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@@ -0,0 +1,86 @@
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+<?php
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+
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+declare(strict_types=1);
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+/**
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+ * @copyright Copyright (c) 2023 Robin Appelman <robin@icewind.nl>
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+ *
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+ * @license GNU AGPL version 3 or any later version
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+ *
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+ * This program is free software: you can redistribute it and/or modify
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+ * it under the terms of the GNU Affero General Public License as
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+ * published by the Free Software Foundation, either version 3 of the
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+ * License, or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU Affero General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Affero General Public License
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+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
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+ *
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+ */
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+
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+namespace OCA\Files_Sharing;
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+
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+use OCP\DB\QueryBuilder\IQueryBuilder;
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+use OCP\Files\IRootFolder;
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+use OCP\IDBConnection;
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+
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+class OrphanHelper {
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+ private IDBConnection $connection;
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+ private IRootFolder $rootFolder;
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+
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+ public function __construct(
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+ IDBConnection $connection,
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+ IRootFolder $rootFolder
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+ ) {
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+ $this->connection = $connection;
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+ $this->rootFolder = $rootFolder;
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+ }
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+
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+ public function isShareValid(string $owner, int $fileId): bool {
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+ $userFolder = $this->rootFolder->getUserFolder($owner);
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+ $nodes = $userFolder->getById($fileId);
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+ return count($nodes) > 0;
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+ }
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+
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+ /**
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+ * @param int[] $ids
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+ * @return void
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+ */
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+ public function deleteShares(array $ids): void {
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+ $query = $this->connection->getQueryBuilder();
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+ $query->delete('share')
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+ ->where($query->expr()->in('id', $query->createNamedParameter($ids, IQueryBuilder::PARAM_INT_ARRAY)));
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+ $query->executeStatement();
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+ }
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+
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+ public function fileExists(int $fileId): bool {
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+ $query = $this->connection->getQueryBuilder();
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+ $query->select('fileid')
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+ ->from('filecache')
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+ ->where($query->expr()->eq('fileid', $query->createNamedParameter($fileId, IQueryBuilder::PARAM_INT)));
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+ return $query->executeQuery()->fetchOne() !== false;
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+ }
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+
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+ /**
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+ * @return \Traversable<int, array{id: int, owner: string, fileid: int, target: string}>
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+ */
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+ public function getAllShares() {
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+ $query = $this->connection->getQueryBuilder();
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+ $query->select('id', 'file_source', 'uid_owner', 'file_target')
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+ ->from('share')
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+ ->where($query->expr()->eq('item_type', $query->createNamedParameter('file')))
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+ ->orWhere($query->expr()->eq('item_type', $query->createNamedParameter('folder')));
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+ $result = $query->executeQuery();
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+ while ($row = $result->fetch()) {
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+ yield [
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+ 'id' => (int)$row['id'],
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+ 'owner' => (string)$row['uid_owner'],
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+ 'fileid' => (int)$row['file_source'],
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+ 'target' => (string)$row['file_target'],
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+ ];
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+ }
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+ }
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+}
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