enh: use datetime

Signed-off-by: Christopher Ng <chrng8@gmail.com>
(cherry picked from commit 163b059c11)

apps/files_reminders/lib/Command/ListCommand.php

@@ -26,7 +26,6 @@ declare(strict_types=1);
 
 namespace OCA\FilesReminders\Command;
 
-use DateTime;
 use DateTimeInterface;
 use OC\Core\Command\Base;
 use OCA\FilesReminders\Model\RichReminder;
@@ -81,7 +80,7 @@ class ListCommand extends Base {
 				fn (RichReminder $reminder) => [
 					$reminder->getUserId(),
 					$reminder->getNode()->getPath(),
-					DateTime::createFromFormat('U', (string)$reminder->getRemindAt())->format(DateTimeInterface::ATOM), // ISO 8601
+					$reminder->getRemindAt()->format(DateTimeInterface::ATOM), // ISO 8601
 					$reminder->getNotified() ? 'true' : 'false',
 				],
 				$reminders,

apps/files_reminders/lib/Db/Reminder.php

@@ -26,6 +26,7 @@ declare(strict_types=1);
 
 namespace OCA\FilesReminders\Db;
 
+use DateTime;
 use OCP\AppFramework\Db\Entity;
 
 /**
@@ -35,8 +36,8 @@ use OCP\AppFramework\Db\Entity;
  * @method void setFileId(int $fileId)
  * @method int getFileId()
  *
- * @method void setRemindAt(int $remindAt)
- * @method int getRemindAt()
+ * @method void setRemindAt(DateTime $remindAt)
+ * @method DateTime getRemindAt()
  *
  * @method void setNotified(bool $notified)
  * @method bool getNotified()
@@ -50,7 +51,7 @@ class Reminder extends Entity {
 	public function __construct() {
 		$this->addType('userId', 'string');
 		$this->addType('fileId', 'integer');
-		$this->addType('remindAt', 'integer');
+		$this->addType('remindAt', 'datetime');
 		$this->addType('notified', 'boolean');
 	}
 }

apps/files_reminders/lib/Migration/Version10000Date20230725162149.php

@@ -55,9 +55,10 @@ class Version10000Date20230725162149 extends SimpleMigrationStep {
 		$table->addColumn('file_id', Types::BIGINT, [
 			'notnull' => true,
 			'length' => 20,
+			'unsigned' => true,
 		]);
-		$table->addColumn('remind_at', Types::BIGINT, [
-			'notnull' => true,
+		$table->addColumn('remind_at', Types::DATETIME, [
+			'notnull' => false,
 		]);
 		$table->addColumn('notified', Types::BOOLEAN, [
 			'notnull' => false,

apps/files_reminders/lib/Service/ReminderService.php

@@ -90,7 +90,7 @@ class ReminderService {
 			->setUser($user->getUID())
 			->setObject('reminder', (string)$reminder->getId())
 			->setSubject('reminder-due')
-			->setDateTime(DateTime::createFromFormat('U', (string)$reminder->getRemindAt()));
+			->setDateTime($reminder->getRemindAt());
 
 		try {
 			$this->notificationManager->notify($notification);