1 files changed, 25 insertions, 0 deletions
diff --git a/lib/public/Preview/IVersionedPreviewFile.php b/lib/public/Preview/IVersionedPreviewFile.php
new file mode 100644
index 00000000000..9266b1ac067
--- /dev/null
+++ b/lib/public/Preview/IVersionedPreviewFile.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCP\Preview;
+
+/**
+ * Marks files that should keep multiple preview "versions" for the same file id
+ *
+ * Examples of this are files where the storage backend provides versioning, for those
+ * files, we dont have fileids for the different versions but still need to be able to generate
+ * previews for all versions
+ *
+ * @since 17.0.0
+ */
+interface IVersionedPreviewFile {
+	/**
+	 * @return string
+	 * @since 17.0.0
+	 */
+	public function getPreviewVersion(): string;
+}