fix trashbin previews for modular api

Signed-off-by: Robin Appelman <robin@icewind.nl>

apps/files_trashbin/lib/Controller/PreviewController.php

@@ -22,27 +22,34 @@ declare(strict_types=1);
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+
 namespace OCA\Files_Trashbin\Controller;
 
+use OCA\Files_Trashbin\Trash\ITrashManager;
 use OCP\AppFramework\Controller;
 use OCP\AppFramework\Http;
 use OCP\AppFramework\Http\DataResponse;
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\Files\File;
+use OCP\Files\FileInfo;
 use OCP\Files\Folder;
 use OCP\Files\IMimeTypeDetector;
 use OCP\Files\IRootFolder;
 use OCP\Files\NotFoundException;
 use OCP\IPreview;
 use OCP\IRequest;
+use OCP\IUser;
+use OCP\IUserSession;
 
 class PreviewController extends Controller {
-
 	/** @var IRootFolder */
 	private $rootFolder;
 
-	/** @var string */
-	private $userId;
+	/** @var ITrashManager */
+	private $trashManager;
+
+	/** @var IUserSession */
+	private $userSession;
 
 	/** @var IMimeTypeDetector */
 	private $mimeTypeDetector;
@@ -53,17 +60,21 @@ class PreviewController extends Controller {
 	/** @var ITimeFactory */
 	private $time;
 
-	public function __construct(string $appName,
+	public function __construct(
+		string $appName,
 		IRequest $request,
 		IRootFolder $rootFolder,
-								string $userId,
+		ITrashManager $trashManager,
+		IUserSession $userSession,
 		IMimeTypeDetector $mimeTypeDetector,
 		IPreview $previewManager,
-								ITimeFactory $time) {
+		ITimeFactory $time
+	) {
 		parent::__construct($appName, $request);
 
+		$this->trashManager = $trashManager;
 		$this->rootFolder = $rootFolder;
-		$this->userId = $userId;
+		$this->userSession = $userSession;
 		$this->mimeTypeDetector = $mimeTypeDetector;
 		$this->previewManager = $previewManager;
 		$this->time = $time;
@@ -86,39 +97,25 @@ class PreviewController extends Controller {
 		}
 
 		try {
-			$userFolder = $this->rootFolder->getUserFolder($this->userId);
-			/** @var Folder $trash */
-			$trash = $userFolder->getParent()->get('files_trashbin/files');
-			$trashFiles = $trash->getById($fileId);
-
-			if (empty($trashFiles)) {
-				throw new NotFoundException();
-			}
-
-			$trashFile = array_pop($trashFiles);
-
-			if ($trashFile instanceof Folder) {
-				return new DataResponse([], Http::STATUS_BAD_REQUEST);
+			$file = $this->trashManager->getTrashNodeById($this->userSession->getUser(), $fileId);
+			if ($file === null || $file instanceof Folder) {
+				return new DataResponse([], Http::STATUS_NOT_FOUND);
 			}
 
+			$pathParts = pathinfo($file->getName());
+			$extension = $pathParts['extension'];
+			$fileName = $pathParts['filename'];
 			/*
 			 * Files in the root of the trashbin are timetamped.
 			 * So we have to strip that in order to properly detect the mimetype of the file.
 			 */
-			if ($trashFile->getParent()->getPath() === $trash->getPath()) {
-				/** @var File $trashFile */
-				$fileName = $trashFile->getName();
-				$i = strrpos($fileName, '.');
-				if ($i !== false) {
-					$fileName = substr($fileName, 0, $i);
-				}
-
+			if (preg_match('/d\d+/', $extension)) {
 				$mimeType = $this->mimeTypeDetector->detectPath($fileName);
 			} else {
-				$mimeType = $this->mimeTypeDetector->detectPath($trashFile->getName());
+				$mimeType = $this->mimeTypeDetector->detectPath($file->getName());
 			}
 
-			$f = $this->previewManager->getPreview($trashFile, $x, $y, true, IPreview::MODE_FILL, $mimeType);
+			$f = $this->previewManager->getPreview($file, $x, $y, true, IPreview::MODE_FILL, $mimeType);
 			$response = new Http\FileDisplayResponse($f, Http::STATUS_OK, ['Content-Type' => $f->getMimeType()]);
 
 			// Cache previews for 24H

apps/files_trashbin/lib/Trash/ITrashBackend.php

@@ -22,6 +22,8 @@
 namespace OCA\Files_Trashbin\Trash;
 
 use OCP\Files\FileInfo;
+use OCP\Files\Node;
+use OCP\Files\SimpleFS\ISimpleFile;
 use OCP\Files\Storage\IStorage;
 use OCP\IUser;
 
@@ -61,7 +63,6 @@ interface ITrashBackend {
 	 *
 	 * @param IUser $user
 	 * @param ITrashItem $item
-	 * @return
 	 * @since 15.0.0
 	 */
 	public function removeItem(IUser $user, ITrashItem $item);
@@ -74,5 +75,12 @@ interface ITrashBackend {
 	 * @return boolean whether or not the file was moved to trash, if false then the file should be deleted normally
 	 * @since 15.0.0
 	 */
-	public function moveToTrash(IStorage $storage, string $internalPath);
+	public function moveToTrash(IStorage $storage, string $internalPath): bool;
+
+	/**
+	 * @param IUser $user
+	 * @param int $fileId
+	 * @return Node|null
+	 */
+	public function getTrashNodeById(IUser $user, int $fileId);
 }

apps/files_trashbin/lib/Trash/LegacyTrashBackend.php

@@ -27,6 +27,8 @@ use OCA\Files_Trashbin\Helper;
 use OCA\Files_Trashbin\Storage;
 use OCA\Files_Trashbin\Trashbin;
 use OCP\Files\FileInfo;
+use OCP\Files\IRootFolder;
+use OCP\Files\NotFoundException;
 use OCP\Files\Storage\IStorage;
 use OCP\IUser;
 
@@ -34,6 +36,13 @@ class LegacyTrashBackend implements ITrashBackend {
 	/** @var array */
 	private $deletedFiles = [];
 
+	/** @var IRootFolder */
+	private $rootFolder;
+
+	public function __construct(IRootFolder $rootFolder) {
+		$this->rootFolder = $rootFolder;
+	}
+
 	/**
 	 * @param array $items
 	 * @param IUser $user
@@ -78,7 +87,7 @@ class LegacyTrashBackend implements ITrashBackend {
 
 	}
 
-	public function moveToTrash(IStorage $storage, string $internalPath) {
+	public function moveToTrash(IStorage $storage, string $internalPath): bool {
 		if (!$storage instanceof Storage) {
 			return false;
 		}
@@ -99,4 +108,18 @@ class LegacyTrashBackend implements ITrashBackend {
 
 		return $result;
 	}
+
+	public function getTrashNodeById(IUser $user, int $fileId) {
+		try {
+			$userFolder = $this->rootFolder->getUserFolder($user->getUID());
+			$trash = $userFolder->getParent()->get('files_trashbin/files');
+			$trashFiles = $trash->getById($fileId);
+			if (!$trashFiles) {
+				return null;
+			}
+			return $trashFiles ? array_pop($trashFiles) : null;
+		} catch (NotFoundException $e) {
+			return null;
+		}
+	}
 }

apps/files_trashbin/lib/Trash/TrashManager.php

@@ -76,9 +76,9 @@ class TrashManager implements ITrashManager {
 	 */
 	public function getBackendForStorage(IStorage $storage): ITrashBackend {
 		$fullType = get_class($storage);
-		$foundType = array_reduce(array_keys($this->backends), function ($type, $registeredType) use ($fullType) {
+		$foundType = array_reduce(array_keys($this->backends), function ($type, $registeredType) use ($storage) {
 			if (
-				is_subclass_of($fullType, $registeredType) &&
+				$storage->instanceOfStorage($registeredType) &&
 				($type === '' || is_subclass_of($registeredType, $type))
 			) {
 				return $registeredType;
@@ -93,7 +93,7 @@ class TrashManager implements ITrashManager {
 		}
 	}
 
-	public function moveToTrash(IStorage $storage, string $internalPath) {
+	public function moveToTrash(IStorage $storage, string $internalPath): bool {
 		if ($this->trashPaused) {
 			return false;
 		}
@@ -105,6 +105,16 @@ class TrashManager implements ITrashManager {
 		}
 	}
 
+	public function getTrashNodeById(IUser $user, int $fileId) {
+		foreach ($this->backends as $backend) {
+			$item = $backend->getTrashNodeById($user, $fileId);
+			if ($item !== null) {
+				return $item;
+			}
+		}
+		return null;
+	}
+
 	public function pauseTrash() {
 		$this->trashPaused = true;
 	}