dbConnection->getQueryBuilder(); $qb->insert(self::TABLE_METADATA) ->setValue('file_id', $qb->createNamedParameter($filesMetadata->getFileId(), IQueryBuilder::PARAM_INT)) ->setValue('json', $qb->createNamedParameter(json_encode($filesMetadata->jsonSerialize()))) ->setValue('sync_token', $qb->createNamedParameter($this->generateSyncToken())) ->setValue('last_update', (string)$qb->createFunction('NOW()')); $qb->executeStatement(); } /** * returns metadata for a file id * * @param int $fileId file id * * @return IFilesMetadata * @throws FilesMetadataNotFoundException if no metadata are found in database */ public function getMetadataFromFileId(int $fileId): IFilesMetadata { try { $qb = $this->dbConnection->getQueryBuilder(); $qb->select('json', 'sync_token')->from(self::TABLE_METADATA); $qb->where($qb->expr()->eq('file_id', $qb->createNamedParameter($fileId, IQueryBuilder::PARAM_INT))); $result = $qb->executeQuery(); $data = $result->fetch(); $result->closeCursor(); } catch (Exception $e) { $this->logger->warning('exception while getMetadataFromDatabase()', ['exception' => $e, 'fileId' => $fileId]); throw new FilesMetadataNotFoundException(); } if ($data === false) { throw new FilesMetadataNotFoundException(); } $metadata = new FilesMetadata($fileId); $metadata->importFromDatabase($data); return $metadata; } /** * returns metadata for multiple file ids * * @param array $fileIds file ids * * @return array File ID is the array key, files without metadata are not returned in the array * @psalm-return array */ public function getMetadataFromFileIds(array $fileIds): array { $qb = $this->dbConnection->getQueryBuilder(); $qb->select('file_id', 'json', 'sync_token')->from(self::TABLE_METADATA); $qb->where($qb->expr()->in('file_id', $qb->createNamedParameter($fileIds, IQueryBuilder::PARAM_INT_ARRAY))); $list = []; $result = $qb->executeQuery(); while ($data = $result->fetch()) { $fileId = (int)$data['file_id']; $metadata = new FilesMetadata($fileId); try { $metadata->importFromDatabase($data); } catch (FilesMetadataNotFoundException) { continue; } $list[$fileId] = $metadata; } $result->closeCursor(); return $list; } /** * drop metadata related to a file id * * @param int $fileId file id * * @return void * @throws Exception */ public function dropMetadata(int $fileId): void { $qb = $this->dbConnection->getQueryBuilder(); $qb->delete(self::TABLE_METADATA) ->where($qb->expr()->eq('file_id', $qb->createNamedParameter($fileId, IQueryBuilder::PARAM_INT))); $qb->executeStatement(); } /** * update metadata in the database * * @param IFilesMetadata $filesMetadata metadata * * @return int number of affected rows * @throws Exception */ public function updateMetadata(IFilesMetadata $filesMetadata): int { $qb = $this->dbConnection->getQueryBuilder(); $expr = $qb->expr(); $qb->update(self::TABLE_METADATA) ->set('json', $qb->createNamedParameter(json_encode($filesMetadata->jsonSerialize()))) ->set('sync_token', $qb->createNamedParameter($this->generateSyncToken())) ->set('last_update', $qb->createFunction('NOW()')) ->where( $expr->andX( $expr->eq('file_id', $qb->createNamedParameter($filesMetadata->getFileId(), IQueryBuilder::PARAM_INT)), $expr->eq('sync_token', $qb->createNamedParameter($filesMetadata->getSyncToken())) ) ); return $qb->executeStatement(); } /** * generate a random token * @return string */ private function generateSyncToken(): string { $chars = 'qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890'; $str = ''; $max = strlen($chars); for ($i = 0; $i < 7; $i++) { try { $str .= $chars[random_int(0, $max - 2)]; } catch (\Exception $e) { $this->logger->warning('exception during generateSyncToken', ['exception' => $e]); } } return $str; } } tonge/feat/add_retry_support_to_query_builder Nextcloud server, a safe home for all your data: https://github.com/nextcloud/serverwww-data
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