Distribute preview folders in appdata in multibucket setup to multiple buckets

* introduces a new IRootMountProvider to register mount points inside the root storage
* adds a AppdataPreviewObjectStoreStorage to handle the split between preview folders and bucket number

Ref #22033

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

1 files changed, 44 insertions, 0 deletions

diff --git a/lib/private/Files/ObjectStore/AppdataPreviewObjectStoreStorage.php b/lib/private/Files/ObjectStore/AppdataPreviewObjectStoreStorage.php
new file mode 100644
index 00000000000..ab6cb07cdc3
--- /dev/null
+++ b/lib/private/Files/ObjectStore/AppdataPreviewObjectStoreStorage.php
@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2020, Morris Jobke <hey@morrisjobke.de>
+ *
+ * @author Morris Jobke <hey@morrisjobke.de>
+ *
+ * @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 OC\Files\ObjectStore;
+
+class AppdataPreviewObjectStoreStorage extends ObjectStoreStorage {
+
+	/** @var string */
+	private $internalId;
+
+	public function __construct($params) {
+		if (!isset($params['internal-id'])) {
+			throw new \Exception('missing id in parameters');
+		}
+		$this->internalId = (string)$params['internal-id'];
+		parent::__construct($params);
+	}
+
+	public function getId() {
+		return 'object::appdata::preview:' . $this->internalId;
+	}
+}