enh(TextToImage): Allow anonymous access to IManager#getUserTasksByApp

Signed-off-by: Marcel Klehr <mklehr@gmx.net>

lib/private/TextToImage/Db/TaskMapper.php

@@ -89,7 +89,7 @@ class TaskMapper extends QBMapper {
 	 * @return array
 	 * @throws Exception
 	 */
-	public function findUserTasksByApp(string $userId, string $appId, ?string $identifier = null): array {
+	public function findUserTasksByApp(?string $userId, string $appId, ?string $identifier = null): array {
 		$qb = $this->db->getQueryBuilder();
 		$qb->select(Task::$columns)
 			->from($this->tableName)

lib/private/TextToImage/Manager.php

@@ -267,7 +267,7 @@ class Manager implements IManager {
 	 * @param string|null $identifier
 	 * @return Task[]
 	 */
-	public function getUserTasksByApp(string $userId, string $appId, ?string $identifier = null): array {
+	public function getUserTasksByApp(?string $userId, string $appId, ?string $identifier = null): array {
 		try {
 			$taskEntities = $this->taskMapper->findUserTasksByApp($userId, $appId, $identifier);
 			return array_map(static function (DbTask $taskEntity) {

lib/public/TextToImage/IManager.php

@@ -88,11 +88,11 @@ interface IManager {
 	public function getUserTask(int $id, ?string $userId): Task;
 
 	/**
-	 * @param string $userId
+	 * @param ?string $userId
 	 * @param string $appId
 	 * @param string|null $identifier
 	 * @return Task[]
 	 * @since 28.0.0
 	 */
-	public function getUserTasksByApp(string $userId, string $appId, ?string $identifier = null): array;
+	public function getUserTasksByApp(?string $userId, string $appId, ?string $identifier = null): array;
 }