayService::BIRTHDAY_CALENDAR_URI) {
+			return false;
+		}
+
 		if (isset($this->calendarInfo['{http://owncloud.org/ns}read-only'])) {
 			return !$this->calendarInfo['{http://owncloud.org/ns}read-only'];
 		}
@@ -339,4 +390,14 @@ class Calendar extends \Sabre\CalDAV\Calendar implements IShareable {
 		return isset($this->calendarInfo['{http://calendarserver.org/ns/}source']);
 	}
 
+	/**
+	 * @inheritDoc
+	 */
+	public function getChanges($syncToken, $syncLevel, $limit = null) {
+		if (!$syncToken && $limit) {
+			throw new UnsupportedLimitOnInitialSyncException();
+		}
+
+		return parent::getChanges($syncToken, $syncLevel, $limit);
+	}
 }

apps/dav/lib/CalDAV/Proxy/Proxy.php

@@ -0,0 +1,51 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\DAV\CalDAV\Proxy;
+
+use OCP\AppFramework\Db\Entity;
+
+/**
+ * @method string getOwnerId()
+ * @method void setOwnerId(string $ownerId)
+ * @method string getProxyId()
+ * @method void setProxyId(string $proxyId)
+ * @method int getPermissions()
+ * @method void setPermissions(int $permissions)
+ */
+class Proxy extends Entity {
+
+	/** @var string */
+	protected $ownerId;
+	/** @var string */
+	protected $proxyId;
+	/** @var int */
+	protected $permissions;
+
+	public function __construct() {
+		$this->addType('ownerId', 'string');
+		$this->addType('proxyId', 'string');
+		$this->addType('permissions', 'int');
+	}
+}

apps/dav/lib/CalDAV/Proxy/ProxyMapper.php

@@ -0,0 +1,78 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\DAV\CalDAV\Proxy;
+
+use OCP\AppFramework\Db\QBMapper;
+use OCP\IDBConnection;
+
+/**
+ * Class ProxyMapper
+ *
+ * @package OCA\DAV\CalDAV\Proxy
+ */
+class ProxyMapper extends QBMapper {
+
+	const PERMISSION_READ  = 1;
+	const PERMISSION_WRITE = 2;
+
+	/**
+	 * ProxyMapper constructor.
+	 *
+	 * @param IDBConnection $db
+	 */
+	public function __construct(IDBConnection $db) {
+		parent::__construct($db, 'dav_cal_proxy', Proxy::class);
+	}
+
+	/**
+	 * @param string $proxyId The principal uri that can act as a proxy for the resulting calendars
+	 *
+	 * @return Proxy[]
+	 */
+	public function getProxiesFor(string $proxyId): array {
+		$qb = $this->db->getQueryBuilder();
+
+		$qb->select('*')
+			->from($this->getTableName())
+			->where($qb->expr()->eq('proxy_id', $qb->createNamedParameter($proxyId)));
+
+		return $this->findEntities($qb);
+	}
+
+	/**
+	 * @param string $ownerId The principal uri that has the resulting proxies for their calendars
+	 *
+	 * @return Proxy[]
+	 */
+	public function getProxiesOf(string $ownerId): array {
+		$qb = $this->db->getQueryBuilder();
+
+		$qb->select('*')
+			->from($this->getTableName())
+			->where($qb->expr()->eq('owner_id', $qb->createNamedParameter($ownerId)));
+
+		return $this->findEntities($qb);
+	}
+}

apps/dav/lib/CalDAV/Publishing/PublishPlugin.php

@@ -126,7 +126,10 @@ class PublishPlugin extends ServerPlugin {
 			});
 
 			$propFind->handle('{'.self::NS_CALENDARSERVER.'}allowed-sharing-modes', function() use ($node) {
-				return new AllowedSharingModes(!$node->isSubscription(), !$node->isSubscription());
+				$canShare = (!$node->isSubscription() && $node->canWrite());
+				$canPublish = (!$node->isSubscription() && $node->canWrite());
+
+				return new AllowedSharingModes($canShare, $canPublish);
 			});
 		}
 	}

apps/dav/lib/CalDAV/Reminder/Backend.php

@@ -0,0 +1,219 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Thomas Citharel
+ * @copyright Copyright (c) 2019, Georg Ehrke
+ *
+ * @author Thomas Citharel <tcit@tcit.fr>
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OCA\DAV\CalDAV\Reminder;
+
+use OCP\IDBConnection;
+use OCP\AppFramework\Utility\ITimeFactory;
+
+/**
+ * Class Backend
+ *
+ * @package OCA\DAV\CalDAV\Reminder
+ */
+class Backend {
+
+	/** @var IDBConnection */
+	protected $db;
+
+	/** @var ITimeFactory */
+	private $timeFactory;
+
+	/**
+	 * Backend constructor.
+	 *
+	 * @param IDBConnection $db
+	 * @param ITimeFactory $timeFactory
+	 */
+	public function __construct(IDBConnection $db,
+								ITimeFactory $timeFactory) {
+		$this->db = $db;
+		$this->timeFactory = $timeFactory;
+	}
+
+	/**
+	 * Get all reminders with a notification date before now
+	 *
+	 * @return array
+	 * @throws \Exception
+	 */
+	public function getRemindersToProcess():array {
+		$query = $this->db->getQueryBuilder();
+		$query->select(['cr.*', 'co.calendardata', 'c.displayname', 'c.principaluri'])
+			->from('calendar_reminders', 'cr')
+			->where($query->expr()->lte('cr.notification_date', $query->createNamedParameter($this->timeFactory->getTime())))
+			->leftJoin('cr', 'calendarobjects', 'co', $query->expr()->eq('cr.object_id', 'co.id'))
+			->leftJoin('cr', 'calendars', 'c', $query->expr()->eq('cr.calendar_id', 'c.id'));
+		$stmt = $query->execute();
+
+		return array_map(
+			[$this, 'fixRowTyping'],
+			$stmt->fetchAll()
+		);
+	}
+
+	/**
+	 * Get all scheduled reminders for an event
+	 *
+	 * @param int $objectId
+	 * @return array
+	 */
+	public function getAllScheduledRemindersForEvent(int $objectId):array {
+		$query = $this->db->getQueryBuilder();
+		$query->select('*')
+			->from('calendar_reminders')
+			->where($query->expr()->eq('object_id', $query->createNamedParameter($objectId)));
+		$stmt = $query->execute();
+
+		return array_map(
+			[$this, 'fixRowTyping'],
+			$stmt->fetchAll()
+		);
+	}
+
+	/**
+	 * Insert a new reminder into the database
+	 *
+	 * @param int $calendarId
+	 * @param int $objectId
+	 * @param string $uid
+	 * @param bool $isRecurring
+	 * @param int $recurrenceId
+	 * @param bool $isRecurrenceException
+	 * @param string $eventHash
+	 * @param string $alarmHash
+	 * @param string $type
+	 * @param bool $isRelative
+	 * @param int $notificationDate
+	 * @param bool $isRepeatBased
+	 * @return int The insert id
+	 */
+	public function insertReminder(int $calendarId,
+								   int $objectId,
+								   string $uid,
+								   bool $isRecurring,
+								   int $recurrenceId,
+								   bool $isRecurrenceException,
+								   string $eventHash,
+								   string $alarmHash,
+								   string $type,
+								   bool $isRelative,
+								   int $notificationDate,
+								   bool $isRepeatBased):int {
+		$query = $this->db->getQueryBuilder();
+		$query->insert('calendar_reminders')
+			->values([
+				'calendar_id' => $query->createNamedParameter($calendarId),
+				'object_id' => $query->createNamedParameter($objectId),
+				'uid' => $query->createNamedParameter($uid),
+				'is_recurring' => $query->createNamedParameter($isRecurring ? 1 : 0),
+				'recurrence_id' => $query->createNamedParameter($recurrenceId),
+				'is_recurrence_exception' => $query->createNamedParameter($isRecurrenceException ? 1 : 0),
+				'event_hash' => $query->createNamedParameter($eventHash),
+				'alarm_hash' => $query->createNamedParameter($alarmHash),
+				'type' => $query->createNamedParameter($type),
+				'is_relative' => $query->createNamedParameter($isRelative ? 1 : 0),
+				'notification_date' => $query->createNamedParameter($notificationDate),
+				'is_repeat_based' => $query->createNamedParameter($isRepeatBased ? 1 : 0),
+			])
+			->execute();
+
+		return $query->getLastInsertId();
+	}
+
+	/**
+	 * Sets a new notificationDate on an existing reminder
+	 *
+	 * @param int $reminderId
+	 * @param int $newNotificationDate
+	 */
+	public function updateReminder(int $reminderId,
+								   int $newNotificationDate):void {
+		$query = $this->db->getQueryBuilder();
+		$query->update('calendar_reminders')
+			->set('notification_date', $query->createNamedParameter($newNotificationDate))
+			->where($query->expr()->eq('id', $query->createNamedParameter($reminderId)))
+			->execute();
+	}
+
+	/**
+	 * Remove a reminder by it's id
+	 *
+	 * @param integer $reminderId
+	 * @return void
+	 */
+	public function removeReminder(int $reminderId):void {
+		$query = $this->db->getQueryBuilder();
+
+		$query->delete('calendar_reminders')
+			->where($query->expr()->eq('id', $query->createNamedParameter($reminderId)))
+			->execute();
+	}
+
+	/**
+	 * Cleans reminders in database
+	 *
+	 * @param int $objectId
+	 */
+	public function cleanRemindersForEvent(int $objectId):void {
+		$query = $this->db->getQueryBuilder();
+
+		$query->delete('calendar_reminders')
+			->where($query->expr()->eq('object_id', $query->createNamedParameter($objectId)))
+			->execute();
+	}
+
+	/**
+	 * Remove all reminders for a calendar
+	 *
+	 * @param int $calendarId
+	 * @return void
+	 */
+	public function cleanRemindersForCalendar(int $calendarId):void {
+		$query = $this->db->getQueryBuilder();
+
+		$query->delete('calendar_reminders')
+			->where($query->expr()->eq('calendar_id', $query->createNamedParameter($calendarId)))
+			->execute();
+	}
+
+	/**
+	 * @param array $row
+	 * @return array
+	 */
+	private function fixRowTyping(array $row): array {
+		$row['id'] = (int) $row['id'];
+		$row['calendar_id'] = (int) $row['calendar_id'];
+		$row['object_id'] = (int) $row['object_id'];
+		$row['is_recurring'] = (bool) $row['is_recurring'];
+		$row['recurrence_id'] = (int) $row['recurrence_id'];
+		$row['is_recurrence_exception'] = (bool) $row['is_recurrence_exception'];
+		$row['is_relative'] = (bool) $row['is_relative'];
+		$row['notification_date'] = (int) $row['notification_date'];
+		$row['is_repeat_based'] = (bool) $row['is_repeat_based'];
+
+		return $row;
+	}
+}

apps/dav/lib/CalDAV/Reminder/INotificationProvider.php

@@ -0,0 +1,47 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OCA\DAV\CalDAV\Reminder;
+
+use OCP\IUser;
+use Sabre\VObject\Component\VEvent;
+
+/**
+ * Interface INotificationProvider
+ *
+ * @package OCA\DAV\CalDAV\Reminder
+ */
+interface INotificationProvider {
+
+	/**
+	 * Send notification
+	 *
+	 * @param VEvent $vevent
+	 * @param string $calendarDisplayName
+	 * @param IUser[] $users
+	 * @return void
+	 */
+	public function send(VEvent $vevent,
+						 string $calendarDisplayName,
+						 array $users=[]): void;
+}

apps/dav/lib/CalDAV/Reminder/NotificationProvider/AbstractProvider.php

@@ -0,0 +1,188 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Thomas Citharel
+ * @copyright Copyright (c) 2019, Georg Ehrke
+ *
+ * @author Thomas Citharel <tcit@tcit.fr>
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OCA\DAV\CalDAV\Reminder\NotificationProvider;
+
+use OCA\DAV\CalDAV\Reminder\INotificationProvider;
+use OCP\IConfig;
+use OCP\IL10N;
+use OCP\ILogger;
+use OCP\IURLGenerator;
+use OCP\L10N\IFactory as L10NFactory;
+use OCP\IUser;
+use Sabre\VObject\Component\VEvent;
+use Sabre\VObject\DateTimeParser;
+use Sabre\VObject\Property;
+
+/**
+ * Class AbstractProvider
+ *
+ * @package OCA\DAV\CalDAV\Reminder\NotificationProvider
+ */
+abstract class AbstractProvider implements INotificationProvider  {
+
+	/** @var string */
+	public const NOTIFICATION_TYPE = '';
+
+	/** @var ILogger */
+	protected $logger;
+
+	/** @var L10NFactory */
+	private $l10nFactory;
+
+	/** @var IL10N[] */
+	private $l10ns;
+
+	/** @var string */
+	private $fallbackLanguage;
+
+	/** @var IURLGenerator */
+	protected $urlGenerator;
+
+	/** @var IConfig */
+	protected $config;
+
+	/**
+	 * @param ILogger $logger
+	 * @param L10NFactory $l10nFactory
+	 * @param IConfig $config
+	 * @param IUrlGenerator $urlGenerator
+	 */
+	public function __construct(ILogger $logger,
+								L10NFactory $l10nFactory,
+								IURLGenerator $urlGenerator,
+								IConfig $config) {
+		$this->logger = $logger;
+		$this->l10nFactory = $l10nFactory;
+		$this->urlGenerator = $urlGenerator;
+		$this->config = $config;
+	}
+
+	/**
+	 * Send notification
+	 *
+	 * @param VEvent $vevent
+	 * @param string $calendarDisplayName
+	 * @param IUser[] $users
+	 * @return void
+	 */
+	abstract public function send(VEvent $vevent,
+						   string $calendarDisplayName,
+						   array $users=[]): void;
+
+	/**
+	 * @return string
+	 */
+	protected function getFallbackLanguage():string {
+		if ($this->fallbackLanguage) {
+			return $this->fallbackLanguage;
+		}
+
+		$fallbackLanguage = $this->l10nFactory->findLanguage();
+		$this->fallbackLanguage = $fallbackLanguage;
+
+		return $fallbackLanguage;
+	}
+
+	/**
+	 * @param string $lang
+	 * @return bool
+	 */
+	protected function hasL10NForLang(string $lang):bool {
+		return $this->l10nFactory->languageExists('dav', $lang);
+	}
+
+	/**
+	 * @param string $lang
+	 * @return IL10N
+	 */
+	protected function getL10NForLang(string $lang):IL10N {
+		if (isset($this->l10ns[$lang])) {
+			return $this->l10ns[$lang];
+		}
+
+		$l10n = $this->l10nFactory->get('dav', $lang);
+		$this->l10ns[$lang] = $l10n;
+
+		return $l10n;
+	}
+
+	/**
+	 * @param VEvent $vevent
+	 * @return string
+	 */
+	private function getStatusOfEvent(VEvent $vevent):string {
+		if ($vevent->STATUS) {
+			return (string) $vevent->STATUS;
+		}
+
+		// Doesn't say so in the standard,
+		// but we consider events without a status
+		// to be confirmed
+		return 'CONFIRMED';
+	}
+
+	/**
+	 * @param VEvent $vevent
+	 * @return bool
+	 */
+	protected function isEventTentative(VEvent $vevent):bool {
+		return $this->getStatusOfEvent($vevent) === 'TENTATIVE';
+	}
+
+	/**
+	 * @param VEvent $vevent
+	 * @return Property\ICalendar\DateTime
+	 */
+	protected function getDTEndFromEvent(VEvent $vevent):Property\ICalendar\DateTime {
+		if (isset($vevent->DTEND)) {
+			return $vevent->DTEND;
+		}
+
+		if (isset($vevent->DURATION)) {
+			$isFloating = $vevent->DTSTART->isFloating();
+			/** @var Property\ICalendar\DateTime $end */
+			$end = clone $vevent->DTSTART;
+			$endDateTime = $end->getDateTime();
+			$endDateTime = $endDateTime->add(DateTimeParser::parse($vevent->DURATION->getValue()));
+			$end->setDateTime($endDateTime, $isFloating);
+
+			return $end;
+		}
+
+		if (!$vevent->DTSTART->hasTime()) {
+			$isFloating = $vevent->DTSTART->isFloating();
+			/** @var Property\ICalendar\DateTime $end */
+			$end = clone $vevent->DTSTART;
+			$endDateTime = $end->getDateTime();
+			$endDateTime = $endDateTime->modify('+1 day');
+			$end->setDateTime($endDateTime, $isFloating);
+
+			return $end;
+		}
+
+		return clone $vevent->DTSTART;
+	}
+}

apps/dav/lib/CalDAV/Reminder/NotificationProvider/AudioProvider.php

@@ -0,0 +1,37 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\CalDAV\Reminder\NotificationProvider;
+
+/**
+ * Class AudioProvider
+ *
+ * This class only extends PushProvider at the moment. It does not provide true
+ * audio-alarms yet, but it's better than no alarm at all right now.
+ *
+ * @package OCA\DAV\CalDAV\Reminder\NotificationProvider
+ */
+class AudioProvider extends PushProvider {
+
+	/** @var string */
+	public const NOTIFICATION_TYPE = 'AUDIO';
+}

apps/dav/lib/CalDAV/Reminder/NotificationProvider/EmailProvider.php

@@ -0,0 +1,503 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Thomas Citharel
+ * @copyright Copyright (c) 2019, Georg Ehrke
+ *
+ * @author Thomas Citharel <tcit@tcit.fr>
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OCA\DAV\CalDAV\Reminder\NotificationProvider;
+
+use \DateTime;
+use OCP\IConfig;
+use OCP\IL10N;
+use OCP\ILogger;
+use OCP\IURLGenerator;
+use OCP\L10N\IFactory as L10NFactory;
+use OCP\Mail\IEMailTemplate;
+use OCP\Mail\IMailer;
+use OCP\IUser;
+use Sabre\VObject\Component\VEvent;
+use Sabre\VObject;
+use Sabre\VObject\Parameter;
+use Sabre\VObject\Property;
+
+/**
+ * Class EmailProvider
+ *
+ * @package OCA\DAV\CalDAV\Reminder\NotificationProvider
+ */
+class EmailProvider extends AbstractProvider {
+
+	/** @var string */
+	public const NOTIFICATION_TYPE = 'EMAIL';
+
+	/** @var IMailer */
+	private $mailer;
+
+	/**
+	 * @param IConfig $config
+	 * @param IMailer $mailer
+	 * @param ILogger $logger
+	 * @param L10NFactory $l10nFactory
+	 * @param IUrlGenerator $urlGenerator
+	 */
+	public function __construct(IConfig $config,
+								IMailer $mailer,
+								ILogger $logger,
+								L10NFactory $l10nFactory,
+								IURLGenerator $urlGenerator) {
+		parent::__construct($logger, $l10nFactory, $urlGenerator, $config);
+		$this->mailer = $mailer;
+	}
+
+	/**
+	 * Send out notification via email
+	 *
+	 * @param VEvent $vevent
+	 * @param string $calendarDisplayName
+	 * @param array $users
+	 * @throws \Exception
+	 */
+	public function send(VEvent $vevent,
+						 string $calendarDisplayName,
+						 array $users=[]):void {
+		$fallbackLanguage = $this->getFallbackLanguage();
+
+		$emailAddressesOfSharees = $this->getEMailAddressesOfAllUsersWithWriteAccessToCalendar($users);
+		$emailAddressesOfAttendees = $this->getAllEMailAddressesFromEvent($vevent);
+
+		// Quote from php.net:
+		// If the input arrays have the same string keys, then the later value for that key will overwrite the previous one.
+		// => if there are duplicate email addresses, it will always take the system value
+		$emailAddresses = array_merge(
+			$emailAddressesOfAttendees,
+			$emailAddressesOfSharees
+		);
+
+		$sortedByLanguage = $this->sortEMailAddressesByLanguage($emailAddresses, $fallbackLanguage);
+		$organizer = $this->getOrganizerEMailAndNameFromEvent($vevent);
+
+		foreach($sortedByLanguage as $lang => $emailAddresses) {
+			if (!$this->hasL10NForLang($lang)) {
+				$lang = $fallbackLanguage;
+			}
+			$l10n = $this->getL10NForLang($lang);
+			$fromEMail = \OCP\Util::getDefaultEmailAddress('reminders-noreply');
+
+			$template = $this->mailer->createEMailTemplate('dav.calendarReminder');
+			$template->addHeader();
+			$this->addSubjectAndHeading($template, $l10n, $vevent);
+			$this->addBulletList($template, $l10n, $calendarDisplayName, $vevent);
+			$template->addFooter();
+
+			foreach ($emailAddresses as $emailAddress) {
+				$message = $this->mailer->createMessage();
+				$message->setFrom([$fromEMail]);
+				if ($organizer) {
+					$message->setReplyTo($organizer);
+				}
+				$message->setTo([$emailAddress]);
+				$message->useTemplate($template);
+
+				try {
+					$failed = $this->mailer->send($message);
+					if ($failed) {
+						$this->logger->error('Unable to deliver message to {failed}', ['app' => 'dav', 'failed' => implode(', ', $failed)]);
+					}
+				} catch (\Exception $ex) {
+					$this->logger->logException($ex, ['app' => 'dav']);
+				}
+			}
+		}
+	}
+
+	/**
+	 * @param IEMailTemplate $template
+	 * @param IL10N $l10n
+	 * @param VEvent $vevent
+	 */
+	private function addSubjectAndHeading(IEMailTemplate $template, IL10N $l10n, VEvent $vevent):void {
+		$template->setSubject('Notification: ' . $this->getTitleFromVEvent($vevent, $l10n));
+		$template->addHeading($this->getTitleFromVEvent($vevent, $l10n));
+	}
+
+	/**
+	 * @param IEMailTemplate $template
+	 * @param IL10N $l10n
+	 * @param string $calendarDisplayName
+	 * @param array $eventData
+	 */
+	private function addBulletList(IEMailTemplate $template,
+								   IL10N $l10n,
+								   string $calendarDisplayName,
+								   VEvent $vevent):void {
+		$template->addBodyListItem($calendarDisplayName, $l10n->t('Calendar:'),
+			$this->getAbsoluteImagePath('actions/info.svg'));
+
+		$template->addBodyListItem($this->generateDateString($l10n, $vevent), $l10n->t('Date:'),
+			$this->getAbsoluteImagePath('places/calendar.svg'));
+
+		if (isset($vevent->LOCATION)) {
+			$template->addBodyListItem((string) $vevent->LOCATION, $l10n->t('Where:'),
+				$this->getAbsoluteImagePath('actions/address.svg'));
+		}
+		if (isset($vevent->DESCRIPTION)) {
+			$template->addBodyListItem((string) $vevent->DESCRIPTION, $l10n->t('Description:'),
+				$this->getAbsoluteImagePath('actions/more.svg'));
+		}
+	}
+
+	/**
+	 * @param string $path
+	 * @return string
+	 */
+	private function getAbsoluteImagePath(string $path):string {
+		return $this->urlGenerator->getAbsoluteURL(
+			$this->urlGenerator->imagePath('core', $path)
+		);
+	}
+
+	/**
+	 * @param VEvent $vevent
+	 * @return array|null
+	 */
+	private function getOrganizerEMailAndNameFromEvent(VEvent $vevent):?array {
+		if (!$vevent->ORGANIZER) {
+			return null;
+		}
+
+		$organizer = $vevent->ORGANIZER;
+		if (strcasecmp($organizer->getValue(), 'mailto:') !== 0) {
+			return null;
+		}
+
+		$organizerEMail = substr($organizer->getValue(), 7);
+
+		$name = $organizer->offsetGet('CN');
+		if ($name instanceof Parameter) {
+			return [$organizerEMail => $name];
+		}
+
+		return [$organizerEMail];
+	}
+
+	/**
+	 * @param array $emails
+	 * @param string $defaultLanguage
+	 * @return array
+	 */
+	private function sortEMailAddressesByLanguage(array $emails,
+												  string $defaultLanguage):array {
+		$sortedByLanguage = [];
+
+		foreach($emails as $emailAddress => $parameters) {
+			if (isset($parameters['LANG'])) {
+				$lang = $parameters['LANG'];
+			} else {
+				$lang = $defaultLanguage;
+			}
+
+			if (!isset($sortedByLanguage[$lang])) {
+				$sortedByLanguage[$lang] = [];
+			}
+
+			$sortedByLanguage[$lang][] = $emailAddress;
+		}
+
+		return $sortedByLanguage;
+	}
+
+	/**
+	 * @param VEvent $vevent
+	 * @return array
+	 */
+	private function getAllEMailAddressesFromEvent(VEvent $vevent):array {
+		$emailAddresses = [];
+
+		if (isset($vevent->ATTENDEE)) {
+			foreach ($vevent->ATTENDEE as $attendee) {
+				if (!($attendee instanceof VObject\Property)) {
+					continue;
+				}
+
+				$cuType = $this->getCUTypeOfAttendee($attendee);
+				if (\in_array($cuType, ['RESOURCE', 'ROOM', 'UNKNOWN'])) {
+					// Don't send emails to things
+					continue;
+				}
+
+				$partstat = $this->getPartstatOfAttendee($attendee);
+				if ($partstat === 'DECLINED') {
+					// Don't send out emails to people who declined
+					continue;
+				}
+				if ($partstat === 'DELEGATED') {
+					$delegates = $attendee->offsetGet('DELEGATED-TO');
+					if (!($delegates instanceof VObject\Parameter)) {
+						continue;
+					}
+
+					$emailAddressesOfDelegates = $delegates->getParts();
+					foreach($emailAddressesOfDelegates as $addressesOfDelegate) {
+						if (strcasecmp($addressesOfDelegate, 'mailto:') === 0) {
+							$emailAddresses[substr($addressesOfDelegate, 7)] = [];
+						}
+					}
+
+					continue;
+				}
+
+				$emailAddressOfAttendee = $this->getEMailAddressOfAttendee($attendee);
+				if ($emailAddressOfAttendee !== null) {
+					$properties = [];
+
+					$langProp = $attendee->offsetGet('LANG');
+					if ($langProp instanceof VObject\Parameter) {
+						$properties['LANG'] = $langProp->getValue();
+					}
+
+					$emailAddresses[$emailAddressOfAttendee] = $properties;
+				}
+			}
+		}
+
+		if (isset($vevent->ORGANIZER) && $this->hasAttendeeMailURI($vevent->ORGANIZER)) {
+			$emailAddresses[$this->getEMailAddressOfAttendee($vevent->ORGANIZER)] = [];
+		}
+
+		return $emailAddresses;
+	}
+
+
+
+	/**
+	 * @param VObject\Property $attendee
+	 * @return string
+	 */
+	private function getCUTypeOfAttendee(VObject\Property $attendee):string {
+		$cuType = $attendee->offsetGet('CUTYPE');
+		if ($cuType instanceof VObject\Parameter) {
+			return strtoupper($cuType->getValue());
+		}
+
+		return 'INDIVIDUAL';
+	}
+
+	/**
+	 * @param VObject\Property $attendee
+	 * @return string
+	 */
+	private function getPartstatOfAttendee(VObject\Property $attendee):string {
+		$partstat = $attendee->offsetGet('PARTSTAT');
+		if ($partstat instanceof VObject\Parameter) {
+			return strtoupper($partstat->getValue());
+		}
+
+		return 'NEEDS-ACTION';
+	}
+
+	/**
+	 * @param VObject\Property $attendee
+	 * @return bool
+	 */
+	private function hasAttendeeMailURI(VObject\Property $attendee):bool {
+		return stripos($attendee->getValue(), 'mailto:') === 0;
+	}
+
+	/**
+	 * @param VObject\Property $attendee
+	 * @return string|null
+	 */
+	private function getEMailAddressOfAttendee(VObject\Property $attendee):?string {
+		if (!$this->hasAttendeeMailURI($attendee)) {
+			return null;
+		}
+
+		return substr($attendee->getValue(), 7);
+	}
+
+	/**
+	 * @param array $users
+	 * @return array
+	 */
+	private function getEMailAddressesOfAllUsersWithWriteAccessToCalendar(array $users):array {
+		$emailAddresses = [];
+
+		foreach($users as $user) {
+			$emailAddress = $user->getEMailAddress();
+			if ($emailAddress) {
+				$lang = $this->getLangForUser($user);
+				if ($lang) {
+					$emailAddresses[$emailAddress] = [
+						'LANG' => $lang,
+					];
+				} else {
+					$emailAddresses[$emailAddress] = [];
+				}
+			}
+		}
+
+		return $emailAddresses;
+	}
+
+	/**
+	 * @param IUser $user
+	 * @return string
+	 */
+	private function getLangForUser(IUser $user): ?string {
+		return $this->config->getUserValue($user->getUID(), 'core', 'lang', null);
+	}
+
+	/**
+	 * @param IL10N $l10n
+	 * @param VEvent $vevent
+	 * @return string
+	 * @throws \Exception
+	 */
+	private function generateDateString(IL10N $l10n, VEvent $vevent):string {
+		$isAllDay = $vevent->DTSTART instanceof Property\ICalendar\Date;
+
+		/** @var Property\ICalendar\Date | Property\ICalendar\DateTime $dtstart */
+		/** @var Property\ICalendar\Date | Property\ICalendar\DateTime $dtend */
+		/** @var \DateTimeImmutable $dtstartDt */
+		$dtstartDt = $vevent->DTSTART->getDateTime();
+		/** @var \DateTimeImmutable $dtendDt */
+		$dtendDt = $this->getDTEndFromEvent($vevent)->getDateTime();
+
+		$diff = $dtstartDt->diff($dtendDt);
+
+		/** @phan-suppress-next-line PhanUndeclaredClassMethod */
+		$dtstartDt = new \DateTime($dtstartDt->format(\DateTime::ATOM));
+		/** @phan-suppress-next-line PhanUndeclaredClassMethod */
+		$dtendDt = new \DateTime($dtendDt->format(\DateTime::ATOM));
+
+		if ($isAllDay) {
+			// One day event
+			if ($diff->days === 1) {
+				return $this->getDateString($l10n, $dtstartDt);
+			}
+
+			return implode(' - ', [
+				$this->getDateString($l10n, $dtstartDt),
+				$this->getDateString($l10n, $dtendDt),
+			]);
+		}
+
+		$startTimezone = $endTimezone = null;
+		if (!$vevent->DTSTART->isFloating()) {
+			/** @phan-suppress-next-line PhanUndeclaredClassMethod */
+			$startTimezone = $vevent->DTSTART->getDateTime()->getTimezone()->getName();
+			/** @phan-suppress-next-line PhanUndeclaredClassMethod */
+			$endTimezone = $this->getDTEndFromEvent($vevent)->getDateTime()->getTimezone()->getName();
+		}
+
+		$localeStart = implode(', ', [
+			$this->getWeekDayName($l10n, $dtstartDt),
+			$this->getDateTimeString($l10n, $dtstartDt)
+		]);
+
+		// always show full date with timezone if timezones are different
+		if ($startTimezone !== $endTimezone) {
+			$localeEnd = implode(', ', [
+				$this->getWeekDayName($l10n, $dtendDt),
+				$this->getDateTimeString($l10n, $dtendDt)
+			]);
+
+			return $localeStart
+				. ' (' . $startTimezone . ') '
+				. ' - '
+				. $localeEnd
+				. ' (' . $endTimezone . ')';
+		}
+
+		// Show only the time if the day is the same
+		$localeEnd = $this->isDayEqual($dtstartDt, $dtendDt)
+			? $this->getTimeString($l10n, $dtendDt)
+			: implode(', ', [
+				$this->getWeekDayName($l10n, $dtendDt),
+				$this->getDateTimeString($l10n, $dtendDt)
+			]);
+
+		return $localeStart
+			. ' - '
+			. $localeEnd
+			. ' (' . $startTimezone . ')';
+	}
+
+	/**
+	 * @param DateTime $dtStart
+	 * @param DateTime $dtEnd
+	 * @return bool
+	 */
+	private function isDayEqual(DateTime $dtStart,
+								DateTime $dtEnd):bool {
+		return $dtStart->format('Y-m-d') === $dtEnd->format('Y-m-d');
+	}
+
+	/**
+	 * @param IL10N $l10n
+	 * @param DateTime $dt
+	 * @return string
+	 */
+	private function getWeekDayName(IL10N $l10n, DateTime $dt):string {
+		return $l10n->l('weekdayName', $dt, ['width' => 'abbreviated']);
+	}
+
+	/**
+	 * @param IL10N $l10n
+	 * @param DateTime $dt
+	 * @return string
+	 */
+	private function getDateString(IL10N $l10n, DateTime $dt):string {
+		return $l10n->l('date', $dt, ['width' => 'medium']);
+	}
+
+	/**
+	 * @param IL10N $l10n
+	 * @param DateTime $dt
+	 * @return string
+	 */
+	private function getDateTimeString(IL10N $l10n, DateTime $dt):string {
+		return $l10n->l('datetime', $dt, ['width' => 'medium|short']);
+	}
+
+	/**
+	 * @param IL10N $l10n
+	 * @param DateTime $dt
+	 * @return string
+	 */
+	private function getTimeString(IL10N $l10n, DateTime $dt):string {
+		return $l10n->l('time', $dt, ['width' => 'short']);
+	}
+
+	/**
+	 * @param VEvent $vevent
+	 * @param IL10N $l10n
+	 * @return string
+	 */
+	private function getTitleFromVEvent(VEvent $vevent, IL10N $l10n):string {
+		if (isset($vevent->SUMMARY)) {
+			return (string)$vevent->SUMMARY;
+		}
+
+		return $l10n->t('Untitled event');
+	}
+}

apps/dav/lib/CalDAV/Reminder/NotificationProvider/ProviderNotAvailableException.php

@@ -0,0 +1,39 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2018 Thomas Citharel <tcit@tcit.fr>
+ *
+ * @author Thomas Citharel <tcit@tcit.fr>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OCA\DAV\CalDAV\Reminder\NotificationProvider;
+
+class ProviderNotAvailableException extends \Exception {
+
+	/**
+	 * ProviderNotAvailableException constructor.
+	 *
+	 * @since 16.0.0
+	 *
+	 * @param string $type ReminderType
+	 */
+	public function __construct(string $type) {
+		parent::__construct("No notification provider for type $type available");
+	}
+
+}

apps/dav/lib/CalDAV/Reminder/NotificationProvider/PushProvider.php

@@ -0,0 +1,146 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Thomas Citharel
+ * @copyright Copyright (c) 2019, Georg Ehrke
+ *
+ * @author Thomas Citharel <tcit@tcit.fr>
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OCA\DAV\CalDAV\Reminder\NotificationProvider;
+
+use OCA\DAV\AppInfo\Application;
+use OCP\IConfig;
+use OCP\ILogger;
+use OCP\IURLGenerator;
+use OCP\L10N\IFactory as L10NFactory;
+use OCP\Notification\IManager;
+use OCP\IUser;
+use OCP\Notification\INotification;
+use OCP\AppFramework\Utility\ITimeFactory;
+use Sabre\VObject\Component\VEvent;
+use Sabre\VObject\Property;
+
+/**
+ * Class PushProvider
+ *
+ * @package OCA\DAV\CalDAV\Reminder\NotificationProvider
+ */
+class PushProvider extends AbstractProvider {
+
+	/** @var string */
+	public const NOTIFICATION_TYPE = 'DISPLAY';
+
+	/** @var IManager */
+	private $manager;
+
+	/** @var ITimeFactory */
+	private $timeFactory;
+
+	/**
+	 * @param IConfig $config
+	 * @param IManager $manager
+	 * @param ILogger $logger
+	 * @param L10NFactory $l10nFactory
+	 * @param IUrlGenerator $urlGenerator
+	 * @param ITimeFactory $timeFactory
+	 */
+	public function __construct(IConfig $config,
+								IManager $manager,
+								ILogger $logger,
+								L10NFactory $l10nFactory,
+								IURLGenerator $urlGenerator,
+								ITimeFactory $timeFactory) {
+		parent::__construct($logger, $l10nFactory, $urlGenerator, $config);
+		$this->manager = $manager;
+		$this->timeFactory = $timeFactory;
+	}
+
+	/**
+	 * Send push notification to all users.
+	 *
+	 * @param VEvent $vevent
+	 * @param string $calendarDisplayName
+	 * @param IUser[] $users
+	 * @throws \Exception
+	 */
+	public function send(VEvent $vevent,
+						 string $calendarDisplayName=null,
+						 array $users=[]):void {
+		if ($this->config->getAppValue('dav', 'sendEventRemindersPush', 'no') !== 'yes') {
+			return;
+		}
+
+		$eventDetails = $this->extractEventDetails($vevent);
+		$eventDetails['calendar_displayname'] = $calendarDisplayName;
+		$eventUUID = (string) $vevent->UID;
+		// Empty Notification ObjectId will be catched by OC\Notification\Notification
+		$eventUUIDHash = $eventUUID ? hash('sha256', $eventUUID, false) : '';
+
+		foreach($users as $user) {
+			/** @var INotification $notification */
+			$notification = $this->manager->createNotification();
+			$notification->setApp(Application::APP_ID)
+				->setUser($user->getUID())
+				->setDateTime($this->timeFactory->getDateTime())
+				->setObject(Application::APP_ID, $eventUUIDHash)
+				->setSubject('calendar_reminder', [
+					'title' => $eventDetails['title'],
+					'start_atom' => $eventDetails['start_atom']
+				])
+				->setMessage('calendar_reminder', $eventDetails);
+
+			$this->manager->notify($notification);
+		}
+	}
+
+	/**
+	 * @var VEvent $vevent
+	 * @return array
+	 * @throws \Exception
+	 */
+	protected function extractEventDetails(VEvent $vevent):array {
+		/** @var Property\ICalendar\DateTime $start */
+		$start = $vevent->DTSTART;
+		$end = $this->getDTEndFromEvent($vevent);
+
+		return [
+			'title' => isset($vevent->SUMMARY)
+				? ((string) $vevent->SUMMARY)
+				: null,
+			'description' => isset($vevent->DESCRIPTION)
+				? ((string) $vevent->DESCRIPTION)
+				: null,
+			'location' => isset($vevent->LOCATION)
+				? ((string) $vevent->LOCATION)
+				: null,
+			'all_day' => $start instanceof Property\ICalendar\Date,
+			/** @phan-suppress-next-line PhanUndeclaredClassMethod */
+			'start_atom' => $start->getDateTime()->format(\DateTime::ATOM),
+			'start_is_floating' => $start->isFloating(),
+			/** @phan-suppress-next-line PhanUndeclaredClassMethod */
+			'start_timezone' => $start->getDateTime()->getTimezone()->getName(),
+			/** @phan-suppress-next-line PhanUndeclaredClassMethod */
+			'end_atom' => $end->getDateTime()->format(\DateTime::ATOM),
+			'end_is_floating' => $end->isFloating(),
+			/** @phan-suppress-next-line PhanUndeclaredClassMethod */
+			'end_timezone' => $end->getDateTime()->getTimezone()->getName(),
+		];
+	}
+}

apps/dav/lib/CalDAV/Reminder/NotificationProviderManager.php

@@ -0,0 +1,81 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Thomas Citharel
+ * @copyright Copyright (c) 2019, Georg Ehrke
+ *
+ * @author Thomas Citharel <tcit@tcit.fr>
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\CalDAV\Reminder;
+
+/**
+ * Class NotificationProviderManager
+ *
+ * @package OCA\DAV\CalDAV\Reminder
+ */
+class NotificationProviderManager {
+
+	/** @var INotificationProvider[] */
+	private $providers = [];
+
+	/**
+	 * Checks whether a provider for a given ACTION exists
+	 *
+	 * @param string $type
+	 * @return bool
+	 */
+	public function hasProvider(string $type):bool {
+		return (\in_array($type, ReminderService::REMINDER_TYPES, true)
+			&& isset($this->providers[$type]));
+	}
+
+	/**
+	 * Get provider for a given ACTION
+	 *
+	 * @param string $type
+	 * @return INotificationProvider
+	 * @throws NotificationProvider\ProviderNotAvailableException
+	 * @throws NotificationTypeDoesNotExistException
+	 */
+	public function getProvider(string $type):INotificationProvider {
+		if (in_array($type, ReminderService::REMINDER_TYPES, true)) {
+			if (isset($this->providers[$type])) {
+				return $this->providers[$type];
+			}
+			throw new NotificationProvider\ProviderNotAvailableException($type);
+		}
+		throw new NotificationTypeDoesNotExistException($type);
+	}
+
+	/**
+	 * Registers a new provider
+	 *
+	 * @param string $providerClassName
+	 * @throws \OCP\AppFramework\QueryException
+	 */
+	public function registerProvider(string $providerClassName):void {
+		$provider = \OC::$server->query($providerClassName);
+
+		if (!$provider instanceof INotificationProvider) {
+			throw new \InvalidArgumentException('Invalid notification provider registered');
+		}
+
+		$this->providers[$provider::NOTIFICATION_TYPE] = $provider;
+	}
+}

apps/dav/lib/CalDAV/Reminder/NotificationTypeDoesNotExistException.php

@@ -0,0 +1,40 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Thomas Citharel
+ *
+ * @author Thomas Citharel <tcit@tcit.fr>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\DAV\CalDAV\Reminder;
+
+class NotificationTypeDoesNotExistException extends \Exception {
+
+	/**
+	 * NotificationTypeDoesNotExistException constructor.
+	 *
+	 * @since 16.0.0
+	 *
+	 * @param string $type ReminderType
+	 */
+	public function __construct(string $type) {
+		parent::__construct("Type $type is not an accepted type of notification");
+	}
+
+}

apps/dav/lib/CalDAV/Reminder/Notifier.php

@@ -0,0 +1,316 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Thomas Citharel
+ * @copyright Copyright (c) 2019, Georg Ehrke
+ *
+ * @author Thomas Citharel <tcit@tcit.fr>
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\DAV\CalDAV\Reminder;
+
+use \DateTime;
+use OCA\DAV\AppInfo\Application;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\IL10N;
+use OCP\L10N\IFactory;
+use OCP\Notification\INotification;
+use OCP\Notification\INotifier;
+use OCP\IURLGenerator;
+
+/**
+ * Class Notifier
+ *
+ * @package OCA\DAV\CalDAV\Reminder
+ */
+class Notifier implements INotifier {
+
+	/** @var IFactory */
+	private $l10nFactory;
+
+	/** @var IURLGenerator */
+	private $urlGenerator;
+
+	/** @var IL10N */
+	private $l10n;
+
+	/** @var ITimeFactory */
+	private $timeFactory;
+
+	/**
+	 * Notifier constructor.
+	 *
+	 * @param IFactory $factory
+	 * @param IURLGenerator $urlGenerator
+	 * @param ITimeFactory $timeFactory
+	 */
+	public function __construct(IFactory $factory,
+								IURLGenerator $urlGenerator,
+								ITimeFactory $timeFactory) {
+		$this->l10nFactory = $factory;
+		$this->urlGenerator = $urlGenerator;
+		$this->timeFactory = $timeFactory;
+	}
+
+	/**
+	 * Identifier of the notifier, only use [a-z0-9_]
+	 *
+	 * @return string
+	 * @since 17.0.0
+	 */
+	public function getID():string {
+		return Application::APP_ID;
+	}
+
+	/**
+	 * Human readable name describing the notifier
+	 *
+	 * @return string
+	 * @since 17.0.0
+	 */
+	public function getName():string {
+		return $this->l10nFactory->get('dav')->t('Calendar');
+	}
+
+	/**
+	 * Prepare sending the notification
+	 *
+	 * @param INotification $notification
+	 * @param string $languageCode The code of the language that should be used to prepare the notification
+	 * @return INotification
+	 * @throws \Exception
+	 */
+	public function prepare(INotification $notification,
+							string $languageCode):INotification {
+		if ($notification->getApp() !== Application::APP_ID) {
+			throw new \InvalidArgumentException('Notification not from this app');
+		}
+
+		// Read the language from the notification
+		$this->l10n = $this->l10nFactory->get('dav', $languageCode);
+
+		// Handle notifier subjects
+		switch($notification->getSubject()) {
+			case 'calendar_reminder':
+				return $this->prepareReminderNotification($notification);
+
+			default:
+				throw new \InvalidArgumentException('Unknown subject');
+
+		}
+	}
+
+	/**
+	 * @param INotification $notification
+	 * @return INotification
+	 */
+	private function prepareReminderNotification(INotification $notification):INotification {
+		$imagePath = $this->urlGenerator->imagePath('core', 'places/calendar.svg');
+		$iconUrl = $this->urlGenerator->getAbsoluteURL($imagePath);
+		$notification->setIcon($iconUrl);
+
+		$this->prepareNotificationSubject($notification);
+		$this->prepareNotificationMessage($notification);
+
+		return $notification;
+	}
+
+	/**
+	 * Sets the notification subject based on the parameters set in PushProvider
+	 *
+	 * @param INotification $notification
+	 */
+	private function prepareNotificationSubject(INotification $notification): void {
+		$parameters = $notification->getSubjectParameters();
+
+		$startTime = \DateTime::createFromFormat(\DateTime::ATOM, $parameters['start_atom']);
+		$now = $this->timeFactory->getDateTime();
+		$title = $this->getTitleFromParameters($parameters);
+
+		$diff = $startTime->diff($now);
+		if ($diff === false) {
+			return;
+		}
+
+		$components = [];
+		if ($diff->y) {
+			$components[] = $this->l10n->n('%n year', '%n years', $diff->y);
+		}
+		if ($diff->m) {
+			$components[] = $this->l10n->n('%n month', '%n months', $diff->m);
+		}
+		if ($diff->d) {
+			$components[] = $this->l10n->n('%n day', '%n days', $diff->d);
+		}
+		if ($diff->h) {
+			$components[] = $this->l10n->n('%n hour', '%n hours', $diff->h);
+		}
+		if ($diff->i) {
+			$components[] = $this->l10n->n('%n minute', '%n minutes', $diff->i);
+		}
+
+		// Limiting to the first three components to prevent
+		// the string from getting too long
+		$firstThreeComponents = array_slice($components, 0, 2);
+		$diffLabel = implode(', ', $firstThreeComponents);
+
+		if ($diff->invert) {
+			$title = $this->l10n->t('%s (in %s)', [$title, $diffLabel]);
+		} else {
+			$title = $this->l10n->t('%s (%s ago)', [$title, $diffLabel]);
+		}
+
+		$notification->setParsedSubject($title);
+	}
+
+	/**
+	 * Sets the notification message based on the parameters set in PushProvider
+	 *
+	 * @param INotification $notification
+	 */
+	private function prepareNotificationMessage(INotification $notification): void {
+		$parameters = $notification->getMessageParameters();
+
+		$description = [
+			$this->l10n->t('Calendar: %s', $parameters['calendar_displayname']),
+			$this->l10n->t('Date: %s', $this->generateDateString($parameters)),
+		];
+		if ($parameters['description']) {
+			$description[] = $this->l10n->t('Description: %s', $parameters['description']);
+		}
+		if ($parameters['location']) {
+			$description[] = $this->l10n->t('Where: %s', $parameters['location']);
+		}
+
+		$message = implode("\r\n", $description);
+		$notification->setParsedMessage($message);
+	}
+
+	/**
+	 * @param array $parameters
+	 * @return string
+	 */
+	private function getTitleFromParameters(array $parameters):string {
+		return $parameters['title'] ?? $this->l10n->t('Untitled event');
+	}
+
+	/**
+	 * @param array $parameters
+	 * @return string
+	 * @throws \Exception
+	 */
+	private function generateDateString(array $parameters):string {
+		$startDateTime = DateTime::createFromFormat(\DateTime::ATOM, $parameters['start_atom']);
+		$endDateTime = DateTime::createFromFormat(\DateTime::ATOM, $parameters['end_atom']);
+		$isAllDay = $parameters['all_day'];
+		$diff = $startDateTime->diff($endDateTime);
+
+		if ($isAllDay) {
+			// One day event
+			if ($diff->days === 1) {
+				return $this->getDateString($startDateTime);
+			}
+
+			return implode(' - ', [
+				$this->getDateString($startDateTime),
+				$this->getDateString($endDateTime),
+			]);
+		}
+
+		$startTimezone = $endTimezone = null;
+		if (!$parameters['start_is_floating']) {
+			$startTimezone = $parameters['start_timezone'];
+			$endTimezone = $parameters['end_timezone'];
+		}
+
+		$localeStart = implode(', ', [
+			$this->getWeekDayName($startDateTime),
+			$this->getDateTimeString($startDateTime)
+		]);
+
+		// always show full date with timezone if timezones are different
+		if ($startTimezone !== $endTimezone) {
+			$localeEnd = implode(', ', [
+				$this->getWeekDayName($endDateTime),
+				$this->getDateTimeString($endDateTime)
+			]);
+
+			return $localeStart
+				. ' (' . $startTimezone . ') '
+				. ' - '
+				. $localeEnd
+				. ' (' . $endTimezone . ')';
+		}
+
+		// Show only the time if the day is the same
+		$localeEnd = $this->isDayEqual($startDateTime, $endDateTime)
+			? $this->getTimeString($endDateTime)
+			: implode(', ', [
+				$this->getWeekDayName($endDateTime),
+				$this->getDateTimeString($endDateTime)
+			]);
+
+		return $localeStart
+			. ' - '
+			. $localeEnd
+			. ' (' . $startTimezone . ')';
+	}
+
+	/**
+	 * @param DateTime $dtStart
+	 * @param DateTime $dtEnd
+	 * @return bool
+	 */
+	private function isDayEqual(DateTime $dtStart,
+								DateTime $dtEnd):bool {
+		return $dtStart->format('Y-m-d') === $dtEnd->format('Y-m-d');
+	}
+
+	/**
+	 * @param DateTime $dt
+	 * @return string
+	 */
+	private function getWeekDayName(DateTime $dt):string {
+		return $this->l10n->l('weekdayName', $dt, ['width' => 'abbreviated']);
+	}
+
+	/**
+	 * @param DateTime $dt
+	 * @return string
+	 */
+	private function getDateString(DateTime $dt):string {
+		return $this->l10n->l('date', $dt, ['width' => 'medium']);
+	}
+
+	/**
+	 * @param DateTime $dt
+	 * @return string
+	 */
+	private function getDateTimeString(DateTime $dt):string {
+		return $this->l10n->l('datetime', $dt, ['width' => 'medium|short']);
+	}
+
+	/**
+	 * @param DateTime $dt
+	 * @return string
+	 */
+	private function getTimeString(DateTime $dt):string {
+		return $this->l10n->l('time', $dt, ['width' => 'short']);
+	}
+}

apps/dav/lib/CalDAV/Reminder/ReminderService.php

@@ -0,0 +1,777 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Thomas Citharel
+ * @copyright Copyright (c) 2019, Georg Ehrke
+ *
+ * @author Thomas Citharel <tcit@tcit.fr>
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\CalDAV\Reminder;
+
+use \DateTimeImmutable;
+use OCA\DAV\CalDAV\CalDavBackend;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\IGroup;
+use OCP\IGroupManager;
+use OCP\IUser;
+use OCP\IUserManager;
+use Sabre\VObject;
+use Sabre\VObject\Component\VAlarm;
+use Sabre\VObject\Component\VEvent;
+use Sabre\VObject\ParseException;
+use Sabre\VObject\Recur\EventIterator;
+use Sabre\VObject\Recur\NoInstancesException;
+
+class ReminderService {
+
+	/** @var Backend */
+	private $backend;
+
+	/** @var NotificationProviderManager */
+	private $notificationProviderManager;
+
+	/** @var IUserManager */
+	private $userManager;
+
+	/** @var IGroupManager */
+	private $groupManager;
+
+	/** @var CalDavBackend */
+	private $caldavBackend;
+
+	/** @var ITimeFactory */
+	private $timeFactory;
+
+	public const REMINDER_TYPE_EMAIL = 'EMAIL';
+	public const REMINDER_TYPE_DISPLAY = 'DISPLAY';
+	public const REMINDER_TYPE_AUDIO = 'AUDIO';
+
+	/**
+	 * @var String[]
+	 *
+	 * Official RFC5545 reminder types
+	 */
+	public const REMINDER_TYPES = [
+		self::REMINDER_TYPE_EMAIL,
+		self::REMINDER_TYPE_DISPLAY,
+		self::REMINDER_TYPE_AUDIO
+	];
+
+	/**
+	 * ReminderService constructor.
+	 *
+	 * @param Backend $backend
+	 * @param NotificationProviderManager $notificationProviderManager
+	 * @param IUserManager $userManager
+	 * @param IGroupManager $groupManager
+	 * @param CalDavBackend $caldavBackend
+	 * @param ITimeFactory $timeFactory
+	 */
+	public function __construct(Backend $backend,
+								NotificationProviderManager $notificationProviderManager,
+								IUserManager $userManager,
+								IGroupManager $groupManager,
+								CalDavBackend $caldavBackend,
+								ITimeFactory $timeFactory) {
+		$this->backend = $backend;
+		$this->notificationProviderManager = $notificationProviderManager;
+		$this->userManager = $userManager;
+		$this->groupManager = $groupManager;
+		$this->caldavBackend = $caldavBackend;
+		$this->timeFactory = $timeFactory;
+	}
+
+	/**
+	 * Process reminders to activate
+	 *
+	 * @throws NotificationProvider\ProviderNotAvailableException
+	 * @throws NotificationTypeDoesNotExistException
+	 */
+	public function processReminders():void {
+		$reminders = $this->backend->getRemindersToProcess();
+
+		foreach($reminders as $reminder) {
+			$calendarData = is_resource($reminder['calendardata'])
+				? stream_get_contents($reminder['calendardata'])
+				: $reminder['calendardata'];
+
+			$vcalendar = $this->parseCalendarData($calendarData);
+			if (!$vcalendar) {
+				$this->backend->removeReminder($reminder['id']);
+				continue;
+			}
+
+			$vevent = $this->getVEventByRecurrenceId($vcalendar, $reminder['recurrence_id'], $reminder['is_recurrence_exception']);
+			if (!$vevent) {
+				$this->backend->removeReminder($reminder['id']);
+				continue;
+			}
+
+			if ($this->wasEventCancelled($vevent)) {
+				$this->deleteOrProcessNext($reminder, $vevent);
+				continue;
+			}
+
+			if (!$this->notificationProviderManager->hasProvider($reminder['type'])) {
+				$this->deleteOrProcessNext($reminder, $vevent);
+				continue;
+			}
+
+			$users = $this->getAllUsersWithWriteAccessToCalendar($reminder['calendar_id']);
+			$user = $this->getUserFromPrincipalURI($reminder['principaluri']);
+			if ($user) {
+				$users[] = $user;
+			}
+
+			$notificationProvider = $this->notificationProviderManager->getProvider($reminder['type']);
+			$notificationProvider->send($vevent, $reminder['displayname'], $users);
+
+			$this->deleteOrProcessNext($reminder, $vevent);
+		}
+	}
+
+	/**
+	 * @param string $action
+	 * @param array $objectData
+	 * @throws VObject\InvalidDataException
+	 */
+	public function onTouchCalendarObject(string $action,
+										  array $objectData):void {
+		// We only support VEvents for now
+		if (strcasecmp($objectData['component'], 'vevent') !== 0) {
+			return;
+		}
+
+		switch($action) {
+			case '\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject':
+				$this->onCalendarObjectCreate($objectData);
+				break;
+
+			case '\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject':
+				$this->onCalendarObjectEdit($objectData);
+				break;
+
+			case '\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject':
+				$this->onCalendarObjectDelete($objectData);
+				break;
+
+			default:
+				break;
+		}
+	}
+
+	/**
+	 * @param array $objectData
+	 */
+	private function onCalendarObjectCreate(array $objectData):void {
+		$calendarData = is_resource($objectData['calendardata'])
+			? stream_get_contents($objectData['calendardata'])
+			: $objectData['calendardata'];
+
+		/** @var VObject\Component\VCalendar $vcalendar */
+		$vcalendar = $this->parseCalendarData($calendarData);
+		if (!$vcalendar) {
+			return;
+		}
+
+		$vevents = $this->getAllVEventsFromVCalendar($vcalendar);
+		if (count($vevents) === 0) {
+			return;
+		}
+
+		$uid = (string) $vevents[0]->UID;
+		$recurrenceExceptions = $this->getRecurrenceExceptionFromListOfVEvents($vevents);
+		$masterItem = $this->getMasterItemFromListOfVEvents($vevents);
+		$now = $this->timeFactory->getDateTime();
+		$isRecurring = $masterItem ? $this->isRecurring($masterItem) : false;
+
+		foreach($recurrenceExceptions as $recurrenceException) {
+			$eventHash = $this->getEventHash($recurrenceException);
+
+			if (!isset($recurrenceException->VALARM)) {
+				continue;
+			}
+
+			foreach($recurrenceException->VALARM as $valarm) {
+				/** @var VAlarm $valarm */
+				$alarmHash = $this->getAlarmHash($valarm);
+				$triggerTime = $valarm->getEffectiveTriggerTime();
+				$diff = $now->diff($triggerTime);
+				if ($diff->invert === 1) {
+					continue;
+				}
+
+				$alarms = $this->getRemindersForVAlarm($valarm, $objectData,
+					$eventHash, $alarmHash, true, true);
+				$this->writeRemindersToDatabase($alarms);
+			}
+		}
+
+		if ($masterItem) {
+			$processedAlarms = [];
+			$masterAlarms = [];
+			$masterHash = $this->getEventHash($masterItem);
+
+			if (!isset($masterItem->VALARM)) {
+				return;
+			}
+
+			foreach($masterItem->VALARM as $valarm) {
+				$masterAlarms[] = $this->getAlarmHash($valarm);
+			}
+
+			try {
+				$iterator = new EventIterator($vevents, $uid);
+			} catch (NoInstancesException $e) {
+				// This event is recurring, but it doesn't have a single
+				// instance. We are skipping this event from the output
+				// entirely.
+				return;
+			}
+
+			while($iterator->valid() && count($processedAlarms) < count($masterAlarms)) {
+				$event = $iterator->getEventObject();
+
+				// Recurrence-exceptions are handled separately, so just ignore them here
+				if (\in_array($event, $recurrenceExceptions, true)) {
+					$iterator->next();
+					continue;
+				}
+
+				foreach($event->VALARM as $valarm) {
+					/** @var VAlarm $valarm */
+					$alarmHash = $this->getAlarmHash($valarm);
+					if (\in_array($alarmHash, $processedAlarms, true)) {
+						continue;
+					}
+
+					if (!\in_array((string) $valarm->ACTION, self::REMINDER_TYPES, true)) {
+						// Action allows x-name, we don't insert reminders
+						// into the database if they are not standard
+						$processedAlarms[] = $alarmHash;
+						continue;
+					}
+
+					$triggerTime = $valarm->getEffectiveTriggerTime();
+
+					// If effective trigger time is in the past
+					// just skip and generate for next event
+					$diff = $now->diff($triggerTime);
+					if ($diff->invert === 1) {
+						// If an absolute alarm is in the past,
+						// just add it to processedAlarms, so
+						// we don't extend till eternity
+						if (!$this->isAlarmRelative($valarm)) {
+							$processedAlarms[] = $alarmHash;
+						}
+
+						continue;
+					}
+
+					$alarms = $this->getRemindersForVAlarm($valarm, $objectData, $masterHash, $alarmHash, $isRecurring, false);
+					$this->writeRemindersToDatabase($alarms);
+					$processedAlarms[] = $alarmHash;
+				}
+
+				$iterator->next();
+			}
+		}
+	}
+
+	/**
+	 * @param array $objectData
+	 */
+	private function onCalendarObjectEdit(array $objectData):void {
+		// TODO - this can be vastly improved
+		//  - get cached reminders
+		//  - ...
+
+		$this->onCalendarObjectDelete($objectData);
+		$this->onCalendarObjectCreate($objectData);
+	}
+
+	/**
+	 * @param array $objectData
+	 */
+	private function onCalendarObjectDelete(array $objectData):void {
+		$this->backend->cleanRemindersForEvent((int) $objectData['id']);
+	}
+
+	/**
+	 * @param VAlarm $valarm
+	 * @param array $objectData
+	 * @param string|null $eventHash
+	 * @param string|null $alarmHash
+	 * @param bool $isRecurring
+	 * @param bool $isRecurrenceException
+	 * @return array
+	 */
+	private function getRemindersForVAlarm(VAlarm $valarm,
+										   array $objectData,
+										   string $eventHash=null,
+										   string $alarmHash=null,
+										   bool $isRecurring=false,
+										   bool $isRecurrenceException=false):array {
+		if ($eventHash === null) {
+			$eventHash = $this->getEventHash($valarm->parent);
+		}
+		if ($alarmHash === null) {
+			$alarmHash = $this->getAlarmHash($valarm);
+		}
+
+		$recurrenceId = $this->getEffectiveRecurrenceIdOfVEvent($valarm->parent);
+		$isRelative = $this->isAlarmRelative($valarm);
+		/** @var DateTimeImmutable $notificationDate */
+		$notificationDate = $valarm->getEffectiveTriggerTime();
+		$clonedNotificationDate = new \DateTime('now', $notificationDate->getTimezone());
+		$clonedNotificationDate->setTimestamp($notificationDate->getTimestamp());
+
+		$alarms = [];
+
+		$alarms[] = [
+			'calendar_id' => $objectData['calendarid'],
+			'object_id' => $objectData['id'],
+			'uid' => (string) $valarm->parent->UID,
+			'is_recurring' => $isRecurring,
+			'recurrence_id' => $recurrenceId,
+			'is_recurrence_exception' => $isRecurrenceException,
+			'event_hash' => $eventHash,
+			'alarm_hash' => $alarmHash,
+			'type' => (string) $valarm->ACTION,
+			'is_relative' => $isRelative,
+			'notification_date' => $notificationDate->getTimestamp(),
+			'is_repeat_based' => false,
+		];
+
+		$repeat = isset($valarm->REPEAT) ? (int) $valarm->REPEAT->getValue() : 0;
+		for($i = 0; $i < $repeat; $i++) {
+			if ($valarm->DURATION === null) {
+				continue;
+			}
+
+			$clonedNotificationDate->add($valarm->DURATION->getDateInterval());
+			$alarms[] = [
+				'calendar_id' => $objectData['calendarid'],
+				'object_id' => $objectData['id'],
+				'uid' => (string) $valarm->parent->UID,
+				'is_recurring' => $isRecurring,
+				'recurrence_id' => $recurrenceId,
+				'is_recurrence_exception' => $isRecurrenceException,
+				'event_hash' => $eventHash,
+				'alarm_hash' => $alarmHash,
+				'type' => (string) $valarm->ACTION,
+				'is_relative' => $isRelative,
+				'notification_date' => $clonedNotificationDate->getTimestamp(),
+				'is_repeat_based' => true,
+			];
+		}
+
+		return $alarms;
+	}
+
+	/**
+	 * @param array $reminders
+	 */
+	private function writeRemindersToDatabase(array $reminders): void {
+		foreach($reminders as $reminder) {
+			$this->backend->insertReminder(
+				(int) $reminder['calendar_id'],
+				(int) $reminder['object_id'],
+				$reminder['uid'],
+				$reminder['is_recurring'],
+				(int) $reminder['recurrence_id'],
+				$reminder['is_recurrence_exception'],
+				$reminder['event_hash'],
+				$reminder['alarm_hash'],
+				$reminder['type'],
+				$reminder['is_relative'],
+				(int) $reminder['notification_date'],
+				$reminder['is_repeat_based']
+			);
+		}
+	}
+
+	/**
+	 * @param array $reminder
+	 * @param VEvent $vevent
+	 */
+	private function deleteOrProcessNext(array $reminder,
+										 VObject\Component\VEvent $vevent):void {
+		if ($reminder['is_repeat_based'] ||
+			!$reminder['is_recurring'] ||
+			!$reminder['is_relative'] ||
+			$reminder['is_recurrence_exception']) {
+
+			$this->backend->removeReminder($reminder['id']);
+			return;
+		}
+
+		$vevents = $this->getAllVEventsFromVCalendar($vevent->parent);
+		$recurrenceExceptions = $this->getRecurrenceExceptionFromListOfVEvents($vevents);
+		$now = $this->timeFactory->getDateTime();
+
+		try {
+			$iterator = new EventIterator($vevents, $reminder['uid']);
+		} catch (NoInstancesException $e) {
+			// This event is recurring, but it doesn't have a single
+			// instance. We are skipping this event from the output
+			// entirely.
+			return;
+		}
+
+		while($iterator->valid()) {
+			$event = $iterator->getEventObject();
+
+			// Recurrence-exceptions are handled separately, so just ignore them here
+			if (\in_array($event, $recurrenceExceptions, true)) {
+				$iterator->next();
+				continue;
+			}
+
+			$recurrenceId = $this->getEffectiveRecurrenceIdOfVEvent($event);
+			if ($reminder['recurrence_id'] >= $recurrenceId) {
+				$iterator->next();
+				continue;
+			}
+
+			foreach($event->VALARM as $valarm) {
+				/** @var VAlarm $valarm */
+				$alarmHash = $this->getAlarmHash($valarm);
+				if ($alarmHash !== $reminder['alarm_hash']) {
+					continue;
+				}
+
+				$triggerTime = $valarm->getEffectiveTriggerTime();
+
+				// If effective trigger time is in the past
+				// just skip and generate for next event
+				$diff = $now->diff($triggerTime);
+				if ($diff->invert === 1) {
+					continue;
+				}
+
+				$this->backend->removeReminder($reminder['id']);
+				$alarms = $this->getRemindersForVAlarm($valarm, [
+					'calendarid' => $reminder['calendar_id'],
+					'id' => $reminder['object_id'],
+				], $reminder['event_hash'], $alarmHash, true, false);
+				$this->writeRemindersToDatabase($alarms);
+
+				// Abort generating reminders after creating one successfully
+				return;
+			}
+
+			$iterator->next();
+		}
+
+		$this->backend->removeReminder($reminder['id']);
+	}
+
+	/**
+	 * @param int $calendarId
+	 * @return IUser[]
+	 */
+	private function getAllUsersWithWriteAccessToCalendar(int $calendarId):array {
+		$shares = $this->caldavBackend->getShares($calendarId);
+
+		$users = [];
+		$userIds = [];
+		$groups = [];
+		foreach ($shares as $share) {
+			// Only consider writable shares
+			if ($share['readOnly']) {
+				continue;
+			}
+
+			$principal = explode('/', $share['{http://owncloud.org/ns}principal']);
+			if ($principal[1] === 'users') {
+				$user = $this->userManager->get($principal[2]);
+				if ($user) {
+					$users[] = $user;
+					$userIds[] = $principal[2];
+				}
+			} else if ($principal[1] === 'groups') {
+				$groups[] = $principal[2];
+			}
+		}
+
+		foreach ($groups as $gid) {
+			$group = $this->groupManager->get($gid);
+			if ($group instanceof IGroup) {
+				foreach ($group->getUsers() as $user) {
+					if (!\in_array($user->getUID(), $userIds, true)) {
+						$users[] = $user;
+						$userIds[] = $user->getUID();
+					}
+				}
+			}
+		}
+
+		return $users;
+	}
+
+	/**
+	 * Gets a hash of the event.
+	 * If the hash changes, we have to update all relative alarms.
+	 *
+	 * @param VEvent $vevent
+	 * @return string
+	 */
+	private function getEventHash(VEvent $vevent):string {
+		$properties = [
+			(string) $vevent->DTSTART->serialize(),
+		];
+
+		if ($vevent->DTEND) {
+			$properties[] = (string) $vevent->DTEND->serialize();
+		}
+		if ($vevent->DURATION) {
+			$properties[] = (string) $vevent->DURATION->serialize();
+		}
+		if ($vevent->{'RECURRENCE-ID'}) {
+			$properties[] = (string) $vevent->{'RECURRENCE-ID'}->serialize();
+		}
+		if ($vevent->RRULE) {
+			$properties[] = (string) $vevent->RRULE->serialize();
+		}
+		if ($vevent->EXDATE) {
+			$properties[] = (string) $vevent->EXDATE->serialize();
+		}
+		if ($vevent->RDATE) {
+			$properties[] = (string) $vevent->RDATE->serialize();
+		}
+
+		return md5(implode('::', $properties));
+	}
+
+	/**
+	 * Gets a hash of the alarm.
+	 * If the hash changes, we have to update oc_dav_reminders.
+	 *
+	 * @param VAlarm $valarm
+	 * @return string
+	 */
+	private function getAlarmHash(VAlarm $valarm):string {
+		$properties = [
+			(string) $valarm->ACTION->serialize(),
+			(string) $valarm->TRIGGER->serialize(),
+		];
+
+		if ($valarm->DURATION) {
+			$properties[] = (string) $valarm->DURATION->serialize();
+		}
+		if ($valarm->REPEAT) {
+			$properties[] = (string) $valarm->REPEAT->serialize();
+		}
+
+		return md5(implode('::', $properties));
+	}
+
+	/**
+	 * @param VObject\Component\VCalendar $vcalendar
+	 * @param int $recurrenceId
+	 * @param bool $isRecurrenceException
+	 * @return VEvent|null
+	 */
+	private function getVEventByRecurrenceId(VObject\Component\VCalendar $vcalendar,
+											 int $recurrenceId,
+											 bool $isRecurrenceException):?VEvent {
+		$vevents = $this->getAllVEventsFromVCalendar($vcalendar);
+		if (count($vevents) === 0) {
+			return null;
+		}
+
+		$uid = (string) $vevents[0]->UID;
+		$recurrenceExceptions = $this->getRecurrenceExceptionFromListOfVEvents($vevents);
+		$masterItem = $this->getMasterItemFromListOfVEvents($vevents);
+
+		// Handle recurrence-exceptions first, because recurrence-expansion is expensive
+		if ($isRecurrenceException) {
+			foreach($recurrenceExceptions as $recurrenceException) {
+				if ($this->getEffectiveRecurrenceIdOfVEvent($recurrenceException) === $recurrenceId) {
+					return $recurrenceException;
+				}
+			}
+
+			return null;
+		}
+
+		if ($masterItem) {
+			try {
+				$iterator = new EventIterator($vevents, $uid);
+			} catch (NoInstancesException $e) {
+				// This event is recurring, but it doesn't have a single
+				// instance. We are skipping this event from the output
+				// entirely.
+				return null;
+			}
+
+			while ($iterator->valid()) {
+				$event = $iterator->getEventObject();
+
+				// Recurrence-exceptions are handled separately, so just ignore them here
+				if (\in_array($event, $recurrenceExceptions, true)) {
+					$iterator->next();
+					continue;
+				}
+
+				if ($this->getEffectiveRecurrenceIdOfVEvent($event) === $recurrenceId) {
+					return $event;
+				}
+
+				$iterator->next();
+			}
+		}
+
+		return null;
+	}
+
+	/**
+	 * @param VEvent $vevent
+	 * @return string
+	 */
+	private function getStatusOfEvent(VEvent $vevent):string {
+		if ($vevent->STATUS) {
+			return (string) $vevent->STATUS;
+		}
+
+		// Doesn't say so in the standard,
+		// but we consider events without a status
+		// to be confirmed
+		return 'CONFIRMED';
+	}
+
+	/**
+	 * @param VObject\Component\VEvent $vevent
+	 * @return bool
+	 */
+	private function wasEventCancelled(VObject\Component\VEvent $vevent):bool {
+		return $this->getStatusOfEvent($vevent) === 'CANCELLED';
+	}
+
+	/**
+	 * @param string $calendarData
+	 * @return VObject\Component\VCalendar|null
+	 */
+	private function parseCalendarData(string $calendarData):?VObject\Component\VCalendar {
+		try {
+			return VObject\Reader::read($calendarData,
+				VObject\Reader::OPTION_FORGIVING);
+		} catch(ParseException $ex) {
+			return null;
+		}
+	}
+
+	/**
+	 * @param string $principalUri
+	 * @return IUser|null
+	 */
+	private function getUserFromPrincipalURI(string $principalUri):?IUser {
+		if (!$principalUri) {
+			return null;
+		}
+
+		if (stripos($principalUri, 'principals/users/') !== 0) {
+			return null;
+		}
+
+		$userId = substr($principalUri, 17);
+		return $this->userManager->get($userId);
+	}
+
+	/**
+	 * @param VObject\Component\VCalendar $vcalendar
+	 * @return VObject\Component\VEvent[]
+	 */
+	private function getAllVEventsFromVCalendar(VObject\Component\VCalendar $vcalendar):array {
+		$vevents = [];
+
+		foreach($vcalendar->children() as $child) {
+			if (!($child instanceof VObject\Component)) {
+				continue;
+			}
+
+			if ($child->name !== 'VEVENT') {
+				continue;
+			}
+
+			$vevents[] = $child;
+		}
+
+		return $vevents;
+	}
+
+	/**
+	 * @param array $vevents
+	 * @return VObject\Component\VEvent[]
+	 */
+	private function getRecurrenceExceptionFromListOfVEvents(array $vevents):array {
+		return array_values(array_filter($vevents, function(VEvent $vevent) {
+			return $vevent->{'RECURRENCE-ID'} !== null;
+		}));
+	}
+
+	/**
+	 * @param array $vevents
+	 * @return VEvent|null
+	 */
+	private function getMasterItemFromListOfVEvents(array $vevents):?VEvent {
+		$elements = array_values(array_filter($vevents, function(VEvent $vevent) {
+			return $vevent->{'RECURRENCE-ID'} === null;
+		}));
+
+		if (count($elements) === 0) {
+			return null;
+		}
+		if (count($elements) > 1) {
+			throw new \TypeError('Multiple master objects');
+		}
+
+		return $elements[0];
+	}
+
+	/**
+	 * @param VAlarm $valarm
+	 * @return bool
+	 */
+	private function isAlarmRelative(VAlarm $valarm):bool {
+		$trigger = $valarm->TRIGGER;
+		return $trigger instanceof VObject\Property\ICalendar\Duration;
+	}
+
+	/**
+	 * @param VEvent $vevent
+	 * @return int
+	 */
+	private function getEffectiveRecurrenceIdOfVEvent(VEvent $vevent):int {
+		if (isset($vevent->{'RECURRENCE-ID'})) {
+			return $vevent->{'RECURRENCE-ID'}->getDateTime()->getTimestamp();
+		}
+
+		return $vevent->DTSTART->getDateTime()->getTimestamp();
+	}
+
+	/**
+	 * @param VEvent $vevent
+	 * @return bool
+	 */
+	private function isRecurring(VEvent $vevent):bool {
+		return isset($vevent->RRULE) || isset($vevent->RDATE);
+	}
+}

apps/dav/lib/CalDAV/ResourceBooking/AbstractPrincipalBackend.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * @copyright 2018, Georg Ehrke <oc.list@georgehrke.com>
+ * @copyright 2019, Georg Ehrke <oc.list@georgehrke.com>
  *
  * @author Georg Ehrke <oc.list@georgehrke.com>
  *
@@ -22,6 +22,8 @@
  */
 namespace OCA\DAV\CalDAV\ResourceBooking;
 
+use OCA\DAV\CalDAV\Proxy\ProxyMapper;
+use OCA\DAV\Traits\PrincipalProxyTrait;
 use OCP\IDBConnection;
 use OCP\IGroupManager;
 use OCP\ILogger;
@@ -44,12 +46,21 @@ abstract class AbstractPrincipalBackend implements BackendInterface {
 	/** @var ILogger */
 	private $logger;
 
+	/** @var ProxyMapper */
+	private $proxyMapper;
+
 	/** @var string */
 	private $principalPrefix;
 
 	/** @var string */
 	private $dbTableName;
 
+	/** @var string */
+	private $dbMetaDataTableName;
+
+	/** @var string */
+	private $dbForeignKeyName;
+
 	/** @var string */
 	private $cuType;
 
@@ -66,6 +77,7 @@ abstract class AbstractPrincipalBackend implements BackendInterface {
 								IUserSession $userSession,
 								IGroupManager $groupManager,
 								ILogger $logger,
+								ProxyMapper $proxyMapper,
 								string $principalPrefix,
 								string $dbPrefix,
 								string $cuType) {
@@ -73,11 +85,16 @@ abstract class AbstractPrincipalBackend implements BackendInterface {
 		$this->userSession = $userSession;
 		$this->groupManager = $groupManager;
 		$this->logger = $logger;
+		$this->proxyMapper = $proxyMapper;
 		$this->principalPrefix = $principalPrefix;
-		$this->dbTableName = 'calendar_' . $dbPrefix;
+		$this->dbTableName = 'calendar_' . $dbPrefix . 's';
+		$this->dbMetaDataTableName = $this->dbTableName . '_md';
+		$this->dbForeignKeyName = $dbPrefix . '_id';
 		$this->cuType = $cuType;
 	}
 
+	use PrincipalProxyTrait;
+
 	/**
 	 * Returns a list of principals based on a prefix.
 	 *
@@ -100,8 +117,31 @@ abstract class AbstractPrincipalBackend implements BackendInterface {
 				->from($this->dbTableName);
 			$stmt = $query->execute();
 
+			$metaDataQuery = $this->db->getQueryBuilder();
+			$metaDataQuery->select([$this->dbForeignKeyName, 'key', 'value'])
+				->from($this->dbMetaDataTableName);
+			$metaDataStmt = $metaDataQuery->execute();
+			$metaDataRows = $metaDataStmt->fetchAll(\PDO::FETCH_ASSOC);
+
+			$metaDataById = [];
+			foreach($metaDataRows as $metaDataRow) {
+				if (!isset($metaDataById[$metaDataRow[$this->dbForeignKeyName]])) {
+					$metaDataById[$metaDataRow[$this->dbForeignKeyName]] = [];
+				}
+
+				$metaDataById[$metaDataRow[$this->dbForeignKeyName]][$metaDataRow['key']] =
+					$metaDataRow['value'];
+			}
+
 			while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-				$principals[] = $this->rowToPrincipal($row);
+				$id = $row['id'];
+
+				if (isset($metaDataById[$id])) {
+					$principals[] = $this->rowToPrincipal($row, $metaDataById[$id]);
+				} else {
+					$principals[] = $this->rowToPrincipal($row);
+				}
+
 			}
 
 			$stmt->closeCursor();
@@ -138,40 +178,50 @@ abstract class AbstractPrincipalBackend implements BackendInterface {
 			return null;
 		}
 
-		return $this->rowToPrincipal($row);
+		$metaDataQuery = $this->db->getQueryBuilder();
+		$metaDataQuery->select(['key', 'value'])
+			->from($this->dbMetaDataTableName)
+			->where($metaDataQuery->expr()->eq($this->dbForeignKeyName, $metaDataQuery->createNamedParameter($row['id'])));
+		$metaDataStmt = $metaDataQuery->execute();
+		$metaDataRows = $metaDataStmt->fetchAll(\PDO::FETCH_ASSOC);
+		$metadata = [];
+
+		foreach($metaDataRows as $metaDataRow) {
+			$metadata[$metaDataRow['key']] = $metaDataRow['value'];
+		}
+
+		return $this->rowToPrincipal($row, $metadata);
 	}
 
 	/**
-	 * Returns the list of members for a group-principal
-	 *
-	 * @param string $principal
-	 * @return string[]
+	 * @param int $id
+	 * @return array|null
 	 */
-	public function getGroupMemberSet($principal) {
-		return [];
-	}
+	public function getPrincipalById($id):?array {
+		$query = $this->db->getQueryBuilder();
+		$query->select(['id', 'backend_id', 'resource_id', 'email', 'displayname'])
+			->from($this->dbTableName)
+			->where($query->expr()->eq('id', $query->createNamedParameter($id)));
+		$stmt = $query->execute();
+		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
 
-	/**
-	 * Returns the list of groups a principal is a member of
-	 *
-	 * @param string $principal
-	 * @return array
-	 */
-	public function getGroupMembership($principal) {
-		return [];
-	}
+		if(!$row) {
+			return null;
+		}
 
-	/**
-	 * Updates the list of group members for a group principal.
-	 *
-	 * The principals should be passed as a list of uri's.
-	 *
-	 * @param string $principal
-	 * @param string[] $members
-	 * @throws Exception
-	 */
-	public function setGroupMemberSet($principal, array $members) {
-		throw new Exception('Setting members of the group is not supported yet');
+		$metaDataQuery = $this->db->getQueryBuilder();
+		$metaDataQuery->select(['key', 'value'])
+			->from($this->dbMetaDataTableName)
+			->where($metaDataQuery->expr()->eq($this->dbForeignKeyName, $metaDataQuery->createNamedParameter($row['id'])));
+		$metaDataStmt = $metaDataQuery->execute();
+		$metaDataRows = $metaDataStmt->fetchAll(\PDO::FETCH_ASSOC);
+		$metadata = [];
+
+		foreach($metaDataRows as $metaDataRow) {
+			$metadata[$metaDataRow['key']] = $metaDataRow['value'];
+		}
+
+		return $this->rowToPrincipal($row, $metadata);
 	}
 
 	/**
@@ -253,7 +303,15 @@ abstract class AbstractPrincipalBackend implements BackendInterface {
 					break;
 
 				default:
-					$results[] = [];
+					$rowsByMetadata = $this->searchPrincipalsByMetadataKey($prop, $value);
+					$filteredRows = array_filter($rowsByMetadata, function($row) use ($usersGroups) {
+						return $this->isAllowedToAccessResource($row, $usersGroups);
+					});
+
+					$results[] = array_map(function($row) {
+						return $row['uri'];
+					}, $filteredRows);
+
 					break;
 			}
 		}
@@ -274,6 +332,39 @@ abstract class AbstractPrincipalBackend implements BackendInterface {
 		}
 	}
 
+	/**
+	 * Searches principals based on their metadata keys.
+	 * This allows to search for all principals with a specific key.
+	 * e.g.:
+	 * '{http://nextcloud.com/ns}room-building-address' => 'ABC Street 123, ...'
+	 *
+	 * @param $key
+	 * @param $value
+	 * @return array
+	 */
+	private function searchPrincipalsByMetadataKey($key, $value):array {
+		$query = $this->db->getQueryBuilder();
+		$query->select([$this->dbForeignKeyName])
+			->from($this->dbMetaDataTableName)
+			->where($query->expr()->eq('key', $query->createNamedParameter($key)))
+			->andWhere($query->expr()->iLike('value', $query->createNamedParameter('%' . $this->db->escapeLikeParameter($value) . '%')));
+		$stmt = $query->execute();
+
+		$rows = [];
+		while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+			$id = $row[$this->dbForeignKeyName];
+
+			$principalRow = $this->getPrincipalById($id);
+			if (!$principalRow) {
+				continue;
+			}
+
+			$rows[] = $principalRow;
+		}
+
+		return $rows;
+	}
+
 	/**
 	 * @param string $uri
 	 * @param string $principalPrefix
@@ -338,14 +429,18 @@ abstract class AbstractPrincipalBackend implements BackendInterface {
 
 	/**
 	 * convert database row to principal
+	 *
+	 * @param String[] $row
+	 * @param String[] $metadata
+	 * @return Array
 	 */
-	private function rowToPrincipal($row) {
-		return [
+	private function rowToPrincipal(array $row, array $metadata=[]):array {
+		return array_merge([
 			'uri' => $this->principalPrefix . '/' . $row['backend_id'] . '-' . $row['resource_id'],
 			'{DAV:}displayname' => $row['displayname'],
 			'{http://sabredav.org/ns}email-address' => $row['email'],
 			'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => $this->cuType,
-		];
+		], $metadata);
 	}
 
 	/**
@@ -353,7 +448,7 @@ abstract class AbstractPrincipalBackend implements BackendInterface {
 	 * @param $userGroups
 	 * @return bool
 	 */
-	private function isAllowedToAccessResource($row, $userGroups) {
+	private function isAllowedToAccessResource(array $row, array $userGroups):bool {
 		if (!isset($row['group_restrictions']) ||
 			$row['group_restrictions'] === null ||
 			$row['group_restrictions'] === '') {

apps/dav/lib/CalDAV/ResourceBooking/ResourcePrincipalBackend.php

@@ -22,24 +22,34 @@
  */
 namespace OCA\DAV\CalDAV\ResourceBooking;
 
+use OCA\DAV\CalDAV\Proxy\ProxyMapper;
 use OCP\IDBConnection;
 use OCP\IGroupManager;
 use OCP\ILogger;
 use OCP\IUserSession;
 
+/**
+ * Class ResourcePrincipalBackend
+ *
+ * @package OCA\DAV\CalDAV\ResourceBooking
+ */
 class ResourcePrincipalBackend extends AbstractPrincipalBackend {
 
 	/**
+	 * ResourcePrincipalBackend constructor.
+	 *
 	 * @param IDBConnection $dbConnection
 	 * @param IUserSession $userSession
 	 * @param IGroupManager $groupManager
 	 * @param ILogger $logger
+	 * @param ProxyMapper $proxyMapper
 	 */
 	public function __construct(IDBConnection $dbConnection,
 								IUserSession $userSession,
 								IGroupManager $groupManager,
-								ILogger $logger) {
+								ILogger $logger,
+								ProxyMapper $proxyMapper) {
 		parent::__construct($dbConnection, $userSession, $groupManager, $logger,
-			'principals/calendar-resources', 'resources', 'RESOURCE');
+			$proxyMapper, 'principals/calendar-resources', 'resource', 'RESOURCE');
 	}
 }

apps/dav/lib/CalDAV/ResourceBooking/RoomPrincipalBackend.php

@@ -22,24 +22,34 @@
  */
 namespace OCA\DAV\CalDAV\ResourceBooking;
 
+use OCA\DAV\CalDAV\Proxy\ProxyMapper;
 use OCP\IDBConnection;
 use OCP\IGroupManager;
 use OCP\ILogger;
 use OCP\IUserSession;
 
+/**
+ * Class RoomPrincipalBackend
+ *
+ * @package OCA\DAV\CalDAV\ResourceBooking
+ */
 class RoomPrincipalBackend extends AbstractPrincipalBackend {
 
 	/**
+	 * RoomPrincipalBackend constructor.
+	 *
 	 * @param IDBConnection $dbConnection
 	 * @param IUserSession $userSession
 	 * @param IGroupManager $groupManager
 	 * @param ILogger $logger
+	 * @param ProxyMapper $proxyMapper
 	 */
 	public function __construct(IDBConnection $dbConnection,
 								IUserSession $userSession,
 								IGroupManager $groupManager,
-								ILogger $logger) {
+								ILogger $logger,
+								ProxyMapper $proxyMapper) {
 		parent::__construct($dbConnection, $userSession, $groupManager, $logger,
-			'principals/calendar-rooms', 'rooms', 'ROOM');
+			$proxyMapper, 'principals/calendar-rooms', 'room', 'ROOM');
 	}
 }

apps/dav/lib/CalDAV/Schedule/IMipPlugin.php

@@ -239,9 +239,42 @@ class IMipPlugin extends SabreIMipPlugin {
 			$meetingAttendeeName, $meetingInviteeName);
 		$this->addBulletList($template, $l10n, $meetingWhen, $meetingLocation,
 			$meetingDescription, $meetingUrl);
-		$this->addResponseButtons($template, $l10n, $iTipMessage, $lastOccurrence);
+
+
+		// Only add response buttons to invitation requests: Fix Issue #11230
+		if (($method == self::METHOD_REQUEST) && $this->getAttendeeRSVP($attendee)) {
+
+			/*
+			** Only offer invitation accept/reject buttons, which link back to the
+			** nextcloud server, to recipients who can access the nextcloud server via
+			** their internet/intranet.  Issue #12156
+			**
+			** The app setting is stored in the appconfig database table.
+			**
+			** For nextcloud servers accessible to the public internet, the default
+			** "invitation_link_recipients" value "yes" (all recipients) is appropriate.
+			**
+			** When the nextcloud server is restricted behind a firewall, accessible
+			** only via an internal network or via vpn, you can set "dav.invitation_link_recipients"
+			** to the email address or email domain, or comma separated list of addresses or domains,
+			** of recipients who can access the server.
+			**
+			** To always deliver URLs, set invitation_link_recipients to "yes".
+			** To suppress URLs entirely, set invitation_link_recipients to boolean "no".
+			*/
+
+			$recipientDomain = substr(strrchr($recipient, "@"), 1);
+			$invitationLinkRecipients = explode(',', preg_replace('/\s+/', '', strtolower($this->config->getAppValue('dav', 'invitation_link_recipients', 'yes'))));
+
+			if (strcmp('yes', $invitationLinkRecipients[0]) === 0
+				 || in_array(strtolower($recipient), $invitationLinkRecipients)
+				 || in_array(strtolower($recipientDomain), $invitationLinkRecipients)) {
+				$this->addResponseButtons($template, $l10n, $iTipMessage, $lastOccurrence);
+			}
+		}
 
 		$template->addFooter();
+
 		$message->useTemplate($template);
 
 		$attachment = $this->mailer->createAttachment(
@@ -345,6 +378,21 @@ class IMipPlugin extends SabreIMipPlugin {
 		return $default;
 	}
 
+	/**
+	 * @param Property|null $attendee
+	 * @return bool
+	 */
+	private function getAttendeeRSVP(Property $attendee = null) {
+		if ($attendee !== null) {
+			$rsvp = $attendee->offsetGet('RSVP');
+			if (($rsvp instanceof Parameter) && (strcasecmp($rsvp->getValue(), 'TRUE') === 0)) {
+				return true;
+			}
+		}
+		// RFC 5545 3.2.17: default RSVP is false
+		return false;
+	}
+
 	/**
 	 * @param IL10N $l10n
 	 * @param Property $dtstart
@@ -451,7 +499,6 @@ class IMipPlugin extends SabreIMipPlugin {
 			$template->setSubject('Invitation: ' . $summary);
 			$template->addHeading($l10n->t('%1$s invited you to »%2$s«', [$inviteeName, $summary]), $l10n->t('Hello %s,', [$attendeeName]));
 		}
-
 	}
 
 	/**
@@ -508,7 +555,7 @@ class IMipPlugin extends SabreIMipPlugin {
 			$moreOptionsURL, $l10n->t('More options …')
 		]);
 		$text = $l10n->t('More options at %s', [$moreOptionsURL]);
-		
+
 		$template->addBodyText($html, $text);
 	}
 

apps/dav/lib/CalDAV/Schedule/Plugin.php

@@ -24,20 +24,36 @@
  */
 namespace OCA\DAV\CalDAV\Schedule;
 
+use DateTimeZone;
 use OCA\DAV\CalDAV\CalDavBackend;
 use OCA\DAV\CalDAV\CalendarHome;
+use Sabre\CalDAV\ICalendar;
 use Sabre\DAV\INode;
+use Sabre\DAV\IProperties;
 use Sabre\DAV\PropFind;
 use Sabre\DAV\Server;
 use Sabre\DAV\Xml\Property\LocalHref;
 use Sabre\DAVACL\IPrincipal;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
+use Sabre\VObject\Component;
 use Sabre\VObject\Component\VCalendar;
+use Sabre\VObject\Component\VEvent;
+use Sabre\VObject\DateTimeParser;
+use Sabre\VObject\ITip;
+use Sabre\VObject\Parameter;
+use Sabre\VObject\Property;
 use Sabre\VObject\Reader;
+use Sabre\VObject\FreeBusyGenerator;
 
 class Plugin extends \Sabre\CalDAV\Schedule\Plugin {
 
+	/** @var ITip\Message[] */
+	private $schedulingResponses = [];
+
+	/** @var string|null */
+	private $pathOfCalendarObjectChange = null;
+
 	/**
 	 * Initializes the plugin
 	 *
@@ -47,6 +63,8 @@ class Plugin extends \Sabre\CalDAV\Schedule\Plugin {
 	function initialize(Server $server) {
 		parent::initialize($server);
 		$server->on('propFind', [$this, 'propFindDefaultCalendarUrl'], 90);
+		$server->on('afterWriteContent', [$this, 'dispatchSchedulingResponses']);
+		$server->on('afterCreateFile', [$this, 'dispatchSchedulingResponses']);
 	}
 
 	/**
@@ -59,17 +77,21 @@ class Plugin extends \Sabre\CalDAV\Schedule\Plugin {
 	 * @return void
 	 */
 	function propFind(PropFind $propFind, INode $node) {
-		// overwrite Sabre/Dav's implementation
-		$propFind->handle('{' . self::NS_CALDAV . '}calendar-user-type', function() use ($node) {
-			$calendarUserType = '{' . self::NS_CALDAV . '}calendar-user-type';
-			$props = $node->getProperties([$calendarUserType]);
+		if ($node instanceof IPrincipal) {
+			// overwrite Sabre/Dav's implementation
+			$propFind->handle('{' . self::NS_CALDAV . '}calendar-user-type', function () use ($node) {
+				if ($node instanceof IProperties) {
+					$calendarUserType = '{' . self::NS_CALDAV . '}calendar-user-type';
+					$props = $node->getProperties([$calendarUserType]);
 
-			if (isset($props[$calendarUserType])) {
-				return $props[$calendarUserType];
-			}
+					if (isset($props[$calendarUserType])) {
+						return $props[$calendarUserType];
+					}
+				}
 
-			return 'INDIVIDUAL';
-		});
+				return 'INDIVIDUAL';
+			});
+		}
 
 		parent::propFind($propFind, $node);
 	}
@@ -90,6 +112,144 @@ class Plugin extends \Sabre\CalDAV\Schedule\Plugin {
 		return $result;
 	}
 
+	/**
+	 * @param RequestInterface $request
+	 * @param ResponseInterface $response
+	 * @param VCalendar $vCal
+	 * @param mixed $calendarPath
+	 * @param mixed $modified
+	 * @param mixed $isNew
+	 */
+	public function calendarObjectChange(RequestInterface $request, ResponseInterface $response, VCalendar $vCal, $calendarPath, &$modified, $isNew) {
+		// Save the first path we get as a calendar-object-change request
+		if (!$this->pathOfCalendarObjectChange) {
+			$this->pathOfCalendarObjectChange = $request->getPath();
+		}
+
+		parent::calendarObjectChange($request, $response, $vCal, $calendarPath, $modified, $isNew);
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function scheduleLocalDelivery(ITip\Message $iTipMessage):void {
+		parent::scheduleLocalDelivery($iTipMessage);
+
+		// We only care when the message was successfully delivered locally
+		if ($iTipMessage->scheduleStatus !== '1.2;Message delivered locally') {
+			return;
+		}
+
+		// We only care about request. reply and cancel are properly handled
+		// by parent::scheduleLocalDelivery already
+		if (strcasecmp($iTipMessage->method, 'REQUEST') !== 0) {
+			return;
+		}
+
+		// If parent::scheduleLocalDelivery set scheduleStatus to 1.2,
+		// it means that it was successfully delivered locally.
+		// Meaning that the ACL plugin is loaded and that a principial
+		// exists for the given recipient id, no need to double check
+		/** @var \Sabre\DAVACL\Plugin $aclPlugin */
+		$aclPlugin = $this->server->getPlugin('acl');
+		$principalUri = $aclPlugin->getPrincipalByUri($iTipMessage->recipient);
+		$calendarUserType = $this->getCalendarUserTypeForPrincipal($principalUri);
+		if (strcasecmp($calendarUserType, 'ROOM') !== 0 && strcasecmp($calendarUserType, 'RESOURCE') !== 0) {
+			return;
+		}
+
+		$attendee = $this->getCurrentAttendee($iTipMessage);
+		if (!$attendee) {
+			return;
+		}
+
+		// We only respond when a response was actually requested
+		$rsvp = $this->getAttendeeRSVP($attendee);
+		if (!$rsvp) {
+			return;
+		}
+
+		if (!isset($iTipMessage->message)) {
+			return;
+		}
+
+		$vcalendar = $iTipMessage->message;
+		if (!isset($vcalendar->VEVENT)) {
+			return;
+		}
+
+		/** @var Component $vevent */
+		$vevent = $vcalendar->VEVENT;
+
+		// We don't support autoresponses for recurrencing events for now
+		if (isset($vevent->RRULE) || isset($vevent->RDATE)) {
+			return;
+		}
+
+		$dtstart = $vevent->DTSTART;
+		$dtend =  $this->getDTEndFromVEvent($vevent);
+		$uid = $vevent->UID->getValue();
+		$sequence = isset($vevent->SEQUENCE) ? $vevent->SEQUENCE->getValue() : 0;
+		$recurrenceId = isset($vevent->{'RECURRENCE-ID'}) ? $vevent->{'RECURRENCE-ID'}->serialize() : '';
+
+		$message = <<<EOF
+BEGIN:VCALENDAR
+PRODID:-//Nextcloud/Nextcloud CalDAV Server//EN
+METHOD:REPLY
+VERSION:2.0
+BEGIN:VEVENT
+ATTENDEE;PARTSTAT=%s:%s
+ORGANIZER:%s
+UID:%s
+SEQUENCE:%s
+REQUEST-STATUS:2.0;Success
+%sEND:VEVENT
+END:VCALENDAR
+EOF;
+
+		if ($this->isAvailableAtTime($attendee->getValue(), $dtstart->getDateTime(), $dtend->getDateTime(), $uid)) {
+			$partStat = 'ACCEPTED';
+		} else {
+			$partStat = 'DECLINED';
+		}
+
+		$vObject = Reader::read(vsprintf($message, [
+			$partStat,
+			$iTipMessage->recipient,
+			$iTipMessage->sender,
+			$uid,
+			$sequence,
+			$recurrenceId
+		]));
+
+		$responseITipMessage = new ITip\Message();
+		$responseITipMessage->uid = $uid;
+		$responseITipMessage->component = 'VEVENT';
+		$responseITipMessage->method = 'REPLY';
+		$responseITipMessage->sequence = $sequence;
+		$responseITipMessage->sender = $iTipMessage->recipient;
+		$responseITipMessage->recipient = $iTipMessage->sender;
+		$responseITipMessage->message = $vObject;
+
+		// We can't dispatch them now already, because the organizers calendar-object
+		// was not yet created. Hence Sabre/DAV won't find a calendar-object, when we
+		// send our reply.
+		$this->schedulingResponses[] = $responseITipMessage;
+	}
+
+	/**
+	 * @param string $uri
+	 */
+	public function dispatchSchedulingResponses(string $uri):void {
+		if ($uri !== $this->pathOfCalendarObjectChange) {
+			return;
+		}
+
+		foreach ($this->schedulingResponses as $schedulingResponse) {
+			$this->scheduleLocalDelivery($schedulingResponse);
+		}
+	}
+
 	/**
 	 * Always use the personal calendar as target for scheduled events
 	 *
@@ -141,65 +301,236 @@ class Plugin extends \Sabre\CalDAV\Schedule\Plugin {
 	}
 
 	/**
-	 * This method is triggered whenever there was a calendar object gets
-	 * created or updated.
+	 * Returns a list of addresses that are associated with a principal.
 	 *
-	 * Basically just a copy of parent::calendarObjectChange, with the change
-	 * from:
-	 * $addresses = $this->getAddressesForPrincipal($calendarNode->getOwner());
-	 * to:
-	 * $addresses = $this->getAddressesForPrincipal($calendarNode->getPrincipalURI());
-	 *
-	 * @param RequestInterface $request HTTP request
-	 * @param ResponseInterface $response HTTP Response
-	 * @param VCalendar $vCal Parsed iCalendar object
-	 * @param mixed $calendarPath Path to calendar collection
-	 * @param mixed $modified The iCalendar object has been touched.
-	 * @param mixed $isNew Whether this was a new item or we're updating one
-	 * @return void
+	 * @param string $principal
+	 * @return string?
 	 */
-	function calendarObjectChange(RequestInterface $request, ResponseInterface $response, VCalendar $vCal, $calendarPath, &$modified, $isNew) {
-
-		if (!$this->scheduleReply($this->server->httpRequest)) {
-			return;
-		}
-
-		$calendarNode = $this->server->tree->getNodeForPath($calendarPath);
-
-		$addresses = $this->getAddressesForPrincipal(
-			$calendarNode->getPrincipalURI()
+	protected function getCalendarUserTypeForPrincipal($principal):?string {
+		$calendarUserType = '{' . self::NS_CALDAV . '}calendar-user-type';
+		$properties = $this->server->getProperties(
+			$principal,
+			[$calendarUserType]
 		);
 
-		if (!$isNew) {
-			$node = $this->server->tree->getNodeForPath($request->getPath());
-			$oldObj = Reader::read($node->get());
-		} else {
-			$oldObj = null;
-		}
-
-		$this->processICalendarChange($oldObj, $vCal, $addresses, [], $modified);
-
-		if ($oldObj) {
-			// Destroy circular references so PHP will GC the object.
-			$oldObj->destroy();
+		// If we can't find this information, we'll stop processing
+		if (!isset($properties[$calendarUserType])) {
+			return null;
 		}
 
+		return $properties[$calendarUserType];
 	}
 
 	/**
-	 * This method checks the 'Schedule-Reply' header
-	 * and returns false if it's 'F', otherwise true.
-	 *
-	 * Copied from Sabre/DAV's Schedule plugin, because it's
-	 * private for whatever reason
-	 *
-	 * @param RequestInterface $request
+	 * @param ITip\Message $iTipMessage
+	 * @return null|Property
+	 */
+	private function getCurrentAttendee(ITip\Message $iTipMessage):?Property {
+		/** @var VEvent $vevent */
+		$vevent = $iTipMessage->message->VEVENT;
+		$attendees = $vevent->select('ATTENDEE');
+		foreach ($attendees as $attendee) {
+			/** @var Property $attendee */
+			if (strcasecmp($attendee->getValue(), $iTipMessage->recipient) === 0) {
+				return $attendee;
+			}
+		}
+		return null;
+	}
+
+	/**
+	 * @param Property|null $attendee
 	 * @return bool
 	 */
-	private function scheduleReply(RequestInterface $request) {
+	private function getAttendeeRSVP(Property $attendee = null):bool {
+		if ($attendee !== null) {
+			$rsvp = $attendee->offsetGet('RSVP');
+			if (($rsvp instanceof Parameter) && (strcasecmp($rsvp->getValue(), 'TRUE') === 0)) {
+				return true;
+			}
+		}
+		// RFC 5545 3.2.17: default RSVP is false
+		return false;
+	}
 
-		$scheduleReply = $request->getHeader('Schedule-Reply');
-		return $scheduleReply !== 'F';
+	/**
+	 * @param VEvent $vevent
+	 * @return Property\ICalendar\DateTime
+	 */
+	private function getDTEndFromVEvent(VEvent $vevent):Property\ICalendar\DateTime {
+		if (isset($vevent->DTEND)) {
+			return $vevent->DTEND;
+		}
 
+		if (isset($vevent->DURATION)) {
+			$isFloating = $vevent->DTSTART->isFloating();
+			/** @var Property\ICalendar\DateTime $end */
+			$end = clone $vevent->DTSTART;
+			$endDateTime = $end->getDateTime();
+			$endDateTime = $endDateTime->add(DateTimeParser::parse($vevent->DURATION->getValue()));
+			$end->setDateTime($endDateTime, $isFloating);
+			return $end;
+		}
+
+		if (!$vevent->DTSTART->hasTime()) {
+			$isFloating = $vevent->DTSTART->isFloating();
+			/** @var Property\ICalendar\DateTime $end */
+			$end = clone $vevent->DTSTART;
+			$endDateTime = $end->getDateTime();
+			$endDateTime = $endDateTime->modify('+1 day');
+			$end->setDateTime($endDateTime, $isFloating);
+			return $end;
+		}
+
+		return clone $vevent->DTSTART;
+	}
+
+	/**
+	 * @param string $email
+	 * @param \DateTimeInterface $start
+	 * @param \DateTimeInterface $end
+	 * @param string $ignoreUID
+	 * @return bool
+	 */
+	private function isAvailableAtTime(string $email, \DateTimeInterface $start, \DateTimeInterface $end, string $ignoreUID):bool {
+		// This method is heavily inspired by Sabre\CalDAV\Schedule\Plugin::scheduleLocalDelivery
+		// and Sabre\CalDAV\Schedule\Plugin::getFreeBusyForEmail
+
+		$aclPlugin = $this->server->getPlugin('acl');
+		$this->server->removeListener('propFind', [$aclPlugin, 'propFind']);
+
+		$result = $aclPlugin->principalSearch(
+			['{http://sabredav.org/ns}email-address' => $this->stripOffMailTo($email)],
+			[
+				'{DAV:}principal-URL',
+				'{' . self::NS_CALDAV . '}calendar-home-set',
+				'{' . self::NS_CALDAV . '}schedule-inbox-URL',
+				'{http://sabredav.org/ns}email-address',
+
+			]
+		);
+		$this->server->on('propFind', [$aclPlugin, 'propFind'], 20);
+
+
+		// Grabbing the calendar list
+		$objects = [];
+		$calendarTimeZone = new DateTimeZone('UTC');
+
+		$homePath = $result[0][200]['{' . self::NS_CALDAV . '}calendar-home-set']->getHref();
+		foreach ($this->server->tree->getNodeForPath($homePath)->getChildren() as $node) {
+			if (!$node instanceof ICalendar) {
+				continue;
+			}
+
+			// Getting the list of object uris within the time-range
+			$urls = $node->calendarQuery([
+				'name' => 'VCALENDAR',
+				'comp-filters' => [
+					[
+						'name' => 'VEVENT',
+						'is-not-defined' => false,
+						'time-range' => [
+							'start' => $start,
+							'end' => $end,
+						],
+						'comp-filters'   => [],
+						'prop-filters'   => [],
+					],
+					[
+						'name' => 'VEVENT',
+						'is-not-defined' => false,
+						'time-range' => null,
+						'comp-filters'   => [],
+						'prop-filters'   => [
+							[
+								'name'           => 'UID',
+								'is-not-defined' => false,
+								'time-range'     => null,
+								'text-match'     => [
+									'value' => $ignoreUID,
+									'negate-condition' => true,
+									'collation' => 'i;octet',
+								],
+								'param-filters' => [],
+							],
+						]
+					],
+				],
+				'prop-filters' => [],
+				'is-not-defined' => false,
+				'time-range' => null,
+			]);
+
+			foreach ($urls as $url) {
+				$objects[] = $node->getChild($url)->get();
+			}
+		}
+
+		$inboxProps = $this->server->getProperties(
+			$result[0][200]['{' . self::NS_CALDAV . '}schedule-inbox-URL']->getHref(),
+			['{' . self::NS_CALDAV . '}calendar-availability']
+		);
+
+		$vcalendar = new VCalendar();
+		$vcalendar->METHOD = 'REPLY';
+
+		$generator = new FreeBusyGenerator();
+		$generator->setObjects($objects);
+		$generator->setTimeRange($start, $end);
+		$generator->setBaseObject($vcalendar);
+		$generator->setTimeZone($calendarTimeZone);
+
+		if (isset($inboxProps['{' . self::NS_CALDAV . '}calendar-availability'])) {
+			$generator->setVAvailability(
+				Reader::read(
+					$inboxProps['{' . self::NS_CALDAV . '}calendar-availability']
+				)
+			);
+		}
+
+		$result = $generator->getResult();
+		if (!isset($result->VFREEBUSY)) {
+			return false;
+		}
+
+		/** @var Component $freeBusyComponent */
+		$freeBusyComponent = $result->VFREEBUSY;
+		$freeBusyProperties = $freeBusyComponent->select('FREEBUSY');
+		// If there is no Free-busy property at all, the time-range is empty and available
+		if (count($freeBusyProperties) === 0) {
+			return true;
+		}
+
+		// If more than one Free-Busy property was returned, it means that an event
+		// starts or ends inside this time-range, so it's not availabe and we return false
+		if (count($freeBusyProperties) > 1) {
+			return false;
+		}
+
+		/** @var Property $freeBusyProperty */
+		$freeBusyProperty = $freeBusyProperties[0];
+		if (!$freeBusyProperty->offsetExists('FBTYPE')) {
+			// If there is no FBTYPE, it means it's busy
+			return false;
+		}
+
+		$fbTypeParameter = $freeBusyProperty->offsetGet('FBTYPE');
+		if (!($fbTypeParameter instanceof Parameter)) {
+			return false;
+		}
+
+		return (strcasecmp($fbTypeParameter->getValue(), 'FREE') === 0);
+	}
+
+	/**
+	 * @param string $email
+	 * @return string
+	 */
+	private function stripOffMailTo(string $email): string {
+		if (stripos($email, 'mailto:')  === 0) {
+			return substr($email, 7);
+		}
+
+		return $email;
 	}
 }

apps/dav/lib/CalDAV/WebcalCaching/RefreshWebcalService.php

@@ -0,0 +1,424 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2020, Thomas Citharel <nextcloud@tcit.fr>
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ * @author Thomas Citharel <nextcloud@tcit.fr>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\DAV\CalDAV\WebcalCaching;
+
+use Exception;
+use GuzzleHttp\HandlerStack;
+use GuzzleHttp\Middleware;
+use OCA\DAV\CalDAV\CalDavBackend;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\Http\Client\IClientService;
+use OCP\IConfig;
+use OCP\ILogger;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use Sabre\DAV\Exception\BadRequest;
+use Sabre\DAV\PropPatch;
+use Sabre\DAV\Xml\Property\Href;
+use Sabre\VObject\Component;
+use Sabre\VObject\DateTimeParser;
+use Sabre\VObject\InvalidDataException;
+use Sabre\VObject\ParseException;
+use Sabre\VObject\Reader;
+use Sabre\VObject\Splitter\ICalendar;
+use Sabre\VObject\UUIDUtil;
+use function count;
+
+class RefreshWebcalService {
+
+	/** @var CalDavBackend */
+	private $calDavBackend;
+
+	/** @var IClientService */
+	private $clientService;
+
+	/** @var IConfig */
+	private $config;
+
+	/** @var ILogger */
+	private $logger;
+
+	public const REFRESH_RATE = '{http://apple.com/ns/ical/}refreshrate';
+	public const STRIP_ALARMS = '{http://calendarserver.org/ns/}subscribed-strip-alarms';
+	public const STRIP_ATTACHMENTS = '{http://calendarserver.org/ns/}subscribed-strip-attachments';
+	public const STRIP_TODOS = '{http://calendarserver.org/ns/}subscribed-strip-todos';
+
+	/**
+	 * RefreshWebcalJob constructor.
+	 *
+	 * @param CalDavBackend $calDavBackend
+	 * @param IClientService $clientService
+	 * @param IConfig $config
+	 * @param ILogger $logger
+	 */
+	public function __construct(CalDavBackend $calDavBackend, IClientService $clientService, IConfig $config, ILogger $logger) {
+		$this->calDavBackend = $calDavBackend;
+		$this->clientService = $clientService;
+		$this->config = $config;
+		$this->logger = $logger;
+	}
+
+	/**
+	 * @param string $principalUri
+	 * @param string $uri
+	 */
+	public function refreshSubscription(string $principalUri, string $uri) {
+		$subscription = $this->getSubscription($principalUri, $uri);
+		$mutations = [];
+		if (!$subscription) {
+			return;
+		}
+
+		$webcalData = $this->queryWebcalFeed($subscription, $mutations);
+		if (!$webcalData) {
+			return;
+		}
+
+		$stripTodos = ($subscription[self::STRIP_TODOS] ?? 1) === 1;
+		$stripAlarms = ($subscription[self::STRIP_ALARMS] ?? 1) === 1;
+		$stripAttachments = ($subscription[self::STRIP_ATTACHMENTS] ?? 1) === 1;
+
+		try {
+			$splitter = new ICalendar($webcalData, Reader::OPTION_FORGIVING);
+
+			// we wait with deleting all outdated events till we parsed the new ones
+			// in case the new calendar is broken and `new ICalendar` throws a ParseException
+			// the user will still see the old data
+			$this->calDavBackend->purgeAllCachedEventsForSubscription($subscription['id']);
+
+			while ($vObject = $splitter->getNext()) {
+				/** @var Component $vObject */
+				$compName = null;
+
+				foreach ($vObject->getComponents() as $component) {
+					if ($component->name === 'VTIMEZONE') {
+						continue;
+					}
+
+					$compName = $component->name;
+
+					if ($stripAlarms) {
+						unset($component->{'VALARM'});
+					}
+					if ($stripAttachments) {
+						unset($component->{'ATTACH'});
+					}
+				}
+
+				if ($stripTodos && $compName === 'VTODO') {
+					continue;
+				}
+
+				$uri = $this->getRandomCalendarObjectUri();
+				$calendarData = $vObject->serialize();
+				try {
+					$this->calDavBackend->createCalendarObject($subscription['id'], $uri, $calendarData, CalDavBackend::CALENDAR_TYPE_SUBSCRIPTION);
+				} catch(BadRequest $ex) {
+					$this->logger->logException($ex);
+				}
+			}
+
+			$newRefreshRate = $this->checkWebcalDataForRefreshRate($subscription, $webcalData);
+			if ($newRefreshRate) {
+				$mutations[self::REFRESH_RATE] = $newRefreshRate;
+			}
+
+			$this->updateSubscription($subscription, $mutations);
+		} catch(ParseException $ex) {
+			$subscriptionId = $subscription['id'];
+
+			$this->logger->logException($ex);
+			$this->logger->warning("Subscription $subscriptionId could not be refreshed due to a parsing error");
+		}
+	}
+
+	/**
+	 * loads subscription from backend
+	 *
+	 * @param string $principalUri
+	 * @param string $uri
+	 * @return array|null
+	 */
+	public function getSubscription(string $principalUri, string $uri) {
+		$subscriptions = array_values(array_filter(
+			$this->calDavBackend->getSubscriptionsForUser($principalUri),
+			function($sub) use ($uri) {
+				return $sub['uri'] === $uri;
+			}
+		));
+
+		if (count($subscriptions) === 0) {
+			return null;
+		}
+
+		return $subscriptions[0];
+	}
+
+	/**
+	 * gets webcal feed from remote server
+	 *
+	 * @param array $subscription
+	 * @param array &$mutations
+	 * @return null|string
+	 */
+	private function queryWebcalFeed(array $subscription, array &$mutations) {
+		$client = $this->clientService->newClient();
+
+		$didBreak301Chain = false;
+		$latestLocation = null;
+
+		$handlerStack = HandlerStack::create();
+		$handlerStack->push(Middleware::mapRequest(function (RequestInterface $request) {
+			return $request
+				->withHeader('Accept', 'text/calendar, application/calendar+json, application/calendar+xml')
+				->withHeader('User-Agent', 'Nextcloud Webcal Crawler');
+		}));
+		$handlerStack->push(Middleware::mapResponse(function(ResponseInterface $response) use (&$didBreak301Chain, &$latestLocation) {
+			if (!$didBreak301Chain) {
+				if ($response->getStatusCode() !== 301) {
+					$didBreak301Chain = true;
+				} else {
+					$latestLocation = $response->getHeader('Location');
+				}
+			}
+			return $response;
+		}));
+
+		$allowLocalAccess = $this->config->getAppValue('dav', 'webcalAllowLocalAccess', 'no');
+		$subscriptionId = $subscription['id'];
+		$url = $this->cleanURL($subscription['source']);
+		if ($url === null) {
+			return null;
+		}
+
+		if ($allowLocalAccess !== 'yes') {
+			$host = strtolower(parse_url($url, PHP_URL_HOST));
+			// remove brackets from IPv6 addresses
+			if (strpos($host, '[') === 0 && substr($host, -1) === ']') {
+				$host = substr($host, 1, -1);
+			}
+
+			// Disallow localhost and local network
+			if ($host === 'localhost' || substr($host, -6) === '.local' || substr($host, -10) === '.localhost') {
+				$this->logger->warning("Subscription $subscriptionId was not refreshed because it violates local access rules");
+				return null;
+			}
+
+			// Disallow hostname only
+			if (substr_count($host, '.') === 0) {
+				$this->logger->warning("Subscription $subscriptionId was not refreshed because it violates local access rules");
+				return null;
+			}
+
+			if ((bool)filter_var($host, FILTER_VALIDATE_IP) && !filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
+				$this->logger->warning("Subscription $subscriptionId was not refreshed because it violates local access rules");
+				return null;
+			}
+
+			// Also check for IPv6 IPv4 nesting, because that's not covered by filter_var
+			if ((bool)filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) && substr_count($host, '.') > 0) {
+				$delimiter = strrpos($host, ':'); // Get last colon
+				$ipv4Address = substr($host, $delimiter + 1);
+
+				if (!filter_var($ipv4Address, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
+					$this->logger->warning("Subscription $subscriptionId was not refreshed because it violates local access rules");
+					return null;
+				}
+			}
+		}
+
+		try {
+			$params = [
+				'allow_redirects' => [
+					'redirects' => 10
+				],
+				'handler' => $handlerStack,
+			];
+
+			$user = parse_url($subscription['source'], PHP_URL_USER);
+			$pass = parse_url($subscription['source'], PHP_URL_PASS);
+			if ($user !== null && $pass !== null) {
+				$params['auth'] = [$user, $pass];
+			}
+
+			$response = $client->get($url, $params);
+			$body = $response->getBody();
+
+			if ($latestLocation) {
+				$mutations['{http://calendarserver.org/ns/}source'] = new Href($latestLocation);
+			}
+
+			$contentType = $response->getHeader('Content-Type');
+			$contentType = explode(';', $contentType, 2)[0];
+			switch($contentType) {
+				case 'application/calendar+json':
+					try {
+						$jCalendar = Reader::readJson($body, Reader::OPTION_FORGIVING);
+					} catch(Exception $ex) {
+						// In case of a parsing error return null
+						$this->logger->debug("Subscription $subscriptionId could not be parsed");
+						return null;
+					}
+					return $jCalendar->serialize();
+
+				case 'application/calendar+xml':
+					try {
+						$xCalendar = Reader::readXML($body);
+					} catch(Exception $ex) {
+						// In case of a parsing error return null
+						$this->logger->debug("Subscription $subscriptionId could not be parsed");
+						return null;
+					}
+					return $xCalendar->serialize();
+
+				case 'text/calendar':
+				default:
+					try {
+						$vCalendar = Reader::read($body);
+					} catch(Exception $ex) {
+						// In case of a parsing error return null
+						$this->logger->debug("Subscription $subscriptionId could not be parsed");
+						return null;
+					}
+					return $vCalendar->serialize();
+			}
+		} catch(Exception $ex) {
+			$this->logger->logException($ex);
+			$this->logger->warning("Subscription $subscriptionId could not be refreshed due to a network error");
+
+			return null;
+		}
+	}
+
+	/**
+	 * check if:
+	 *  - current subscription stores a refreshrate
+	 *  - the webcal feed suggests a refreshrate
+	 *  - return suggested refreshrate if user didn't set a custom one
+	 *
+	 * @param array $subscription
+	 * @param string $webcalData
+	 * @return string|null
+	 */
+	private function checkWebcalDataForRefreshRate($subscription, $webcalData) {
+		// if there is no refreshrate stored in the database, check the webcal feed
+		// whether it suggests any refresh rate and store that in the database
+		if (isset($subscription[self::REFRESH_RATE]) && $subscription[self::REFRESH_RATE] !== null) {
+			return null;
+		}
+
+		/** @var Component\VCalendar $vCalendar */
+		$vCalendar = Reader::read($webcalData);
+
+		$newRefreshRate = null;
+		if (isset($vCalendar->{'X-PUBLISHED-TTL'})) {
+			$newRefreshRate = $vCalendar->{'X-PUBLISHED-TTL'}->getValue();
+		}
+		if (isset($vCalendar->{'REFRESH-INTERVAL'})) {
+			$newRefreshRate = $vCalendar->{'REFRESH-INTERVAL'}->getValue();
+		}
+
+		if (!$newRefreshRate) {
+			return null;
+		}
+
+		// check if new refresh rate is even valid
+		try {
+			DateTimeParser::parseDuration($newRefreshRate);
+		} catch(InvalidDataException $ex) {
+			return null;
+		}
+
+		return $newRefreshRate;
+	}
+
+	/**
+	 * update subscription stored in database
+	 * used to set:
+	 *  - refreshrate
+	 *  - source
+	 *
+	 * @param array $subscription
+	 * @param array $mutations
+	 */
+	private function updateSubscription(array $subscription, array $mutations) {
+		if (empty($mutations)) {
+			return;
+		}
+
+		$propPatch = new PropPatch($mutations);
+		$this->calDavBackend->updateSubscription($subscription['id'], $propPatch);
+		$propPatch->commit();
+	}
+
+	/**
+	 * This method will strip authentication information and replace the
+	 * 'webcal' or 'webcals' protocol scheme
+	 *
+	 * @param string $url
+	 * @return string|null
+	 */
+	private function cleanURL(string $url) {
+		$parsed = parse_url($url);
+		if ($parsed === false) {
+			return null;
+		}
+
+		if (isset($parsed['scheme']) && $parsed['scheme'] === 'http') {
+			$scheme = 'http';
+		} else {
+			$scheme = 'https';
+		}
+
+		$host = $parsed['host'] ?? '';
+		$port = isset($parsed['port']) ? ':' . $parsed['port'] : '';
+		$path = $parsed['path'] ?? '';
+		$query = isset($parsed['query']) ? '?' . $parsed['query'] : '';
+		$fragment = isset($parsed['fragment']) ? '#' . $parsed['fragment'] : '';
+
+		$cleanURL = "$scheme://$host$port$path$query$fragment";
+		// parse_url is giving some weird results if no url and no :// is given,
+		// so let's test the url again
+		$parsedClean = parse_url($cleanURL);
+		if ($parsedClean === false || !isset($parsedClean['host'])) {
+			return null;
+		}
+
+		return $cleanURL;
+	}
+
+	/**
+	 * Returns a random uri for a calendar-object
+	 *
+	 * @return string
+	 */
+	public function getRandomCalendarObjectUri():string {
+		return UUIDUtil::getUUID() . '.ics';
+	}
+}

apps/dav/lib/CardDAV/AddressBook.php

@@ -23,6 +23,7 @@
 namespace OCA\DAV\CardDAV;
 
 use OCA\DAV\DAV\Sharing\IShareable;
+use OCA\DAV\Exception\UnsupportedLimitOnInitialSyncException;
 use OCP\IL10N;
 use Sabre\CardDAV\Backend\BackendInterface;
 use Sabre\CardDAV\Card;
@@ -219,4 +220,12 @@ class AddressBook extends \Sabre\CardDAV\AddressBook implements IShareable {
 		}
 		return true;
 	}
+
+	public function getChanges($syncToken, $syncLevel, $limit = null) {
+		if (!$syncToken && $limit) {
+			throw new UnsupportedLimitOnInitialSyncException();
+		}
+
+		return parent::getChanges($syncToken, $syncLevel, $limit);
+	}
 }

apps/dav/lib/CardDAV/AddressBookImpl.php

@@ -2,9 +2,14 @@
 /**
  * @copyright Copyright (c) 2016, ownCloud, Inc.
  *
+ * @author Arne Hamann <kontakt+github@arne.email>
  * @author Björn Schießle <bjoern@schiessle.org>
+ * @author Daniel Kesselberg <mail@danielkesselberg.de>
  * @author Georg Ehrke <oc.list@georgehrke.com>
  * @author Joas Schilling <coding@schilljs.com>
+ * @author John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>
+ * @author Julius Härtl <jus@bitgrid.net>
+ * @author labor4 <schreibtisch@labor4.ch>
  * @author Thomas Müller <thomas.mueller@tmit.eu>
  *
  * @license AGPL-3.0
@@ -19,7 +24,7 @@
  * GNU Affero General Public License for more details.
  *
  * You should have received a copy of the GNU Affero General Public License, version 3,
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
  *
  */
 
@@ -97,20 +102,20 @@ class AddressBookImpl implements IAddressBook {
 	/**
 	 * @param string $pattern which should match within the $searchProperties
 	 * @param array $searchProperties defines the properties within the query pattern should match
-	 * @param array $options Options to define the output format
-	 * 	- types boolean (since 15.0.0) If set to true, fields that come with a TYPE property will be an array
+	 * @param array $options Options to define the output format and search behavior
+	 * 	- 'types' boolean (since 15.0.0) If set to true, fields that come with a TYPE property will be an array
 	 *    example: ['id' => 5, 'FN' => 'Thomas Tanghus', 'EMAIL' => ['type => 'HOME', 'value' => 'g@h.i']]
+	 * 	- 'escape_like_param' - If set to false wildcards _ and % are not escaped
 	 * @return array an array of contacts which are arrays of key-value-pairs
 	 *  example result:
 	 *  [
 	 *		['id' => 0, 'FN' => 'Thomas Müller', 'EMAIL' => 'a@b.c', 'GEO' => '37.386013;-122.082932'],
 	 *		['id' => 5, 'FN' => 'Thomas Tanghus', 'EMAIL' => ['d@e.f', 'g@h.i']]
 	 *	]
-	 * @return array an array of contacts which are arrays of key-value-pairs
 	 * @since 5.0.0
 	 */
 	public function search($pattern, $searchProperties, $options) {
-		$results = $this->backend->search($this->getKey(), $pattern, $searchProperties);
+		$results = $this->backend->search($this->getKey(), $pattern, $searchProperties, $options);
 
 		$withTypes = \array_key_exists('types', $options) && $options['types'] === true;
 
@@ -162,7 +167,7 @@ class AddressBookImpl implements IAddressBook {
 		$permissions = $this->addressBook->getACL();
 		$result = 0;
 		foreach ($permissions as $permission) {
-			switch($permission['privilege']) {
+			switch ($permission['privilege']) {
 				case '{DAV:}read':
 					$result |= Constants::PERMISSION_READ;
 					break;
@@ -237,6 +242,7 @@ class AddressBookImpl implements IAddressBook {
 	 *
 	 * @param string $uri
 	 * @param VCard $vCard
+	 * @param boolean $withTypes (optional) return the values as arrays of value/type pairs
 	 * @return array
 	 */
 	protected function vCard2Array($uri, VCard $vCard, $withTypes = false) {
@@ -256,20 +262,7 @@ class AddressBookImpl implements IAddressBook {
 				]) . '?photo';
 
 				$result['PHOTO'] = 'VALUE=uri:' . $url;
-
-			} else if ($property->name === 'X-SOCIALPROFILE') {
-				$type = $this->getTypeFromProperty($property);
-
-				// Type is the social network, when it's empty we don't need this.
-				if ($type !== null) {
-					if (!isset($result[$property->name])) {
-						$result[$property->name] = [];
-					}
-					$result[$property->name][$type] = $property->getValue();
-				}
-
-			// The following properties can be set multiple times
-			} else if (in_array($property->name, ['CLOUD', 'EMAIL', 'IMPP', 'TEL', 'URL'])) {
+			} elseif (in_array($property->name, ['URL', 'GEO', 'CLOUD', 'ADR', 'EMAIL', 'IMPP', 'TEL', 'X-SOCIALPROFILE', 'RELATED', 'LANG', 'X-ADDRESSBOOKSERVER-MEMBER'])) {
 				if (!isset($result[$property->name])) {
 					$result[$property->name] = [];
 				}
@@ -279,12 +272,10 @@ class AddressBookImpl implements IAddressBook {
 					$result[$property->name][] = [
 						'type' => $type,
 						'value' => $property->getValue()
-						];
+					];
 				} else {
 					$result[$property->name][] = $property->getValue();
 				}
-
-
 			} else {
 				$result[$property->name] = $property->getValue();
 			}

apps/dav/lib/CardDAV/CardDavBackend.php

@@ -814,7 +814,7 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 
 			$query = "SELECT `uri`, `operation` FROM `*PREFIX*addressbookchanges` WHERE `synctoken` >= ? AND `synctoken` < ? AND `addressbookid` = ? ORDER BY `synctoken`";
 			if ($limit>0) {
-				$query .= " `LIMIT` " . (int)$limit;
+				$query .= " LIMIT " . (int)$limit;
 			}
 
 			// Fetching all changes
@@ -903,9 +903,11 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 	 * @param int $addressBookId
 	 * @param string $pattern which should match within the $searchProperties
 	 * @param array $searchProperties defines the properties within the query pattern should match
+	 * @param array $options = array() to define the search behavior
+	 * 	- 'escape_like_param' - If set to false wildcards _ and % are not escaped, otherwise they are
 	 * @return array an array of contacts which are arrays of key-value-pairs
 	 */
-	public function search($addressBookId, $pattern, $searchProperties) {
+	public function search($addressBookId, $pattern, $searchProperties, $options = array()) {
 		$query = $this->db->getQueryBuilder();
 		$query2 = $this->db->getQueryBuilder();
 
@@ -919,7 +921,11 @@ class CardDavBackend implements BackendInterface, SyncSupport {
 
 		// No need for like when the pattern is empty
 		if ('' !== $pattern) {
-			$query2->andWhere($query2->expr()->ilike('cp.value', $query->createNamedParameter('%' . $this->db->escapeLikeParameter($pattern) . '%')));
+			if(\array_key_exists('escape_like_param', $options) && $options['escape_like_param'] === false) {
+				$query2->andWhere($query2->expr()->ilike('cp.value', $query->createNamedParameter($pattern)));
+			} else {
+				$query2->andWhere($query2->expr()->ilike('cp.value', $query->createNamedParameter('%' . $this->db->escapeLikeParameter($pattern) . '%')));
+			}
 		}
 
 		$query->select('c.carddata', 'c.uri')->from($this->dbCardsTable, 'c')

apps/dav/lib/Command/CreateCalendar.php

@@ -24,6 +24,7 @@
 namespace OCA\DAV\Command;
 
 use OCA\DAV\CalDAV\CalDavBackend;
+use OCA\DAV\CalDAV\Proxy\ProxyMapper;
 use OCA\DAV\Connector\Sabre\Principal;
 use OCP\IDBConnection;
 use OCP\IGroupManager;
@@ -78,8 +79,9 @@ class CreateCalendar extends Command {
 			$this->groupManager,
 			\OC::$server->getShareManager(),
 			\OC::$server->getUserSession(),
-			\OC::$server->getConfig(),
-			\OC::$server->getAppManager()
+			\OC::$server->getAppManager(),
+			\OC::$server->query(ProxyMapper::class),
+			\OC::$server->getConfig()
 		);
 		$random = \OC::$server->getSecureRandom();
 		$logger = \OC::$server->getLogger();

apps/dav/lib/Command/SendEventReminders.php

@@ -0,0 +1,82 @@
+<?php
+/**
+ * @copyright Copyright (c) 2019, Georg Ehrke
+ *
+ * @author Georg Ehrke <oc.list@georgehrke.com>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OCA\DAV\Command;
+
+use OCA\DAV\CalDAV\Reminder\ReminderService;
+use OCP\IConfig;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * Class SendEventReminders
+ *
+ * @package OCA\DAV\Command
+ */
+class SendEventReminders extends Command {
+
+	/** @var ReminderService */
+	protected $reminderService;
+
+	/** @var IConfig */
+	protected $config;
+
+	/**
+	 * @param ReminderService $reminderService
+	 * @param IConfig $config
+	 */
+	public function __construct(ReminderService $reminderService,
+								IConfig $config) {
+		parent::__construct();
+		$this->reminderService = $reminderService;
+		$this->config = $config;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	protected function configure():void {
+		$this
+			->setName('dav:send-event-reminders')
+			->setDescription('Sends event reminders');
+	}
+
+	/**
+	 * @param InputInterface $input
+	 * @param OutputInterface $output
+	 */
+	protected function execute(InputInterface $input, OutputInterface $output):void {
+		if ($this->config->getAppValue('dav', 'sendEventReminders', 'yes') !== 'yes') {
+			$output->writeln('<error>Sending event reminders disabled!</error>');
+			$output->writeln('<info>Please run "php occ config:app:set dav sendEventReminders --value yes"');
+			return;
+		}
+
+		if ($this->config->getAppValue('dav', 'sendEventRemindersMode', 'backgroundjob') !== 'occ') {
+			$output->writeln('<error>Sending event reminders mode set to background-job!</error>');
+			$output->writeln('<info>Please run "php occ config:app:set dav sendEventRemindersMode --value occ"');
+			return;
+		}
+
+		$this->reminderService->processReminders();
+	}
+}

apps/dav/lib/Connector/PublicAuth.php

@@ -34,6 +34,7 @@ use OCP\IRequest;
 use OCP\ISession;
 use OCP\Share\Exceptions\ShareNotFound;
 use OCP\Share\IManager;
+use OCP\Share\IShare;
 use Sabre\DAV\Auth\Backend\AbstractBasic;
 
 /**
@@ -98,9 +99,9 @@ class PublicAuth extends AbstractBasic {
 		// check if the share is password protected
 		if ($share->getPassword() !== null) {
 
-			if ($share->getShareType() === \OCP\Share::SHARE_TYPE_LINK
-				|| $share->getShareType() === \OCP\Share::SHARE_TYPE_EMAIL
-				|| $share->getShareType() === \OCP\Share::SHARE_TYPE_CIRCLE) {
+			if ($share->getShareType() === IShare::TYPE_LINK
+				|| $share->getShareType() === IShare::TYPE_EMAIL
+				|| $share->getShareType() === IShare::TYPE_CIRCLE) {
 				if ($this->shareManager->checkPassword($share, $password)) {
 					return true;
 				} else if ($this->session->exists('public_link_authenticated')
@@ -115,7 +116,7 @@ class PublicAuth extends AbstractBasic {
 					}
 					return false;
 				}
-			} else if ($share->getShareType() === \OCP\Share::SHARE_TYPE_REMOTE) {
+			} else if ($share->getShareType() === IShare::TYPE_REMOTE) {
 				return true;
 			} else {
 				return false;

apps/dav/lib/Connector/Sabre/AnonymousOptionsPlugin.php

@@ -57,7 +57,13 @@ class AnonymousOptionsPlugin extends ServerPlugin {
 	 * @return bool
 	 */
 	public function handleAnonymousOptions(RequestInterface $request, ResponseInterface $response) {
-		if ($request->getHeader('Authorization') === null && $request->getMethod() === 'OPTIONS' && $this->isRequestInRoot($request->getPath())) {
+		$isOffice = preg_match('/Microsoft Office/i', $request->getHeader('User-Agent'));
+		$emptyAuth = $request->getHeader('Authorization') === null
+			|| $request->getHeader('Authorization') === ''
+			|| trim($request->getHeader('Authorization')) === 'Bearer';
+		$isAnonymousOfficeOption = $request->getMethod() === 'OPTIONS' && $isOffice && $emptyAuth;
+		$isOfficeHead = $request->getMethod() === 'HEAD' && $isOffice && $emptyAuth;
+		if ($isAnonymousOfficeOption || $isOfficeHead) {
 			/** @var CorePlugin $corePlugin */
 			$corePlugin = $this->server->getPlugin('core');
 			// setup a fake tree for anonymous access

apps/dav/lib/Connector/Sabre/CustomPropertiesBackend.php

@@ -1,350 +0,0 @@
-<?php
-/**
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- *
- * @author Aaron Wood <aaronjwood@gmail.com>
- * @author Lukas Reschke <lukas@statuscode.ch>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- * @author Vincent Petry <pvince81@owncloud.com>
- *
- * @license AGPL-3.0
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License, version 3,
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *
- */
-
-namespace OCA\DAV\Connector\Sabre;
-
-use OCP\IDBConnection;
-use OCP\IUser;
-use Sabre\DAV\PropertyStorage\Backend\BackendInterface;
-use Sabre\DAV\PropFind;
-use Sabre\DAV\PropPatch;
-use Sabre\DAV\Tree;
-use Sabre\DAV\Exception\NotFound;
-use Sabre\DAV\Exception\ServiceUnavailable;
-
-class CustomPropertiesBackend implements BackendInterface {
-
-	/**
-	 * Ignored properties
-	 *
-	 * @var array
-	 */
-	private $ignoredProperties = array(
-		'{DAV:}getcontentlength',
-		'{DAV:}getcontenttype',
-		'{DAV:}getetag',
-		'{DAV:}quota-used-bytes',
-		'{DAV:}quota-available-bytes',
-		'{http://owncloud.org/ns}permissions',
-		'{http://owncloud.org/ns}downloadURL',
-		'{http://owncloud.org/ns}dDC',
-		'{http://owncloud.org/ns}size',
-		'{http://nextcloud.org/ns}is-encrypted',
-	);
-
-	/**
-	 * @var Tree
-	 */
-	private $tree;
-
-	/**
-	 * @var IDBConnection
-	 */
-	private $connection;
-
-	/**
-	 * @var IUser
-	 */
-	private $user;
-
-	/**
-	 * Properties cache
-	 *
-	 * @var array
-	 */
-	private $cache = [];
-
-	/**
-	 * @param Tree $tree node tree
-	 * @param IDBConnection $connection database connection
-	 * @param IUser $user owner of the tree and properties
-	 */
-	public function __construct(
-		Tree $tree,
-		IDBConnection $connection,
-		IUser $user) {
-		$this->tree = $tree;
-		$this->connection = $connection;
-		$this->user = $user->getUID();
-	}
-
-	/**
-	 * Fetches properties for a path.
-	 *
-	 * @param string $path
-	 * @param PropFind $propFind
-	 * @return void
-	 */
-	public function propFind($path, PropFind $propFind) {
-		try {
-			$node = $this->tree->getNodeForPath($path);
-			if (!($node instanceof Node)) {
-				return;
-			}
-		} catch (ServiceUnavailable $e) {
-			// might happen for unavailable mount points, skip
-			return;
-		} catch (NotFound $e) {
-			// in some rare (buggy) cases the node might not be found,
-			// we catch the exception to prevent breaking the whole list with a 404
-			// (soft fail)
-			\OC::$server->getLogger()->warning(
-				'Could not get node for path: \"' . $path . '\" : ' . $e->getMessage(),
-				array('app' => 'files')
-			);
-			return;
-		}
-
-		$requestedProps = $propFind->get404Properties();
-
-		// these might appear
-		$requestedProps = array_diff(
-			$requestedProps,
-			$this->ignoredProperties
-		);
-
-		if (empty($requestedProps)) {
-			return;
-		}
-
-		$props = $this->getProperties($node, $requestedProps);
-		foreach ($props as $propName => $propValue) {
-			$propFind->set($propName, $propValue);
-		}
-	}
-
-	/**
-	 * Updates properties for a path
-	 *
-	 * @param string $path
-	 * @param PropPatch $propPatch
-	 *
-	 * @return void
-	 */
-	public function propPatch($path, PropPatch $propPatch) {
-		$node = $this->tree->getNodeForPath($path);
-		if (!($node instanceof Node)) {
-			return;
-		}
-
-		$propPatch->handleRemaining(function($changedProps) use ($node) {
-			return $this->updateProperties($node, $changedProps);
-		});
-	}
-
-	/**
-	 * This method is called after a node is deleted.
-	 *
-	 * @param string $path path of node for which to delete properties
-	 */
-	public function delete($path) {
-		$statement = $this->connection->prepare(
-			'DELETE FROM `*PREFIX*properties` WHERE `userid` = ? AND `propertypath` = ?'
-		);
-		$statement->execute(array($this->user, '/' . $path));
-		$statement->closeCursor();
-
-		unset($this->cache[$path]);
-	}
-
-	/**
-	 * This method is called after a successful MOVE
-	 *
-	 * @param string $source
-	 * @param string $destination
-	 *
-	 * @return void
-	 */
-	public function move($source, $destination) {
-		$statement = $this->connection->prepare(
-			'UPDATE `*PREFIX*properties` SET `propertypath` = ?' .
-			' WHERE `userid` = ? AND `propertypath` = ?'
-		);
-		$statement->execute(array('/' . $destination, $this->user, '/' . $source));
-		$statement->closeCursor();
-	}
-
-	/**
-	 * Returns a list of properties for this nodes.;
-	 * @param Node $node
-	 * @param array $requestedProperties requested properties or empty array for "all"
-	 * @return array
-	 * @note The properties list is a list of propertynames the client
-	 * requested, encoded as xmlnamespace#tagName, for example:
-	 * http://www.example.org/namespace#author If the array is empty, all
-	 * properties should be returned
-	 */
-	private function getProperties(Node $node, array $requestedProperties) {
-		$path = $node->getPath();
-		if (isset($this->cache[$path])) {
-			return $this->cache[$path];
-		}
-
-		// TODO: chunking if more than 1000 properties
-		$sql = 'SELECT * FROM `*PREFIX*properties` WHERE `userid` = ? AND `propertypath` = ?';
-
-		$whereValues = array($this->user, $path);
-		$whereTypes = array(null, null);
-
-		if (!empty($requestedProperties)) {
-			// request only a subset
-			$sql .= ' AND `propertyname` in (?)';
-			$whereValues[] = $requestedProperties;
-			$whereTypes[] = \Doctrine\DBAL\Connection::PARAM_STR_ARRAY;
-		}
-
-		$result = $this->connection->executeQuery(
-			$sql,
-			$whereValues,
-			$whereTypes
-		);
-
-		$props = [];
-		while ($row = $result->fetch()) {
-			$props[$row['propertyname']] = $row['propertyvalue'];
-		}
-
-		$result->closeCursor();
-
-		$this->cache[$path] = $props;
-		return $props;
-	}
-
-	/**
-	 * Update properties
-	 *
-	 * @param Node $node node for which to update properties
-	 * @param array $properties array of properties to update
-	 *
-	 * @return bool
-	 */
-	private function updateProperties($node, $properties) {
-		$path = $node->getPath();
-
-		$deleteStatement = 'DELETE FROM `*PREFIX*properties`' .
-			' WHERE `userid` = ? AND `propertypath` = ? AND `propertyname` = ?';
-
-		$insertStatement = 'INSERT INTO `*PREFIX*properties`' .
-			' (`userid`,`propertypath`,`propertyname`,`propertyvalue`) VALUES(?,?,?,?)';
-
-		$updateStatement = 'UPDATE `*PREFIX*properties` SET `propertyvalue` = ?' .
-			' WHERE `userid` = ? AND `propertypath` = ? AND `propertyname` = ?';
-
-		// TODO: use "insert or update" strategy ?
-		$existing = $this->getProperties($node, array());
-		$this->connection->beginTransaction();
-		foreach ($properties as $propertyName => $propertyValue) {
-			// If it was null, we need to delete the property
-			if (is_null($propertyValue)) {
-				if (array_key_exists($propertyName, $existing)) {
-					$this->connection->executeUpdate($deleteStatement,
-						array(
-							$this->user,
-							$path,
-							$propertyName
-						)
-					);
-				}
-			} else {
-				if (!array_key_exists($propertyName, $existing)) {
-					$this->connection->executeUpdate($insertStatement,
-						array(
-							$this->user,
-							$path,
-							$propertyName,
-							$propertyValue
-						)
-					);
-				} else {
-					$this->connection->executeUpdate($updateStatement,
-						array(
-							$propertyValue,
-							$this->user,
-							$path,
-							$propertyName
-						)
-					);
-				}
-			}
-		}
-
-		$this->connection->commit();
-		unset($this->cache[$path]);
-
-		return true;
-	}
-
-	/**
-	 * Bulk load properties for directory children
-	 *
-	 * @param Directory $node
-	 * @param array $requestedProperties requested properties
-	 *
-	 * @return void
-	 */
-	private function loadChildrenProperties(Directory $node, $requestedProperties) {
-		$path = $node->getPath();
-		if (isset($this->cache[$path])) {
-			// we already loaded them at some point
-			return;
-		}
-
-		$childNodes = $node->getChildren();
-		// pre-fill cache
-		foreach ($childNodes as $childNode) {
-			$this->cache[$childNode->getPath()] = [];
-		}
-
-		$sql = 'SELECT * FROM `*PREFIX*properties` WHERE `userid` = ? AND `propertypath` LIKE ?';
-		$sql .= ' AND `propertyname` in (?) ORDER BY `propertypath`, `propertyname`';
-
-		$result = $this->connection->executeQuery(
-			$sql,
-			array($this->user, $this->connection->escapeLikeParameter(rtrim($path, '/')) . '/%', $requestedProperties),
-			array(null, null, \Doctrine\DBAL\Connection::PARAM_STR_ARRAY)
-		);
-
-		$oldPath = null;
-		$props = [];
-		while ($row = $result->fetch()) {
-			$path = $row['propertypath'];
-			if ($oldPath !== $path) {
-				// save previously gathered props
-				$this->cache[$oldPath] = $props;
-				$oldPath = $path;
-				// prepare props for next path
-				$props = [];
-			}
-			$props[$row['propertyname']] = $row['propertyvalue'];
-		}
-		if (!is_null($oldPath)) {
-			// save props from last run
-			$this->cache[$oldPath] = $props;
-		}
-
-		$result->closeCursor();
-	}
-
-}

apps/dav/lib/Connector/Sabre/File.php

@@ -225,7 +225,7 @@ class File extends Node implements IFile {
 			if (isset($_SERVER['CONTENT_LENGTH']) && $_SERVER['REQUEST_METHOD'] === 'PUT') {
 				$expected = (int)$_SERVER['CONTENT_LENGTH'];
 				if ($count !== $expected) {
-					throw new BadRequest('expected filesize ' . $expected . ' got ' . $count);
+					throw new BadRequest('Expected filesize of ' . $expected . ' bytes but read (from Nextcloud client) and wrote (to Nextcloud storage) ' . $count . ' bytes. Could either be a network problem on the sending side or a problem writing to the storage on the server side.');
 				}
 			}
 
@@ -319,7 +319,7 @@ class File extends Node implements IFile {
 			}
 
 		} catch (StorageNotAvailableException $e) {
-			throw new ServiceUnavailable("Failed to check file size: " . $e->getMessage());
+			throw new ServiceUnavailable("Failed to check file size: " . $e->getMessage(), 0, $e);
 		}
 
 		return '"' . $this->info->getEtag() . '"';
@@ -502,8 +502,7 @@ class File extends Node implements IFile {
 				$expected = (int)$_SERVER['CONTENT_LENGTH'];
 				if ($bytesWritten !== $expected) {
 					$chunk_handler->remove($info['index']);
-					throw new BadRequest(
-						'expected filesize ' . $expected . ' got ' . $bytesWritten);
+					throw new BadRequest('Expected filesize of ' . $expected . ' bytes but read (from Nextcloud client) and wrote (to Nextcloud storage) ' . $bytesWritten . ' bytes. Could either be a network problem on the sending side or a problem writing to the storage on the server side.');
 				}
 			}
 		}

apps/dav/lib/Connector/Sabre/Principal.php

@@ -35,6 +35,9 @@
 namespace OCA\DAV\Connector\Sabre;
 
 use OCA\Circles\Exceptions\CircleDoesNotExistException;
+use OCA\DAV\CalDAV\Proxy\Proxy;
+use OCA\DAV\CalDAV\Proxy\ProxyMapper;
+use OCA\DAV\Traits\PrincipalProxyTrait;
 use OCP\App\IAppManager;
 use OCP\AppFramework\QueryException;
 use OCP\IConfig;
@@ -62,9 +65,6 @@ class Principal implements BackendInterface {
 	/** @var IUserSession */
 	private $userSession;
 
-	/** @var IConfig */
-	private $config;
-
 	/** @var IAppManager */
 	private $appManager;
 
@@ -77,12 +77,21 @@ class Principal implements BackendInterface {
 	/** @var bool */
 	private $hasCircles;
 
+	/** @var ProxyMapper */
+	private $proxyMapper;
+
+	/** @var IConfig */
+	private $config;
+
 	/**
+	 * Principal constructor.
+	 *
 	 * @param IUserManager $userManager
 	 * @param IGroupManager $groupManager
 	 * @param IShareManager $shareManager
 	 * @param IUserSession $userSession
 	 * @param IAppManager $appManager
+	 * @param ProxyMapper $proxyMapper
 	 * @param IConfig $config
 	 * @param string $principalPrefix
 	 */
@@ -90,17 +99,23 @@ class Principal implements BackendInterface {
 								IGroupManager $groupManager,
 								IShareManager $shareManager,
 								IUserSession $userSession,
-								IConfig $config,
 								IAppManager $appManager,
-								$principalPrefix = 'principals/users/') {
+								ProxyMapper $proxyMapper,
+								IConfig $config,
+								string $principalPrefix = 'principals/users/') {
 		$this->userManager = $userManager;
 		$this->groupManager = $groupManager;
 		$this->shareManager = $shareManager;
 		$this->userSession = $userSession;
-		$this->config = $config;
 		$this->appManager = $appManager;
 		$this->principalPrefix = trim($principalPrefix, '/');
 		$this->hasGroups = $this->hasCircles = ($principalPrefix === 'principals/users/');
+		$this->proxyMapper = $proxyMapper;
+		$this->config = $config;
+	}
+
+	use PrincipalProxyTrait {
+		getGroupMembership as protected traitGetGroupMembership;
 	}
 
 	/**
@@ -139,6 +154,21 @@ class Principal implements BackendInterface {
 	public function getPrincipalByPath($path) {
 		list($prefix, $name) = \Sabre\Uri\split($path);
 
+		if ($name === 'calendar-proxy-write' || $name === 'calendar-proxy-read') {
+			list($prefix2, $name2) = \Sabre\Uri\split($prefix);
+
+			if ($prefix2 === $this->principalPrefix) {
+				$user = $this->userManager->get($name2);
+
+				if ($user !== null) {
+					return [
+						'uri' => 'principals/users/' . $user->getUID() . '/' . $name,
+					];
+				}
+				return null;
+			}
+		}
+
 		if ($prefix === $this->principalPrefix) {
 			$user = $this->userManager->get($name);
 
@@ -155,23 +185,6 @@ class Principal implements BackendInterface {
 		return null;
 	}
 
-	/**
-	 * Returns the list of members for a group-principal
-	 *
-	 * @param string $principal
-	 * @return string[]
-	 * @throws Exception
-	 */
-	public function getGroupMemberSet($principal) {
-		// TODO: for now the group principal has only one member, the user itself
-		$principal = $this->getPrincipalByPath($principal);
-		if (!$principal) {
-			throw new Exception('Principal not found');
-		}
-
-		return [$principal['uri']];
-	}
-
 	/**
 	 * Returns the list of groups a principal is a member of
 	 *
@@ -183,36 +196,30 @@ class Principal implements BackendInterface {
 	public function getGroupMembership($principal, $needGroups = false) {
 		list($prefix, $name) = \Sabre\Uri\split($principal);
 
-		if ($prefix === $this->principalPrefix) {
-			$user = $this->userManager->get($name);
-			if (!$user) {
-				throw new Exception('Principal not found');
-			}
+		if ($prefix !== $this->principalPrefix) {
+			return [];
+		}
 
-			if ($this->hasGroups || $needGroups) {
-				$groups = $this->groupManager->getUserGroups($user);
-				$groups = array_map(function($group) {
-					/** @var IGroup $group */
-					return 'principals/groups/' . urlencode($group->getGID());
-				}, $groups);
+		$user = $this->userManager->get($name);
+		if (!$user) {
+			throw new Exception('Principal not found');
+		}
 
-				return $groups;
+		$groups = [];
+
+		if ($this->hasGroups || $needGroups) {
+			$userGroups = $this->groupManager->getUserGroups($user);
+			foreach($userGroups as $userGroup) {
+				$groups[] = 'principals/groups/' . urlencode($userGroup->getGID());
 			}
 		}
-		return [];
-	}
 
-	/**
-	 * Updates the list of group members for a group principal.
-	 *
-	 * The principals should be passed as a list of uri's.
-	 *
-	 * @param string $principal
-	 * @param string[] $members
-	 * @throws Exception
-	 */
-	public function setGroupMemberSet($principal, array $members) {
-		throw new Exception('Setting members of the group is not supported yet');
+		$groups = array_unique(array_merge(
+			$groups,
+			$this->traitGetGroupMembership($principal, $needGroups)
+		));
+
+		return $groups;
 	}
 
 	/**
@@ -497,5 +504,4 @@ class Principal implements BackendInterface {
 
 		return [];
 	}
-
 }

apps/dav/lib/Connector/Sabre/ServerFactory.php

@@ -186,7 +186,7 @@ class ServerFactory {
 				// custom properties plugin must be the last one
 				$server->addPlugin(
 					new \Sabre\DAV\PropertyStorage\Plugin(
-						new \OCA\DAV\Connector\Sabre\CustomPropertiesBackend(
+						new \OCA\DAV\DAV\CustomPropertiesBackend(
 							$objectTree,
 							$this->databaseConnection,
 							$this->userSession->getUser()

apps/dav/lib/Connector/Sabre/ShareeList.php

@@ -0,0 +1,61 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\DAV\Connector\Sabre;
+
+use OCP\Share\IShare;
+use Sabre\Xml\Element;
+use Sabre\Xml\Reader;
+use Sabre\Xml\Writer;
+use Sabre\Xml\XmlSerializable;
+
+/**
+ * This property contains multiple "sharee" elements, each containing a share sharee
+ */
+class ShareeList implements XmlSerializable {
+	const NS_NEXTCLOUD = 'http://nextcloud.org/ns';
+
+	/** @var IShare[] */
+	private $shares;
+
+	public function __construct(array $shares) {
+		$this->shares = $shares;
+	}
+
+	/**
+	 * The xmlSerialize metod is called during xml writing.
+	 *
+	 * @param Writer $writer
+	 * @return void
+	 */
+	function xmlSerialize(Writer $writer) {
+		foreach ($this->shares as $share) {
+			$writer->startElement('{' . self::NS_NEXTCLOUD . '}sharee');
+			$writer->writeElement('{' . self::NS_NEXTCLOUD . '}id', $share->getSharedWith());
+			$writer->writeElement('{' . self::NS_NEXTCLOUD . '}display-name', $share->getSharedWithDisplayName());
+			$writer->writeElement('{' . self::NS_NEXTCLOUD . '}type', $share->getShareType());
+			$writer->endElement();
+		}
+	}
+}

apps/dav/lib/Connector/Sabre/SharesPlugin.php

@@ -37,7 +37,9 @@ use OCP\Share\IShare;
 class SharesPlugin extends \Sabre\DAV\ServerPlugin {
 
 	const NS_OWNCLOUD = 'http://owncloud.org/ns';
+	const NS_NEXTCLOUD = 'http://nextcloud.org/ns';
 	const SHARETYPES_PROPERTYNAME = '{http://owncloud.org/ns}share-types';
+	const SHAREES_PROPERTYNAME = '{http://nextcloud.org/ns}sharees';
 
 	/**
 	 * Reference to main server object
@@ -66,10 +68,8 @@ class SharesPlugin extends \Sabre\DAV\ServerPlugin {
 	 */
 	private $userFolder;
 
-	/**
-	 * @var IShare[]
-	 */
-	private $cachedShareTypes;
+	/** @var IShare[] */
+	private $cachedShares = [];
 
 	private $cachedFolders = [];
 
@@ -89,7 +89,6 @@ class SharesPlugin extends \Sabre\DAV\ServerPlugin {
 		$this->shareManager = $shareManager;
 		$this->userFolder = $userFolder;
 		$this->userId = $userSession->getUser()->getUID();
-		$this->cachedShareTypes = [];
 	}
 
 	/**
@@ -106,20 +105,14 @@ class SharesPlugin extends \Sabre\DAV\ServerPlugin {
 		$server->xml->namespacesMap[self::NS_OWNCLOUD] = 'oc';
 		$server->xml->elementMap[self::SHARETYPES_PROPERTYNAME] = ShareTypeList::class;
 		$server->protectedProperties[] = self::SHARETYPES_PROPERTYNAME;
+		$server->protectedProperties[] = self::SHAREES_PROPERTYNAME;
 
 		$this->server = $server;
 		$this->server->on('propFind', array($this, 'handleGetProperties'));
 	}
 
-	/**
-	 * Return a list of share types for outgoing shares
-	 *
-	 * @param \OCP\Files\Node $node file node
-	 *
-	 * @return int[] array of share types
-	 */
-	private function getShareTypes(\OCP\Files\Node $node) {
-		$shareTypes = [];
+	private function getShare(\OCP\Files\Node $node): array {
+		$result = [];
 		$requestedShareTypes = [
 			\OCP\Share::SHARE_TYPE_USER,
 			\OCP\Share::SHARE_TYPE_GROUP,
@@ -130,40 +123,47 @@ class SharesPlugin extends \Sabre\DAV\ServerPlugin {
 			\OCP\Share::SHARE_TYPE_CIRCLE,
 		];
 		foreach ($requestedShareTypes as $requestedShareType) {
-			// one of each type is enough to find out about the types
 			$shares = $this->shareManager->getSharesBy(
 				$this->userId,
 				$requestedShareType,
 				$node,
 				false,
-				1
+				-1
 			);
-			if (!empty($shares)) {
-				$shareTypes[] = $requestedShareType;
+			foreach ($shares as $share) {
+				$result[] = $share;
 			}
 		}
-		return $shareTypes;
+		return $result;
 	}
 
-	private function getSharesTypesInFolder(\OCP\Files\Folder $node) {
-		$shares = $this->shareManager->getSharesInFolder(
+	private function getSharesFolder(\OCP\Files\Folder $node): array {
+		return $this->shareManager->getSharesInFolder(
 			$this->userId,
 			$node,
 			true
 		);
+	}
 
-		$shareTypesByFileId = [];
-
-		foreach($shares as $fileId => $sharesForFile) {
-			$types = array_map(function(IShare $share) {
-				return $share->getShareType();
-			}, $sharesForFile);
-			$types = array_unique($types);
-			sort($types);
-			$shareTypesByFileId[$fileId] = $types;
+	private function getShares(\Sabre\DAV\INode $sabreNode): array {
+		if (isset($this->cachedShares[$sabreNode->getId()])) {
+			$shares = $this->cachedShares[$sabreNode->getId()];
+		} else {
+			list($parentPath,) = \Sabre\Uri\split($sabreNode->getPath());
+			if ($parentPath === '') {
+				$parentPath = '/';
+			}
+			// if we already cached the folder this file is in we know there are no shares for this file
+			if (array_search($parentPath, $this->cachedFolders) === false) {
+				$node = $this->userFolder->get($sabreNode->getPath());
+				$shares = $this->getShare($node);
+				$this->cachedShares[$sabreNode->getId()] = $shares;
+			} else {
+				return [];
+			}
 		}
 
-		return $shareTypesByFileId;
+		return $shares;
 	}
 
 	/**
@@ -183,36 +183,34 @@ class SharesPlugin extends \Sabre\DAV\ServerPlugin {
 		// need prefetch ?
 		if ($sabreNode instanceof \OCA\DAV\Connector\Sabre\Directory
 			&& $propFind->getDepth() !== 0
-			&& !is_null($propFind->getStatus(self::SHARETYPES_PROPERTYNAME))
+			&& (
+				!is_null($propFind->getStatus(self::SHARETYPES_PROPERTYNAME)) ||
+				!is_null($propFind->getStatus(self::SHAREES_PROPERTYNAME))
+			)
 		) {
 			$folderNode = $this->userFolder->get($sabreNode->getPath());
 
-			$childShares = $this->getSharesTypesInFolder($folderNode);
 			$this->cachedFolders[] = $sabreNode->getPath();
-			$this->cachedShareTypes[$folderNode->getId()] = $this->getShareTypes($folderNode);
+			$childShares = $this->getSharesFolder($folderNode);
 			foreach ($childShares as $id => $shares) {
-				$this->cachedShareTypes[$id] = $shares;
+				$this->cachedShares[$id] = $shares;
 			}
 		}
 
 		$propFind->handle(self::SHARETYPES_PROPERTYNAME, function () use ($sabreNode) {
-			if (isset($this->cachedShareTypes[$sabreNode->getId()])) {
-				$shareTypes = $this->cachedShareTypes[$sabreNode->getId()];
-			} else {
-				list($parentPath,) = \Sabre\Uri\split($sabreNode->getPath());
-				if ($parentPath === '') {
-					$parentPath = '/';
-				}
-				// if we already cached the folder this file is in we know there are no shares for this file
-				if (array_search($parentPath, $this->cachedFolders) === false) {
-					$node = $this->userFolder->get($sabreNode->getPath());
-					$shareTypes = $this->getShareTypes($node);
-				} else {
-					return [];
-				}
-			}
+			$shares = $this->getShares($sabreNode);
+
+			$shareTypes = array_unique(array_map(function(IShare $share) {
+				return $share->getShareType();
+			}, $shares));
 
 			return new ShareTypeList($shareTypes);
 		});
+
+		$propFind->handle(self::SHAREES_PROPERTYNAME, function() use ($sabreNode) {
+			$shares = $this->getShares($sabreNode);
+
+			return new ShareeList($shares);
+		});
 	}
 }