1 files changed, 105 insertions, 0 deletions
diff --git a/lib/private/Metadata/FileMetadataMapper.php b/lib/private/Metadata/FileMetadataMapper.php
new file mode 100644
index 00000000000..53f750ae540
--- /dev/null
+++ b/lib/private/Metadata/FileMetadataMapper.php
@@ -0,0 +1,105 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright 2022 Carl Schwan <carl@carlschwan.eu>
+ * @license AGPL-3.0-or-later
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OC\Metadata;
+
+use OCP\AppFramework\Db\DoesNotExistException;
+use OCP\AppFramework\Db\MultipleObjectsReturnedException;
+use OCP\AppFramework\Db\QBMapper;
+use OCP\DB\Exception;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
+
+class FileMetadataMapper extends QBMapper {
+	public function __construct(IDBConnection $db) {
+		parent::__construct($db, 'file_metadata', FileMetadata::class);
+	}
+
+	/**
+	 * @return FileMetadata[]
+	 * @throws Exception
+	 */
+	public function findForFile(int $fileId): array {
+		$qb = $this->db->getQueryBuilder();
+		$qb->select('*')
+			->from($this->getTableName())
+			->where($qb->expr()->eq('id', $qb->createNamedParameter($fileId, IQueryBuilder::PARAM_INT)));
+
+		return $this->findEntities($qb);
+	}
+
+	/**
+	 * @throws DoesNotExistException
+	 * @throws MultipleObjectsReturnedException
+	 * @throws Exception
+	 */
+	public function findForGroupForFile(int $fileId, string $groupName): FileMetadata {
+		$qb = $this->db->getQueryBuilder();
+		$qb->select('*')
+			->from($this->getTableName())
+			->where($qb->expr()->eq('id', $qb->createNamedParameter($fileId, IQueryBuilder::PARAM_INT_ARRAY)))
+			->andWhere($qb->expr()->eq('group_name', $qb->createNamedParameter($groupName, IQueryBuilder::PARAM_STR)));
+
+		return $this->findEntity($qb);
+	}
+
+	/**
+	 * @return array<int, FileMetadata>
+	 * @throws Exception
+	 */
+	public function findForGroupForFiles(array $fileIds, string $groupName): array {
+		$qb = $this->db->getQueryBuilder();
+		$qb->select('*')
+			->from($this->getTableName())
+			->where($qb->expr()->in('id', $qb->createParameter('fileIds')))
+			->andWhere($qb->expr()->eq('group_name', $qb->createNamedParameter($groupName, IQueryBuilder::PARAM_STR)));
+
+		$metadata = [];
+		foreach (array_chunk($fileIds, 1000) as $fileIdsChunk) {
+			$qb->setParameter('fileIds', $fileIdsChunk, IQueryBuilder::PARAM_INT_ARRAY);
+			/** @var FileMetadata[] $rawEntities */
+			$rawEntities = $this->findEntities($qb);
+			foreach ($rawEntities as $entity) {
+				$metadata[$entity->getId()] = $entity;
+			}
+		}
+
+		foreach ($fileIds as $id) {
+			if (isset($metadata[$id])) {
+				continue;
+			}
+			$empty = new FileMetadata();
+			$empty->setMetadata([]);
+			$empty->setGroupName($groupName);
+			$empty->setId($id);
+			$metadata[$id] = $empty;
+		}
+		return $metadata;
+	}
+
+	public function clear(int $fileId): void {
+		$qb = $this->db->getQueryBuilder();
+		$qb->delete($this->getTableName())
+			->where($qb->expr()->eq('id', $qb->createNamedParameter($fileId, IQueryBuilder::PARAM_INT)));
+
+		$qb->executeStatement();
+	}
+}