DAV custom props: catch Exception and rollback transaction in case

- before exceptions were not caught, a started transaction might not have
  been finished
- also resolve depractions and use IQueryBuilder

Signed-off-by: Arthur Schiwon <[email protected]>

apps/dav/lib/DAV/CustomPropertiesBackend.php

@@ -24,7 +24,8 @@
  */
 namespace OCA\DAV\DAV;
 
-use OCA\DAV\Connector\Sabre\Node;
+use OCP\DB\Exception;
+use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IDBConnection;
 use OCP\IUser;
 use Sabre\DAV\PropertyStorage\Backend\BackendInterface;
@@ -308,66 +309,54 @@ private function getUserProperties(string $path, array $requestedProperties) {
 	}
 
 	/**
-	 * Update properties
-	 *
-	 * @param string $path path for which to update properties
-	 * @param array $properties array of properties to update
-	 *
-	 * @return bool
+	 * @throws Exception
 	 */
-	private function updateProperties(string $path, array $properties) {
-		$deleteStatement = 'DELETE FROM `*PREFIX*properties`' .
-			' WHERE `userid` = ? AND `propertypath` = ? AND `propertyname` = ?';
-
-		$insertStatement = 'INSERT INTO `*PREFIX*properties`' .
-			' (`userid`,`propertypath`,`propertyname`,`propertyvalue`, `valuetype`) VALUES(?,?,?,?,?)';
-
-		$updateStatement = 'UPDATE `*PREFIX*properties` SET `propertyvalue` = ?, `valuetype` = ?' .
-			' WHERE `userid` = ? AND `propertypath` = ? AND `propertyname` = ?';
-
+	private function updateProperties(string $path, array $properties): bool {
 		// TODO: use "insert or update" strategy ?
 		$existing = $this->getUserProperties($path, []);
-		$this->connection->beginTransaction();
-		foreach ($properties as $propertyName => $propertyValue) {
-			// If it was null, we need to delete the property
-			if (is_null($propertyValue)) {
-				if (array_key_exists($propertyName, $existing)) {
-					$this->connection->executeUpdate($deleteStatement,
-						[
-							$this->user->getUID(),
-							$this->formatPath($path),
-							$propertyName,
-						]
-					);
-				}
-			} else {
-				[$value, $valueType] = $this->encodeValueForDatabase($propertyValue);
-				if (!array_key_exists($propertyName, $existing)) {
-					$this->connection->executeUpdate($insertStatement,
-						[
-							$this->user->getUID(),
-							$this->formatPath($path),
-							$propertyName,
-							$value,
-							$valueType
-						]
-					);
+		try {
+			$this->connection->beginTransaction();
+			foreach ($properties as $propertyName => $propertyValue) {
+				// common parameters for all queries
+				$dbParameters = [
+					'userid' => $this->user->getUID(),
+					'propertyPath' => $this->formatPath($path),
+					'propertyName' => $propertyName
+				];
+
+				// If it was null, we need to delete the property
+				if (is_null($propertyValue)) {
+					if (array_key_exists($propertyName, $existing)) {
+						$deleteQuery = $deleteQuery ?? $this->createDeleteQuery();
+						$deleteQuery
+							->setParameters($dbParameters)
+							->executeStatement();
+					}
 				} else {
-					$this->connection->executeUpdate($updateStatement,
-						[
-							$value,
-							$valueType,
-							$this->user->getUID(),
-							$this->formatPath($path),
-							$propertyName,
-						]
-					);
+					[$value, $valueType] = $this->encodeValueForDatabase($propertyValue);
+					$dbParameters['propertyValue'] = $value;
+					$dbParameters['valueType'] = $valueType;
+
+					if (!array_key_exists($propertyName, $existing)) {
+						$insertQuery = $insertQuery ?? $this->createInsertQuery();
+						$insertQuery
+							->setParameters($dbParameters)
+							->executeStatement();
+					} else {
+						$updateQuery = $updateQuery ?? $this->createUpdateQuery();
+						$updateQuery
+							->setParameters($dbParameters)
+							->executeStatement();
+					}
 				}
 			}
-		}
 
-		$this->connection->commit();
-		unset($this->userCache[$path]);
+			$this->connection->commit();
+			unset($this->userCache[$path]);
+		} catch (Exception $e) {
+			$this->connection->rollBack();
+			throw $e;
+		}
 
 		return true;
 	}
@@ -417,4 +406,37 @@ private function decodeValueFromDatabase(string $value, int $valueType) {
 				return $value;
 		}
 	}
+
+	private function createDeleteQuery(): IQueryBuilder {
+		$deleteQuery = $this->connection->getQueryBuilder();
+		$deleteQuery->delete('properties')
+			->where($deleteQuery->expr()->eq('userid', $deleteQuery->createParameter('userid')))
+			->andWhere($deleteQuery->expr()->eq('propertypath', $deleteQuery->createParameter('propertyPath')))
+			->andWhere($deleteQuery->expr()->eq('propertyname', $deleteQuery->createParameter('propertyName')));
+		return $deleteQuery;
+	}
+
+	private function createInsertQuery(): IQueryBuilder {
+		$insertQuery = $this->connection->getQueryBuilder();
+		$insertQuery->insert('properties')
+			->values([
+				'userid' => $insertQuery->createParameter('userid'),
+				'propertypath' => $insertQuery->createParameter('propertyPath'),
+				'propertyname' => $insertQuery->createParameter('propertyName'),
+				'propertyvalue' => $insertQuery->createParameter('propertyValue'),
+				'valuetype' => $insertQuery->createParameter('valueType'),
+			]);
+		return $insertQuery;
+	}
+
+	private function createUpdateQuery(): IQueryBuilder {
+		$updateQuery = $this->connection->getQueryBuilder();
+		$updateQuery->update('properties')
+			->set('propertyvalue', $updateQuery->createParameter('propertyValue'))
+			->set('valuetype', $updateQuery->createParameter('valueType'))
+			->where($updateQuery->expr()->eq('userid', $updateQuery->createParameter('userid')))
+			->andWhere($updateQuery->expr()->eq('propertypath', $updateQuery->createParameter('propertyPath')))
+			->andWhere($updateQuery->expr()->eq('propertyname', $updateQuery->createParameter('propertyName')));
+		return $updateQuery;
+	}
 }