nextcloud / server

core/Migrations/Version14000Date20180404140050.php

Indentation +40 added lines, -40 removed lines

@@ -37,53 +37,53 @@
  */
 class Version14000Date20180404140050 extends SimpleMigrationStep {
 
-	/** @var IDBConnection */
-	private $connection;
+    /** @var IDBConnection */
+    private $connection;
 
-	public function __construct(IDBConnection $connection) {
-		$this->connection = $connection;
-	}
+    public function __construct(IDBConnection $connection) {
+        $this->connection = $connection;
+    }
 
-	public function name(): string {
-		return 'Add lowercase user id column to users table';
-	}
+    public function name(): string {
+        return 'Add lowercase user id column to users table';
+    }
 
-	public function description(): string {
-		return 'Adds "uid_lower" column to the users table and fills the column to allow indexed case-insensitive searches';
-	}
+    public function description(): string {
+        return 'Adds "uid_lower" column to the users table and fills the column to allow indexed case-insensitive searches';
+    }
 
-	/**
-	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
-	 * @param array $options
-	 * @return null|ISchemaWrapper
-	 */
-	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
-		/** @var ISchemaWrapper $schema */
-		$schema = $schemaClosure();
+    /**
+     * @param IOutput $output
+     * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+     * @param array $options
+     * @return null|ISchemaWrapper
+     */
+    public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
+        /** @var ISchemaWrapper $schema */
+        $schema = $schemaClosure();
 
-		$table = $schema->getTable('users');
+        $table = $schema->getTable('users');
 
-		$table->addColumn('uid_lower', 'string', [
-			'notnull' => false,
-			'length' => 64,
-			'default' => '',
-		]);
-		$table->addIndex(['uid_lower'], 'user_uid_lower');
+        $table->addColumn('uid_lower', 'string', [
+            'notnull' => false,
+            'length' => 64,
+            'default' => '',
+        ]);
+        $table->addIndex(['uid_lower'], 'user_uid_lower');
 
-		return $schema;
-	}
+        return $schema;
+    }
 
-	/**
-	 * @param IOutput $output
-	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
-	 * @param array $options
-	 */
-	public function postSchemaChange(IOutput $output, \Closure $schemaClosure, array $options) {
-		$qb = $this->connection->getQueryBuilder();
+    /**
+     * @param IOutput $output
+     * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+     * @param array $options
+     */
+    public function postSchemaChange(IOutput $output, \Closure $schemaClosure, array $options) {
+        $qb = $this->connection->getQueryBuilder();
 
-		$qb->update('users')
-			->set('uid_lower', $qb->func()->lower('uid'));
-		$qb->execute();
-	}
+        $qb->update('users')
+            ->set('uid_lower', $qb->func()->lower('uid'));
+        $qb->execute();
+    }
 }

core/Command/Db/ConvertType.php

Indentation +410 added lines, -410 removed lines

@@ -54,414 +54,414 @@
 use Symfony\Component\Console\Question\Question;
 
 class ConvertType extends Command implements CompletionAwareInterface {
-	/**
-	 * @var \OCP\IConfig
-	 */
-	protected $config;
-
-	/**
-	 * @var \OC\DB\ConnectionFactory
-	 */
-	protected $connectionFactory;
-
-	/** @var array */
-	protected $columnTypes;
-
-	/**
-	 * @param \OCP\IConfig $config
-	 * @param \OC\DB\ConnectionFactory $connectionFactory
-	 */
-	public function __construct(IConfig $config, ConnectionFactory $connectionFactory) {
-		$this->config = $config;
-		$this->connectionFactory = $connectionFactory;
-		parent::__construct();
-	}
-
-	protected function configure() {
-		$this
-			->setName('db:convert-type')
-			->setDescription('Convert the Nextcloud database to the newly configured one')
-			->addArgument(
-				'type',
-				InputArgument::REQUIRED,
-				'the type of the database to convert to'
-			)
-			->addArgument(
-				'username',
-				InputArgument::REQUIRED,
-				'the username of the database to convert to'
-			)
-			->addArgument(
-				'hostname',
-				InputArgument::REQUIRED,
-				'the hostname of the database to convert to'
-			)
-			->addArgument(
-				'database',
-				InputArgument::REQUIRED,
-				'the name of the database to convert to'
-			)
-			->addOption(
-				'port',
-				null,
-				InputOption::VALUE_REQUIRED,
-				'the port of the database to convert to'
-			)
-			->addOption(
-				'password',
-				null,
-				InputOption::VALUE_REQUIRED,
-				'the password of the database to convert to. Will be asked when not specified. Can also be passed via stdin.'
-			)
-			->addOption(
-				'clear-schema',
-				null,
-				InputOption::VALUE_NONE,
-				'remove all tables from the destination database'
-			)
-			->addOption(
-				'all-apps',
-				null,
-				InputOption::VALUE_NONE,
-				'whether to create schema for all apps instead of only installed apps'
-			)
-			->addOption(
-				'chunk-size',
-				null,
-				InputOption::VALUE_REQUIRED,
-				'the maximum number of database rows to handle in a single query, bigger tables will be handled in chunks of this size. Lower this if the process runs out of memory during conversion.',
-				1000
-			)
-		;
-	}
-
-	protected function validateInput(InputInterface $input, OutputInterface $output) {
-		$type = $this->connectionFactory->normalizeType($input->getArgument('type'));
-		if ($type === 'sqlite3') {
-			throw new \InvalidArgumentException(
-				'Converting to SQLite (sqlite3) is currently not supported.'
-			);
-		}
-		if ($type === $this->config->getSystemValue('dbtype', '')) {
-			throw new \InvalidArgumentException(sprintf(
-				'Can not convert from %1$s to %1$s.',
-				$type
-			));
-		}
-		if ($type === 'oci' && $input->getOption('clear-schema')) {
-			// Doctrine unconditionally tries (at least in version 2.3)
-			// to drop sequence triggers when dropping a table, even though
-			// such triggers may not exist. This results in errors like
-			// "ORA-04080: trigger 'OC_STORAGES_AI_PK' does not exist".
-			throw new \InvalidArgumentException(
-				'The --clear-schema option is not supported when converting to Oracle (oci).'
-			);
-		}
-	}
-
-	protected function readPassword(InputInterface $input, OutputInterface $output) {
-		// Explicitly specified password
-		if ($input->getOption('password')) {
-			return;
-		}
-
-		// Read from stdin. stream_set_blocking is used to prevent blocking
-		// when nothing is passed via stdin.
-		stream_set_blocking(STDIN, 0);
-		$password = file_get_contents('php://stdin');
-		stream_set_blocking(STDIN, 1);
-		if (trim($password) !== '') {
-			$input->setOption('password', $password);
-			return;
-		}
-
-		// Read password by interacting
-		if ($input->isInteractive()) {
-			/** @var QuestionHelper $helper */
-			$helper = $this->getHelper('question');
-			$question = new Question('What is the database password?');
-			$question->setHidden(true);
-			$question->setHiddenFallback(false);
-			$password = $helper->ask($input, $output, $question);
-			$input->setOption('password', $password);
-			return;
-		}
-	}
-
-	protected function execute(InputInterface $input, OutputInterface $output): int {
-		$this->validateInput($input, $output);
-		$this->readPassword($input, $output);
-
-		$fromDB = \OC::$server->getDatabaseConnection();
-		$toDB = $this->getToDBConnection($input, $output);
-
-		if ($input->getOption('clear-schema')) {
-			$this->clearSchema($toDB, $input, $output);
-		}
-
-		$this->createSchema($fromDB, $toDB, $input, $output);
-
-		$toTables = $this->getTables($toDB);
-		$fromTables = $this->getTables($fromDB);
-
-		// warn/fail if there are more tables in 'from' database
-		$extraFromTables = array_diff($fromTables, $toTables);
-		if (!empty($extraFromTables)) {
-			$output->writeln('<comment>The following tables will not be converted:</comment>');
-			$output->writeln($extraFromTables);
-			if (!$input->getOption('all-apps')) {
-				$output->writeln('<comment>Please note that tables belonging to available but currently not installed apps</comment>');
-				$output->writeln('<comment>can be included by specifying the --all-apps option.</comment>');
-			}
-
-			$continueConversion = !$input->isInteractive(); // assume yes for --no-interaction and no otherwise.
-			$question = new ConfirmationQuestion('Continue with the conversion (y/n)? [n] ', $continueConversion);
-
-			/** @var QuestionHelper $helper */
-			$helper = $this->getHelper('question');
-
-			if (!$helper->ask($input, $output, $question)) {
-				return 1;
-			}
-		}
-		$intersectingTables = array_intersect($toTables, $fromTables);
-		$this->convertDB($fromDB, $toDB, $intersectingTables, $input, $output);
-		return 0;
-	}
-
-	protected function createSchema(Connection $fromDB, Connection $toDB, InputInterface $input, OutputInterface $output) {
-		$output->writeln('<info>Creating schema in new database</info>');
-
-		$fromMS = new MigrationService('core', $fromDB);
-		$currentMigration = $fromMS->getMigration('current');
-		if ($currentMigration !== '0') {
-			$toMS = new MigrationService('core', $toDB);
-			$toMS->migrate($currentMigration);
-		}
-
-		$schemaManager = new \OC\DB\MDB2SchemaManager($toDB);
-		$apps = $input->getOption('all-apps') ? \OC_App::getAllApps() : \OC_App::getEnabledApps();
-		foreach ($apps as $app) {
-			if (file_exists(\OC_App::getAppPath($app).'/appinfo/database.xml')) {
-				$schemaManager->createDbFromStructure(\OC_App::getAppPath($app).'/appinfo/database.xml');
-			} else {
-				// Make sure autoloading works...
-				\OC_App::loadApp($app);
-				$fromMS = new MigrationService($app, $fromDB);
-				$currentMigration = $fromMS->getMigration('current');
-				if ($currentMigration !== '0') {
-					$toMS = new MigrationService($app, $toDB);
-					$toMS->migrate($currentMigration, true);
-				}
-			}
-		}
-	}
-
-	protected function getToDBConnection(InputInterface $input, OutputInterface $output) {
-		$type = $input->getArgument('type');
-		$connectionParams = $this->connectionFactory->createConnectionParams();
-		$connectionParams = array_merge($connectionParams, [
-			'host' => $input->getArgument('hostname'),
-			'user' => $input->getArgument('username'),
-			'password' => $input->getOption('password'),
-			'dbname' => $input->getArgument('database'),
-		]);
-		if ($input->getOption('port')) {
-			$connectionParams['port'] = $input->getOption('port');
-		}
-		return $this->connectionFactory->getConnection($type, $connectionParams);
-	}
-
-	protected function clearSchema(Connection $db, InputInterface $input, OutputInterface $output) {
-		$toTables = $this->getTables($db);
-		if (!empty($toTables)) {
-			$output->writeln('<info>Clearing schema in new database</info>');
-		}
-		foreach ($toTables as $table) {
-			$db->getSchemaManager()->dropTable($table);
-		}
-	}
-
-	protected function getTables(Connection $db) {
-		$filterExpression = '/^' . preg_quote($this->config->getSystemValue('dbtableprefix', 'oc_')) . '/';
-		$db->getConfiguration()->
-			setFilterSchemaAssetsExpression($filterExpression);
-		return $db->getSchemaManager()->listTableNames();
-	}
-
-	/**
-	 * @param Connection $fromDB
-	 * @param Connection $toDB
-	 * @param Table $table
-	 * @param InputInterface $input
-	 * @param OutputInterface $output
-	 */
-	protected function copyTable(Connection $fromDB, Connection $toDB, Table $table, InputInterface $input, OutputInterface $output) {
-		if ($table->getName() === $toDB->getPrefix() . 'migrations') {
-			$output->writeln('<comment>Skipping migrations table because it was already filled by running the migrations</comment>');
-			return;
-		}
-
-		$chunkSize = $input->getOption('chunk-size');
-
-		$query = $fromDB->getQueryBuilder();
-		$query->automaticTablePrefix(false);
-		$query->select($query->func()->count('*', 'num_entries'))
-			->from($table->getName());
-		$result = $query->execute();
-		$count = $result->fetchColumn();
-		$result->closeCursor();
-
-		$numChunks = ceil($count/$chunkSize);
-		if ($numChunks > 1) {
-			$output->writeln('chunked query, ' . $numChunks . ' chunks');
-		}
-
-		$progress = new ProgressBar($output, $count);
-		$progress->start();
-		$redraw = $count > $chunkSize ? 100 : ($count > 100 ? 5 : 1);
-		$progress->setRedrawFrequency($redraw);
-
-		$query = $fromDB->getQueryBuilder();
-		$query->automaticTablePrefix(false);
-		$query->select('*')
-			->from($table->getName())
-			->setMaxResults($chunkSize);
-
-		try {
-			$orderColumns = $table->getPrimaryKeyColumns();
-		} catch (DBALException $e) {
-			$orderColumns = [];
-			foreach ($table->getColumns() as $column) {
-				$orderColumns[] = $column->getName();
-			}
-		}
-
-		foreach ($orderColumns as $column) {
-			$query->addOrderBy($column);
-		}
-
-		$insertQuery = $toDB->getQueryBuilder();
-		$insertQuery->automaticTablePrefix(false);
-		$insertQuery->insert($table->getName());
-		$parametersCreated = false;
-
-		for ($chunk = 0; $chunk < $numChunks; $chunk++) {
-			$query->setFirstResult($chunk * $chunkSize);
-
-			$result = $query->execute();
-
-			while ($row = $result->fetch()) {
-				$progress->advance();
-				if (!$parametersCreated) {
-					foreach ($row as $key => $value) {
-						$insertQuery->setValue($key, $insertQuery->createParameter($key));
-					}
-					$parametersCreated = true;
-				}
-
-				foreach ($row as $key => $value) {
-					$type = $this->getColumnType($table, $key);
-					if ($type !== false) {
-						$insertQuery->setParameter($key, $value, $type);
-					} else {
-						$insertQuery->setParameter($key, $value);
-					}
-				}
-				$insertQuery->execute();
-			}
-			$result->closeCursor();
-		}
-		$progress->finish();
-	}
-
-	protected function getColumnType(Table $table, $columnName) {
-		$tableName = $table->getName();
-		if (isset($this->columnTypes[$tableName][$columnName])) {
-			return $this->columnTypes[$tableName][$columnName];
-		}
-
-		$type = $table->getColumn($columnName)->getType()->getName();
-
-		switch ($type) {
-			case Type::BLOB:
-			case Type::TEXT:
-				$this->columnTypes[$tableName][$columnName] = IQueryBuilder::PARAM_LOB;
-				break;
-			case Type::BOOLEAN:
-				$this->columnTypes[$tableName][$columnName] = IQueryBuilder::PARAM_BOOL;
-				break;
-			default:
-				$this->columnTypes[$tableName][$columnName] = false;
-		}
-
-		return $this->columnTypes[$tableName][$columnName];
-	}
-
-	protected function convertDB(Connection $fromDB, Connection $toDB, array $tables, InputInterface $input, OutputInterface $output) {
-		$this->config->setSystemValue('maintenance', true);
-		$schema = $fromDB->createSchema();
-
-		try {
-			// copy table rows
-			foreach ($tables as $table) {
-				$output->writeln($table);
-				$this->copyTable($fromDB, $toDB, $schema->getTable($table), $input, $output);
-			}
-			if ($input->getArgument('type') === 'pgsql') {
-				$tools = new \OC\DB\PgSqlTools($this->config);
-				$tools->resynchronizeDatabaseSequences($toDB);
-			}
-			// save new database config
-			$this->saveDBInfo($input);
-		} catch (\Exception $e) {
-			$this->config->setSystemValue('maintenance', false);
-			throw $e;
-		}
-		$this->config->setSystemValue('maintenance', false);
-	}
-
-	protected function saveDBInfo(InputInterface $input) {
-		$type = $input->getArgument('type');
-		$username = $input->getArgument('username');
-		$dbHost = $input->getArgument('hostname');
-		$dbName = $input->getArgument('database');
-		$password = $input->getOption('password');
-		if ($input->getOption('port')) {
-			$dbHost .= ':'.$input->getOption('port');
-		}
-
-		$this->config->setSystemValues([
-			'dbtype'		=> $type,
-			'dbname'		=> $dbName,
-			'dbhost'		=> $dbHost,
-			'dbuser'		=> $username,
-			'dbpassword'	=> $password,
-		]);
-	}
-
-	/**
-	 * Return possible values for the named option
-	 *
-	 * @param string $optionName
-	 * @param CompletionContext $context
-	 * @return string[]
-	 */
-	public function completeOptionValues($optionName, CompletionContext $context) {
-		return [];
-	}
-
-	/**
-	 * Return possible values for the named argument
-	 *
-	 * @param string $argumentName
-	 * @param CompletionContext $context
-	 * @return string[]
-	 */
-	public function completeArgumentValues($argumentName, CompletionContext $context) {
-		if ($argumentName === 'type') {
-			return ['mysql', 'oci', 'pgsql'];
-		}
-		return [];
-	}
+    /**
+     * @var \OCP\IConfig
+     */
+    protected $config;
+
+    /**
+     * @var \OC\DB\ConnectionFactory
+     */
+    protected $connectionFactory;
+
+    /** @var array */
+    protected $columnTypes;
+
+    /**
+     * @param \OCP\IConfig $config
+     * @param \OC\DB\ConnectionFactory $connectionFactory
+     */
+    public function __construct(IConfig $config, ConnectionFactory $connectionFactory) {
+        $this->config = $config;
+        $this->connectionFactory = $connectionFactory;
+        parent::__construct();
+    }
+
+    protected function configure() {
+        $this
+            ->setName('db:convert-type')
+            ->setDescription('Convert the Nextcloud database to the newly configured one')
+            ->addArgument(
+                'type',
+                InputArgument::REQUIRED,
+                'the type of the database to convert to'
+            )
+            ->addArgument(
+                'username',
+                InputArgument::REQUIRED,
+                'the username of the database to convert to'
+            )
+            ->addArgument(
+                'hostname',
+                InputArgument::REQUIRED,
+                'the hostname of the database to convert to'
+            )
+            ->addArgument(
+                'database',
+                InputArgument::REQUIRED,
+                'the name of the database to convert to'
+            )
+            ->addOption(
+                'port',
+                null,
+                InputOption::VALUE_REQUIRED,
+                'the port of the database to convert to'
+            )
+            ->addOption(
+                'password',
+                null,
+                InputOption::VALUE_REQUIRED,
+                'the password of the database to convert to. Will be asked when not specified. Can also be passed via stdin.'
+            )
+            ->addOption(
+                'clear-schema',
+                null,
+                InputOption::VALUE_NONE,
+                'remove all tables from the destination database'
+            )
+            ->addOption(
+                'all-apps',
+                null,
+                InputOption::VALUE_NONE,
+                'whether to create schema for all apps instead of only installed apps'
+            )
+            ->addOption(
+                'chunk-size',
+                null,
+                InputOption::VALUE_REQUIRED,
+                'the maximum number of database rows to handle in a single query, bigger tables will be handled in chunks of this size. Lower this if the process runs out of memory during conversion.',
+                1000
+            )
+        ;
+    }
+
+    protected function validateInput(InputInterface $input, OutputInterface $output) {
+        $type = $this->connectionFactory->normalizeType($input->getArgument('type'));
+        if ($type === 'sqlite3') {
+            throw new \InvalidArgumentException(
+                'Converting to SQLite (sqlite3) is currently not supported.'
+            );
+        }
+        if ($type === $this->config->getSystemValue('dbtype', '')) {
+            throw new \InvalidArgumentException(sprintf(
+                'Can not convert from %1$s to %1$s.',
+                $type
+            ));
+        }
+        if ($type === 'oci' && $input->getOption('clear-schema')) {
+            // Doctrine unconditionally tries (at least in version 2.3)
+            // to drop sequence triggers when dropping a table, even though
+            // such triggers may not exist. This results in errors like
+            // "ORA-04080: trigger 'OC_STORAGES_AI_PK' does not exist".
+            throw new \InvalidArgumentException(
+                'The --clear-schema option is not supported when converting to Oracle (oci).'
+            );
+        }
+    }
+
+    protected function readPassword(InputInterface $input, OutputInterface $output) {
+        // Explicitly specified password
+        if ($input->getOption('password')) {
+            return;
+        }
+
+        // Read from stdin. stream_set_blocking is used to prevent blocking
+        // when nothing is passed via stdin.
+        stream_set_blocking(STDIN, 0);
+        $password = file_get_contents('php://stdin');
+        stream_set_blocking(STDIN, 1);
+        if (trim($password) !== '') {
+            $input->setOption('password', $password);
+            return;
+        }
+
+        // Read password by interacting
+        if ($input->isInteractive()) {
+            /** @var QuestionHelper $helper */
+            $helper = $this->getHelper('question');
+            $question = new Question('What is the database password?');
+            $question->setHidden(true);
+            $question->setHiddenFallback(false);
+            $password = $helper->ask($input, $output, $question);
+            $input->setOption('password', $password);
+            return;
+        }
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int {
+        $this->validateInput($input, $output);
+        $this->readPassword($input, $output);
+
+        $fromDB = \OC::$server->getDatabaseConnection();
+        $toDB = $this->getToDBConnection($input, $output);
+
+        if ($input->getOption('clear-schema')) {
+            $this->clearSchema($toDB, $input, $output);
+        }
+
+        $this->createSchema($fromDB, $toDB, $input, $output);
+
+        $toTables = $this->getTables($toDB);
+        $fromTables = $this->getTables($fromDB);
+
+        // warn/fail if there are more tables in 'from' database
+        $extraFromTables = array_diff($fromTables, $toTables);
+        if (!empty($extraFromTables)) {
+            $output->writeln('<comment>The following tables will not be converted:</comment>');
+            $output->writeln($extraFromTables);
+            if (!$input->getOption('all-apps')) {
+                $output->writeln('<comment>Please note that tables belonging to available but currently not installed apps</comment>');
+                $output->writeln('<comment>can be included by specifying the --all-apps option.</comment>');
+            }
+
+            $continueConversion = !$input->isInteractive(); // assume yes for --no-interaction and no otherwise.
+            $question = new ConfirmationQuestion('Continue with the conversion (y/n)? [n] ', $continueConversion);
+
+            /** @var QuestionHelper $helper */
+            $helper = $this->getHelper('question');
+
+            if (!$helper->ask($input, $output, $question)) {
+                return 1;
+            }
+        }
+        $intersectingTables = array_intersect($toTables, $fromTables);
+        $this->convertDB($fromDB, $toDB, $intersectingTables, $input, $output);
+        return 0;
+    }
+
+    protected function createSchema(Connection $fromDB, Connection $toDB, InputInterface $input, OutputInterface $output) {
+        $output->writeln('<info>Creating schema in new database</info>');
+
+        $fromMS = new MigrationService('core', $fromDB);
+        $currentMigration = $fromMS->getMigration('current');
+        if ($currentMigration !== '0') {
+            $toMS = new MigrationService('core', $toDB);
+            $toMS->migrate($currentMigration);
+        }
+
+        $schemaManager = new \OC\DB\MDB2SchemaManager($toDB);
+        $apps = $input->getOption('all-apps') ? \OC_App::getAllApps() : \OC_App::getEnabledApps();
+        foreach ($apps as $app) {
+            if (file_exists(\OC_App::getAppPath($app).'/appinfo/database.xml')) {
+                $schemaManager->createDbFromStructure(\OC_App::getAppPath($app).'/appinfo/database.xml');
+            } else {
+                // Make sure autoloading works...
+                \OC_App::loadApp($app);
+                $fromMS = new MigrationService($app, $fromDB);
+                $currentMigration = $fromMS->getMigration('current');
+                if ($currentMigration !== '0') {
+                    $toMS = new MigrationService($app, $toDB);
+                    $toMS->migrate($currentMigration, true);
+                }
+            }
+        }
+    }
+
+    protected function getToDBConnection(InputInterface $input, OutputInterface $output) {
+        $type = $input->getArgument('type');
+        $connectionParams = $this->connectionFactory->createConnectionParams();
+        $connectionParams = array_merge($connectionParams, [
+            'host' => $input->getArgument('hostname'),
+            'user' => $input->getArgument('username'),
+            'password' => $input->getOption('password'),
+            'dbname' => $input->getArgument('database'),
+        ]);
+        if ($input->getOption('port')) {
+            $connectionParams['port'] = $input->getOption('port');
+        }
+        return $this->connectionFactory->getConnection($type, $connectionParams);
+    }
+
+    protected function clearSchema(Connection $db, InputInterface $input, OutputInterface $output) {
+        $toTables = $this->getTables($db);
+        if (!empty($toTables)) {
+            $output->writeln('<info>Clearing schema in new database</info>');
+        }
+        foreach ($toTables as $table) {
+            $db->getSchemaManager()->dropTable($table);
+        }
+    }
+
+    protected function getTables(Connection $db) {
+        $filterExpression = '/^' . preg_quote($this->config->getSystemValue('dbtableprefix', 'oc_')) . '/';
+        $db->getConfiguration()->
+            setFilterSchemaAssetsExpression($filterExpression);
+        return $db->getSchemaManager()->listTableNames();
+    }
+
+    /**
+     * @param Connection $fromDB
+     * @param Connection $toDB
+     * @param Table $table
+     * @param InputInterface $input
+     * @param OutputInterface $output
+     */
+    protected function copyTable(Connection $fromDB, Connection $toDB, Table $table, InputInterface $input, OutputInterface $output) {
+        if ($table->getName() === $toDB->getPrefix() . 'migrations') {
+            $output->writeln('<comment>Skipping migrations table because it was already filled by running the migrations</comment>');
+            return;
+        }
+
+        $chunkSize = $input->getOption('chunk-size');
+
+        $query = $fromDB->getQueryBuilder();
+        $query->automaticTablePrefix(false);
+        $query->select($query->func()->count('*', 'num_entries'))
+            ->from($table->getName());
+        $result = $query->execute();
+        $count = $result->fetchColumn();
+        $result->closeCursor();
+
+        $numChunks = ceil($count/$chunkSize);
+        if ($numChunks > 1) {
+            $output->writeln('chunked query, ' . $numChunks . ' chunks');
+        }
+
+        $progress = new ProgressBar($output, $count);
+        $progress->start();
+        $redraw = $count > $chunkSize ? 100 : ($count > 100 ? 5 : 1);
+        $progress->setRedrawFrequency($redraw);
+
+        $query = $fromDB->getQueryBuilder();
+        $query->automaticTablePrefix(false);
+        $query->select('*')
+            ->from($table->getName())
+            ->setMaxResults($chunkSize);
+
+        try {
+            $orderColumns = $table->getPrimaryKeyColumns();
+        } catch (DBALException $e) {
+            $orderColumns = [];
+            foreach ($table->getColumns() as $column) {
+                $orderColumns[] = $column->getName();
+            }
+        }
+
+        foreach ($orderColumns as $column) {
+            $query->addOrderBy($column);
+        }
+
+        $insertQuery = $toDB->getQueryBuilder();
+        $insertQuery->automaticTablePrefix(false);
+        $insertQuery->insert($table->getName());
+        $parametersCreated = false;
+
+        for ($chunk = 0; $chunk < $numChunks; $chunk++) {
+            $query->setFirstResult($chunk * $chunkSize);
+
+            $result = $query->execute();
+
+            while ($row = $result->fetch()) {
+                $progress->advance();
+                if (!$parametersCreated) {
+                    foreach ($row as $key => $value) {
+                        $insertQuery->setValue($key, $insertQuery->createParameter($key));
+                    }
+                    $parametersCreated = true;
+                }
+
+                foreach ($row as $key => $value) {
+                    $type = $this->getColumnType($table, $key);
+                    if ($type !== false) {
+                        $insertQuery->setParameter($key, $value, $type);
+                    } else {
+                        $insertQuery->setParameter($key, $value);
+                    }
+                }
+                $insertQuery->execute();
+            }
+            $result->closeCursor();
+        }
+        $progress->finish();
+    }
+
+    protected function getColumnType(Table $table, $columnName) {
+        $tableName = $table->getName();
+        if (isset($this->columnTypes[$tableName][$columnName])) {
+            return $this->columnTypes[$tableName][$columnName];
+        }
+
+        $type = $table->getColumn($columnName)->getType()->getName();
+
+        switch ($type) {
+            case Type::BLOB:
+            case Type::TEXT:
+                $this->columnTypes[$tableName][$columnName] = IQueryBuilder::PARAM_LOB;
+                break;
+            case Type::BOOLEAN:
+                $this->columnTypes[$tableName][$columnName] = IQueryBuilder::PARAM_BOOL;
+                break;
+            default:
+                $this->columnTypes[$tableName][$columnName] = false;
+        }
+
+        return $this->columnTypes[$tableName][$columnName];
+    }
+
+    protected function convertDB(Connection $fromDB, Connection $toDB, array $tables, InputInterface $input, OutputInterface $output) {
+        $this->config->setSystemValue('maintenance', true);
+        $schema = $fromDB->createSchema();
+
+        try {
+            // copy table rows
+            foreach ($tables as $table) {
+                $output->writeln($table);
+                $this->copyTable($fromDB, $toDB, $schema->getTable($table), $input, $output);
+            }
+            if ($input->getArgument('type') === 'pgsql') {
+                $tools = new \OC\DB\PgSqlTools($this->config);
+                $tools->resynchronizeDatabaseSequences($toDB);
+            }
+            // save new database config
+            $this->saveDBInfo($input);
+        } catch (\Exception $e) {
+            $this->config->setSystemValue('maintenance', false);
+            throw $e;
+        }
+        $this->config->setSystemValue('maintenance', false);
+    }
+
+    protected function saveDBInfo(InputInterface $input) {
+        $type = $input->getArgument('type');
+        $username = $input->getArgument('username');
+        $dbHost = $input->getArgument('hostname');
+        $dbName = $input->getArgument('database');
+        $password = $input->getOption('password');
+        if ($input->getOption('port')) {
+            $dbHost .= ':'.$input->getOption('port');
+        }
+
+        $this->config->setSystemValues([
+            'dbtype'		=> $type,
+            'dbname'		=> $dbName,
+            'dbhost'		=> $dbHost,
+            'dbuser'		=> $username,
+            'dbpassword'	=> $password,
+        ]);
+    }
+
+    /**
+     * Return possible values for the named option
+     *
+     * @param string $optionName
+     * @param CompletionContext $context
+     * @return string[]
+     */
+    public function completeOptionValues($optionName, CompletionContext $context) {
+        return [];
+    }
+
+    /**
+     * Return possible values for the named argument
+     *
+     * @param string $argumentName
+     * @param CompletionContext $context
+     * @return string[]
+     */
+    public function completeArgumentValues($argumentName, CompletionContext $context) {
+        if ($argumentName === 'type') {
+            return ['mysql', 'oci', 'pgsql'];
+        }
+        return [];
+    }
 }

Spacing +4 added lines, -4 removed lines

@@ -283,7 +283,7 @@ 
 	}
 
 	protected function getTables(Connection $db) {
-		$filterExpression = '/^' . preg_quote($this->config->getSystemValue('dbtableprefix', 'oc_')) . '/';
+		$filterExpression = '/^'.preg_quote($this->config->getSystemValue('dbtableprefix', 'oc_')).'/';
 		$db->getConfiguration()->
 			setFilterSchemaAssetsExpression($filterExpression);
 		return $db->getSchemaManager()->listTableNames();
@@ -297,7 +297,7 @@ 
 	 * @param OutputInterface $output
 	 */
 	protected function copyTable(Connection $fromDB, Connection $toDB, Table $table, InputInterface $input, OutputInterface $output) {
-		if ($table->getName() === $toDB->getPrefix() . 'migrations') {
+		if ($table->getName() === $toDB->getPrefix().'migrations') {
 			$output->writeln('<comment>Skipping migrations table because it was already filled by running the migrations</comment>');
 			return;
 		}
@@ -312,9 +312,9 @@ 
 		$count = $result->fetchColumn();
 		$result->closeCursor();
 
-		$numChunks = ceil($count/$chunkSize);
+		$numChunks = ceil($count / $chunkSize);
 		if ($numChunks > 1) {
-			$output->writeln('chunked query, ' . $numChunks . ' chunks');
+			$output->writeln('chunked query, '.$numChunks.' chunks');
 		}
 
 		$progress = new ProgressBar($output, $count);

apps/files_external/lib/Service/DBConfigService.php

Indentation +493 added lines, -493 removed lines

@@ -37,497 +37,497 @@
  * Stores the mount config in the database
  */
 class DBConfigService {
-	public const MOUNT_TYPE_ADMIN = 1;
-	public const MOUNT_TYPE_PERSONAl = 2;
-
-	public const APPLICABLE_TYPE_GLOBAL = 1;
-	public const APPLICABLE_TYPE_GROUP = 2;
-	public const APPLICABLE_TYPE_USER = 3;
-
-	/**
-	 * @var IDBConnection
-	 */
-	private $connection;
-
-	/**
-	 * @var ICrypto
-	 */
-	private $crypto;
-
-	/**
-	 * DBConfigService constructor.
-	 *
-	 * @param IDBConnection $connection
-	 * @param ICrypto $crypto
-	 */
-	public function __construct(IDBConnection $connection, ICrypto $crypto) {
-		$this->connection = $connection;
-		$this->crypto = $crypto;
-	}
-
-	/**
-	 * @param int $mountId
-	 * @return array
-	 */
-	public function getMountById($mountId) {
-		$builder = $this->connection->getQueryBuilder();
-		$query = $builder->select(['mount_id', 'mount_point', 'storage_backend', 'auth_backend', 'priority', 'type'])
-			->from('external_mounts', 'm')
-			->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
-		$mounts = $this->getMountsFromQuery($query);
-		if (count($mounts) > 0) {
-			return $mounts[0];
-		} else {
-			return null;
-		}
-	}
-
-	/**
-	 * Get all configured mounts
-	 *
-	 * @return array
-	 */
-	public function getAllMounts() {
-		$builder = $this->connection->getQueryBuilder();
-		$query = $builder->select(['mount_id', 'mount_point', 'storage_backend', 'auth_backend', 'priority', 'type'])
-			->from('external_mounts');
-		return $this->getMountsFromQuery($query);
-	}
-
-	public function getMountsForUser($userId, $groupIds) {
-		$builder = $this->connection->getQueryBuilder();
-		$query = $builder->select(['m.mount_id', 'mount_point', 'storage_backend', 'auth_backend', 'priority', 'm.type'])
-			->from('external_mounts', 'm')
-			->innerJoin('m', 'external_applicable', 'a', $builder->expr()->eq('m.mount_id', 'a.mount_id'))
-			->where($builder->expr()->orX(
-				$builder->expr()->andX( // global mounts
-					$builder->expr()->eq('a.type', $builder->createNamedParameter(self::APPLICABLE_TYPE_GLOBAL, IQueryBuilder::PARAM_INT)),
-					$builder->expr()->isNull('a.value')
-				),
-				$builder->expr()->andX( // mounts for user
-					$builder->expr()->eq('a.type', $builder->createNamedParameter(self::APPLICABLE_TYPE_USER, IQueryBuilder::PARAM_INT)),
-					$builder->expr()->eq('a.value', $builder->createNamedParameter($userId))
-				),
-				$builder->expr()->andX( // mounts for group
-					$builder->expr()->eq('a.type', $builder->createNamedParameter(self::APPLICABLE_TYPE_GROUP, IQueryBuilder::PARAM_INT)),
-					$builder->expr()->in('a.value', $builder->createNamedParameter($groupIds, IQueryBuilder::PARAM_STR_ARRAY))
-				)
-			));
-
-		return $this->getMountsFromQuery($query);
-	}
-
-	public function modifyMountsOnUserDelete(string $uid): void {
-		$this->modifyMountsOnDelete($uid, self::APPLICABLE_TYPE_USER);
-	}
-
-	public function modifyMountsOnGroupDelete(string $gid): void {
-		$this->modifyMountsOnDelete($gid, self::APPLICABLE_TYPE_GROUP);
-	}
-
-	protected function modifyMountsOnDelete(string $applicableId, int $applicableType): void {
-		$builder = $this->connection->getQueryBuilder();
-		$query = $builder->select(['a.mount_id', $builder->func()->count('a.mount_id', 'count')])
-			->from('external_applicable', 'a')
-			->leftJoin('a', 'external_applicable', 'b', $builder->expr()->eq('a.mount_id', 'b.mount_id'))
-			->where($builder->expr()->andX(
-				$builder->expr()->eq('b.type', $builder->createNamedParameter($applicableType, IQueryBuilder::PARAM_INT)),
-				$builder->expr()->eq('b.value', $builder->createNamedParameter($applicableId))
-			)
-			)
-			->groupBy(['a.mount_id']);
-		$stmt = $query->execute();
-		$result = $stmt->fetchAll();
-		$stmt->closeCursor();
-
-		foreach ($result as $row) {
-			if ((int)$row['count'] > 1) {
-				$this->removeApplicable($row['mount_id'], $applicableType, $applicableId);
-			} else {
-				$this->removeMount($row['mount_id']);
-			}
-		}
-	}
-
-	/**
-	 * Get admin defined mounts
-	 *
-	 * @return array
-	 */
-	public function getAdminMounts() {
-		$builder = $this->connection->getQueryBuilder();
-		$query = $builder->select(['mount_id', 'mount_point', 'storage_backend', 'auth_backend', 'priority', 'type'])
-			->from('external_mounts')
-			->where($builder->expr()->eq('type', $builder->expr()->literal(self::MOUNT_TYPE_ADMIN, IQueryBuilder::PARAM_INT)));
-		return $this->getMountsFromQuery($query);
-	}
-
-	protected function getForQuery(IQueryBuilder $builder, $type, $value) {
-		$query = $builder->select(['m.mount_id', 'mount_point', 'storage_backend', 'auth_backend', 'priority', 'm.type'])
-			->from('external_mounts', 'm')
-			->innerJoin('m', 'external_applicable', 'a', $builder->expr()->eq('m.mount_id', 'a.mount_id'))
-			->where($builder->expr()->eq('a.type', $builder->createNamedParameter($type, IQueryBuilder::PARAM_INT)));
-
-		if (is_null($value)) {
-			$query = $query->andWhere($builder->expr()->isNull('a.value'));
-		} else {
-			$query = $query->andWhere($builder->expr()->eq('a.value', $builder->createNamedParameter($value)));
-		}
-
-		return $query;
-	}
-
-	/**
-	 * Get mounts by applicable
-	 *
-	 * @param int $type any of the self::APPLICABLE_TYPE_ constants
-	 * @param string|null $value user_id, group_id or null for global mounts
-	 * @return array
-	 */
-	public function getMountsFor($type, $value) {
-		$builder = $this->connection->getQueryBuilder();
-		$query = $this->getForQuery($builder, $type, $value);
-
-		return $this->getMountsFromQuery($query);
-	}
-
-	/**
-	 * Get admin defined mounts by applicable
-	 *
-	 * @param int $type any of the self::APPLICABLE_TYPE_ constants
-	 * @param string|null $value user_id, group_id or null for global mounts
-	 * @return array
-	 */
-	public function getAdminMountsFor($type, $value) {
-		$builder = $this->connection->getQueryBuilder();
-		$query = $this->getForQuery($builder, $type, $value);
-		$query->andWhere($builder->expr()->eq('m.type', $builder->expr()->literal(self::MOUNT_TYPE_ADMIN, IQueryBuilder::PARAM_INT)));
-
-		return $this->getMountsFromQuery($query);
-	}
-
-	/**
-	 * Get admin defined mounts for multiple applicable
-	 *
-	 * @param int $type any of the self::APPLICABLE_TYPE_ constants
-	 * @param string[] $values user_ids or group_ids
-	 * @return array
-	 */
-	public function getAdminMountsForMultiple($type, array $values) {
-		$builder = $this->connection->getQueryBuilder();
-		$params = array_map(function ($value) use ($builder) {
-			return $builder->createNamedParameter($value, IQueryBuilder::PARAM_STR);
-		}, $values);
-
-		$query = $builder->select(['m.mount_id', 'mount_point', 'storage_backend', 'auth_backend', 'priority', 'm.type'])
-			->from('external_mounts', 'm')
-			->innerJoin('m', 'external_applicable', 'a', $builder->expr()->eq('m.mount_id', 'a.mount_id'))
-			->where($builder->expr()->eq('a.type', $builder->createNamedParameter($type, IQueryBuilder::PARAM_INT)))
-			->andWhere($builder->expr()->in('a.value', $params));
-		$query->andWhere($builder->expr()->eq('m.type', $builder->expr()->literal(self::MOUNT_TYPE_ADMIN, IQueryBuilder::PARAM_INT)));
-
-		return $this->getMountsFromQuery($query);
-	}
-
-	/**
-	 * Get user defined mounts by applicable
-	 *
-	 * @param int $type any of the self::APPLICABLE_TYPE_ constants
-	 * @param string|null $value user_id, group_id or null for global mounts
-	 * @return array
-	 */
-	public function getUserMountsFor($type, $value) {
-		$builder = $this->connection->getQueryBuilder();
-		$query = $this->getForQuery($builder, $type, $value);
-		$query->andWhere($builder->expr()->eq('m.type', $builder->expr()->literal(self::MOUNT_TYPE_PERSONAl, IQueryBuilder::PARAM_INT)));
-
-		return $this->getMountsFromQuery($query);
-	}
-
-	/**
-	 * Add a mount to the database
-	 *
-	 * @param string $mountPoint
-	 * @param string $storageBackend
-	 * @param string $authBackend
-	 * @param int $priority
-	 * @param int $type self::MOUNT_TYPE_ADMIN or self::MOUNT_TYPE_PERSONAL
-	 * @return int the id of the new mount
-	 */
-	public function addMount($mountPoint, $storageBackend, $authBackend, $priority, $type) {
-		if (!$priority) {
-			$priority = 100;
-		}
-		$builder = $this->connection->getQueryBuilder();
-		$query = $builder->insert('external_mounts')
-			->values([
-				'mount_point' => $builder->createNamedParameter($mountPoint, IQueryBuilder::PARAM_STR),
-				'storage_backend' => $builder->createNamedParameter($storageBackend, IQueryBuilder::PARAM_STR),
-				'auth_backend' => $builder->createNamedParameter($authBackend, IQueryBuilder::PARAM_STR),
-				'priority' => $builder->createNamedParameter($priority, IQueryBuilder::PARAM_INT),
-				'type' => $builder->createNamedParameter($type, IQueryBuilder::PARAM_INT)
-			]);
-		$query->execute();
-		return (int)$this->connection->lastInsertId('*PREFIX*external_mounts');
-	}
-
-	/**
-	 * Remove a mount from the database
-	 *
-	 * @param int $mountId
-	 */
-	public function removeMount($mountId) {
-		$builder = $this->connection->getQueryBuilder();
-		$query = $builder->delete('external_mounts')
-			->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
-		$query->execute();
-
-		$query = $builder->delete('external_applicable')
-			->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
-		$query->execute();
-
-		$query = $builder->delete('external_config')
-			->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
-		$query->execute();
-
-		$query = $builder->delete('external_options')
-			->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
-		$query->execute();
-	}
-
-	/**
-	 * @param int $mountId
-	 * @param string $newMountPoint
-	 */
-	public function setMountPoint($mountId, $newMountPoint) {
-		$builder = $this->connection->getQueryBuilder();
-
-		$query = $builder->update('external_mounts')
-			->set('mount_point', $builder->createNamedParameter($newMountPoint))
-			->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
-
-		$query->execute();
-	}
-
-	/**
-	 * @param int $mountId
-	 * @param string $newAuthBackend
-	 */
-	public function setAuthBackend($mountId, $newAuthBackend) {
-		$builder = $this->connection->getQueryBuilder();
-
-		$query = $builder->update('external_mounts')
-			->set('auth_backend', $builder->createNamedParameter($newAuthBackend))
-			->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
-
-		$query->execute();
-	}
-
-	/**
-	 * @param int $mountId
-	 * @param string $key
-	 * @param string $value
-	 */
-	public function setConfig($mountId, $key, $value) {
-		if ($key === 'password') {
-			$value = $this->encryptValue($value);
-		}
-
-		try {
-			$builder = $this->connection->getQueryBuilder();
-			$builder->insert('external_config')
-				->setValue('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT))
-				->setValue('key', $builder->createNamedParameter($key, IQueryBuilder::PARAM_STR))
-				->setValue('value', $builder->createNamedParameter($value, IQueryBuilder::PARAM_STR))
-				->execute();
-		} catch (UniqueConstraintViolationException $e) {
-			$builder = $this->connection->getQueryBuilder();
-			$query = $builder->update('external_config')
-				->set('value', $builder->createNamedParameter($value, IQueryBuilder::PARAM_STR))
-				->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)))
-				->andWhere($builder->expr()->eq('key', $builder->createNamedParameter($key, IQueryBuilder::PARAM_STR)));
-			$query->execute();
-		}
-	}
-
-	/**
-	 * @param int $mountId
-	 * @param string $key
-	 * @param string $value
-	 */
-	public function setOption($mountId, $key, $value) {
-		try {
-			$builder = $this->connection->getQueryBuilder();
-			$builder->insert('external_options')
-				->setValue('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT))
-				->setValue('key', $builder->createNamedParameter($key, IQueryBuilder::PARAM_STR))
-				->setValue('value', $builder->createNamedParameter(json_encode($value), IQueryBuilder::PARAM_STR))
-				->execute();
-		} catch (UniqueConstraintViolationException $e) {
-			$builder = $this->connection->getQueryBuilder();
-			$query = $builder->update('external_options')
-				->set('value', $builder->createNamedParameter(json_encode($value), IQueryBuilder::PARAM_STR))
-				->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)))
-				->andWhere($builder->expr()->eq('key', $builder->createNamedParameter($key, IQueryBuilder::PARAM_STR)));
-			$query->execute();
-		}
-	}
-
-	public function addApplicable($mountId, $type, $value) {
-		try {
-			$builder = $this->connection->getQueryBuilder();
-			$builder->insert('external_applicable')
-				->setValue('mount_id', $builder->createNamedParameter($mountId))
-				->setValue('type', $builder->createNamedParameter($type))
-				->setValue('value', $builder->createNamedParameter($value))
-				->execute();
-		} catch (UniqueConstraintViolationException $e) {
-			// applicable exists already
-		}
-	}
-
-	public function removeApplicable($mountId, $type, $value) {
-		$builder = $this->connection->getQueryBuilder();
-		$query = $builder->delete('external_applicable')
-			->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)))
-			->andWhere($builder->expr()->eq('type', $builder->createNamedParameter($type, IQueryBuilder::PARAM_INT)));
-
-		if (is_null($value)) {
-			$query = $query->andWhere($builder->expr()->isNull('value'));
-		} else {
-			$query = $query->andWhere($builder->expr()->eq('value', $builder->createNamedParameter($value, IQueryBuilder::PARAM_STR)));
-		}
-
-		$query->execute();
-	}
-
-	private function getMountsFromQuery(IQueryBuilder $query) {
-		$result = $query->execute();
-		$mounts = $result->fetchAll();
-		$uniqueMounts = [];
-		foreach ($mounts as $mount) {
-			$id = $mount['mount_id'];
-			if (!isset($uniqueMounts[$id])) {
-				$uniqueMounts[$id] = $mount;
-			}
-		}
-		$uniqueMounts = array_values($uniqueMounts);
-
-		$mountIds = array_map(function ($mount) {
-			return $mount['mount_id'];
-		}, $uniqueMounts);
-		$mountIds = array_values(array_unique($mountIds));
-
-		$applicable = $this->getApplicableForMounts($mountIds);
-		$config = $this->getConfigForMounts($mountIds);
-		$options = $this->getOptionsForMounts($mountIds);
-
-		return array_map(function ($mount, $applicable, $config, $options) {
-			$mount['type'] = (int)$mount['type'];
-			$mount['priority'] = (int)$mount['priority'];
-			$mount['applicable'] = $applicable;
-			$mount['config'] = $config;
-			$mount['options'] = $options;
-			return $mount;
-		}, $uniqueMounts, $applicable, $config, $options);
-	}
-
-	/**
-	 * Get mount options from a table grouped by mount id
-	 *
-	 * @param string $table
-	 * @param string[] $fields
-	 * @param int[] $mountIds
-	 * @return array [$mountId => [['field1' => $value1, ...], ...], ...]
-	 */
-	private function selectForMounts($table, array $fields, array $mountIds) {
-		if (count($mountIds) === 0) {
-			return [];
-		}
-		$builder = $this->connection->getQueryBuilder();
-		$fields[] = 'mount_id';
-		$placeHolders = array_map(function ($id) use ($builder) {
-			return $builder->createPositionalParameter($id, IQueryBuilder::PARAM_INT);
-		}, $mountIds);
-		$query = $builder->select($fields)
-			->from($table)
-			->where($builder->expr()->in('mount_id', $placeHolders));
-		$rows = $query->execute()->fetchAll();
-
-		$result = [];
-		foreach ($mountIds as $mountId) {
-			$result[$mountId] = [];
-		}
-		foreach ($rows as $row) {
-			if (isset($row['type'])) {
-				$row['type'] = (int)$row['type'];
-			}
-			$result[$row['mount_id']][] = $row;
-		}
-		return $result;
-	}
-
-	/**
-	 * @param int[] $mountIds
-	 * @return array [$id => [['type' => $type, 'value' => $value], ...], ...]
-	 */
-	public function getApplicableForMounts($mountIds) {
-		return $this->selectForMounts('external_applicable', ['type', 'value'], $mountIds);
-	}
-
-	/**
-	 * @param int[] $mountIds
-	 * @return array [$id => ['key1' => $value1, ...], ...]
-	 */
-	public function getConfigForMounts($mountIds) {
-		$mountConfigs = $this->selectForMounts('external_config', ['key', 'value'], $mountIds);
-		return array_map([$this, 'createKeyValueMap'], $mountConfigs);
-	}
-
-	/**
-	 * @param int[] $mountIds
-	 * @return array [$id => ['key1' => $value1, ...], ...]
-	 */
-	public function getOptionsForMounts($mountIds) {
-		$mountOptions = $this->selectForMounts('external_options', ['key', 'value'], $mountIds);
-		$optionsMap = array_map([$this, 'createKeyValueMap'], $mountOptions);
-		return array_map(function (array $options) {
-			return array_map(function ($option) {
-				return json_decode($option);
-			}, $options);
-		}, $optionsMap);
-	}
-
-	/**
-	 * @param array $keyValuePairs [['key'=>$key, 'value=>$value], ...]
-	 * @return array ['key1' => $value1, ...]
-	 */
-	private function createKeyValueMap(array $keyValuePairs) {
-		$decryptedPairts = array_map(function ($pair) {
-			if ($pair['key'] === 'password') {
-				$pair['value'] = $this->decryptValue($pair['value']);
-			}
-			return $pair;
-		}, $keyValuePairs);
-		$keys = array_map(function ($pair) {
-			return $pair['key'];
-		}, $decryptedPairts);
-		$values = array_map(function ($pair) {
-			return $pair['value'];
-		}, $decryptedPairts);
-
-		return array_combine($keys, $values);
-	}
-
-	private function encryptValue($value) {
-		return $this->crypto->encrypt($value);
-	}
-
-	private function decryptValue($value) {
-		try {
-			return $this->crypto->decrypt($value);
-		} catch (\Exception $e) {
-			return $value;
-		}
-	}
+    public const MOUNT_TYPE_ADMIN = 1;
+    public const MOUNT_TYPE_PERSONAl = 2;
+
+    public const APPLICABLE_TYPE_GLOBAL = 1;
+    public const APPLICABLE_TYPE_GROUP = 2;
+    public const APPLICABLE_TYPE_USER = 3;
+
+    /**
+     * @var IDBConnection
+     */
+    private $connection;
+
+    /**
+     * @var ICrypto
+     */
+    private $crypto;
+
+    /**
+     * DBConfigService constructor.
+     *
+     * @param IDBConnection $connection
+     * @param ICrypto $crypto
+     */
+    public function __construct(IDBConnection $connection, ICrypto $crypto) {
+        $this->connection = $connection;
+        $this->crypto = $crypto;
+    }
+
+    /**
+     * @param int $mountId
+     * @return array
+     */
+    public function getMountById($mountId) {
+        $builder = $this->connection->getQueryBuilder();
+        $query = $builder->select(['mount_id', 'mount_point', 'storage_backend', 'auth_backend', 'priority', 'type'])
+            ->from('external_mounts', 'm')
+            ->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
+        $mounts = $this->getMountsFromQuery($query);
+        if (count($mounts) > 0) {
+            return $mounts[0];
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Get all configured mounts
+     *
+     * @return array
+     */
+    public function getAllMounts() {
+        $builder = $this->connection->getQueryBuilder();
+        $query = $builder->select(['mount_id', 'mount_point', 'storage_backend', 'auth_backend', 'priority', 'type'])
+            ->from('external_mounts');
+        return $this->getMountsFromQuery($query);
+    }
+
+    public function getMountsForUser($userId, $groupIds) {
+        $builder = $this->connection->getQueryBuilder();
+        $query = $builder->select(['m.mount_id', 'mount_point', 'storage_backend', 'auth_backend', 'priority', 'm.type'])
+            ->from('external_mounts', 'm')
+            ->innerJoin('m', 'external_applicable', 'a', $builder->expr()->eq('m.mount_id', 'a.mount_id'))
+            ->where($builder->expr()->orX(
+                $builder->expr()->andX( // global mounts
+                    $builder->expr()->eq('a.type', $builder->createNamedParameter(self::APPLICABLE_TYPE_GLOBAL, IQueryBuilder::PARAM_INT)),
+                    $builder->expr()->isNull('a.value')
+                ),
+                $builder->expr()->andX( // mounts for user
+                    $builder->expr()->eq('a.type', $builder->createNamedParameter(self::APPLICABLE_TYPE_USER, IQueryBuilder::PARAM_INT)),
+                    $builder->expr()->eq('a.value', $builder->createNamedParameter($userId))
+                ),
+                $builder->expr()->andX( // mounts for group
+                    $builder->expr()->eq('a.type', $builder->createNamedParameter(self::APPLICABLE_TYPE_GROUP, IQueryBuilder::PARAM_INT)),
+                    $builder->expr()->in('a.value', $builder->createNamedParameter($groupIds, IQueryBuilder::PARAM_STR_ARRAY))
+                )
+            ));
+
+        return $this->getMountsFromQuery($query);
+    }
+
+    public function modifyMountsOnUserDelete(string $uid): void {
+        $this->modifyMountsOnDelete($uid, self::APPLICABLE_TYPE_USER);
+    }
+
+    public function modifyMountsOnGroupDelete(string $gid): void {
+        $this->modifyMountsOnDelete($gid, self::APPLICABLE_TYPE_GROUP);
+    }
+
+    protected function modifyMountsOnDelete(string $applicableId, int $applicableType): void {
+        $builder = $this->connection->getQueryBuilder();
+        $query = $builder->select(['a.mount_id', $builder->func()->count('a.mount_id', 'count')])
+            ->from('external_applicable', 'a')
+            ->leftJoin('a', 'external_applicable', 'b', $builder->expr()->eq('a.mount_id', 'b.mount_id'))
+            ->where($builder->expr()->andX(
+                $builder->expr()->eq('b.type', $builder->createNamedParameter($applicableType, IQueryBuilder::PARAM_INT)),
+                $builder->expr()->eq('b.value', $builder->createNamedParameter($applicableId))
+            )
+            )
+            ->groupBy(['a.mount_id']);
+        $stmt = $query->execute();
+        $result = $stmt->fetchAll();
+        $stmt->closeCursor();
+
+        foreach ($result as $row) {
+            if ((int)$row['count'] > 1) {
+                $this->removeApplicable($row['mount_id'], $applicableType, $applicableId);
+            } else {
+                $this->removeMount($row['mount_id']);
+            }
+        }
+    }
+
+    /**
+     * Get admin defined mounts
+     *
+     * @return array
+     */
+    public function getAdminMounts() {
+        $builder = $this->connection->getQueryBuilder();
+        $query = $builder->select(['mount_id', 'mount_point', 'storage_backend', 'auth_backend', 'priority', 'type'])
+            ->from('external_mounts')
+            ->where($builder->expr()->eq('type', $builder->expr()->literal(self::MOUNT_TYPE_ADMIN, IQueryBuilder::PARAM_INT)));
+        return $this->getMountsFromQuery($query);
+    }
+
+    protected function getForQuery(IQueryBuilder $builder, $type, $value) {
+        $query = $builder->select(['m.mount_id', 'mount_point', 'storage_backend', 'auth_backend', 'priority', 'm.type'])
+            ->from('external_mounts', 'm')
+            ->innerJoin('m', 'external_applicable', 'a', $builder->expr()->eq('m.mount_id', 'a.mount_id'))
+            ->where($builder->expr()->eq('a.type', $builder->createNamedParameter($type, IQueryBuilder::PARAM_INT)));
+
+        if (is_null($value)) {
+            $query = $query->andWhere($builder->expr()->isNull('a.value'));
+        } else {
+            $query = $query->andWhere($builder->expr()->eq('a.value', $builder->createNamedParameter($value)));
+        }
+
+        return $query;
+    }
+
+    /**
+     * Get mounts by applicable
+     *
+     * @param int $type any of the self::APPLICABLE_TYPE_ constants
+     * @param string|null $value user_id, group_id or null for global mounts
+     * @return array
+     */
+    public function getMountsFor($type, $value) {
+        $builder = $this->connection->getQueryBuilder();
+        $query = $this->getForQuery($builder, $type, $value);
+
+        return $this->getMountsFromQuery($query);
+    }
+
+    /**
+     * Get admin defined mounts by applicable
+     *
+     * @param int $type any of the self::APPLICABLE_TYPE_ constants
+     * @param string|null $value user_id, group_id or null for global mounts
+     * @return array
+     */
+    public function getAdminMountsFor($type, $value) {
+        $builder = $this->connection->getQueryBuilder();
+        $query = $this->getForQuery($builder, $type, $value);
+        $query->andWhere($builder->expr()->eq('m.type', $builder->expr()->literal(self::MOUNT_TYPE_ADMIN, IQueryBuilder::PARAM_INT)));
+
+        return $this->getMountsFromQuery($query);
+    }
+
+    /**
+     * Get admin defined mounts for multiple applicable
+     *
+     * @param int $type any of the self::APPLICABLE_TYPE_ constants
+     * @param string[] $values user_ids or group_ids
+     * @return array
+     */
+    public function getAdminMountsForMultiple($type, array $values) {
+        $builder = $this->connection->getQueryBuilder();
+        $params = array_map(function ($value) use ($builder) {
+            return $builder->createNamedParameter($value, IQueryBuilder::PARAM_STR);
+        }, $values);
+
+        $query = $builder->select(['m.mount_id', 'mount_point', 'storage_backend', 'auth_backend', 'priority', 'm.type'])
+            ->from('external_mounts', 'm')
+            ->innerJoin('m', 'external_applicable', 'a', $builder->expr()->eq('m.mount_id', 'a.mount_id'))
+            ->where($builder->expr()->eq('a.type', $builder->createNamedParameter($type, IQueryBuilder::PARAM_INT)))
+            ->andWhere($builder->expr()->in('a.value', $params));
+        $query->andWhere($builder->expr()->eq('m.type', $builder->expr()->literal(self::MOUNT_TYPE_ADMIN, IQueryBuilder::PARAM_INT)));
+
+        return $this->getMountsFromQuery($query);
+    }
+
+    /**
+     * Get user defined mounts by applicable
+     *
+     * @param int $type any of the self::APPLICABLE_TYPE_ constants
+     * @param string|null $value user_id, group_id or null for global mounts
+     * @return array
+     */
+    public function getUserMountsFor($type, $value) {
+        $builder = $this->connection->getQueryBuilder();
+        $query = $this->getForQuery($builder, $type, $value);
+        $query->andWhere($builder->expr()->eq('m.type', $builder->expr()->literal(self::MOUNT_TYPE_PERSONAl, IQueryBuilder::PARAM_INT)));
+
+        return $this->getMountsFromQuery($query);
+    }
+
+    /**
+     * Add a mount to the database
+     *
+     * @param string $mountPoint
+     * @param string $storageBackend
+     * @param string $authBackend
+     * @param int $priority
+     * @param int $type self::MOUNT_TYPE_ADMIN or self::MOUNT_TYPE_PERSONAL
+     * @return int the id of the new mount
+     */
+    public function addMount($mountPoint, $storageBackend, $authBackend, $priority, $type) {
+        if (!$priority) {
+            $priority = 100;
+        }
+        $builder = $this->connection->getQueryBuilder();
+        $query = $builder->insert('external_mounts')
+            ->values([
+                'mount_point' => $builder->createNamedParameter($mountPoint, IQueryBuilder::PARAM_STR),
+                'storage_backend' => $builder->createNamedParameter($storageBackend, IQueryBuilder::PARAM_STR),
+                'auth_backend' => $builder->createNamedParameter($authBackend, IQueryBuilder::PARAM_STR),
+                'priority' => $builder->createNamedParameter($priority, IQueryBuilder::PARAM_INT),
+                'type' => $builder->createNamedParameter($type, IQueryBuilder::PARAM_INT)
+            ]);
+        $query->execute();
+        return (int)$this->connection->lastInsertId('*PREFIX*external_mounts');
+    }
+
+    /**
+     * Remove a mount from the database
+     *
+     * @param int $mountId
+     */
+    public function removeMount($mountId) {
+        $builder = $this->connection->getQueryBuilder();
+        $query = $builder->delete('external_mounts')
+            ->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
+        $query->execute();
+
+        $query = $builder->delete('external_applicable')
+            ->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
+        $query->execute();
+
+        $query = $builder->delete('external_config')
+            ->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
+        $query->execute();
+
+        $query = $builder->delete('external_options')
+            ->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
+        $query->execute();
+    }
+
+    /**
+     * @param int $mountId
+     * @param string $newMountPoint
+     */
+    public function setMountPoint($mountId, $newMountPoint) {
+        $builder = $this->connection->getQueryBuilder();
+
+        $query = $builder->update('external_mounts')
+            ->set('mount_point', $builder->createNamedParameter($newMountPoint))
+            ->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
+
+        $query->execute();
+    }
+
+    /**
+     * @param int $mountId
+     * @param string $newAuthBackend
+     */
+    public function setAuthBackend($mountId, $newAuthBackend) {
+        $builder = $this->connection->getQueryBuilder();
+
+        $query = $builder->update('external_mounts')
+            ->set('auth_backend', $builder->createNamedParameter($newAuthBackend))
+            ->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)));
+
+        $query->execute();
+    }
+
+    /**
+     * @param int $mountId
+     * @param string $key
+     * @param string $value
+     */
+    public function setConfig($mountId, $key, $value) {
+        if ($key === 'password') {
+            $value = $this->encryptValue($value);
+        }
+
+        try {
+            $builder = $this->connection->getQueryBuilder();
+            $builder->insert('external_config')
+                ->setValue('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT))
+                ->setValue('key', $builder->createNamedParameter($key, IQueryBuilder::PARAM_STR))
+                ->setValue('value', $builder->createNamedParameter($value, IQueryBuilder::PARAM_STR))
+                ->execute();
+        } catch (UniqueConstraintViolationException $e) {
+            $builder = $this->connection->getQueryBuilder();
+            $query = $builder->update('external_config')
+                ->set('value', $builder->createNamedParameter($value, IQueryBuilder::PARAM_STR))
+                ->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)))
+                ->andWhere($builder->expr()->eq('key', $builder->createNamedParameter($key, IQueryBuilder::PARAM_STR)));
+            $query->execute();
+        }
+    }
+
+    /**
+     * @param int $mountId
+     * @param string $key
+     * @param string $value
+     */
+    public function setOption($mountId, $key, $value) {
+        try {
+            $builder = $this->connection->getQueryBuilder();
+            $builder->insert('external_options')
+                ->setValue('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT))
+                ->setValue('key', $builder->createNamedParameter($key, IQueryBuilder::PARAM_STR))
+                ->setValue('value', $builder->createNamedParameter(json_encode($value), IQueryBuilder::PARAM_STR))
+                ->execute();
+        } catch (UniqueConstraintViolationException $e) {
+            $builder = $this->connection->getQueryBuilder();
+            $query = $builder->update('external_options')
+                ->set('value', $builder->createNamedParameter(json_encode($value), IQueryBuilder::PARAM_STR))
+                ->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)))
+                ->andWhere($builder->expr()->eq('key', $builder->createNamedParameter($key, IQueryBuilder::PARAM_STR)));
+            $query->execute();
+        }
+    }
+
+    public function addApplicable($mountId, $type, $value) {
+        try {
+            $builder = $this->connection->getQueryBuilder();
+            $builder->insert('external_applicable')
+                ->setValue('mount_id', $builder->createNamedParameter($mountId))
+                ->setValue('type', $builder->createNamedParameter($type))
+                ->setValue('value', $builder->createNamedParameter($value))
+                ->execute();
+        } catch (UniqueConstraintViolationException $e) {
+            // applicable exists already
+        }
+    }
+
+    public function removeApplicable($mountId, $type, $value) {
+        $builder = $this->connection->getQueryBuilder();
+        $query = $builder->delete('external_applicable')
+            ->where($builder->expr()->eq('mount_id', $builder->createNamedParameter($mountId, IQueryBuilder::PARAM_INT)))
+            ->andWhere($builder->expr()->eq('type', $builder->createNamedParameter($type, IQueryBuilder::PARAM_INT)));
+
+        if (is_null($value)) {
+            $query = $query->andWhere($builder->expr()->isNull('value'));
+        } else {
+            $query = $query->andWhere($builder->expr()->eq('value', $builder->createNamedParameter($value, IQueryBuilder::PARAM_STR)));
+        }
+
+        $query->execute();
+    }
+
+    private function getMountsFromQuery(IQueryBuilder $query) {
+        $result = $query->execute();
+        $mounts = $result->fetchAll();
+        $uniqueMounts = [];
+        foreach ($mounts as $mount) {
+            $id = $mount['mount_id'];
+            if (!isset($uniqueMounts[$id])) {
+                $uniqueMounts[$id] = $mount;
+            }
+        }
+        $uniqueMounts = array_values($uniqueMounts);
+
+        $mountIds = array_map(function ($mount) {
+            return $mount['mount_id'];
+        }, $uniqueMounts);
+        $mountIds = array_values(array_unique($mountIds));
+
+        $applicable = $this->getApplicableForMounts($mountIds);
+        $config = $this->getConfigForMounts($mountIds);
+        $options = $this->getOptionsForMounts($mountIds);
+
+        return array_map(function ($mount, $applicable, $config, $options) {
+            $mount['type'] = (int)$mount['type'];
+            $mount['priority'] = (int)$mount['priority'];
+            $mount['applicable'] = $applicable;
+            $mount['config'] = $config;
+            $mount['options'] = $options;
+            return $mount;
+        }, $uniqueMounts, $applicable, $config, $options);
+    }
+
+    /**
+     * Get mount options from a table grouped by mount id
+     *
+     * @param string $table
+     * @param string[] $fields
+     * @param int[] $mountIds
+     * @return array [$mountId => [['field1' => $value1, ...], ...], ...]
+     */
+    private function selectForMounts($table, array $fields, array $mountIds) {
+        if (count($mountIds) === 0) {
+            return [];
+        }
+        $builder = $this->connection->getQueryBuilder();
+        $fields[] = 'mount_id';
+        $placeHolders = array_map(function ($id) use ($builder) {
+            return $builder->createPositionalParameter($id, IQueryBuilder::PARAM_INT);
+        }, $mountIds);
+        $query = $builder->select($fields)
+            ->from($table)
+            ->where($builder->expr()->in('mount_id', $placeHolders));
+        $rows = $query->execute()->fetchAll();
+
+        $result = [];
+        foreach ($mountIds as $mountId) {
+            $result[$mountId] = [];
+        }
+        foreach ($rows as $row) {
+            if (isset($row['type'])) {
+                $row['type'] = (int)$row['type'];
+            }
+            $result[$row['mount_id']][] = $row;
+        }
+        return $result;
+    }
+
+    /**
+     * @param int[] $mountIds
+     * @return array [$id => [['type' => $type, 'value' => $value], ...], ...]
+     */
+    public function getApplicableForMounts($mountIds) {
+        return $this->selectForMounts('external_applicable', ['type', 'value'], $mountIds);
+    }
+
+    /**
+     * @param int[] $mountIds
+     * @return array [$id => ['key1' => $value1, ...], ...]
+     */
+    public function getConfigForMounts($mountIds) {
+        $mountConfigs = $this->selectForMounts('external_config', ['key', 'value'], $mountIds);
+        return array_map([$this, 'createKeyValueMap'], $mountConfigs);
+    }
+
+    /**
+     * @param int[] $mountIds
+     * @return array [$id => ['key1' => $value1, ...], ...]
+     */
+    public function getOptionsForMounts($mountIds) {
+        $mountOptions = $this->selectForMounts('external_options', ['key', 'value'], $mountIds);
+        $optionsMap = array_map([$this, 'createKeyValueMap'], $mountOptions);
+        return array_map(function (array $options) {
+            return array_map(function ($option) {
+                return json_decode($option);
+            }, $options);
+        }, $optionsMap);
+    }
+
+    /**
+     * @param array $keyValuePairs [['key'=>$key, 'value=>$value], ...]
+     * @return array ['key1' => $value1, ...]
+     */
+    private function createKeyValueMap(array $keyValuePairs) {
+        $decryptedPairts = array_map(function ($pair) {
+            if ($pair['key'] === 'password') {
+                $pair['value'] = $this->decryptValue($pair['value']);
+            }
+            return $pair;
+        }, $keyValuePairs);
+        $keys = array_map(function ($pair) {
+            return $pair['key'];
+        }, $decryptedPairts);
+        $values = array_map(function ($pair) {
+            return $pair['value'];
+        }, $decryptedPairts);
+
+        return array_combine($keys, $values);
+    }
+
+    private function encryptValue($value) {
+        return $this->crypto->encrypt($value);
+    }
+
+    private function decryptValue($value) {
+        try {
+            return $this->crypto->decrypt($value);
+        } catch (\Exception $e) {
+            return $value;
+        }
+    }
 }

apps/dav/lib/CardDAV/CardDavBackend.php

Indentation +1299 added lines, -1299 removed lines

@@ -62,1303 +62,1303 @@
 use Symfony\Component\EventDispatcher\GenericEvent;
 
 class CardDavBackend implements BackendInterface, SyncSupport {
-	public const PERSONAL_ADDRESSBOOK_URI = 'contacts';
-	public const PERSONAL_ADDRESSBOOK_NAME = 'Contacts';
-
-	/** @var Principal */
-	private $principalBackend;
-
-	/** @var string */
-	private $dbCardsTable = 'cards';
-
-	/** @var string */
-	private $dbCardsPropertiesTable = 'cards_properties';
-
-	/** @var IDBConnection */
-	private $db;
-
-	/** @var Backend */
-	private $sharingBackend;
-
-	/** @var array properties to index */
-	public static $indexProperties = [
-		'BDAY', 'UID', 'N', 'FN', 'TITLE', 'ROLE', 'NOTE', 'NICKNAME',
-		'ORG', 'CATEGORIES', 'EMAIL', 'TEL', 'IMPP', 'ADR', 'URL', 'GEO', 'CLOUD'];
-
-	/**
-	 * @var string[] Map of uid => display name
-	 */
-	protected $userDisplayNames;
-
-	/** @var IUserManager */
-	private $userManager;
-
-	/** @var IEventDispatcher */
-	private $dispatcher;
-
-	/** @var EventDispatcherInterface */
-	private $legacyDispatcher;
-
-	private $etagCache = [];
-
-	/**
-	 * CardDavBackend constructor.
-	 *
-	 * @param IDBConnection $db
-	 * @param Principal $principalBackend
-	 * @param IUserManager $userManager
-	 * @param IGroupManager $groupManager
-	 * @param IEventDispatcher $dispatcher
-	 * @param EventDispatcherInterface $legacyDispatcher
-	 */
-	public function __construct(IDBConnection $db,
-								Principal $principalBackend,
-								IUserManager $userManager,
-								IGroupManager $groupManager,
-								IEventDispatcher $dispatcher,
-								EventDispatcherInterface $legacyDispatcher) {
-		$this->db = $db;
-		$this->principalBackend = $principalBackend;
-		$this->userManager = $userManager;
-		$this->dispatcher = $dispatcher;
-		$this->legacyDispatcher = $legacyDispatcher;
-		$this->sharingBackend = new Backend($this->db, $this->userManager, $groupManager, $principalBackend, 'addressbook');
-	}
-
-	/**
-	 * Return the number of address books for a principal
-	 *
-	 * @param $principalUri
-	 * @return int
-	 */
-	public function getAddressBooksForUserCount($principalUri) {
-		$principalUri = $this->convertPrincipal($principalUri, true);
-		$query = $this->db->getQueryBuilder();
-		$query->select($query->func()->count('*'))
-			->from('addressbooks')
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)));
-
-		return (int)$query->execute()->fetchColumn();
-	}
-
-	/**
-	 * Returns the list of address books for a specific user.
-	 *
-	 * Every addressbook should have the following properties:
-	 *   id - an arbitrary unique id
-	 *   uri - the 'basename' part of the url
-	 *   principaluri - Same as the passed parameter
-	 *
-	 * Any additional clark-notation property may be passed besides this. Some
-	 * common ones are :
-	 *   {DAV:}displayname
-	 *   {urn:ietf:params:xml:ns:carddav}addressbook-description
-	 *   {http://calendarserver.org/ns/}getctag
-	 *
-	 * @param string $principalUri
-	 * @return array
-	 */
-	public function getAddressBooksForUser($principalUri) {
-		$principalUriOriginal = $principalUri;
-		$principalUri = $this->convertPrincipal($principalUri, true);
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
-			->from('addressbooks')
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)));
-
-		$addressBooks = [];
-
-		$result = $query->execute();
-		while ($row = $result->fetch()) {
-			$addressBooks[$row['id']] = [
-				'id' => $row['id'],
-				'uri' => $row['uri'],
-				'principaluri' => $this->convertPrincipal($row['principaluri'], false),
-				'{DAV:}displayname' => $row['displayname'],
-				'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
-				'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
-			];
-
-			$this->addOwnerPrincipal($addressBooks[$row['id']]);
-		}
-		$result->closeCursor();
-
-		// query for shared addressbooks
-		$principals = $this->principalBackend->getGroupMembership($principalUriOriginal, true);
-		$principals = array_merge($principals, $this->principalBackend->getCircleMembership($principalUriOriginal));
-
-		$principals = array_map(function ($principal) {
-			return urldecode($principal);
-		}, $principals);
-		$principals[] = $principalUri;
-
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select(['a.id', 'a.uri', 'a.displayname', 'a.principaluri', 'a.description', 'a.synctoken', 's.access'])
-			->from('dav_shares', 's')
-			->join('s', 'addressbooks', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
-			->where($query->expr()->in('s.principaluri', $query->createParameter('principaluri')))
-			->andWhere($query->expr()->eq('s.type', $query->createParameter('type')))
-			->setParameter('type', 'addressbook')
-			->setParameter('principaluri', $principals, IQueryBuilder::PARAM_STR_ARRAY)
-			->execute();
-
-		$readOnlyPropertyName = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only';
-		while ($row = $result->fetch()) {
-			if ($row['principaluri'] === $principalUri) {
-				continue;
-			}
-
-			$readOnly = (int)$row['access'] === Backend::ACCESS_READ;
-			if (isset($addressBooks[$row['id']])) {
-				if ($readOnly) {
-					// New share can not have more permissions then the old one.
-					continue;
-				}
-				if (isset($addressBooks[$row['id']][$readOnlyPropertyName]) &&
-					$addressBooks[$row['id']][$readOnlyPropertyName] === 0) {
-					// Old share is already read-write, no more permissions can be gained
-					continue;
-				}
-			}
-
-			list(, $name) = \Sabre\Uri\split($row['principaluri']);
-			$uri = $row['uri'] . '_shared_by_' . $name;
-			$displayName = $row['displayname'] . ' (' . $this->getUserDisplayName($name) . ')';
-
-			$addressBooks[$row['id']] = [
-				'id' => $row['id'],
-				'uri' => $uri,
-				'principaluri' => $principalUriOriginal,
-				'{DAV:}displayname' => $displayName,
-				'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
-				'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $row['principaluri'],
-				$readOnlyPropertyName => $readOnly,
-			];
-
-			$this->addOwnerPrincipal($addressBooks[$row['id']]);
-		}
-		$result->closeCursor();
-
-		return array_values($addressBooks);
-	}
-
-	public function getUsersOwnAddressBooks($principalUri) {
-		$principalUri = $this->convertPrincipal($principalUri, true);
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
-			->from('addressbooks')
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)));
-
-		$addressBooks = [];
-
-		$result = $query->execute();
-		while ($row = $result->fetch()) {
-			$addressBooks[$row['id']] = [
-				'id' => $row['id'],
-				'uri' => $row['uri'],
-				'principaluri' => $this->convertPrincipal($row['principaluri'], false),
-				'{DAV:}displayname' => $row['displayname'],
-				'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
-				'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
-			];
-
-			$this->addOwnerPrincipal($addressBooks[$row['id']]);
-		}
-		$result->closeCursor();
-
-		return array_values($addressBooks);
-	}
-
-	private function getUserDisplayName($uid) {
-		if (!isset($this->userDisplayNames[$uid])) {
-			$user = $this->userManager->get($uid);
-
-			if ($user instanceof IUser) {
-				$this->userDisplayNames[$uid] = $user->getDisplayName();
-			} else {
-				$this->userDisplayNames[$uid] = $uid;
-			}
-		}
-
-		return $this->userDisplayNames[$uid];
-	}
-
-	/**
-	 * @param int $addressBookId
-	 */
-	public function getAddressBookById($addressBookId) {
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
-			->from('addressbooks')
-			->where($query->expr()->eq('id', $query->createNamedParameter($addressBookId)))
-			->execute();
-
-		$row = $result->fetch();
-		$result->closeCursor();
-		if ($row === false) {
-			return null;
-		}
-
-		$addressBook = [
-			'id' => $row['id'],
-			'uri' => $row['uri'],
-			'principaluri' => $row['principaluri'],
-			'{DAV:}displayname' => $row['displayname'],
-			'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
-			'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
-		];
-
-		$this->addOwnerPrincipal($addressBook);
-
-		return $addressBook;
-	}
-
-	/**
-	 * @param $addressBookUri
-	 * @return array|null
-	 */
-	public function getAddressBooksByUri($principal, $addressBookUri) {
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
-			->from('addressbooks')
-			->where($query->expr()->eq('uri', $query->createNamedParameter($addressBookUri)))
-			->andWhere($query->expr()->eq('principaluri', $query->createNamedParameter($principal)))
-			->setMaxResults(1)
-			->execute();
-
-		$row = $result->fetch();
-		$result->closeCursor();
-		if ($row === false) {
-			return null;
-		}
-
-		$addressBook = [
-			'id' => $row['id'],
-			'uri' => $row['uri'],
-			'principaluri' => $row['principaluri'],
-			'{DAV:}displayname' => $row['displayname'],
-			'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
-			'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
-		];
-
-		$this->addOwnerPrincipal($addressBook);
-
-		return $addressBook;
-	}
-
-	/**
-	 * Updates properties for an address book.
-	 *
-	 * The list of mutations is stored in a Sabre\DAV\PropPatch object.
-	 * To do the actual updates, you must tell this object which properties
-	 * you're going to process with the handle() method.
-	 *
-	 * Calling the handle method is like telling the PropPatch object "I
-	 * promise I can handle updating this property".
-	 *
-	 * Read the PropPatch documentation for more info and examples.
-	 *
-	 * @param string $addressBookId
-	 * @param \Sabre\DAV\PropPatch $propPatch
-	 * @return void
-	 */
-	public function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch) {
-		$supportedProperties = [
-			'{DAV:}displayname',
-			'{' . Plugin::NS_CARDDAV . '}addressbook-description',
-		];
-
-		$propPatch->handle($supportedProperties, function ($mutations) use ($addressBookId) {
-			$updates = [];
-			foreach ($mutations as $property => $newValue) {
-				switch ($property) {
-					case '{DAV:}displayname':
-						$updates['displayname'] = $newValue;
-						break;
-					case '{' . Plugin::NS_CARDDAV . '}addressbook-description':
-						$updates['description'] = $newValue;
-						break;
-				}
-			}
-			$query = $this->db->getQueryBuilder();
-			$query->update('addressbooks');
-
-			foreach ($updates as $key => $value) {
-				$query->set($key, $query->createNamedParameter($value));
-			}
-			$query->where($query->expr()->eq('id', $query->createNamedParameter($addressBookId)))
-				->execute();
-
-			$this->addChange($addressBookId, "", 2);
-
-			$addressBookRow = $this->getAddressBookById((int)$addressBookId);
-			$shares = $this->getShares($addressBookId);
-			$this->dispatcher->dispatchTyped(new AddressBookUpdatedEvent((int)$addressBookId, $addressBookRow, $shares, $mutations));
-
-			return true;
-		});
-	}
-
-	/**
-	 * Creates a new address book
-	 *
-	 * @param string $principalUri
-	 * @param string $url Just the 'basename' of the url.
-	 * @param array $properties
-	 * @return int
-	 * @throws BadRequest
-	 */
-	public function createAddressBook($principalUri, $url, array $properties) {
-		$values = [
-			'displayname' => null,
-			'description' => null,
-			'principaluri' => $principalUri,
-			'uri' => $url,
-			'synctoken' => 1
-		];
-
-		foreach ($properties as $property => $newValue) {
-			switch ($property) {
-				case '{DAV:}displayname':
-					$values['displayname'] = $newValue;
-					break;
-				case '{' . Plugin::NS_CARDDAV . '}addressbook-description':
-					$values['description'] = $newValue;
-					break;
-				default:
-					throw new BadRequest('Unknown property: ' . $property);
-			}
-		}
-
-		// Fallback to make sure the displayname is set. Some clients may refuse
-		// to work with addressbooks not having a displayname.
-		if (is_null($values['displayname'])) {
-			$values['displayname'] = $url;
-		}
-
-		$query = $this->db->getQueryBuilder();
-		$query->insert('addressbooks')
-			->values([
-				'uri' => $query->createParameter('uri'),
-				'displayname' => $query->createParameter('displayname'),
-				'description' => $query->createParameter('description'),
-				'principaluri' => $query->createParameter('principaluri'),
-				'synctoken' => $query->createParameter('synctoken'),
-			])
-			->setParameters($values)
-			->execute();
-
-		$addressBookId = $query->getLastInsertId();
-		$addressBookRow = $this->getAddressBookById($addressBookId);
-		$this->dispatcher->dispatchTyped(new AddressBookCreatedEvent((int)$addressBookId, $addressBookRow));
-
-		return $addressBookId;
-	}
-
-	/**
-	 * Deletes an entire addressbook and all its contents
-	 *
-	 * @param mixed $addressBookId
-	 * @return void
-	 */
-	public function deleteAddressBook($addressBookId) {
-		$addressBookData = $this->getAddressBookById($addressBookId);
-		$shares = $this->getShares($addressBookId);
-
-		$query = $this->db->getQueryBuilder();
-		$query->delete($this->dbCardsTable)
-			->where($query->expr()->eq('addressbookid', $query->createParameter('addressbookid')))
-			->setParameter('addressbookid', $addressBookId)
-			->execute();
-
-		$query->delete('addressbookchanges')
-			->where($query->expr()->eq('addressbookid', $query->createParameter('addressbookid')))
-			->setParameter('addressbookid', $addressBookId)
-			->execute();
-
-		$query->delete('addressbooks')
-			->where($query->expr()->eq('id', $query->createParameter('id')))
-			->setParameter('id', $addressBookId)
-			->execute();
-
-		$this->sharingBackend->deleteAllShares($addressBookId);
-
-		$query->delete($this->dbCardsPropertiesTable)
-			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
-			->execute();
-
-		if ($addressBookData) {
-			$this->dispatcher->dispatchTyped(new AddressBookDeletedEvent((int) $addressBookId, $addressBookData, $shares));
-		}
-	}
-
-	/**
-	 * Returns all cards for a specific addressbook id.
-	 *
-	 * This method should return the following properties for each card:
-	 *   * carddata - raw vcard data
-	 *   * uri - Some unique url
-	 *   * lastmodified - A unix timestamp
-	 *
-	 * It's recommended to also return the following properties:
-	 *   * etag - A unique etag. This must change every time the card changes.
-	 *   * size - The size of the card in bytes.
-	 *
-	 * If these last two properties are provided, less time will be spent
-	 * calculating them. If they are specified, you can also ommit carddata.
-	 * This may speed up certain requests, especially with large cards.
-	 *
-	 * @param mixed $addressBookId
-	 * @return array
-	 */
-	public function getCards($addressBookId) {
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'lastmodified', 'etag', 'size', 'carddata', 'uid'])
-			->from($this->dbCardsTable)
-			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
-
-		$cards = [];
-
-		$result = $query->execute();
-		while ($row = $result->fetch()) {
-			$row['etag'] = '"' . $row['etag'] . '"';
-
-			$modified = false;
-			$row['carddata'] = $this->readBlob($row['carddata'], $modified);
-			if ($modified) {
-				$row['size'] = strlen($row['carddata']);
-			}
-
-			$cards[] = $row;
-		}
-		$result->closeCursor();
-
-		return $cards;
-	}
-
-	/**
-	 * Returns a specific card.
-	 *
-	 * The same set of properties must be returned as with getCards. The only
-	 * exception is that 'carddata' is absolutely required.
-	 *
-	 * If the card does not exist, you must return false.
-	 *
-	 * @param mixed $addressBookId
-	 * @param string $cardUri
-	 * @return array
-	 */
-	public function getCard($addressBookId, $cardUri) {
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'lastmodified', 'etag', 'size', 'carddata', 'uid'])
-			->from($this->dbCardsTable)
-			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
-			->andWhere($query->expr()->eq('uri', $query->createNamedParameter($cardUri)))
-			->setMaxResults(1);
-
-		$result = $query->execute();
-		$row = $result->fetch();
-		if (!$row) {
-			return false;
-		}
-		$row['etag'] = '"' . $row['etag'] . '"';
-
-		$modified = false;
-		$row['carddata'] = $this->readBlob($row['carddata'], $modified);
-		if ($modified) {
-			$row['size'] = strlen($row['carddata']);
-		}
-
-		return $row;
-	}
-
-	/**
-	 * Returns a list of cards.
-	 *
-	 * This method should work identical to getCard, but instead return all the
-	 * cards in the list as an array.
-	 *
-	 * If the backend supports this, it may allow for some speed-ups.
-	 *
-	 * @param mixed $addressBookId
-	 * @param string[] $uris
-	 * @return array
-	 */
-	public function getMultipleCards($addressBookId, array $uris) {
-		if (empty($uris)) {
-			return [];
-		}
-
-		$chunks = array_chunk($uris, 100);
-		$cards = [];
-
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'lastmodified', 'etag', 'size', 'carddata', 'uid'])
-			->from($this->dbCardsTable)
-			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
-			->andWhere($query->expr()->in('uri', $query->createParameter('uri')));
-
-		foreach ($chunks as $uris) {
-			$query->setParameter('uri', $uris, IQueryBuilder::PARAM_STR_ARRAY);
-			$result = $query->execute();
-
-			while ($row = $result->fetch()) {
-				$row['etag'] = '"' . $row['etag'] . '"';
-
-				$modified = false;
-				$row['carddata'] = $this->readBlob($row['carddata'], $modified);
-				if ($modified) {
-					$row['size'] = strlen($row['carddata']);
-				}
-
-				$cards[] = $row;
-			}
-			$result->closeCursor();
-		}
-		return $cards;
-	}
-
-	/**
-	 * Creates a new card.
-	 *
-	 * The addressbook id will be passed as the first argument. This is the
-	 * same id as it is returned from the getAddressBooksForUser method.
-	 *
-	 * The cardUri is a base uri, and doesn't include the full path. The
-	 * cardData argument is the vcard body, and is passed as a string.
-	 *
-	 * It is possible to return an ETag from this method. This ETag is for the
-	 * newly created resource, and must be enclosed with double quotes (that
-	 * is, the string itself must contain the double quotes).
-	 *
-	 * You should only return the ETag if you store the carddata as-is. If a
-	 * subsequent GET request on the same card does not have the same body,
-	 * byte-by-byte and you did return an ETag here, clients tend to get
-	 * confused.
-	 *
-	 * If you don't return an ETag, you can just return null.
-	 *
-	 * @param mixed $addressBookId
-	 * @param string $cardUri
-	 * @param string $cardData
-	 * @return string
-	 */
-	public function createCard($addressBookId, $cardUri, $cardData) {
-		$etag = md5($cardData);
-		$uid = $this->getUID($cardData);
-
-		$q = $this->db->getQueryBuilder();
-		$q->select('uid')
-			->from($this->dbCardsTable)
-			->where($q->expr()->eq('addressbookid', $q->createNamedParameter($addressBookId)))
-			->andWhere($q->expr()->eq('uid', $q->createNamedParameter($uid)))
-			->setMaxResults(1);
-		$result = $q->execute();
-		$count = (bool)$result->fetchColumn();
-		$result->closeCursor();
-		if ($count) {
-			throw new \Sabre\DAV\Exception\BadRequest('VCard object with uid already exists in this addressbook collection.');
-		}
-
-		$query = $this->db->getQueryBuilder();
-		$query->insert('cards')
-			->values([
-				'carddata' => $query->createNamedParameter($cardData, IQueryBuilder::PARAM_LOB),
-				'uri' => $query->createNamedParameter($cardUri),
-				'lastmodified' => $query->createNamedParameter(time()),
-				'addressbookid' => $query->createNamedParameter($addressBookId),
-				'size' => $query->createNamedParameter(strlen($cardData)),
-				'etag' => $query->createNamedParameter($etag),
-				'uid' => $query->createNamedParameter($uid),
-			])
-			->execute();
-
-		$etagCacheKey = "$addressBookId#$cardUri";
-		$this->etagCache[$etagCacheKey] = $etag;
-
-		$this->addChange($addressBookId, $cardUri, 1);
-		$this->updateProperties($addressBookId, $cardUri, $cardData);
-
-		$addressBookData = $this->getAddressBookById($addressBookId);
-		$shares = $this->getShares($addressBookId);
-		$objectRow = $this->getCard($addressBookId, $cardUri);
-		$this->dispatcher->dispatchTyped(new CardCreatedEvent((int)$addressBookId, $addressBookData, $shares, $objectRow));
-		$this->legacyDispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::createCard',
-			new GenericEvent(null, [
-				'addressBookId' => $addressBookId,
-				'cardUri' => $cardUri,
-				'cardData' => $cardData]));
-
-		return '"' . $etag . '"';
-	}
-
-	/**
-	 * Updates a card.
-	 *
-	 * The addressbook id will be passed as the first argument. This is the
-	 * same id as it is returned from the getAddressBooksForUser method.
-	 *
-	 * The cardUri is a base uri, and doesn't include the full path. The
-	 * cardData argument is the vcard body, and is passed as a string.
-	 *
-	 * It is possible to return an ETag from this method. This ETag should
-	 * match that of the updated resource, and must be enclosed with double
-	 * quotes (that is: the string itself must contain the actual quotes).
-	 *
-	 * You should only return the ETag if you store the carddata as-is. If a
-	 * subsequent GET request on the same card does not have the same body,
-	 * byte-by-byte and you did return an ETag here, clients tend to get
-	 * confused.
-	 *
-	 * If you don't return an ETag, you can just return null.
-	 *
-	 * @param mixed $addressBookId
-	 * @param string $cardUri
-	 * @param string $cardData
-	 * @return string
-	 */
-	public function updateCard($addressBookId, $cardUri, $cardData) {
-		$uid = $this->getUID($cardData);
-		$etag = md5($cardData);
-		$query = $this->db->getQueryBuilder();
-
-		// check for recently stored etag and stop if it is the same
-		$etagCacheKey = "$addressBookId#$cardUri";
-		if (isset($this->etagCache[$etagCacheKey]) && $this->etagCache[$etagCacheKey] === $etag) {
-			return '"' . $etag . '"';
-		}
-
-		$query->update($this->dbCardsTable)
-			->set('carddata', $query->createNamedParameter($cardData, IQueryBuilder::PARAM_LOB))
-			->set('lastmodified', $query->createNamedParameter(time()))
-			->set('size', $query->createNamedParameter(strlen($cardData)))
-			->set('etag', $query->createNamedParameter($etag))
-			->set('uid', $query->createNamedParameter($uid))
-			->where($query->expr()->eq('uri', $query->createNamedParameter($cardUri)))
-			->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
-			->execute();
-
-		$this->etagCache[$etagCacheKey] = $etag;
-
-		$this->addChange($addressBookId, $cardUri, 2);
-		$this->updateProperties($addressBookId, $cardUri, $cardData);
-
-		$addressBookData = $this->getAddressBookById($addressBookId);
-		$shares = $this->getShares($addressBookId);
-		$objectRow = $this->getCard($addressBookId, $cardUri);
-		$this->dispatcher->dispatchTyped(new CardUpdatedEvent((int)$addressBookId, $addressBookData, $shares, $objectRow));
-		$this->legacyDispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::updateCard',
-			new GenericEvent(null, [
-				'addressBookId' => $addressBookId,
-				'cardUri' => $cardUri,
-				'cardData' => $cardData]));
-
-		return '"' . $etag . '"';
-	}
-
-	/**
-	 * Deletes a card
-	 *
-	 * @param mixed $addressBookId
-	 * @param string $cardUri
-	 * @return bool
-	 */
-	public function deleteCard($addressBookId, $cardUri) {
-		$addressBookData = $this->getAddressBookById($addressBookId);
-		$shares = $this->getShares($addressBookId);
-		$objectRow = $this->getCard($addressBookId, $cardUri);
-
-		try {
-			$cardId = $this->getCardId($addressBookId, $cardUri);
-		} catch (\InvalidArgumentException $e) {
-			$cardId = null;
-		}
-		$query = $this->db->getQueryBuilder();
-		$ret = $query->delete($this->dbCardsTable)
-			->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
-			->andWhere($query->expr()->eq('uri', $query->createNamedParameter($cardUri)))
-			->execute();
-
-		$this->addChange($addressBookId, $cardUri, 3);
-
-		if ($ret === 1) {
-			if ($cardId !== null) {
-				$this->dispatcher->dispatchTyped(new CardDeletedEvent((int)$addressBookId, $addressBookData, $shares, $objectRow));
-				$this->legacyDispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::deleteCard',
-					new GenericEvent(null, [
-						'addressBookId' => $addressBookId,
-						'cardUri' => $cardUri]));
-
-				$this->purgeProperties($addressBookId, $cardId);
-			}
-			return true;
-		}
-
-		return false;
-	}
-
-	/**
-	 * The getChanges method returns all the changes that have happened, since
-	 * the specified syncToken in the specified address book.
-	 *
-	 * This function should return an array, such as the following:
-	 *
-	 * [
-	 *   'syncToken' => 'The current synctoken',
-	 *   'added'   => [
-	 *      'new.txt',
-	 *   ],
-	 *   'modified'   => [
-	 *      'modified.txt',
-	 *   ],
-	 *   'deleted' => [
-	 *      'foo.php.bak',
-	 *      'old.txt'
-	 *   ]
-	 * ];
-	 *
-	 * The returned syncToken property should reflect the *current* syncToken
-	 * of the calendar, as reported in the {http://sabredav.org/ns}sync-token
-	 * property. This is needed here too, to ensure the operation is atomic.
-	 *
-	 * If the $syncToken argument is specified as null, this is an initial
-	 * sync, and all members should be reported.
-	 *
-	 * The modified property is an array of nodenames that have changed since
-	 * the last token.
-	 *
-	 * The deleted property is an array with nodenames, that have been deleted
-	 * from collection.
-	 *
-	 * The $syncLevel argument is basically the 'depth' of the report. If it's
-	 * 1, you only have to report changes that happened only directly in
-	 * immediate descendants. If it's 2, it should also include changes from
-	 * the nodes below the child collections. (grandchildren)
-	 *
-	 * The $limit argument allows a client to specify how many results should
-	 * be returned at most. If the limit is not specified, it should be treated
-	 * as infinite.
-	 *
-	 * If the limit (infinite or not) is higher than you're willing to return,
-	 * you should throw a Sabre\DAV\Exception\TooMuchMatches() exception.
-	 *
-	 * If the syncToken is expired (due to data cleanup) or unknown, you must
-	 * return null.
-	 *
-	 * The limit is 'suggestive'. You are free to ignore it.
-	 *
-	 * @param string $addressBookId
-	 * @param string $syncToken
-	 * @param int $syncLevel
-	 * @param int $limit
-	 * @return array
-	 */
-	public function getChangesForAddressBook($addressBookId, $syncToken, $syncLevel, $limit = null) {
-		// Current synctoken
-		$stmt = $this->db->prepare('SELECT `synctoken` FROM `*PREFIX*addressbooks` WHERE `id` = ?');
-		$stmt->execute([$addressBookId]);
-		$currentToken = $stmt->fetchColumn(0);
-
-		if (is_null($currentToken)) {
-			return null;
-		}
-
-		$result = [
-			'syncToken' => $currentToken,
-			'added' => [],
-			'modified' => [],
-			'deleted' => [],
-		];
-
-		if ($syncToken) {
-			$query = "SELECT `uri`, `operation` FROM `*PREFIX*addressbookchanges` WHERE `synctoken` >= ? AND `synctoken` < ? AND `addressbookid` = ? ORDER BY `synctoken`";
-			if ($limit > 0) {
-				$query .= " LIMIT " . (int)$limit;
-			}
-
-			// Fetching all changes
-			$stmt = $this->db->prepare($query);
-			$stmt->execute([$syncToken, $currentToken, $addressBookId]);
-
-			$changes = [];
-
-			// This loop ensures that any duplicates are overwritten, only the
-			// last change on a node is relevant.
-			while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-				$changes[$row['uri']] = $row['operation'];
-			}
-
-			foreach ($changes as $uri => $operation) {
-				switch ($operation) {
-					case 1:
-						$result['added'][] = $uri;
-						break;
-					case 2:
-						$result['modified'][] = $uri;
-						break;
-					case 3:
-						$result['deleted'][] = $uri;
-						break;
-				}
-			}
-		} else {
-			// No synctoken supplied, this is the initial sync.
-			$query = "SELECT `uri` FROM `*PREFIX*cards` WHERE `addressbookid` = ?";
-			$stmt = $this->db->prepare($query);
-			$stmt->execute([$addressBookId]);
-
-			$result['added'] = $stmt->fetchAll(\PDO::FETCH_COLUMN);
-		}
-		return $result;
-	}
-
-	/**
-	 * Adds a change record to the addressbookchanges table.
-	 *
-	 * @param mixed $addressBookId
-	 * @param string $objectUri
-	 * @param int $operation 1 = add, 2 = modify, 3 = delete
-	 * @return void
-	 */
-	protected function addChange($addressBookId, $objectUri, $operation) {
-		$sql = 'INSERT INTO `*PREFIX*addressbookchanges`(`uri`, `synctoken`, `addressbookid`, `operation`) SELECT ?, `synctoken`, ?, ? FROM `*PREFIX*addressbooks` WHERE `id` = ?';
-		$stmt = $this->db->prepare($sql);
-		$stmt->execute([
-			$objectUri,
-			$addressBookId,
-			$operation,
-			$addressBookId
-		]);
-		$stmt = $this->db->prepare('UPDATE `*PREFIX*addressbooks` SET `synctoken` = `synctoken` + 1 WHERE `id` = ?');
-		$stmt->execute([
-			$addressBookId
-		]);
-	}
-
-	/**
-	 * @param resource|string $cardData
-	 * @param bool $modified
-	 * @return string
-	 */
-	private function readBlob($cardData, &$modified = false) {
-		if (is_resource($cardData)) {
-			$cardData = stream_get_contents($cardData);
-		}
-
-		$cardDataArray = explode("\r\n", $cardData);
-
-		$cardDataFiltered = [];
-		$removingPhoto = false;
-		foreach ($cardDataArray as $line) {
-			if (strpos($line, 'PHOTO:data:') === 0
-				&& strpos($line, 'PHOTO:data:image/') !== 0) {
-				// Filter out PHOTO data of non-images
-				$removingPhoto = true;
-				$modified = true;
-				continue;
-			}
-
-			if ($removingPhoto) {
-				if (strpos($line, ' ') === 0) {
-					continue;
-				}
-				// No leading space means this is a new property
-				$removingPhoto = false;
-			}
-
-			$cardDataFiltered[] = $line;
-		}
-
-		return implode("\r\n", $cardDataFiltered);
-	}
-
-	/**
-	 * @param IShareable $shareable
-	 * @param string[] $add
-	 * @param string[] $remove
-	 */
-	public function updateShares(IShareable $shareable, $add, $remove) {
-		$addressBookId = $shareable->getResourceId();
-		$addressBookData = $this->getAddressBookById($addressBookId);
-		$oldShares = $this->getShares($addressBookId);
-
-		$this->sharingBackend->updateShares($shareable, $add, $remove);
-
-		$this->dispatcher->dispatchTyped(new AddressBookShareUpdatedEvent($addressBookId, $addressBookData, $oldShares, $add, $remove));
-	}
-
-	/**
-	 * Search contacts in a specific address-book
-	 *
-	 * @param int $addressBookId
-	 * @param string $pattern which should match within the $searchProperties
-	 * @param array $searchProperties defines the properties within the query pattern should match
-	 * @param array $options = array() to define the search behavior
-	 *    - 'escape_like_param' - If set to false wildcards _ and % are not escaped, otherwise they are
-	 *    - 'limit' - Set a numeric limit for the search results
-	 *    - 'offset' - Set the offset for the limited search results
-	 * @return array an array of contacts which are arrays of key-value-pairs
-	 */
-	public function search($addressBookId, $pattern, $searchProperties, $options = []): array {
-		return $this->searchByAddressBookIds([$addressBookId], $pattern, $searchProperties, $options);
-	}
-
-	/**
-	 * Search contacts in all address-books accessible by a user
-	 *
-	 * @param string $principalUri
-	 * @param string $pattern
-	 * @param array $searchProperties
-	 * @param array $options
-	 * @return array
-	 */
-	public function searchPrincipalUri(string $principalUri,
-									   string $pattern,
-									   array $searchProperties,
-									   array $options = []): array {
-		$addressBookIds = array_map(static function ($row):int {
-			return (int) $row['id'];
-		}, $this->getAddressBooksForUser($principalUri));
-
-		return $this->searchByAddressBookIds($addressBookIds, $pattern, $searchProperties, $options);
-	}
-
-	/**
-	 * @param array $addressBookIds
-	 * @param string $pattern
-	 * @param array $searchProperties
-	 * @param array $options
-	 * @return array
-	 */
-	private function searchByAddressBookIds(array $addressBookIds,
-											string $pattern,
-											array $searchProperties,
-											array $options = []): array {
-		$escapePattern = !\array_key_exists('escape_like_param', $options) || $options['escape_like_param'] !== false;
-
-		$query2 = $this->db->getQueryBuilder();
-
-		$addressBookOr =  $query2->expr()->orX();
-		foreach ($addressBookIds as $addressBookId) {
-			$addressBookOr->add($query2->expr()->eq('cp.addressbookid', $query2->createNamedParameter($addressBookId)));
-		}
-
-		if ($addressBookOr->count() === 0) {
-			return [];
-		}
-
-		$propertyOr = $query2->expr()->orX();
-		foreach ($searchProperties as $property) {
-			if ($escapePattern) {
-				if ($property === 'EMAIL' && strpos($pattern, ' ') !== false) {
-					// There can be no spaces in emails
-					continue;
-				}
-
-				if ($property === 'CLOUD' && preg_match('/[^a-zA-Z0-9 :_.@\/\-\']/', $pattern) === 1) {
-					// There can be no chars in cloud ids which are not valid for user ids plus :/
-					// worst case: CA61590A-BBBC-423E-84AF-E6DF01455A53@https://my.nxt/srv/
-					continue;
-				}
-			}
-
-			$propertyOr->add($query2->expr()->eq('cp.name', $query2->createNamedParameter($property)));
-		}
-
-		if ($propertyOr->count() === 0) {
-			return [];
-		}
-
-		$query2->selectDistinct('cp.cardid')
-			->from($this->dbCardsPropertiesTable, 'cp')
-			->andWhere($addressBookOr)
-			->andWhere($propertyOr);
-
-		// No need for like when the pattern is empty
-		if ('' !== $pattern) {
-			if (!$escapePattern) {
-				$query2->andWhere($query2->expr()->ilike('cp.value', $query2->createNamedParameter($pattern)));
-			} else {
-				$query2->andWhere($query2->expr()->ilike('cp.value', $query2->createNamedParameter('%' . $this->db->escapeLikeParameter($pattern) . '%')));
-			}
-		}
-
-		if (isset($options['limit'])) {
-			$query2->setMaxResults($options['limit']);
-		}
-		if (isset($options['offset'])) {
-			$query2->setFirstResult($options['offset']);
-		}
-
-		$result = $query2->execute();
-		$matches = $result->fetchAll();
-		$result->closeCursor();
-		$matches = array_map(function ($match) {
-			return (int)$match['cardid'];
-		}, $matches);
-
-		$query = $this->db->getQueryBuilder();
-		$query->select('c.addressbookid', 'c.carddata', 'c.uri')
-			->from($this->dbCardsTable, 'c')
-			->where($query->expr()->in('c.id', $query->createNamedParameter($matches, IQueryBuilder::PARAM_INT_ARRAY)));
-
-		$result = $query->execute();
-		$cards = $result->fetchAll();
-
-		$result->closeCursor();
-
-		return array_map(function ($array) {
-			$array['addressbookid'] = (int) $array['addressbookid'];
-			$modified = false;
-			$array['carddata'] = $this->readBlob($array['carddata'], $modified);
-			if ($modified) {
-				$array['size'] = strlen($array['carddata']);
-			}
-			return $array;
-		}, $cards);
-	}
-
-	/**
-	 * @param int $bookId
-	 * @param string $name
-	 * @return array
-	 */
-	public function collectCardProperties($bookId, $name) {
-		$query = $this->db->getQueryBuilder();
-		$result = $query->selectDistinct('value')
-			->from($this->dbCardsPropertiesTable)
-			->where($query->expr()->eq('name', $query->createNamedParameter($name)))
-			->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($bookId)))
-			->execute();
-
-		$all = $result->fetchAll(PDO::FETCH_COLUMN);
-		$result->closeCursor();
-
-		return $all;
-	}
-
-	/**
-	 * get URI from a given contact
-	 *
-	 * @param int $id
-	 * @return string
-	 */
-	public function getCardUri($id) {
-		$query = $this->db->getQueryBuilder();
-		$query->select('uri')->from($this->dbCardsTable)
-			->where($query->expr()->eq('id', $query->createParameter('id')))
-			->setParameter('id', $id);
-
-		$result = $query->execute();
-		$uri = $result->fetch();
-		$result->closeCursor();
-
-		if (!isset($uri['uri'])) {
-			throw new \InvalidArgumentException('Card does not exists: ' . $id);
-		}
-
-		return $uri['uri'];
-	}
-
-	/**
-	 * return contact with the given URI
-	 *
-	 * @param int $addressBookId
-	 * @param string $uri
-	 * @returns array
-	 */
-	public function getContact($addressBookId, $uri) {
-		$result = [];
-		$query = $this->db->getQueryBuilder();
-		$query->select('*')->from($this->dbCardsTable)
-			->where($query->expr()->eq('uri', $query->createNamedParameter($uri)))
-			->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
-		$queryResult = $query->execute();
-		$contact = $queryResult->fetch();
-		$queryResult->closeCursor();
-
-		if (is_array($contact)) {
-			$modified = false;
-			$contact['etag'] = '"' . $contact['etag'] . '"';
-			$contact['carddata'] = $this->readBlob($contact['carddata'], $modified);
-			if ($modified) {
-				$contact['size'] = strlen($contact['carddata']);
-			}
-
-			$result = $contact;
-		}
-
-		return $result;
-	}
-
-	/**
-	 * Returns the list of people whom this address book is shared with.
-	 *
-	 * Every element in this array should have the following properties:
-	 *   * href - Often a mailto: address
-	 *   * commonName - Optional, for example a first + last name
-	 *   * status - See the Sabre\CalDAV\SharingPlugin::STATUS_ constants.
-	 *   * readOnly - boolean
-	 *   * summary - Optional, a description for the share
-	 *
-	 * @return array
-	 */
-	public function getShares($addressBookId) {
-		return $this->sharingBackend->getShares($addressBookId);
-	}
-
-	/**
-	 * update properties table
-	 *
-	 * @param int $addressBookId
-	 * @param string $cardUri
-	 * @param string $vCardSerialized
-	 */
-	protected function updateProperties($addressBookId, $cardUri, $vCardSerialized) {
-		$cardId = $this->getCardId($addressBookId, $cardUri);
-		$vCard = $this->readCard($vCardSerialized);
-
-		$this->purgeProperties($addressBookId, $cardId);
-
-		$query = $this->db->getQueryBuilder();
-		$query->insert($this->dbCardsPropertiesTable)
-			->values(
-				[
-					'addressbookid' => $query->createNamedParameter($addressBookId),
-					'cardid' => $query->createNamedParameter($cardId),
-					'name' => $query->createParameter('name'),
-					'value' => $query->createParameter('value'),
-					'preferred' => $query->createParameter('preferred')
-				]
-			);
-
-		foreach ($vCard->children() as $property) {
-			if (!in_array($property->name, self::$indexProperties)) {
-				continue;
-			}
-			$preferred = 0;
-			foreach ($property->parameters as $parameter) {
-				if ($parameter->name === 'TYPE' && strtoupper($parameter->getValue()) === 'PREF') {
-					$preferred = 1;
-					break;
-				}
-			}
-			$query->setParameter('name', $property->name);
-			$query->setParameter('value', mb_substr($property->getValue(), 0, 254));
-			$query->setParameter('preferred', $preferred);
-			$query->execute();
-		}
-	}
-
-	/**
-	 * read vCard data into a vCard object
-	 *
-	 * @param string $cardData
-	 * @return VCard
-	 */
-	protected function readCard($cardData) {
-		return Reader::read($cardData);
-	}
-
-	/**
-	 * delete all properties from a given card
-	 *
-	 * @param int $addressBookId
-	 * @param int $cardId
-	 */
-	protected function purgeProperties($addressBookId, $cardId) {
-		$query = $this->db->getQueryBuilder();
-		$query->delete($this->dbCardsPropertiesTable)
-			->where($query->expr()->eq('cardid', $query->createNamedParameter($cardId)))
-			->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
-		$query->execute();
-	}
-
-	/**
-	 * get ID from a given contact
-	 *
-	 * @param int $addressBookId
-	 * @param string $uri
-	 * @return int
-	 */
-	protected function getCardId($addressBookId, $uri) {
-		$query = $this->db->getQueryBuilder();
-		$query->select('id')->from($this->dbCardsTable)
-			->where($query->expr()->eq('uri', $query->createNamedParameter($uri)))
-			->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
-
-		$result = $query->execute();
-		$cardIds = $result->fetch();
-		$result->closeCursor();
-
-		if (!isset($cardIds['id'])) {
-			throw new \InvalidArgumentException('Card does not exists: ' . $uri);
-		}
-
-		return (int)$cardIds['id'];
-	}
-
-	/**
-	 * For shared address books the sharee is set in the ACL of the address book
-	 *
-	 * @param $addressBookId
-	 * @param $acl
-	 * @return array
-	 */
-	public function applyShareAcl($addressBookId, $acl) {
-		return $this->sharingBackend->applyShareAcl($addressBookId, $acl);
-	}
-
-	private function convertPrincipal($principalUri, $toV2) {
-		if ($this->principalBackend->getPrincipalPrefix() === 'principals') {
-			list(, $name) = \Sabre\Uri\split($principalUri);
-			if ($toV2 === true) {
-				return "principals/users/$name";
-			}
-			return "principals/$name";
-		}
-		return $principalUri;
-	}
-
-	private function addOwnerPrincipal(&$addressbookInfo) {
-		$ownerPrincipalKey = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal';
-		$displaynameKey = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_NEXTCLOUD . '}owner-displayname';
-		if (isset($addressbookInfo[$ownerPrincipalKey])) {
-			$uri = $addressbookInfo[$ownerPrincipalKey];
-		} else {
-			$uri = $addressbookInfo['principaluri'];
-		}
-
-		$principalInformation = $this->principalBackend->getPrincipalByPath($uri);
-		if (isset($principalInformation['{DAV:}displayname'])) {
-			$addressbookInfo[$displaynameKey] = $principalInformation['{DAV:}displayname'];
-		}
-	}
-
-	/**
-	 * Extract UID from vcard
-	 *
-	 * @param string $cardData the vcard raw data
-	 * @return string the uid
-	 * @throws BadRequest if no UID is available
-	 */
-	private function getUID($cardData) {
-		if ($cardData != '') {
-			$vCard = Reader::read($cardData);
-			if ($vCard->UID) {
-				$uid = $vCard->UID->getValue();
-				return $uid;
-			}
-			// should already be handled, but just in case
-			throw new BadRequest('vCards on CardDAV servers MUST have a UID property');
-		}
-		// should already be handled, but just in case
-		throw new BadRequest('vCard can not be empty');
-	}
+    public const PERSONAL_ADDRESSBOOK_URI = 'contacts';
+    public const PERSONAL_ADDRESSBOOK_NAME = 'Contacts';
+
+    /** @var Principal */
+    private $principalBackend;
+
+    /** @var string */
+    private $dbCardsTable = 'cards';
+
+    /** @var string */
+    private $dbCardsPropertiesTable = 'cards_properties';
+
+    /** @var IDBConnection */
+    private $db;
+
+    /** @var Backend */
+    private $sharingBackend;
+
+    /** @var array properties to index */
+    public static $indexProperties = [
+        'BDAY', 'UID', 'N', 'FN', 'TITLE', 'ROLE', 'NOTE', 'NICKNAME',
+        'ORG', 'CATEGORIES', 'EMAIL', 'TEL', 'IMPP', 'ADR', 'URL', 'GEO', 'CLOUD'];
+
+    /**
+     * @var string[] Map of uid => display name
+     */
+    protected $userDisplayNames;
+
+    /** @var IUserManager */
+    private $userManager;
+
+    /** @var IEventDispatcher */
+    private $dispatcher;
+
+    /** @var EventDispatcherInterface */
+    private $legacyDispatcher;
+
+    private $etagCache = [];
+
+    /**
+     * CardDavBackend constructor.
+     *
+     * @param IDBConnection $db
+     * @param Principal $principalBackend
+     * @param IUserManager $userManager
+     * @param IGroupManager $groupManager
+     * @param IEventDispatcher $dispatcher
+     * @param EventDispatcherInterface $legacyDispatcher
+     */
+    public function __construct(IDBConnection $db,
+                                Principal $principalBackend,
+                                IUserManager $userManager,
+                                IGroupManager $groupManager,
+                                IEventDispatcher $dispatcher,
+                                EventDispatcherInterface $legacyDispatcher) {
+        $this->db = $db;
+        $this->principalBackend = $principalBackend;
+        $this->userManager = $userManager;
+        $this->dispatcher = $dispatcher;
+        $this->legacyDispatcher = $legacyDispatcher;
+        $this->sharingBackend = new Backend($this->db, $this->userManager, $groupManager, $principalBackend, 'addressbook');
+    }
+
+    /**
+     * Return the number of address books for a principal
+     *
+     * @param $principalUri
+     * @return int
+     */
+    public function getAddressBooksForUserCount($principalUri) {
+        $principalUri = $this->convertPrincipal($principalUri, true);
+        $query = $this->db->getQueryBuilder();
+        $query->select($query->func()->count('*'))
+            ->from('addressbooks')
+            ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)));
+
+        return (int)$query->execute()->fetchColumn();
+    }
+
+    /**
+     * Returns the list of address books for a specific user.
+     *
+     * Every addressbook should have the following properties:
+     *   id - an arbitrary unique id
+     *   uri - the 'basename' part of the url
+     *   principaluri - Same as the passed parameter
+     *
+     * Any additional clark-notation property may be passed besides this. Some
+     * common ones are :
+     *   {DAV:}displayname
+     *   {urn:ietf:params:xml:ns:carddav}addressbook-description
+     *   {http://calendarserver.org/ns/}getctag
+     *
+     * @param string $principalUri
+     * @return array
+     */
+    public function getAddressBooksForUser($principalUri) {
+        $principalUriOriginal = $principalUri;
+        $principalUri = $this->convertPrincipal($principalUri, true);
+        $query = $this->db->getQueryBuilder();
+        $query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
+            ->from('addressbooks')
+            ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)));
+
+        $addressBooks = [];
+
+        $result = $query->execute();
+        while ($row = $result->fetch()) {
+            $addressBooks[$row['id']] = [
+                'id' => $row['id'],
+                'uri' => $row['uri'],
+                'principaluri' => $this->convertPrincipal($row['principaluri'], false),
+                '{DAV:}displayname' => $row['displayname'],
+                '{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
+                '{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
+            ];
+
+            $this->addOwnerPrincipal($addressBooks[$row['id']]);
+        }
+        $result->closeCursor();
+
+        // query for shared addressbooks
+        $principals = $this->principalBackend->getGroupMembership($principalUriOriginal, true);
+        $principals = array_merge($principals, $this->principalBackend->getCircleMembership($principalUriOriginal));
+
+        $principals = array_map(function ($principal) {
+            return urldecode($principal);
+        }, $principals);
+        $principals[] = $principalUri;
+
+        $query = $this->db->getQueryBuilder();
+        $result = $query->select(['a.id', 'a.uri', 'a.displayname', 'a.principaluri', 'a.description', 'a.synctoken', 's.access'])
+            ->from('dav_shares', 's')
+            ->join('s', 'addressbooks', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
+            ->where($query->expr()->in('s.principaluri', $query->createParameter('principaluri')))
+            ->andWhere($query->expr()->eq('s.type', $query->createParameter('type')))
+            ->setParameter('type', 'addressbook')
+            ->setParameter('principaluri', $principals, IQueryBuilder::PARAM_STR_ARRAY)
+            ->execute();
+
+        $readOnlyPropertyName = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only';
+        while ($row = $result->fetch()) {
+            if ($row['principaluri'] === $principalUri) {
+                continue;
+            }
+
+            $readOnly = (int)$row['access'] === Backend::ACCESS_READ;
+            if (isset($addressBooks[$row['id']])) {
+                if ($readOnly) {
+                    // New share can not have more permissions then the old one.
+                    continue;
+                }
+                if (isset($addressBooks[$row['id']][$readOnlyPropertyName]) &&
+                    $addressBooks[$row['id']][$readOnlyPropertyName] === 0) {
+                    // Old share is already read-write, no more permissions can be gained
+                    continue;
+                }
+            }
+
+            list(, $name) = \Sabre\Uri\split($row['principaluri']);
+            $uri = $row['uri'] . '_shared_by_' . $name;
+            $displayName = $row['displayname'] . ' (' . $this->getUserDisplayName($name) . ')';
+
+            $addressBooks[$row['id']] = [
+                'id' => $row['id'],
+                'uri' => $uri,
+                'principaluri' => $principalUriOriginal,
+                '{DAV:}displayname' => $displayName,
+                '{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
+                '{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
+                '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $row['principaluri'],
+                $readOnlyPropertyName => $readOnly,
+            ];
+
+            $this->addOwnerPrincipal($addressBooks[$row['id']]);
+        }
+        $result->closeCursor();
+
+        return array_values($addressBooks);
+    }
+
+    public function getUsersOwnAddressBooks($principalUri) {
+        $principalUri = $this->convertPrincipal($principalUri, true);
+        $query = $this->db->getQueryBuilder();
+        $query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
+            ->from('addressbooks')
+            ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)));
+
+        $addressBooks = [];
+
+        $result = $query->execute();
+        while ($row = $result->fetch()) {
+            $addressBooks[$row['id']] = [
+                'id' => $row['id'],
+                'uri' => $row['uri'],
+                'principaluri' => $this->convertPrincipal($row['principaluri'], false),
+                '{DAV:}displayname' => $row['displayname'],
+                '{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
+                '{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
+            ];
+
+            $this->addOwnerPrincipal($addressBooks[$row['id']]);
+        }
+        $result->closeCursor();
+
+        return array_values($addressBooks);
+    }
+
+    private function getUserDisplayName($uid) {
+        if (!isset($this->userDisplayNames[$uid])) {
+            $user = $this->userManager->get($uid);
+
+            if ($user instanceof IUser) {
+                $this->userDisplayNames[$uid] = $user->getDisplayName();
+            } else {
+                $this->userDisplayNames[$uid] = $uid;
+            }
+        }
+
+        return $this->userDisplayNames[$uid];
+    }
+
+    /**
+     * @param int $addressBookId
+     */
+    public function getAddressBookById($addressBookId) {
+        $query = $this->db->getQueryBuilder();
+        $result = $query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
+            ->from('addressbooks')
+            ->where($query->expr()->eq('id', $query->createNamedParameter($addressBookId)))
+            ->execute();
+
+        $row = $result->fetch();
+        $result->closeCursor();
+        if ($row === false) {
+            return null;
+        }
+
+        $addressBook = [
+            'id' => $row['id'],
+            'uri' => $row['uri'],
+            'principaluri' => $row['principaluri'],
+            '{DAV:}displayname' => $row['displayname'],
+            '{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
+            '{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
+            '{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
+        ];
+
+        $this->addOwnerPrincipal($addressBook);
+
+        return $addressBook;
+    }
+
+    /**
+     * @param $addressBookUri
+     * @return array|null
+     */
+    public function getAddressBooksByUri($principal, $addressBookUri) {
+        $query = $this->db->getQueryBuilder();
+        $result = $query->select(['id', 'uri', 'displayname', 'principaluri', 'description', 'synctoken'])
+            ->from('addressbooks')
+            ->where($query->expr()->eq('uri', $query->createNamedParameter($addressBookUri)))
+            ->andWhere($query->expr()->eq('principaluri', $query->createNamedParameter($principal)))
+            ->setMaxResults(1)
+            ->execute();
+
+        $row = $result->fetch();
+        $result->closeCursor();
+        if ($row === false) {
+            return null;
+        }
+
+        $addressBook = [
+            'id' => $row['id'],
+            'uri' => $row['uri'],
+            'principaluri' => $row['principaluri'],
+            '{DAV:}displayname' => $row['displayname'],
+            '{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
+            '{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
+            '{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
+        ];
+
+        $this->addOwnerPrincipal($addressBook);
+
+        return $addressBook;
+    }
+
+    /**
+     * Updates properties for an address book.
+     *
+     * The list of mutations is stored in a Sabre\DAV\PropPatch object.
+     * To do the actual updates, you must tell this object which properties
+     * you're going to process with the handle() method.
+     *
+     * Calling the handle method is like telling the PropPatch object "I
+     * promise I can handle updating this property".
+     *
+     * Read the PropPatch documentation for more info and examples.
+     *
+     * @param string $addressBookId
+     * @param \Sabre\DAV\PropPatch $propPatch
+     * @return void
+     */
+    public function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch) {
+        $supportedProperties = [
+            '{DAV:}displayname',
+            '{' . Plugin::NS_CARDDAV . '}addressbook-description',
+        ];
+
+        $propPatch->handle($supportedProperties, function ($mutations) use ($addressBookId) {
+            $updates = [];
+            foreach ($mutations as $property => $newValue) {
+                switch ($property) {
+                    case '{DAV:}displayname':
+                        $updates['displayname'] = $newValue;
+                        break;
+                    case '{' . Plugin::NS_CARDDAV . '}addressbook-description':
+                        $updates['description'] = $newValue;
+                        break;
+                }
+            }
+            $query = $this->db->getQueryBuilder();
+            $query->update('addressbooks');
+
+            foreach ($updates as $key => $value) {
+                $query->set($key, $query->createNamedParameter($value));
+            }
+            $query->where($query->expr()->eq('id', $query->createNamedParameter($addressBookId)))
+                ->execute();
+
+            $this->addChange($addressBookId, "", 2);
+
+            $addressBookRow = $this->getAddressBookById((int)$addressBookId);
+            $shares = $this->getShares($addressBookId);
+            $this->dispatcher->dispatchTyped(new AddressBookUpdatedEvent((int)$addressBookId, $addressBookRow, $shares, $mutations));
+
+            return true;
+        });
+    }
+
+    /**
+     * Creates a new address book
+     *
+     * @param string $principalUri
+     * @param string $url Just the 'basename' of the url.
+     * @param array $properties
+     * @return int
+     * @throws BadRequest
+     */
+    public function createAddressBook($principalUri, $url, array $properties) {
+        $values = [
+            'displayname' => null,
+            'description' => null,
+            'principaluri' => $principalUri,
+            'uri' => $url,
+            'synctoken' => 1
+        ];
+
+        foreach ($properties as $property => $newValue) {
+            switch ($property) {
+                case '{DAV:}displayname':
+                    $values['displayname'] = $newValue;
+                    break;
+                case '{' . Plugin::NS_CARDDAV . '}addressbook-description':
+                    $values['description'] = $newValue;
+                    break;
+                default:
+                    throw new BadRequest('Unknown property: ' . $property);
+            }
+        }
+
+        // Fallback to make sure the displayname is set. Some clients may refuse
+        // to work with addressbooks not having a displayname.
+        if (is_null($values['displayname'])) {
+            $values['displayname'] = $url;
+        }
+
+        $query = $this->db->getQueryBuilder();
+        $query->insert('addressbooks')
+            ->values([
+                'uri' => $query->createParameter('uri'),
+                'displayname' => $query->createParameter('displayname'),
+                'description' => $query->createParameter('description'),
+                'principaluri' => $query->createParameter('principaluri'),
+                'synctoken' => $query->createParameter('synctoken'),
+            ])
+            ->setParameters($values)
+            ->execute();
+
+        $addressBookId = $query->getLastInsertId();
+        $addressBookRow = $this->getAddressBookById($addressBookId);
+        $this->dispatcher->dispatchTyped(new AddressBookCreatedEvent((int)$addressBookId, $addressBookRow));
+
+        return $addressBookId;
+    }
+
+    /**
+     * Deletes an entire addressbook and all its contents
+     *
+     * @param mixed $addressBookId
+     * @return void
+     */
+    public function deleteAddressBook($addressBookId) {
+        $addressBookData = $this->getAddressBookById($addressBookId);
+        $shares = $this->getShares($addressBookId);
+
+        $query = $this->db->getQueryBuilder();
+        $query->delete($this->dbCardsTable)
+            ->where($query->expr()->eq('addressbookid', $query->createParameter('addressbookid')))
+            ->setParameter('addressbookid', $addressBookId)
+            ->execute();
+
+        $query->delete('addressbookchanges')
+            ->where($query->expr()->eq('addressbookid', $query->createParameter('addressbookid')))
+            ->setParameter('addressbookid', $addressBookId)
+            ->execute();
+
+        $query->delete('addressbooks')
+            ->where($query->expr()->eq('id', $query->createParameter('id')))
+            ->setParameter('id', $addressBookId)
+            ->execute();
+
+        $this->sharingBackend->deleteAllShares($addressBookId);
+
+        $query->delete($this->dbCardsPropertiesTable)
+            ->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
+            ->execute();
+
+        if ($addressBookData) {
+            $this->dispatcher->dispatchTyped(new AddressBookDeletedEvent((int) $addressBookId, $addressBookData, $shares));
+        }
+    }
+
+    /**
+     * Returns all cards for a specific addressbook id.
+     *
+     * This method should return the following properties for each card:
+     *   * carddata - raw vcard data
+     *   * uri - Some unique url
+     *   * lastmodified - A unix timestamp
+     *
+     * It's recommended to also return the following properties:
+     *   * etag - A unique etag. This must change every time the card changes.
+     *   * size - The size of the card in bytes.
+     *
+     * If these last two properties are provided, less time will be spent
+     * calculating them. If they are specified, you can also ommit carddata.
+     * This may speed up certain requests, especially with large cards.
+     *
+     * @param mixed $addressBookId
+     * @return array
+     */
+    public function getCards($addressBookId) {
+        $query = $this->db->getQueryBuilder();
+        $query->select(['id', 'uri', 'lastmodified', 'etag', 'size', 'carddata', 'uid'])
+            ->from($this->dbCardsTable)
+            ->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
+
+        $cards = [];
+
+        $result = $query->execute();
+        while ($row = $result->fetch()) {
+            $row['etag'] = '"' . $row['etag'] . '"';
+
+            $modified = false;
+            $row['carddata'] = $this->readBlob($row['carddata'], $modified);
+            if ($modified) {
+                $row['size'] = strlen($row['carddata']);
+            }
+
+            $cards[] = $row;
+        }
+        $result->closeCursor();
+
+        return $cards;
+    }
+
+    /**
+     * Returns a specific card.
+     *
+     * The same set of properties must be returned as with getCards. The only
+     * exception is that 'carddata' is absolutely required.
+     *
+     * If the card does not exist, you must return false.
+     *
+     * @param mixed $addressBookId
+     * @param string $cardUri
+     * @return array
+     */
+    public function getCard($addressBookId, $cardUri) {
+        $query = $this->db->getQueryBuilder();
+        $query->select(['id', 'uri', 'lastmodified', 'etag', 'size', 'carddata', 'uid'])
+            ->from($this->dbCardsTable)
+            ->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
+            ->andWhere($query->expr()->eq('uri', $query->createNamedParameter($cardUri)))
+            ->setMaxResults(1);
+
+        $result = $query->execute();
+        $row = $result->fetch();
+        if (!$row) {
+            return false;
+        }
+        $row['etag'] = '"' . $row['etag'] . '"';
+
+        $modified = false;
+        $row['carddata'] = $this->readBlob($row['carddata'], $modified);
+        if ($modified) {
+            $row['size'] = strlen($row['carddata']);
+        }
+
+        return $row;
+    }
+
+    /**
+     * Returns a list of cards.
+     *
+     * This method should work identical to getCard, but instead return all the
+     * cards in the list as an array.
+     *
+     * If the backend supports this, it may allow for some speed-ups.
+     *
+     * @param mixed $addressBookId
+     * @param string[] $uris
+     * @return array
+     */
+    public function getMultipleCards($addressBookId, array $uris) {
+        if (empty($uris)) {
+            return [];
+        }
+
+        $chunks = array_chunk($uris, 100);
+        $cards = [];
+
+        $query = $this->db->getQueryBuilder();
+        $query->select(['id', 'uri', 'lastmodified', 'etag', 'size', 'carddata', 'uid'])
+            ->from($this->dbCardsTable)
+            ->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
+            ->andWhere($query->expr()->in('uri', $query->createParameter('uri')));
+
+        foreach ($chunks as $uris) {
+            $query->setParameter('uri', $uris, IQueryBuilder::PARAM_STR_ARRAY);
+            $result = $query->execute();
+
+            while ($row = $result->fetch()) {
+                $row['etag'] = '"' . $row['etag'] . '"';
+
+                $modified = false;
+                $row['carddata'] = $this->readBlob($row['carddata'], $modified);
+                if ($modified) {
+                    $row['size'] = strlen($row['carddata']);
+                }
+
+                $cards[] = $row;
+            }
+            $result->closeCursor();
+        }
+        return $cards;
+    }
+
+    /**
+     * Creates a new card.
+     *
+     * The addressbook id will be passed as the first argument. This is the
+     * same id as it is returned from the getAddressBooksForUser method.
+     *
+     * The cardUri is a base uri, and doesn't include the full path. The
+     * cardData argument is the vcard body, and is passed as a string.
+     *
+     * It is possible to return an ETag from this method. This ETag is for the
+     * newly created resource, and must be enclosed with double quotes (that
+     * is, the string itself must contain the double quotes).
+     *
+     * You should only return the ETag if you store the carddata as-is. If a
+     * subsequent GET request on the same card does not have the same body,
+     * byte-by-byte and you did return an ETag here, clients tend to get
+     * confused.
+     *
+     * If you don't return an ETag, you can just return null.
+     *
+     * @param mixed $addressBookId
+     * @param string $cardUri
+     * @param string $cardData
+     * @return string
+     */
+    public function createCard($addressBookId, $cardUri, $cardData) {
+        $etag = md5($cardData);
+        $uid = $this->getUID($cardData);
+
+        $q = $this->db->getQueryBuilder();
+        $q->select('uid')
+            ->from($this->dbCardsTable)
+            ->where($q->expr()->eq('addressbookid', $q->createNamedParameter($addressBookId)))
+            ->andWhere($q->expr()->eq('uid', $q->createNamedParameter($uid)))
+            ->setMaxResults(1);
+        $result = $q->execute();
+        $count = (bool)$result->fetchColumn();
+        $result->closeCursor();
+        if ($count) {
+            throw new \Sabre\DAV\Exception\BadRequest('VCard object with uid already exists in this addressbook collection.');
+        }
+
+        $query = $this->db->getQueryBuilder();
+        $query->insert('cards')
+            ->values([
+                'carddata' => $query->createNamedParameter($cardData, IQueryBuilder::PARAM_LOB),
+                'uri' => $query->createNamedParameter($cardUri),
+                'lastmodified' => $query->createNamedParameter(time()),
+                'addressbookid' => $query->createNamedParameter($addressBookId),
+                'size' => $query->createNamedParameter(strlen($cardData)),
+                'etag' => $query->createNamedParameter($etag),
+                'uid' => $query->createNamedParameter($uid),
+            ])
+            ->execute();
+
+        $etagCacheKey = "$addressBookId#$cardUri";
+        $this->etagCache[$etagCacheKey] = $etag;
+
+        $this->addChange($addressBookId, $cardUri, 1);
+        $this->updateProperties($addressBookId, $cardUri, $cardData);
+
+        $addressBookData = $this->getAddressBookById($addressBookId);
+        $shares = $this->getShares($addressBookId);
+        $objectRow = $this->getCard($addressBookId, $cardUri);
+        $this->dispatcher->dispatchTyped(new CardCreatedEvent((int)$addressBookId, $addressBookData, $shares, $objectRow));
+        $this->legacyDispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::createCard',
+            new GenericEvent(null, [
+                'addressBookId' => $addressBookId,
+                'cardUri' => $cardUri,
+                'cardData' => $cardData]));
+
+        return '"' . $etag . '"';
+    }
+
+    /**
+     * Updates a card.
+     *
+     * The addressbook id will be passed as the first argument. This is the
+     * same id as it is returned from the getAddressBooksForUser method.
+     *
+     * The cardUri is a base uri, and doesn't include the full path. The
+     * cardData argument is the vcard body, and is passed as a string.
+     *
+     * It is possible to return an ETag from this method. This ETag should
+     * match that of the updated resource, and must be enclosed with double
+     * quotes (that is: the string itself must contain the actual quotes).
+     *
+     * You should only return the ETag if you store the carddata as-is. If a
+     * subsequent GET request on the same card does not have the same body,
+     * byte-by-byte and you did return an ETag here, clients tend to get
+     * confused.
+     *
+     * If you don't return an ETag, you can just return null.
+     *
+     * @param mixed $addressBookId
+     * @param string $cardUri
+     * @param string $cardData
+     * @return string
+     */
+    public function updateCard($addressBookId, $cardUri, $cardData) {
+        $uid = $this->getUID($cardData);
+        $etag = md5($cardData);
+        $query = $this->db->getQueryBuilder();
+
+        // check for recently stored etag and stop if it is the same
+        $etagCacheKey = "$addressBookId#$cardUri";
+        if (isset($this->etagCache[$etagCacheKey]) && $this->etagCache[$etagCacheKey] === $etag) {
+            return '"' . $etag . '"';
+        }
+
+        $query->update($this->dbCardsTable)
+            ->set('carddata', $query->createNamedParameter($cardData, IQueryBuilder::PARAM_LOB))
+            ->set('lastmodified', $query->createNamedParameter(time()))
+            ->set('size', $query->createNamedParameter(strlen($cardData)))
+            ->set('etag', $query->createNamedParameter($etag))
+            ->set('uid', $query->createNamedParameter($uid))
+            ->where($query->expr()->eq('uri', $query->createNamedParameter($cardUri)))
+            ->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
+            ->execute();
+
+        $this->etagCache[$etagCacheKey] = $etag;
+
+        $this->addChange($addressBookId, $cardUri, 2);
+        $this->updateProperties($addressBookId, $cardUri, $cardData);
+
+        $addressBookData = $this->getAddressBookById($addressBookId);
+        $shares = $this->getShares($addressBookId);
+        $objectRow = $this->getCard($addressBookId, $cardUri);
+        $this->dispatcher->dispatchTyped(new CardUpdatedEvent((int)$addressBookId, $addressBookData, $shares, $objectRow));
+        $this->legacyDispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::updateCard',
+            new GenericEvent(null, [
+                'addressBookId' => $addressBookId,
+                'cardUri' => $cardUri,
+                'cardData' => $cardData]));
+
+        return '"' . $etag . '"';
+    }
+
+    /**
+     * Deletes a card
+     *
+     * @param mixed $addressBookId
+     * @param string $cardUri
+     * @return bool
+     */
+    public function deleteCard($addressBookId, $cardUri) {
+        $addressBookData = $this->getAddressBookById($addressBookId);
+        $shares = $this->getShares($addressBookId);
+        $objectRow = $this->getCard($addressBookId, $cardUri);
+
+        try {
+            $cardId = $this->getCardId($addressBookId, $cardUri);
+        } catch (\InvalidArgumentException $e) {
+            $cardId = null;
+        }
+        $query = $this->db->getQueryBuilder();
+        $ret = $query->delete($this->dbCardsTable)
+            ->where($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)))
+            ->andWhere($query->expr()->eq('uri', $query->createNamedParameter($cardUri)))
+            ->execute();
+
+        $this->addChange($addressBookId, $cardUri, 3);
+
+        if ($ret === 1) {
+            if ($cardId !== null) {
+                $this->dispatcher->dispatchTyped(new CardDeletedEvent((int)$addressBookId, $addressBookData, $shares, $objectRow));
+                $this->legacyDispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::deleteCard',
+                    new GenericEvent(null, [
+                        'addressBookId' => $addressBookId,
+                        'cardUri' => $cardUri]));
+
+                $this->purgeProperties($addressBookId, $cardId);
+            }
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * The getChanges method returns all the changes that have happened, since
+     * the specified syncToken in the specified address book.
+     *
+     * This function should return an array, such as the following:
+     *
+     * [
+     *   'syncToken' => 'The current synctoken',
+     *   'added'   => [
+     *      'new.txt',
+     *   ],
+     *   'modified'   => [
+     *      'modified.txt',
+     *   ],
+     *   'deleted' => [
+     *      'foo.php.bak',
+     *      'old.txt'
+     *   ]
+     * ];
+     *
+     * The returned syncToken property should reflect the *current* syncToken
+     * of the calendar, as reported in the {http://sabredav.org/ns}sync-token
+     * property. This is needed here too, to ensure the operation is atomic.
+     *
+     * If the $syncToken argument is specified as null, this is an initial
+     * sync, and all members should be reported.
+     *
+     * The modified property is an array of nodenames that have changed since
+     * the last token.
+     *
+     * The deleted property is an array with nodenames, that have been deleted
+     * from collection.
+     *
+     * The $syncLevel argument is basically the 'depth' of the report. If it's
+     * 1, you only have to report changes that happened only directly in
+     * immediate descendants. If it's 2, it should also include changes from
+     * the nodes below the child collections. (grandchildren)
+     *
+     * The $limit argument allows a client to specify how many results should
+     * be returned at most. If the limit is not specified, it should be treated
+     * as infinite.
+     *
+     * If the limit (infinite or not) is higher than you're willing to return,
+     * you should throw a Sabre\DAV\Exception\TooMuchMatches() exception.
+     *
+     * If the syncToken is expired (due to data cleanup) or unknown, you must
+     * return null.
+     *
+     * The limit is 'suggestive'. You are free to ignore it.
+     *
+     * @param string $addressBookId
+     * @param string $syncToken
+     * @param int $syncLevel
+     * @param int $limit
+     * @return array
+     */
+    public function getChangesForAddressBook($addressBookId, $syncToken, $syncLevel, $limit = null) {
+        // Current synctoken
+        $stmt = $this->db->prepare('SELECT `synctoken` FROM `*PREFIX*addressbooks` WHERE `id` = ?');
+        $stmt->execute([$addressBookId]);
+        $currentToken = $stmt->fetchColumn(0);
+
+        if (is_null($currentToken)) {
+            return null;
+        }
+
+        $result = [
+            'syncToken' => $currentToken,
+            'added' => [],
+            'modified' => [],
+            'deleted' => [],
+        ];
+
+        if ($syncToken) {
+            $query = "SELECT `uri`, `operation` FROM `*PREFIX*addressbookchanges` WHERE `synctoken` >= ? AND `synctoken` < ? AND `addressbookid` = ? ORDER BY `synctoken`";
+            if ($limit > 0) {
+                $query .= " LIMIT " . (int)$limit;
+            }
+
+            // Fetching all changes
+            $stmt = $this->db->prepare($query);
+            $stmt->execute([$syncToken, $currentToken, $addressBookId]);
+
+            $changes = [];
+
+            // This loop ensures that any duplicates are overwritten, only the
+            // last change on a node is relevant.
+            while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+                $changes[$row['uri']] = $row['operation'];
+            }
+
+            foreach ($changes as $uri => $operation) {
+                switch ($operation) {
+                    case 1:
+                        $result['added'][] = $uri;
+                        break;
+                    case 2:
+                        $result['modified'][] = $uri;
+                        break;
+                    case 3:
+                        $result['deleted'][] = $uri;
+                        break;
+                }
+            }
+        } else {
+            // No synctoken supplied, this is the initial sync.
+            $query = "SELECT `uri` FROM `*PREFIX*cards` WHERE `addressbookid` = ?";
+            $stmt = $this->db->prepare($query);
+            $stmt->execute([$addressBookId]);
+
+            $result['added'] = $stmt->fetchAll(\PDO::FETCH_COLUMN);
+        }
+        return $result;
+    }
+
+    /**
+     * Adds a change record to the addressbookchanges table.
+     *
+     * @param mixed $addressBookId
+     * @param string $objectUri
+     * @param int $operation 1 = add, 2 = modify, 3 = delete
+     * @return void
+     */
+    protected function addChange($addressBookId, $objectUri, $operation) {
+        $sql = 'INSERT INTO `*PREFIX*addressbookchanges`(`uri`, `synctoken`, `addressbookid`, `operation`) SELECT ?, `synctoken`, ?, ? FROM `*PREFIX*addressbooks` WHERE `id` = ?';
+        $stmt = $this->db->prepare($sql);
+        $stmt->execute([
+            $objectUri,
+            $addressBookId,
+            $operation,
+            $addressBookId
+        ]);
+        $stmt = $this->db->prepare('UPDATE `*PREFIX*addressbooks` SET `synctoken` = `synctoken` + 1 WHERE `id` = ?');
+        $stmt->execute([
+            $addressBookId
+        ]);
+    }
+
+    /**
+     * @param resource|string $cardData
+     * @param bool $modified
+     * @return string
+     */
+    private function readBlob($cardData, &$modified = false) {
+        if (is_resource($cardData)) {
+            $cardData = stream_get_contents($cardData);
+        }
+
+        $cardDataArray = explode("\r\n", $cardData);
+
+        $cardDataFiltered = [];
+        $removingPhoto = false;
+        foreach ($cardDataArray as $line) {
+            if (strpos($line, 'PHOTO:data:') === 0
+                && strpos($line, 'PHOTO:data:image/') !== 0) {
+                // Filter out PHOTO data of non-images
+                $removingPhoto = true;
+                $modified = true;
+                continue;
+            }
+
+            if ($removingPhoto) {
+                if (strpos($line, ' ') === 0) {
+                    continue;
+                }
+                // No leading space means this is a new property
+                $removingPhoto = false;
+            }
+
+            $cardDataFiltered[] = $line;
+        }
+
+        return implode("\r\n", $cardDataFiltered);
+    }
+
+    /**
+     * @param IShareable $shareable
+     * @param string[] $add
+     * @param string[] $remove
+     */
+    public function updateShares(IShareable $shareable, $add, $remove) {
+        $addressBookId = $shareable->getResourceId();
+        $addressBookData = $this->getAddressBookById($addressBookId);
+        $oldShares = $this->getShares($addressBookId);
+
+        $this->sharingBackend->updateShares($shareable, $add, $remove);
+
+        $this->dispatcher->dispatchTyped(new AddressBookShareUpdatedEvent($addressBookId, $addressBookData, $oldShares, $add, $remove));
+    }
+
+    /**
+     * Search contacts in a specific address-book
+     *
+     * @param int $addressBookId
+     * @param string $pattern which should match within the $searchProperties
+     * @param array $searchProperties defines the properties within the query pattern should match
+     * @param array $options = array() to define the search behavior
+     *    - 'escape_like_param' - If set to false wildcards _ and % are not escaped, otherwise they are
+     *    - 'limit' - Set a numeric limit for the search results
+     *    - 'offset' - Set the offset for the limited search results
+     * @return array an array of contacts which are arrays of key-value-pairs
+     */
+    public function search($addressBookId, $pattern, $searchProperties, $options = []): array {
+        return $this->searchByAddressBookIds([$addressBookId], $pattern, $searchProperties, $options);
+    }
+
+    /**
+     * Search contacts in all address-books accessible by a user
+     *
+     * @param string $principalUri
+     * @param string $pattern
+     * @param array $searchProperties
+     * @param array $options
+     * @return array
+     */
+    public function searchPrincipalUri(string $principalUri,
+                                        string $pattern,
+                                        array $searchProperties,
+                                        array $options = []): array {
+        $addressBookIds = array_map(static function ($row):int {
+            return (int) $row['id'];
+        }, $this->getAddressBooksForUser($principalUri));
+
+        return $this->searchByAddressBookIds($addressBookIds, $pattern, $searchProperties, $options);
+    }
+
+    /**
+     * @param array $addressBookIds
+     * @param string $pattern
+     * @param array $searchProperties
+     * @param array $options
+     * @return array
+     */
+    private function searchByAddressBookIds(array $addressBookIds,
+                                            string $pattern,
+                                            array $searchProperties,
+                                            array $options = []): array {
+        $escapePattern = !\array_key_exists('escape_like_param', $options) || $options['escape_like_param'] !== false;
+
+        $query2 = $this->db->getQueryBuilder();
+
+        $addressBookOr =  $query2->expr()->orX();
+        foreach ($addressBookIds as $addressBookId) {
+            $addressBookOr->add($query2->expr()->eq('cp.addressbookid', $query2->createNamedParameter($addressBookId)));
+        }
+
+        if ($addressBookOr->count() === 0) {
+            return [];
+        }
+
+        $propertyOr = $query2->expr()->orX();
+        foreach ($searchProperties as $property) {
+            if ($escapePattern) {
+                if ($property === 'EMAIL' && strpos($pattern, ' ') !== false) {
+                    // There can be no spaces in emails
+                    continue;
+                }
+
+                if ($property === 'CLOUD' && preg_match('/[^a-zA-Z0-9 :_.@\/\-\']/', $pattern) === 1) {
+                    // There can be no chars in cloud ids which are not valid for user ids plus :/
+                    // worst case: CA61590A-BBBC-423E-84AF-E6DF01455A53@https://my.nxt/srv/
+                    continue;
+                }
+            }
+
+            $propertyOr->add($query2->expr()->eq('cp.name', $query2->createNamedParameter($property)));
+        }
+
+        if ($propertyOr->count() === 0) {
+            return [];
+        }
+
+        $query2->selectDistinct('cp.cardid')
+            ->from($this->dbCardsPropertiesTable, 'cp')
+            ->andWhere($addressBookOr)
+            ->andWhere($propertyOr);
+
+        // No need for like when the pattern is empty
+        if ('' !== $pattern) {
+            if (!$escapePattern) {
+                $query2->andWhere($query2->expr()->ilike('cp.value', $query2->createNamedParameter($pattern)));
+            } else {
+                $query2->andWhere($query2->expr()->ilike('cp.value', $query2->createNamedParameter('%' . $this->db->escapeLikeParameter($pattern) . '%')));
+            }
+        }
+
+        if (isset($options['limit'])) {
+            $query2->setMaxResults($options['limit']);
+        }
+        if (isset($options['offset'])) {
+            $query2->setFirstResult($options['offset']);
+        }
+
+        $result = $query2->execute();
+        $matches = $result->fetchAll();
+        $result->closeCursor();
+        $matches = array_map(function ($match) {
+            return (int)$match['cardid'];
+        }, $matches);
+
+        $query = $this->db->getQueryBuilder();
+        $query->select('c.addressbookid', 'c.carddata', 'c.uri')
+            ->from($this->dbCardsTable, 'c')
+            ->where($query->expr()->in('c.id', $query->createNamedParameter($matches, IQueryBuilder::PARAM_INT_ARRAY)));
+
+        $result = $query->execute();
+        $cards = $result->fetchAll();
+
+        $result->closeCursor();
+
+        return array_map(function ($array) {
+            $array['addressbookid'] = (int) $array['addressbookid'];
+            $modified = false;
+            $array['carddata'] = $this->readBlob($array['carddata'], $modified);
+            if ($modified) {
+                $array['size'] = strlen($array['carddata']);
+            }
+            return $array;
+        }, $cards);
+    }
+
+    /**
+     * @param int $bookId
+     * @param string $name
+     * @return array
+     */
+    public function collectCardProperties($bookId, $name) {
+        $query = $this->db->getQueryBuilder();
+        $result = $query->selectDistinct('value')
+            ->from($this->dbCardsPropertiesTable)
+            ->where($query->expr()->eq('name', $query->createNamedParameter($name)))
+            ->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($bookId)))
+            ->execute();
+
+        $all = $result->fetchAll(PDO::FETCH_COLUMN);
+        $result->closeCursor();
+
+        return $all;
+    }
+
+    /**
+     * get URI from a given contact
+     *
+     * @param int $id
+     * @return string
+     */
+    public function getCardUri($id) {
+        $query = $this->db->getQueryBuilder();
+        $query->select('uri')->from($this->dbCardsTable)
+            ->where($query->expr()->eq('id', $query->createParameter('id')))
+            ->setParameter('id', $id);
+
+        $result = $query->execute();
+        $uri = $result->fetch();
+        $result->closeCursor();
+
+        if (!isset($uri['uri'])) {
+            throw new \InvalidArgumentException('Card does not exists: ' . $id);
+        }
+
+        return $uri['uri'];
+    }
+
+    /**
+     * return contact with the given URI
+     *
+     * @param int $addressBookId
+     * @param string $uri
+     * @returns array
+     */
+    public function getContact($addressBookId, $uri) {
+        $result = [];
+        $query = $this->db->getQueryBuilder();
+        $query->select('*')->from($this->dbCardsTable)
+            ->where($query->expr()->eq('uri', $query->createNamedParameter($uri)))
+            ->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
+        $queryResult = $query->execute();
+        $contact = $queryResult->fetch();
+        $queryResult->closeCursor();
+
+        if (is_array($contact)) {
+            $modified = false;
+            $contact['etag'] = '"' . $contact['etag'] . '"';
+            $contact['carddata'] = $this->readBlob($contact['carddata'], $modified);
+            if ($modified) {
+                $contact['size'] = strlen($contact['carddata']);
+            }
+
+            $result = $contact;
+        }
+
+        return $result;
+    }
+
+    /**
+     * Returns the list of people whom this address book is shared with.
+     *
+     * Every element in this array should have the following properties:
+     *   * href - Often a mailto: address
+     *   * commonName - Optional, for example a first + last name
+     *   * status - See the Sabre\CalDAV\SharingPlugin::STATUS_ constants.
+     *   * readOnly - boolean
+     *   * summary - Optional, a description for the share
+     *
+     * @return array
+     */
+    public function getShares($addressBookId) {
+        return $this->sharingBackend->getShares($addressBookId);
+    }
+
+    /**
+     * update properties table
+     *
+     * @param int $addressBookId
+     * @param string $cardUri
+     * @param string $vCardSerialized
+     */
+    protected function updateProperties($addressBookId, $cardUri, $vCardSerialized) {
+        $cardId = $this->getCardId($addressBookId, $cardUri);
+        $vCard = $this->readCard($vCardSerialized);
+
+        $this->purgeProperties($addressBookId, $cardId);
+
+        $query = $this->db->getQueryBuilder();
+        $query->insert($this->dbCardsPropertiesTable)
+            ->values(
+                [
+                    'addressbookid' => $query->createNamedParameter($addressBookId),
+                    'cardid' => $query->createNamedParameter($cardId),
+                    'name' => $query->createParameter('name'),
+                    'value' => $query->createParameter('value'),
+                    'preferred' => $query->createParameter('preferred')
+                ]
+            );
+
+        foreach ($vCard->children() as $property) {
+            if (!in_array($property->name, self::$indexProperties)) {
+                continue;
+            }
+            $preferred = 0;
+            foreach ($property->parameters as $parameter) {
+                if ($parameter->name === 'TYPE' && strtoupper($parameter->getValue()) === 'PREF') {
+                    $preferred = 1;
+                    break;
+                }
+            }
+            $query->setParameter('name', $property->name);
+            $query->setParameter('value', mb_substr($property->getValue(), 0, 254));
+            $query->setParameter('preferred', $preferred);
+            $query->execute();
+        }
+    }
+
+    /**
+     * read vCard data into a vCard object
+     *
+     * @param string $cardData
+     * @return VCard
+     */
+    protected function readCard($cardData) {
+        return Reader::read($cardData);
+    }
+
+    /**
+     * delete all properties from a given card
+     *
+     * @param int $addressBookId
+     * @param int $cardId
+     */
+    protected function purgeProperties($addressBookId, $cardId) {
+        $query = $this->db->getQueryBuilder();
+        $query->delete($this->dbCardsPropertiesTable)
+            ->where($query->expr()->eq('cardid', $query->createNamedParameter($cardId)))
+            ->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
+        $query->execute();
+    }
+
+    /**
+     * get ID from a given contact
+     *
+     * @param int $addressBookId
+     * @param string $uri
+     * @return int
+     */
+    protected function getCardId($addressBookId, $uri) {
+        $query = $this->db->getQueryBuilder();
+        $query->select('id')->from($this->dbCardsTable)
+            ->where($query->expr()->eq('uri', $query->createNamedParameter($uri)))
+            ->andWhere($query->expr()->eq('addressbookid', $query->createNamedParameter($addressBookId)));
+
+        $result = $query->execute();
+        $cardIds = $result->fetch();
+        $result->closeCursor();
+
+        if (!isset($cardIds['id'])) {
+            throw new \InvalidArgumentException('Card does not exists: ' . $uri);
+        }
+
+        return (int)$cardIds['id'];
+    }
+
+    /**
+     * For shared address books the sharee is set in the ACL of the address book
+     *
+     * @param $addressBookId
+     * @param $acl
+     * @return array
+     */
+    public function applyShareAcl($addressBookId, $acl) {
+        return $this->sharingBackend->applyShareAcl($addressBookId, $acl);
+    }
+
+    private function convertPrincipal($principalUri, $toV2) {
+        if ($this->principalBackend->getPrincipalPrefix() === 'principals') {
+            list(, $name) = \Sabre\Uri\split($principalUri);
+            if ($toV2 === true) {
+                return "principals/users/$name";
+            }
+            return "principals/$name";
+        }
+        return $principalUri;
+    }
+
+    private function addOwnerPrincipal(&$addressbookInfo) {
+        $ownerPrincipalKey = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal';
+        $displaynameKey = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_NEXTCLOUD . '}owner-displayname';
+        if (isset($addressbookInfo[$ownerPrincipalKey])) {
+            $uri = $addressbookInfo[$ownerPrincipalKey];
+        } else {
+            $uri = $addressbookInfo['principaluri'];
+        }
+
+        $principalInformation = $this->principalBackend->getPrincipalByPath($uri);
+        if (isset($principalInformation['{DAV:}displayname'])) {
+            $addressbookInfo[$displaynameKey] = $principalInformation['{DAV:}displayname'];
+        }
+    }
+
+    /**
+     * Extract UID from vcard
+     *
+     * @param string $cardData the vcard raw data
+     * @return string the uid
+     * @throws BadRequest if no UID is available
+     */
+    private function getUID($cardData) {
+        if ($cardData != '') {
+            $vCard = Reader::read($cardData);
+            if ($vCard->UID) {
+                $uid = $vCard->UID->getValue();
+                return $uid;
+            }
+            // should already be handled, but just in case
+            throw new BadRequest('vCards on CardDAV servers MUST have a UID property');
+        }
+        // should already be handled, but just in case
+        throw new BadRequest('vCard can not be empty');
+    }
 }

Spacing +43 added lines, -43 removed lines

@@ -138,7 +138,7 @@ 
 			->from('addressbooks')
 			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)));
 
-		return (int)$query->execute()->fetchColumn();
+		return (int) $query->execute()->fetchColumn();
 	}
 
 	/**
@@ -175,7 +175,7 @@ 
 				'uri' => $row['uri'],
 				'principaluri' => $this->convertPrincipal($row['principaluri'], false),
 				'{DAV:}displayname' => $row['displayname'],
-				'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
+				'{'.Plugin::NS_CARDDAV.'}addressbook-description' => $row['description'],
 				'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
 				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
 			];
@@ -188,7 +188,7 @@ 
 		$principals = $this->principalBackend->getGroupMembership($principalUriOriginal, true);
 		$principals = array_merge($principals, $this->principalBackend->getCircleMembership($principalUriOriginal));
 
-		$principals = array_map(function ($principal) {
+		$principals = array_map(function($principal) {
 			return urldecode($principal);
 		}, $principals);
 		$principals[] = $principalUri;
@@ -203,13 +203,13 @@ 
 			->setParameter('principaluri', $principals, IQueryBuilder::PARAM_STR_ARRAY)
 			->execute();
 
-		$readOnlyPropertyName = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only';
+		$readOnlyPropertyName = '{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}read-only';
 		while ($row = $result->fetch()) {
 			if ($row['principaluri'] === $principalUri) {
 				continue;
 			}
 
-			$readOnly = (int)$row['access'] === Backend::ACCESS_READ;
+			$readOnly = (int) $row['access'] === Backend::ACCESS_READ;
 			if (isset($addressBooks[$row['id']])) {
 				if ($readOnly) {
 					// New share can not have more permissions then the old one.
@@ -223,18 +223,18 @@ 
 			}
 
 			list(, $name) = \Sabre\Uri\split($row['principaluri']);
-			$uri = $row['uri'] . '_shared_by_' . $name;
-			$displayName = $row['displayname'] . ' (' . $this->getUserDisplayName($name) . ')';
+			$uri = $row['uri'].'_shared_by_'.$name;
+			$displayName = $row['displayname'].' ('.$this->getUserDisplayName($name).')';
 
 			$addressBooks[$row['id']] = [
 				'id' => $row['id'],
 				'uri' => $uri,
 				'principaluri' => $principalUriOriginal,
 				'{DAV:}displayname' => $displayName,
-				'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
+				'{'.Plugin::NS_CARDDAV.'}addressbook-description' => $row['description'],
 				'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
 				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $row['principaluri'],
+				'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}owner-principal' => $row['principaluri'],
 				$readOnlyPropertyName => $readOnly,
 			];
 
@@ -261,7 +261,7 @@ 
 				'uri' => $row['uri'],
 				'principaluri' => $this->convertPrincipal($row['principaluri'], false),
 				'{DAV:}displayname' => $row['displayname'],
-				'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
+				'{'.Plugin::NS_CARDDAV.'}addressbook-description' => $row['description'],
 				'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
 				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
 			];
@@ -308,7 +308,7 @@ 
 			'uri' => $row['uri'],
 			'principaluri' => $row['principaluri'],
 			'{DAV:}displayname' => $row['displayname'],
-			'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
+			'{'.Plugin::NS_CARDDAV.'}addressbook-description' => $row['description'],
 			'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
 			'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
 		];
@@ -342,7 +342,7 @@ 
 			'uri' => $row['uri'],
 			'principaluri' => $row['principaluri'],
 			'{DAV:}displayname' => $row['displayname'],
-			'{' . Plugin::NS_CARDDAV . '}addressbook-description' => $row['description'],
+			'{'.Plugin::NS_CARDDAV.'}addressbook-description' => $row['description'],
 			'{http://calendarserver.org/ns/}getctag' => $row['synctoken'],
 			'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ?: '0',
 		];
@@ -371,17 +371,17 @@ 
 	public function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch) {
 		$supportedProperties = [
 			'{DAV:}displayname',
-			'{' . Plugin::NS_CARDDAV . '}addressbook-description',
+			'{'.Plugin::NS_CARDDAV.'}addressbook-description',
 		];
 
-		$propPatch->handle($supportedProperties, function ($mutations) use ($addressBookId) {
+		$propPatch->handle($supportedProperties, function($mutations) use ($addressBookId) {
 			$updates = [];
 			foreach ($mutations as $property => $newValue) {
 				switch ($property) {
 					case '{DAV:}displayname':
 						$updates['displayname'] = $newValue;
 						break;
-					case '{' . Plugin::NS_CARDDAV . '}addressbook-description':
+					case '{'.Plugin::NS_CARDDAV.'}addressbook-description':
 						$updates['description'] = $newValue;
 						break;
 				}
@@ -397,9 +397,9 @@ 
 
 			$this->addChange($addressBookId, "", 2);
 
-			$addressBookRow = $this->getAddressBookById((int)$addressBookId);
+			$addressBookRow = $this->getAddressBookById((int) $addressBookId);
 			$shares = $this->getShares($addressBookId);
-			$this->dispatcher->dispatchTyped(new AddressBookUpdatedEvent((int)$addressBookId, $addressBookRow, $shares, $mutations));
+			$this->dispatcher->dispatchTyped(new AddressBookUpdatedEvent((int) $addressBookId, $addressBookRow, $shares, $mutations));
 
 			return true;
 		});
@@ -428,11 +428,11 @@ 
 				case '{DAV:}displayname':
 					$values['displayname'] = $newValue;
 					break;
-				case '{' . Plugin::NS_CARDDAV . '}addressbook-description':
+				case '{'.Plugin::NS_CARDDAV.'}addressbook-description':
 					$values['description'] = $newValue;
 					break;
 				default:
-					throw new BadRequest('Unknown property: ' . $property);
+					throw new BadRequest('Unknown property: '.$property);
 			}
 		}
 
@@ -456,7 +456,7 @@ 
 
 		$addressBookId = $query->getLastInsertId();
 		$addressBookRow = $this->getAddressBookById($addressBookId);
-		$this->dispatcher->dispatchTyped(new AddressBookCreatedEvent((int)$addressBookId, $addressBookRow));
+		$this->dispatcher->dispatchTyped(new AddressBookCreatedEvent((int) $addressBookId, $addressBookRow));
 
 		return $addressBookId;
 	}
@@ -527,7 +527,7 @@ 
 
 		$result = $query->execute();
 		while ($row = $result->fetch()) {
-			$row['etag'] = '"' . $row['etag'] . '"';
+			$row['etag'] = '"'.$row['etag'].'"';
 
 			$modified = false;
 			$row['carddata'] = $this->readBlob($row['carddata'], $modified);
@@ -567,7 +567,7 @@ 
 		if (!$row) {
 			return false;
 		}
-		$row['etag'] = '"' . $row['etag'] . '"';
+		$row['etag'] = '"'.$row['etag'].'"';
 
 		$modified = false;
 		$row['carddata'] = $this->readBlob($row['carddata'], $modified);
@@ -609,7 +609,7 @@ 
 			$result = $query->execute();
 
 			while ($row = $result->fetch()) {
-				$row['etag'] = '"' . $row['etag'] . '"';
+				$row['etag'] = '"'.$row['etag'].'"';
 
 				$modified = false;
 				$row['carddata'] = $this->readBlob($row['carddata'], $modified);
@@ -660,7 +660,7 @@ 
 			->andWhere($q->expr()->eq('uid', $q->createNamedParameter($uid)))
 			->setMaxResults(1);
 		$result = $q->execute();
-		$count = (bool)$result->fetchColumn();
+		$count = (bool) $result->fetchColumn();
 		$result->closeCursor();
 		if ($count) {
 			throw new \Sabre\DAV\Exception\BadRequest('VCard object with uid already exists in this addressbook collection.');
@@ -688,14 +688,14 @@ 
 		$addressBookData = $this->getAddressBookById($addressBookId);
 		$shares = $this->getShares($addressBookId);
 		$objectRow = $this->getCard($addressBookId, $cardUri);
-		$this->dispatcher->dispatchTyped(new CardCreatedEvent((int)$addressBookId, $addressBookData, $shares, $objectRow));
+		$this->dispatcher->dispatchTyped(new CardCreatedEvent((int) $addressBookId, $addressBookData, $shares, $objectRow));
 		$this->legacyDispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::createCard',
 			new GenericEvent(null, [
 				'addressBookId' => $addressBookId,
 				'cardUri' => $cardUri,
 				'cardData' => $cardData]));
 
-		return '"' . $etag . '"';
+		return '"'.$etag.'"';
 	}
 
 	/**
@@ -731,7 +731,7 @@ 
 		// check for recently stored etag and stop if it is the same
 		$etagCacheKey = "$addressBookId#$cardUri";
 		if (isset($this->etagCache[$etagCacheKey]) && $this->etagCache[$etagCacheKey] === $etag) {
-			return '"' . $etag . '"';
+			return '"'.$etag.'"';
 		}
 
 		$query->update($this->dbCardsTable)
@@ -752,14 +752,14 @@ 
 		$addressBookData = $this->getAddressBookById($addressBookId);
 		$shares = $this->getShares($addressBookId);
 		$objectRow = $this->getCard($addressBookId, $cardUri);
-		$this->dispatcher->dispatchTyped(new CardUpdatedEvent((int)$addressBookId, $addressBookData, $shares, $objectRow));
+		$this->dispatcher->dispatchTyped(new CardUpdatedEvent((int) $addressBookId, $addressBookData, $shares, $objectRow));
 		$this->legacyDispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::updateCard',
 			new GenericEvent(null, [
 				'addressBookId' => $addressBookId,
 				'cardUri' => $cardUri,
 				'cardData' => $cardData]));
 
-		return '"' . $etag . '"';
+		return '"'.$etag.'"';
 	}
 
 	/**
@@ -789,7 +789,7 @@ 
 
 		if ($ret === 1) {
 			if ($cardId !== null) {
-				$this->dispatcher->dispatchTyped(new CardDeletedEvent((int)$addressBookId, $addressBookData, $shares, $objectRow));
+				$this->dispatcher->dispatchTyped(new CardDeletedEvent((int) $addressBookId, $addressBookData, $shares, $objectRow));
 				$this->legacyDispatcher->dispatch('\OCA\DAV\CardDAV\CardDavBackend::deleteCard',
 					new GenericEvent(null, [
 						'addressBookId' => $addressBookId,
@@ -879,7 +879,7 @@ 
 		if ($syncToken) {
 			$query = "SELECT `uri`, `operation` FROM `*PREFIX*addressbookchanges` WHERE `synctoken` >= ? AND `synctoken` < ? AND `addressbookid` = ? ORDER BY `synctoken`";
 			if ($limit > 0) {
-				$query .= " LIMIT " . (int)$limit;
+				$query .= " LIMIT ".(int) $limit;
 			}
 
 			// Fetching all changes
@@ -1022,7 +1022,7 @@ 
 									   string $pattern,
 									   array $searchProperties,
 									   array $options = []): array {
-		$addressBookIds = array_map(static function ($row):int {
+		$addressBookIds = array_map(static function($row):int {
 			return (int) $row['id'];
 		}, $this->getAddressBooksForUser($principalUri));
 
@@ -1044,7 +1044,7 @@ 
 
 		$query2 = $this->db->getQueryBuilder();
 
-		$addressBookOr =  $query2->expr()->orX();
+		$addressBookOr = $query2->expr()->orX();
 		foreach ($addressBookIds as $addressBookId) {
 			$addressBookOr->add($query2->expr()->eq('cp.addressbookid', $query2->createNamedParameter($addressBookId)));
 		}
@@ -1085,7 +1085,7 @@ 
 			if (!$escapePattern) {
 				$query2->andWhere($query2->expr()->ilike('cp.value', $query2->createNamedParameter($pattern)));
 			} else {
-				$query2->andWhere($query2->expr()->ilike('cp.value', $query2->createNamedParameter('%' . $this->db->escapeLikeParameter($pattern) . '%')));
+				$query2->andWhere($query2->expr()->ilike('cp.value', $query2->createNamedParameter('%'.$this->db->escapeLikeParameter($pattern).'%')));
 			}
 		}
 
@@ -1099,8 +1099,8 @@ 
 		$result = $query2->execute();
 		$matches = $result->fetchAll();
 		$result->closeCursor();
-		$matches = array_map(function ($match) {
-			return (int)$match['cardid'];
+		$matches = array_map(function($match) {
+			return (int) $match['cardid'];
 		}, $matches);
 
 		$query = $this->db->getQueryBuilder();
@@ -1113,7 +1113,7 @@ 
 
 		$result->closeCursor();
 
-		return array_map(function ($array) {
+		return array_map(function($array) {
 			$array['addressbookid'] = (int) $array['addressbookid'];
 			$modified = false;
 			$array['carddata'] = $this->readBlob($array['carddata'], $modified);
@@ -1160,7 +1160,7 @@ 
 		$result->closeCursor();
 
 		if (!isset($uri['uri'])) {
-			throw new \InvalidArgumentException('Card does not exists: ' . $id);
+			throw new \InvalidArgumentException('Card does not exists: '.$id);
 		}
 
 		return $uri['uri'];
@@ -1185,7 +1185,7 @@ 
 
 		if (is_array($contact)) {
 			$modified = false;
-			$contact['etag'] = '"' . $contact['etag'] . '"';
+			$contact['etag'] = '"'.$contact['etag'].'"';
 			$contact['carddata'] = $this->readBlob($contact['carddata'], $modified);
 			if ($modified) {
 				$contact['size'] = strlen($contact['carddata']);
@@ -1298,10 +1298,10 @@ 
 		$result->closeCursor();
 
 		if (!isset($cardIds['id'])) {
-			throw new \InvalidArgumentException('Card does not exists: ' . $uri);
+			throw new \InvalidArgumentException('Card does not exists: '.$uri);
 		}
 
-		return (int)$cardIds['id'];
+		return (int) $cardIds['id'];
 	}
 
 	/**
@@ -1327,8 +1327,8 @@ 
 	}
 
 	private function addOwnerPrincipal(&$addressbookInfo) {
-		$ownerPrincipalKey = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal';
-		$displaynameKey = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_NEXTCLOUD . '}owner-displayname';
+		$ownerPrincipalKey = '{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}owner-principal';
+		$displaynameKey = '{'.\OCA\DAV\DAV\Sharing\Plugin::NS_NEXTCLOUD.'}owner-displayname';
 		if (isset($addressbookInfo[$ownerPrincipalKey])) {
 			$uri = $addressbookInfo[$ownerPrincipalKey];
 		} else {

apps/dav/lib/CalDAV/CalDavBackend.php

Indentation +2705 added lines, -2705 removed lines

@@ -93,2709 +93,2709 @@
  * @package OCA\DAV\CalDAV
  */
 class CalDavBackend extends AbstractBackend implements SyncSupport, SubscriptionSupport, SchedulingSupport {
-	public const CALENDAR_TYPE_CALENDAR = 0;
-	public const CALENDAR_TYPE_SUBSCRIPTION = 1;
-
-	public const PERSONAL_CALENDAR_URI = 'personal';
-	public const PERSONAL_CALENDAR_NAME = 'Personal';
-
-	public const RESOURCE_BOOKING_CALENDAR_URI = 'calendar';
-	public const RESOURCE_BOOKING_CALENDAR_NAME = 'Calendar';
-
-	/**
-	 * We need to specify a max date, because we need to stop *somewhere*
-	 *
-	 * On 32 bit system the maximum for a signed integer is 2147483647, so
-	 * MAX_DATE cannot be higher than date('Y-m-d', 2147483647) which results
-	 * in 2038-01-19 to avoid problems when the date is converted
-	 * to a unix timestamp.
-	 */
-	public const MAX_DATE = '2038-01-01';
-
-	public const ACCESS_PUBLIC = 4;
-	public const CLASSIFICATION_PUBLIC = 0;
-	public const CLASSIFICATION_PRIVATE = 1;
-	public const CLASSIFICATION_CONFIDENTIAL = 2;
-
-	/**
-	 * List of CalDAV properties, and how they map to database field names
-	 * Add your own properties by simply adding on to this array.
-	 *
-	 * Note that only string-based properties are supported here.
-	 *
-	 * @var array
-	 */
-	public $propertyMap = [
-		'{DAV:}displayname'                          => 'displayname',
-		'{urn:ietf:params:xml:ns:caldav}calendar-description' => 'description',
-		'{urn:ietf:params:xml:ns:caldav}calendar-timezone'    => 'timezone',
-		'{http://apple.com/ns/ical/}calendar-order'  => 'calendarorder',
-		'{http://apple.com/ns/ical/}calendar-color'  => 'calendarcolor',
-	];
-
-	/**
-	 * List of subscription properties, and how they map to database field names.
-	 *
-	 * @var array
-	 */
-	public $subscriptionPropertyMap = [
-		'{DAV:}displayname'                                           => 'displayname',
-		'{http://apple.com/ns/ical/}refreshrate'                      => 'refreshrate',
-		'{http://apple.com/ns/ical/}calendar-order'                   => 'calendarorder',
-		'{http://apple.com/ns/ical/}calendar-color'                   => 'calendarcolor',
-		'{http://calendarserver.org/ns/}subscribed-strip-todos'       => 'striptodos',
-		'{http://calendarserver.org/ns/}subscribed-strip-alarms'      => 'stripalarms',
-		'{http://calendarserver.org/ns/}subscribed-strip-attachments' => 'stripattachments',
-	];
-
-	/** @var array properties to index */
-	public static $indexProperties = ['CATEGORIES', 'COMMENT', 'DESCRIPTION',
-		'LOCATION', 'RESOURCES', 'STATUS', 'SUMMARY', 'ATTENDEE', 'CONTACT',
-		'ORGANIZER'];
-
-	/** @var array parameters to index */
-	public static $indexParameters = [
-		'ATTENDEE' => ['CN'],
-		'ORGANIZER' => ['CN'],
-	];
-
-	/**
-	 * @var string[] Map of uid => display name
-	 */
-	protected $userDisplayNames;
-
-	/** @var IDBConnection */
-	private $db;
-
-	/** @var Backend */
-	private $calendarSharingBackend;
-
-	/** @var Principal */
-	private $principalBackend;
-
-	/** @var IUserManager */
-	private $userManager;
-
-	/** @var ISecureRandom */
-	private $random;
-
-	/** @var ILogger */
-	private $logger;
-
-	/** @var IEventDispatcher */
-	private $dispatcher;
-
-	/** @var EventDispatcherInterface */
-	private $legacyDispatcher;
-
-	/** @var bool */
-	private $legacyEndpoint;
-
-	/** @var string */
-	private $dbObjectPropertiesTable = 'calendarobjects_props';
-
-	/**
-	 * CalDavBackend constructor.
-	 *
-	 * @param IDBConnection $db
-	 * @param Principal $principalBackend
-	 * @param IUserManager $userManager
-	 * @param IGroupManager $groupManager
-	 * @param ISecureRandom $random
-	 * @param ILogger $logger
-	 * @param IEventDispatcher $dispatcher
-	 * @param EventDispatcherInterface $legacyDispatcher
-	 * @param bool $legacyEndpoint
-	 */
-	public function __construct(IDBConnection $db,
-								Principal $principalBackend,
-								IUserManager $userManager,
-								IGroupManager $groupManager,
-								ISecureRandom $random,
-								ILogger $logger,
-								IEventDispatcher $dispatcher,
-								EventDispatcherInterface $legacyDispatcher,
-								bool $legacyEndpoint = false) {
-		$this->db = $db;
-		$this->principalBackend = $principalBackend;
-		$this->userManager = $userManager;
-		$this->calendarSharingBackend = new Backend($this->db, $this->userManager, $groupManager, $principalBackend, 'calendar');
-		$this->random = $random;
-		$this->logger = $logger;
-		$this->dispatcher = $dispatcher;
-		$this->legacyDispatcher = $legacyDispatcher;
-		$this->legacyEndpoint = $legacyEndpoint;
-	}
-
-	/**
-	 * Return the number of calendars for a principal
-	 *
-	 * By default this excludes the automatically generated birthday calendar
-	 *
-	 * @param $principalUri
-	 * @param bool $excludeBirthday
-	 * @return int
-	 */
-	public function getCalendarsForUserCount($principalUri, $excludeBirthday = true) {
-		$principalUri = $this->convertPrincipal($principalUri, true);
-		$query = $this->db->getQueryBuilder();
-		$query->select($query->func()->count('*'))
-			->from('calendars')
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)));
-
-		if ($excludeBirthday) {
-			$query->andWhere($query->expr()->neq('uri', $query->createNamedParameter(BirthdayService::BIRTHDAY_CALENDAR_URI)));
-		}
-
-		return (int)$query->execute()->fetchColumn();
-	}
-
-	/**
-	 * Returns a list of calendars for a principal.
-	 *
-	 * Every project is an array with the following keys:
-	 *  * id, a unique id that will be used by other functions to modify the
-	 *    calendar. This can be the same as the uri or a database key.
-	 *  * uri, which the basename of the uri with which the calendar is
-	 *    accessed.
-	 *  * principaluri. The owner of the calendar. Almost always the same as
-	 *    principalUri passed to this method.
-	 *
-	 * Furthermore it can contain webdav properties in clark notation. A very
-	 * common one is '{DAV:}displayname'.
-	 *
-	 * Many clients also require:
-	 * {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
-	 * For this property, you can just return an instance of
-	 * Sabre\CalDAV\Property\SupportedCalendarComponentSet.
-	 *
-	 * If you return {http://sabredav.org/ns}read-only and set the value to 1,
-	 * ACL will automatically be put in read-only mode.
-	 *
-	 * @param string $principalUri
-	 * @return array
-	 */
-	public function getCalendarsForUser($principalUri) {
-		$principalUriOriginal = $principalUri;
-		$principalUri = $this->convertPrincipal($principalUri, true);
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'id';
-		$fields[] = 'uri';
-		$fields[] = 'synctoken';
-		$fields[] = 'components';
-		$fields[] = 'principaluri';
-		$fields[] = 'transparent';
-
-		// Making fields a comma-delimited list
-		$query = $this->db->getQueryBuilder();
-		$query->select($fields)->from('calendars')
-				->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
-				->orderBy('calendarorder', 'ASC');
-		$stmt = $query->execute();
-
-		$calendars = [];
-		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			$components = [];
-			if ($row['components']) {
-				$components = explode(',',$row['components']);
-			}
-
-			$calendar = [
-				'id' => $row['id'],
-				'uri' => $row['uri'],
-				'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
-			];
-
-			foreach ($this->propertyMap as $xmlName=>$dbName) {
-				$calendar[$xmlName] = $row[$dbName];
-			}
-
-			$this->addOwnerPrincipal($calendar);
-
-			if (!isset($calendars[$calendar['id']])) {
-				$calendars[$calendar['id']] = $calendar;
-			}
-		}
-
-		$stmt->closeCursor();
-
-		// query for shared calendars
-		$principals = $this->principalBackend->getGroupMembership($principalUriOriginal, true);
-		$principals = array_merge($principals, $this->principalBackend->getCircleMembership($principalUriOriginal));
-
-		$principals = array_map(function ($principal) {
-			return urldecode($principal);
-		}, $principals);
-		$principals[]= $principalUri;
-
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'a.id';
-		$fields[] = 'a.uri';
-		$fields[] = 'a.synctoken';
-		$fields[] = 'a.components';
-		$fields[] = 'a.principaluri';
-		$fields[] = 'a.transparent';
-		$fields[] = 's.access';
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select($fields)
-			->from('dav_shares', 's')
-			->join('s', 'calendars', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
-			->where($query->expr()->in('s.principaluri', $query->createParameter('principaluri')))
-			->andWhere($query->expr()->eq('s.type', $query->createParameter('type')))
-			->setParameter('type', 'calendar')
-			->setParameter('principaluri', $principals, \Doctrine\DBAL\Connection::PARAM_STR_ARRAY)
-			->execute();
-
-		$readOnlyPropertyName = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only';
-		while ($row = $result->fetch()) {
-			if ($row['principaluri'] === $principalUri) {
-				continue;
-			}
-
-			$readOnly = (int) $row['access'] === Backend::ACCESS_READ;
-			if (isset($calendars[$row['id']])) {
-				if ($readOnly) {
-					// New share can not have more permissions then the old one.
-					continue;
-				}
-				if (isset($calendars[$row['id']][$readOnlyPropertyName]) &&
-					$calendars[$row['id']][$readOnlyPropertyName] === 0) {
-					// Old share is already read-write, no more permissions can be gained
-					continue;
-				}
-			}
-
-			list(, $name) = Uri\split($row['principaluri']);
-			$uri = $row['uri'] . '_shared_by_' . $name;
-			$row['displayname'] = $row['displayname'] . ' (' . $this->getUserDisplayName($name) . ')';
-			$components = [];
-			if ($row['components']) {
-				$components = explode(',',$row['components']);
-			}
-			$calendar = [
-				'id' => $row['id'],
-				'uri' => $uri,
-				'principaluri' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp('transparent'),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				$readOnlyPropertyName => $readOnly,
-			];
-
-			foreach ($this->propertyMap as $xmlName=>$dbName) {
-				$calendar[$xmlName] = $row[$dbName];
-			}
-
-			$this->addOwnerPrincipal($calendar);
-
-			$calendars[$calendar['id']] = $calendar;
-		}
-		$result->closeCursor();
-
-		return array_values($calendars);
-	}
-
-	/**
-	 * @param $principalUri
-	 * @return array
-	 */
-	public function getUsersOwnCalendars($principalUri) {
-		$principalUri = $this->convertPrincipal($principalUri, true);
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'id';
-		$fields[] = 'uri';
-		$fields[] = 'synctoken';
-		$fields[] = 'components';
-		$fields[] = 'principaluri';
-		$fields[] = 'transparent';
-		// Making fields a comma-delimited list
-		$query = $this->db->getQueryBuilder();
-		$query->select($fields)->from('calendars')
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
-			->orderBy('calendarorder', 'ASC');
-		$stmt = $query->execute();
-		$calendars = [];
-		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			$components = [];
-			if ($row['components']) {
-				$components = explode(',',$row['components']);
-			}
-			$calendar = [
-				'id' => $row['id'],
-				'uri' => $row['uri'],
-				'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-			];
-			foreach ($this->propertyMap as $xmlName=>$dbName) {
-				$calendar[$xmlName] = $row[$dbName];
-			}
-
-			$this->addOwnerPrincipal($calendar);
-
-			if (!isset($calendars[$calendar['id']])) {
-				$calendars[$calendar['id']] = $calendar;
-			}
-		}
-		$stmt->closeCursor();
-		return array_values($calendars);
-	}
-
-
-	/**
-	 * @param $uid
-	 * @return string
-	 */
-	private function getUserDisplayName($uid) {
-		if (!isset($this->userDisplayNames[$uid])) {
-			$user = $this->userManager->get($uid);
-
-			if ($user instanceof IUser) {
-				$this->userDisplayNames[$uid] = $user->getDisplayName();
-			} else {
-				$this->userDisplayNames[$uid] = $uid;
-			}
-		}
-
-		return $this->userDisplayNames[$uid];
-	}
-
-	/**
-	 * @return array
-	 */
-	public function getPublicCalendars() {
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'a.id';
-		$fields[] = 'a.uri';
-		$fields[] = 'a.synctoken';
-		$fields[] = 'a.components';
-		$fields[] = 'a.principaluri';
-		$fields[] = 'a.transparent';
-		$fields[] = 's.access';
-		$fields[] = 's.publicuri';
-		$calendars = [];
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select($fields)
-			->from('dav_shares', 's')
-			->join('s', 'calendars', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
-			->where($query->expr()->in('s.access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
-			->andWhere($query->expr()->eq('s.type', $query->createNamedParameter('calendar')))
-			->execute();
-
-		while ($row = $result->fetch()) {
-			list(, $name) = Uri\split($row['principaluri']);
-			$row['displayname'] = $row['displayname'] . "($name)";
-			$components = [];
-			if ($row['components']) {
-				$components = explode(',',$row['components']);
-			}
-			$calendar = [
-				'id' => $row['id'],
-				'uri' => $row['publicuri'],
-				'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], $this->legacyEndpoint),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}public' => (int)$row['access'] === self::ACCESS_PUBLIC,
-			];
-
-			foreach ($this->propertyMap as $xmlName=>$dbName) {
-				$calendar[$xmlName] = $row[$dbName];
-			}
-
-			$this->addOwnerPrincipal($calendar);
-
-			if (!isset($calendars[$calendar['id']])) {
-				$calendars[$calendar['id']] = $calendar;
-			}
-		}
-		$result->closeCursor();
-
-		return array_values($calendars);
-	}
-
-	/**
-	 * @param string $uri
-	 * @return array
-	 * @throws NotFound
-	 */
-	public function getPublicCalendar($uri) {
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'a.id';
-		$fields[] = 'a.uri';
-		$fields[] = 'a.synctoken';
-		$fields[] = 'a.components';
-		$fields[] = 'a.principaluri';
-		$fields[] = 'a.transparent';
-		$fields[] = 's.access';
-		$fields[] = 's.publicuri';
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select($fields)
-			->from('dav_shares', 's')
-			->join('s', 'calendars', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
-			->where($query->expr()->in('s.access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
-			->andWhere($query->expr()->eq('s.type', $query->createNamedParameter('calendar')))
-			->andWhere($query->expr()->eq('s.publicuri', $query->createNamedParameter($uri)))
-			->execute();
-
-		$row = $result->fetch(\PDO::FETCH_ASSOC);
-
-		$result->closeCursor();
-
-		if ($row === false) {
-			throw new NotFound('Node with name \'' . $uri . '\' could not be found');
-		}
-
-		list(, $name) = Uri\split($row['principaluri']);
-		$row['displayname'] = $row['displayname'] . ' ' . "($name)";
-		$components = [];
-		if ($row['components']) {
-			$components = explode(',',$row['components']);
-		}
-		$calendar = [
-			'id' => $row['id'],
-			'uri' => $row['publicuri'],
-			'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-			'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-			'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
-			'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}public' => (int)$row['access'] === self::ACCESS_PUBLIC,
-		];
-
-		foreach ($this->propertyMap as $xmlName=>$dbName) {
-			$calendar[$xmlName] = $row[$dbName];
-		}
-
-		$this->addOwnerPrincipal($calendar);
-
-		return $calendar;
-	}
-
-	/**
-	 * @param string $principal
-	 * @param string $uri
-	 * @return array|null
-	 */
-	public function getCalendarByUri($principal, $uri) {
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'id';
-		$fields[] = 'uri';
-		$fields[] = 'synctoken';
-		$fields[] = 'components';
-		$fields[] = 'principaluri';
-		$fields[] = 'transparent';
-
-		// Making fields a comma-delimited list
-		$query = $this->db->getQueryBuilder();
-		$query->select($fields)->from('calendars')
-			->where($query->expr()->eq('uri', $query->createNamedParameter($uri)))
-			->andWhere($query->expr()->eq('principaluri', $query->createNamedParameter($principal)))
-			->setMaxResults(1);
-		$stmt = $query->execute();
-
-		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
-		$stmt->closeCursor();
-		if ($row === false) {
-			return null;
-		}
-
-		$components = [];
-		if ($row['components']) {
-			$components = explode(',',$row['components']);
-		}
-
-		$calendar = [
-			'id' => $row['id'],
-			'uri' => $row['uri'],
-			'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-			'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-		];
-
-		foreach ($this->propertyMap as $xmlName=>$dbName) {
-			$calendar[$xmlName] = $row[$dbName];
-		}
-
-		$this->addOwnerPrincipal($calendar);
-
-		return $calendar;
-	}
-
-	/**
-	 * @param $calendarId
-	 * @return array|null
-	 */
-	public function getCalendarById($calendarId) {
-		$fields = array_values($this->propertyMap);
-		$fields[] = 'id';
-		$fields[] = 'uri';
-		$fields[] = 'synctoken';
-		$fields[] = 'components';
-		$fields[] = 'principaluri';
-		$fields[] = 'transparent';
-
-		// Making fields a comma-delimited list
-		$query = $this->db->getQueryBuilder();
-		$query->select($fields)->from('calendars')
-			->where($query->expr()->eq('id', $query->createNamedParameter($calendarId)))
-			->setMaxResults(1);
-		$stmt = $query->execute();
-
-		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
-		$stmt->closeCursor();
-		if ($row === false) {
-			return null;
-		}
-
-		$components = [];
-		if ($row['components']) {
-			$components = explode(',',$row['components']);
-		}
-
-		$calendar = [
-			'id' => $row['id'],
-			'uri' => $row['uri'],
-			'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-			'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-		];
-
-		foreach ($this->propertyMap as $xmlName=>$dbName) {
-			$calendar[$xmlName] = $row[$dbName];
-		}
-
-		$this->addOwnerPrincipal($calendar);
-
-		return $calendar;
-	}
-
-	/**
-	 * @param $subscriptionId
-	 */
-	public function getSubscriptionById($subscriptionId) {
-		$fields = array_values($this->subscriptionPropertyMap);
-		$fields[] = 'id';
-		$fields[] = 'uri';
-		$fields[] = 'source';
-		$fields[] = 'synctoken';
-		$fields[] = 'principaluri';
-		$fields[] = 'lastmodified';
-
-		$query = $this->db->getQueryBuilder();
-		$query->select($fields)
-			->from('calendarsubscriptions')
-			->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
-			->orderBy('calendarorder', 'asc');
-		$stmt =$query->execute();
-
-		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
-		$stmt->closeCursor();
-		if ($row === false) {
-			return null;
-		}
-
-		$subscription = [
-			'id'           => $row['id'],
-			'uri'          => $row['uri'],
-			'principaluri' => $row['principaluri'],
-			'source'       => $row['source'],
-			'lastmodified' => $row['lastmodified'],
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-		];
-
-		foreach ($this->subscriptionPropertyMap as $xmlName=>$dbName) {
-			if (!is_null($row[$dbName])) {
-				$subscription[$xmlName] = $row[$dbName];
-			}
-		}
-
-		return $subscription;
-	}
-
-	/**
-	 * Creates a new calendar for a principal.
-	 *
-	 * If the creation was a success, an id must be returned that can be used to reference
-	 * this calendar in other methods, such as updateCalendar.
-	 *
-	 * @param string $principalUri
-	 * @param string $calendarUri
-	 * @param array $properties
-	 * @return int
-	 */
-	public function createCalendar($principalUri, $calendarUri, array $properties) {
-		$values = [
-			'principaluri' => $this->convertPrincipal($principalUri, true),
-			'uri'          => $calendarUri,
-			'synctoken'    => 1,
-			'transparent'  => 0,
-			'components'   => 'VEVENT,VTODO',
-			'displayname'  => $calendarUri
-		];
-
-		// Default value
-		$sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
-		if (isset($properties[$sccs])) {
-			if (!($properties[$sccs] instanceof SupportedCalendarComponentSet)) {
-				throw new DAV\Exception('The ' . $sccs . ' property must be of type: \Sabre\CalDAV\Property\SupportedCalendarComponentSet');
-			}
-			$values['components'] = implode(',',$properties[$sccs]->getValue());
-		} elseif (isset($properties['components'])) {
-			// Allow to provide components internally without having
-			// to create a SupportedCalendarComponentSet object
-			$values['components'] = $properties['components'];
-		}
-
-		$transp = '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp';
-		if (isset($properties[$transp])) {
-			$values['transparent'] = (int) ($properties[$transp]->getValue() === 'transparent');
-		}
-
-		foreach ($this->propertyMap as $xmlName=>$dbName) {
-			if (isset($properties[$xmlName])) {
-				$values[$dbName] = $properties[$xmlName];
-			}
-		}
-
-		$query = $this->db->getQueryBuilder();
-		$query->insert('calendars');
-		foreach ($values as $column => $value) {
-			$query->setValue($column, $query->createNamedParameter($value));
-		}
-		$query->execute();
-		$calendarId = $query->getLastInsertId();
-
-		$calendarData = $this->getCalendarById($calendarId);
-		$this->dispatcher->dispatchTyped(new CalendarCreatedEvent((int)$calendarId, $calendarData));
-		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendar', new GenericEvent(
-			'\OCA\DAV\CalDAV\CalDavBackend::createCalendar',
-			[
-				'calendarId' => $calendarId,
-				'calendarData' => $calendarData,
-			]));
-
-		return $calendarId;
-	}
-
-	/**
-	 * Updates properties for a calendar.
-	 *
-	 * The list of mutations is stored in a Sabre\DAV\PropPatch object.
-	 * To do the actual updates, you must tell this object which properties
-	 * you're going to process with the handle() method.
-	 *
-	 * Calling the handle method is like telling the PropPatch object "I
-	 * promise I can handle updating this property".
-	 *
-	 * Read the PropPatch documentation for more info and examples.
-	 *
-	 * @param mixed $calendarId
-	 * @param PropPatch $propPatch
-	 * @return void
-	 */
-	public function updateCalendar($calendarId, PropPatch $propPatch) {
-		$supportedProperties = array_keys($this->propertyMap);
-		$supportedProperties[] = '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp';
-
-		$propPatch->handle($supportedProperties, function ($mutations) use ($calendarId) {
-			$newValues = [];
-			foreach ($mutations as $propertyName => $propertyValue) {
-				switch ($propertyName) {
-					case '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp':
-						$fieldName = 'transparent';
-						$newValues[$fieldName] = (int) ($propertyValue->getValue() === 'transparent');
-						break;
-					default:
-						$fieldName = $this->propertyMap[$propertyName];
-						$newValues[$fieldName] = $propertyValue;
-						break;
-				}
-			}
-			$query = $this->db->getQueryBuilder();
-			$query->update('calendars');
-			foreach ($newValues as $fieldName => $value) {
-				$query->set($fieldName, $query->createNamedParameter($value));
-			}
-			$query->where($query->expr()->eq('id', $query->createNamedParameter($calendarId)));
-			$query->execute();
-
-			$this->addChange($calendarId, "", 2);
-
-			$calendarData = $this->getCalendarById($calendarId);
-			$shares = $this->getShares($calendarId);
-			$this->dispatcher->dispatchTyped(new CalendarUpdatedEvent((int)$calendarId, $calendarData, $shares, $mutations));
-			$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendar', new GenericEvent(
-				'\OCA\DAV\CalDAV\CalDavBackend::updateCalendar',
-				[
-					'calendarId' => $calendarId,
-					'calendarData' => $calendarData,
-					'shares' => $shares,
-					'propertyMutations' => $mutations,
-				]));
-
-			return true;
-		});
-	}
-
-	/**
-	 * Delete a calendar and all it's objects
-	 *
-	 * @param mixed $calendarId
-	 * @return void
-	 */
-	public function deleteCalendar($calendarId) {
-		$calendarData = $this->getCalendarById($calendarId);
-		$shares = $this->getShares($calendarId);
-
-		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar', new GenericEvent(
-			'\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar',
-			[
-				'calendarId' => $calendarId,
-				'calendarData' => $calendarData,
-				'shares' => $shares,
-			]));
-
-		$stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ? AND `calendartype` = ?');
-		$stmt->execute([$calendarId, self::CALENDAR_TYPE_CALENDAR]);
-
-		$stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendars` WHERE `id` = ?');
-		$stmt->execute([$calendarId]);
-
-		$stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarchanges` WHERE `calendarid` = ? AND `calendartype` = ?');
-		$stmt->execute([$calendarId, self::CALENDAR_TYPE_CALENDAR]);
-
-		$this->calendarSharingBackend->deleteAllShares($calendarId);
-
-		$query = $this->db->getQueryBuilder();
-		$query->delete($this->dbObjectPropertiesTable)
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)))
-			->execute();
-
-		if ($calendarData) {
-			$this->dispatcher->dispatchTyped(new CalendarDeletedEvent((int)$calendarId, $calendarData, $shares));
-		}
-	}
-
-	/**
-	 * Delete all of an user's shares
-	 *
-	 * @param string $principaluri
-	 * @return void
-	 */
-	public function deleteAllSharesByUser($principaluri) {
-		$this->calendarSharingBackend->deleteAllSharesByUser($principaluri);
-	}
-
-	/**
-	 * Returns all calendar objects within a calendar.
-	 *
-	 * Every item contains an array with the following keys:
-	 *   * calendardata - The iCalendar-compatible calendar data
-	 *   * uri - a unique key which will be used to construct the uri. This can
-	 *     be any arbitrary string, but making sure it ends with '.ics' is a
-	 *     good idea. This is only the basename, or filename, not the full
-	 *     path.
-	 *   * lastmodified - a timestamp of the last modification time
-	 *   * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
-	 *   '"abcdef"')
-	 *   * size - The size of the calendar objects, in bytes.
-	 *   * component - optional, a string containing the type of object, such
-	 *     as 'vevent' or 'vtodo'. If specified, this will be used to populate
-	 *     the Content-Type header.
-	 *
-	 * Note that the etag is optional, but it's highly encouraged to return for
-	 * speed reasons.
-	 *
-	 * The calendardata is also optional. If it's not returned
-	 * 'getCalendarObject' will be called later, which *is* expected to return
-	 * calendardata.
-	 *
-	 * If neither etag or size are specified, the calendardata will be
-	 * used/fetched to determine these numbers. If both are specified the
-	 * amount of times this is needed is reduced by a great degree.
-	 *
-	 * @param mixed $calendarId
-	 * @param int $calendarType
-	 * @return array
-	 */
-	public function getCalendarObjects($calendarId, $calendarType=self::CALENDAR_TYPE_CALENDAR):array {
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'componenttype', 'classification'])
-			->from('calendarobjects')
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter($calendarType)));
-		$stmt = $query->execute();
-
-		$result = [];
-		foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
-			$result[] = [
-				'id'           => $row['id'],
-				'uri'          => $row['uri'],
-				'lastmodified' => $row['lastmodified'],
-				'etag'         => '"' . $row['etag'] . '"',
-				'calendarid'   => $row['calendarid'],
-				'size'         => (int)$row['size'],
-				'component'    => strtolower($row['componenttype']),
-				'classification'=> (int)$row['classification']
-			];
-		}
-
-		return $result;
-	}
-
-	/**
-	 * Returns information from a single calendar object, based on it's object
-	 * uri.
-	 *
-	 * The object uri is only the basename, or filename and not a full path.
-	 *
-	 * The returned array must have the same keys as getCalendarObjects. The
-	 * 'calendardata' object is required here though, while it's not required
-	 * for getCalendarObjects.
-	 *
-	 * This method must return null if the object did not exist.
-	 *
-	 * @param mixed $calendarId
-	 * @param string $objectUri
-	 * @param int $calendarType
-	 * @return array|null
-	 */
-	public function getCalendarObject($calendarId, $objectUri, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'calendardata', 'componenttype', 'classification'])
-			->from('calendarobjects')
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
-			->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter($calendarType)));
-		$stmt = $query->execute();
-		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
-
-		if (!$row) {
-			return null;
-		}
-
-		return [
-			'id'            => $row['id'],
-			'uri'           => $row['uri'],
-			'lastmodified'  => $row['lastmodified'],
-			'etag'          => '"' . $row['etag'] . '"',
-			'calendarid'    => $row['calendarid'],
-			'size'          => (int)$row['size'],
-			'calendardata'  => $this->readBlob($row['calendardata']),
-			'component'     => strtolower($row['componenttype']),
-			'classification'=> (int)$row['classification']
-		];
-	}
-
-	/**
-	 * Returns a list of calendar objects.
-	 *
-	 * This method should work identical to getCalendarObject, but instead
-	 * return all the calendar objects in the list as an array.
-	 *
-	 * If the backend supports this, it may allow for some speed-ups.
-	 *
-	 * @param mixed $calendarId
-	 * @param string[] $uris
-	 * @param int $calendarType
-	 * @return array
-	 */
-	public function getMultipleCalendarObjects($calendarId, array $uris, $calendarType=self::CALENDAR_TYPE_CALENDAR):array {
-		if (empty($uris)) {
-			return [];
-		}
-
-		$chunks = array_chunk($uris, 100);
-		$objects = [];
-
-		$query = $this->db->getQueryBuilder();
-		$query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'calendardata', 'componenttype', 'classification'])
-			->from('calendarobjects')
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
-			->andWhere($query->expr()->in('uri', $query->createParameter('uri')))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter($calendarType)));
-
-		foreach ($chunks as $uris) {
-			$query->setParameter('uri', $uris, IQueryBuilder::PARAM_STR_ARRAY);
-			$result = $query->execute();
-
-			while ($row = $result->fetch()) {
-				$objects[] = [
-					'id'           => $row['id'],
-					'uri'          => $row['uri'],
-					'lastmodified' => $row['lastmodified'],
-					'etag'         => '"' . $row['etag'] . '"',
-					'calendarid'   => $row['calendarid'],
-					'size'         => (int)$row['size'],
-					'calendardata' => $this->readBlob($row['calendardata']),
-					'component'    => strtolower($row['componenttype']),
-					'classification' => (int)$row['classification']
-				];
-			}
-			$result->closeCursor();
-		}
-
-		return $objects;
-	}
-
-	/**
-	 * Creates a new calendar object.
-	 *
-	 * The object uri is only the basename, or filename and not a full path.
-	 *
-	 * It is possible return an etag from this function, which will be used in
-	 * the response to this PUT request. Note that the ETag must be surrounded
-	 * by double-quotes.
-	 *
-	 * However, you should only really return this ETag if you don't mangle the
-	 * calendar-data. If the result of a subsequent GET to this object is not
-	 * the exact same as this request body, you should omit the ETag.
-	 *
-	 * @param mixed $calendarId
-	 * @param string $objectUri
-	 * @param string $calendarData
-	 * @param int $calendarType
-	 * @return string
-	 */
-	public function createCalendarObject($calendarId, $objectUri, $calendarData, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
-		$extraData = $this->getDenormalizedData($calendarData);
-
-		$q = $this->db->getQueryBuilder();
-		$q->select($q->func()->count('*'))
-			->from('calendarobjects')
-			->where($q->expr()->eq('calendarid', $q->createNamedParameter($calendarId)))
-			->andWhere($q->expr()->eq('uid', $q->createNamedParameter($extraData['uid'])))
-			->andWhere($q->expr()->eq('calendartype', $q->createNamedParameter($calendarType)));
-
-		$result = $q->execute();
-		$count = (int) $result->fetchColumn();
-		$result->closeCursor();
-
-		if ($count !== 0) {
-			throw new \Sabre\DAV\Exception\BadRequest('Calendar object with uid already exists in this calendar collection.');
-		}
-
-		$query = $this->db->getQueryBuilder();
-		$query->insert('calendarobjects')
-			->values([
-				'calendarid' => $query->createNamedParameter($calendarId),
-				'uri' => $query->createNamedParameter($objectUri),
-				'calendardata' => $query->createNamedParameter($calendarData, IQueryBuilder::PARAM_LOB),
-				'lastmodified' => $query->createNamedParameter(time()),
-				'etag' => $query->createNamedParameter($extraData['etag']),
-				'size' => $query->createNamedParameter($extraData['size']),
-				'componenttype' => $query->createNamedParameter($extraData['componentType']),
-				'firstoccurence' => $query->createNamedParameter($extraData['firstOccurence']),
-				'lastoccurence' => $query->createNamedParameter($extraData['lastOccurence']),
-				'classification' => $query->createNamedParameter($extraData['classification']),
-				'uid' => $query->createNamedParameter($extraData['uid']),
-				'calendartype' => $query->createNamedParameter($calendarType),
-			])
-			->execute();
-
-		$this->updateProperties($calendarId, $objectUri, $calendarData, $calendarType);
-		$this->addChange($calendarId, $objectUri, 1, $calendarType);
-
-		$objectRow = $this->getCalendarObject($calendarId, $objectUri, $calendarType);
-		if ($calendarType === self::CALENDAR_TYPE_CALENDAR) {
-			$calendarRow = $this->getCalendarById($calendarId);
-			$shares = $this->getShares($calendarId);
-
-			$this->dispatcher->dispatchTyped(new CalendarObjectCreatedEvent((int)$calendarId, $calendarRow, $shares, $objectRow));
-			$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject', new GenericEvent(
-				'\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject',
-				[
-					'calendarId' => $calendarId,
-					'calendarData' => $calendarRow,
-					'shares' => $shares,
-					'objectData' => $objectRow,
-				]
-			));
-		} else {
-			$subscriptionRow = $this->getSubscriptionById($calendarId);
-
-			$this->dispatcher->dispatchTyped(new CachedCalendarObjectCreatedEvent((int)$calendarId, $subscriptionRow, [], $objectRow));
-			$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCachedCalendarObject', new GenericEvent(
-				'\OCA\DAV\CalDAV\CalDavBackend::createCachedCalendarObject',
-				[
-					'subscriptionId' => $calendarId,
-					'calendarData' => $subscriptionRow,
-					'shares' => [],
-					'objectData' => $objectRow,
-				]
-			));
-		}
-
-		return '"' . $extraData['etag'] . '"';
-	}
-
-	/**
-	 * Updates an existing calendarobject, based on it's uri.
-	 *
-	 * The object uri is only the basename, or filename and not a full path.
-	 *
-	 * It is possible return an etag from this function, which will be used in
-	 * the response to this PUT request. Note that the ETag must be surrounded
-	 * by double-quotes.
-	 *
-	 * However, you should only really return this ETag if you don't mangle the
-	 * calendar-data. If the result of a subsequent GET to this object is not
-	 * the exact same as this request body, you should omit the ETag.
-	 *
-	 * @param mixed $calendarId
-	 * @param string $objectUri
-	 * @param string $calendarData
-	 * @param int $calendarType
-	 * @return string
-	 */
-	public function updateCalendarObject($calendarId, $objectUri, $calendarData, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
-		$extraData = $this->getDenormalizedData($calendarData);
-		$query = $this->db->getQueryBuilder();
-		$query->update('calendarobjects')
-				->set('calendardata', $query->createNamedParameter($calendarData, IQueryBuilder::PARAM_LOB))
-				->set('lastmodified', $query->createNamedParameter(time()))
-				->set('etag', $query->createNamedParameter($extraData['etag']))
-				->set('size', $query->createNamedParameter($extraData['size']))
-				->set('componenttype', $query->createNamedParameter($extraData['componentType']))
-				->set('firstoccurence', $query->createNamedParameter($extraData['firstOccurence']))
-				->set('lastoccurence', $query->createNamedParameter($extraData['lastOccurence']))
-				->set('classification', $query->createNamedParameter($extraData['classification']))
-				->set('uid', $query->createNamedParameter($extraData['uid']))
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
-			->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter($calendarType)))
-			->execute();
-
-		$this->updateProperties($calendarId, $objectUri, $calendarData, $calendarType);
-		$this->addChange($calendarId, $objectUri, 2, $calendarType);
-
-		$objectRow = $this->getCalendarObject($calendarId, $objectUri, $calendarType);
-		if (is_array($objectRow)) {
-			if ($calendarType === self::CALENDAR_TYPE_CALENDAR) {
-				$calendarRow = $this->getCalendarById($calendarId);
-				$shares = $this->getShares($calendarId);
-
-				$this->dispatcher->dispatchTyped(new CalendarObjectUpdatedEvent((int)$calendarId, $calendarRow, $shares, $objectRow));
-				$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject', new GenericEvent(
-					'\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject',
-					[
-						'calendarId' => $calendarId,
-						'calendarData' => $calendarRow,
-						'shares' => $shares,
-						'objectData' => $objectRow,
-					]
-				));
-			} else {
-				$subscriptionRow = $this->getSubscriptionById($calendarId);
-
-				$this->dispatcher->dispatchTyped(new CachedCalendarObjectUpdatedEvent((int)$calendarId, $subscriptionRow, [], $objectRow));
-				$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCachedCalendarObject', new GenericEvent(
-					'\OCA\DAV\CalDAV\CalDavBackend::updateCachedCalendarObject',
-					[
-						'subscriptionId' => $calendarId,
-						'calendarData' => $subscriptionRow,
-						'shares' => [],
-						'objectData' => $objectRow,
-					]
-				));
-			}
-		}
-
-		return '"' . $extraData['etag'] . '"';
-	}
-
-	/**
-	 * @param int $calendarObjectId
-	 * @param int $classification
-	 */
-	public function setClassification($calendarObjectId, $classification) {
-		if (!in_array($classification, [
-			self::CLASSIFICATION_PUBLIC, self::CLASSIFICATION_PRIVATE, self::CLASSIFICATION_CONFIDENTIAL
-		])) {
-			throw new \InvalidArgumentException();
-		}
-		$query = $this->db->getQueryBuilder();
-		$query->update('calendarobjects')
-			->set('classification', $query->createNamedParameter($classification))
-			->where($query->expr()->eq('id', $query->createNamedParameter($calendarObjectId)))
-			->execute();
-	}
-
-	/**
-	 * Deletes an existing calendar object.
-	 *
-	 * The object uri is only the basename, or filename and not a full path.
-	 *
-	 * @param mixed $calendarId
-	 * @param string $objectUri
-	 * @param int $calendarType
-	 * @return void
-	 */
-	public function deleteCalendarObject($calendarId, $objectUri, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
-		$data = $this->getCalendarObject($calendarId, $objectUri, $calendarType);
-		if (is_array($data)) {
-			if ($calendarType === self::CALENDAR_TYPE_CALENDAR) {
-				$calendarRow = $this->getCalendarById($calendarId);
-				$shares = $this->getShares($calendarId);
-
-				$this->dispatcher->dispatchTyped(new CalendarObjectDeletedEvent((int)$calendarId, $calendarRow, $shares, $data));
-				$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject', new GenericEvent(
-					'\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject',
-					[
-						'calendarId' => $calendarId,
-						'calendarData' => $calendarRow,
-						'shares' => $shares,
-						'objectData' => $data,
-					]
-				));
-			} else {
-				$subscriptionRow = $this->getSubscriptionById($calendarId);
-
-				$this->dispatcher->dispatchTyped(new CachedCalendarObjectDeletedEvent((int)$calendarId, $subscriptionRow, [], $data));
-				$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCachedCalendarObject', new GenericEvent(
-					'\OCA\DAV\CalDAV\CalDavBackend::deleteCachedCalendarObject',
-					[
-						'subscriptionId' => $calendarId,
-						'calendarData' => $subscriptionRow,
-						'shares' => [],
-						'objectData' => $data,
-					]
-				));
-			}
-		}
-
-		$stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ? AND `uri` = ? AND `calendartype` = ?');
-		$stmt->execute([$calendarId, $objectUri, $calendarType]);
-
-		if (is_array($data)) {
-			$this->purgeProperties($calendarId, $data['id'], $calendarType);
-		}
-
-		$this->addChange($calendarId, $objectUri, 3, $calendarType);
-	}
-
-	/**
-	 * Performs a calendar-query on the contents of this calendar.
-	 *
-	 * The calendar-query is defined in RFC4791 : CalDAV. Using the
-	 * calendar-query it is possible for a client to request a specific set of
-	 * object, based on contents of iCalendar properties, date-ranges and
-	 * iCalendar component types (VTODO, VEVENT).
-	 *
-	 * This method should just return a list of (relative) urls that match this
-	 * query.
-	 *
-	 * The list of filters are specified as an array. The exact array is
-	 * documented by Sabre\CalDAV\CalendarQueryParser.
-	 *
-	 * Note that it is extremely likely that getCalendarObject for every path
-	 * returned from this method will be called almost immediately after. You
-	 * may want to anticipate this to speed up these requests.
-	 *
-	 * This method provides a default implementation, which parses *all* the
-	 * iCalendar objects in the specified calendar.
-	 *
-	 * This default may well be good enough for personal use, and calendars
-	 * that aren't very large. But if you anticipate high usage, big calendars
-	 * or high loads, you are strongly advised to optimize certain paths.
-	 *
-	 * The best way to do so is override this method and to optimize
-	 * specifically for 'common filters'.
-	 *
-	 * Requests that are extremely common are:
-	 *   * requests for just VEVENTS
-	 *   * requests for just VTODO
-	 *   * requests with a time-range-filter on either VEVENT or VTODO.
-	 *
-	 * ..and combinations of these requests. It may not be worth it to try to
-	 * handle every possible situation and just rely on the (relatively
-	 * easy to use) CalendarQueryValidator to handle the rest.
-	 *
-	 * Note that especially time-range-filters may be difficult to parse. A
-	 * time-range filter specified on a VEVENT must for instance also handle
-	 * recurrence rules correctly.
-	 * A good example of how to interprete all these filters can also simply
-	 * be found in Sabre\CalDAV\CalendarQueryFilter. This class is as correct
-	 * as possible, so it gives you a good idea on what type of stuff you need
-	 * to think of.
-	 *
-	 * @param mixed $calendarId
-	 * @param array $filters
-	 * @param int $calendarType
-	 * @return array
-	 */
-	public function calendarQuery($calendarId, array $filters, $calendarType=self::CALENDAR_TYPE_CALENDAR):array {
-		$componentType = null;
-		$requirePostFilter = true;
-		$timeRange = null;
-
-		// if no filters were specified, we don't need to filter after a query
-		if (!$filters['prop-filters'] && !$filters['comp-filters']) {
-			$requirePostFilter = false;
-		}
-
-		// Figuring out if there's a component filter
-		if (count($filters['comp-filters']) > 0 && !$filters['comp-filters'][0]['is-not-defined']) {
-			$componentType = $filters['comp-filters'][0]['name'];
-
-			// Checking if we need post-filters
-			if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['time-range'] && !$filters['comp-filters'][0]['prop-filters']) {
-				$requirePostFilter = false;
-			}
-			// There was a time-range filter
-			if ($componentType === 'VEVENT' && isset($filters['comp-filters'][0]['time-range'])) {
-				$timeRange = $filters['comp-filters'][0]['time-range'];
-
-				// If start time OR the end time is not specified, we can do a
-				// 100% accurate mysql query.
-				if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['prop-filters'] && (!$timeRange['start'] || !$timeRange['end'])) {
-					$requirePostFilter = false;
-				}
-			}
-		}
-		$columns = ['uri'];
-		if ($requirePostFilter) {
-			$columns = ['uri', 'calendardata'];
-		}
-		$query = $this->db->getQueryBuilder();
-		$query->select($columns)
-			->from('calendarobjects')
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter($calendarType)));
-
-		if ($componentType) {
-			$query->andWhere($query->expr()->eq('componenttype', $query->createNamedParameter($componentType)));
-		}
-
-		if ($timeRange && $timeRange['start']) {
-			$query->andWhere($query->expr()->gt('lastoccurence', $query->createNamedParameter($timeRange['start']->getTimeStamp())));
-		}
-		if ($timeRange && $timeRange['end']) {
-			$query->andWhere($query->expr()->lt('firstoccurence', $query->createNamedParameter($timeRange['end']->getTimeStamp())));
-		}
-
-		$stmt = $query->execute();
-
-		$result = [];
-		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			if ($requirePostFilter) {
-				// validateFilterForObject will parse the calendar data
-				// catch parsing errors
-				try {
-					$matches = $this->validateFilterForObject($row, $filters);
-				} catch (ParseException $ex) {
-					$this->logger->logException($ex, [
-						'app' => 'dav',
-						'message' => 'Caught parsing exception for calendar data. This usually indicates invalid calendar data. calendar-id:'.$calendarId.' uri:'.$row['uri']
-					]);
-					continue;
-				} catch (InvalidDataException $ex) {
-					$this->logger->logException($ex, [
-						'app' => 'dav',
-						'message' => 'Caught invalid data exception for calendar data. This usually indicates invalid calendar data. calendar-id:'.$calendarId.' uri:'.$row['uri']
-					]);
-					continue;
-				}
-
-				if (!$matches) {
-					continue;
-				}
-			}
-			$result[] = $row['uri'];
-		}
-
-		return $result;
-	}
-
-	/**
-	 * custom Nextcloud search extension for CalDAV
-	 *
-	 * TODO - this should optionally cover cached calendar objects as well
-	 *
-	 * @param string $principalUri
-	 * @param array $filters
-	 * @param integer|null $limit
-	 * @param integer|null $offset
-	 * @return array
-	 */
-	public function calendarSearch($principalUri, array $filters, $limit=null, $offset=null) {
-		$calendars = $this->getCalendarsForUser($principalUri);
-		$ownCalendars = [];
-		$sharedCalendars = [];
-
-		$uriMapper = [];
-
-		foreach ($calendars as $calendar) {
-			if ($calendar['{http://owncloud.org/ns}owner-principal'] === $principalUri) {
-				$ownCalendars[] = $calendar['id'];
-			} else {
-				$sharedCalendars[] = $calendar['id'];
-			}
-			$uriMapper[$calendar['id']] = $calendar['uri'];
-		}
-		if (count($ownCalendars) === 0 && count($sharedCalendars) === 0) {
-			return [];
-		}
-
-		$query = $this->db->getQueryBuilder();
-		// Calendar id expressions
-		$calendarExpressions = [];
-		foreach ($ownCalendars as $id) {
-			$calendarExpressions[] = $query->expr()->andX(
-				$query->expr()->eq('c.calendarid',
-					$query->createNamedParameter($id)),
-				$query->expr()->eq('c.calendartype',
-						$query->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)));
-		}
-		foreach ($sharedCalendars as $id) {
-			$calendarExpressions[] = $query->expr()->andX(
-				$query->expr()->eq('c.calendarid',
-					$query->createNamedParameter($id)),
-				$query->expr()->eq('c.classification',
-					$query->createNamedParameter(self::CLASSIFICATION_PUBLIC)),
-				$query->expr()->eq('c.calendartype',
-					$query->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)));
-		}
-
-		if (count($calendarExpressions) === 1) {
-			$calExpr = $calendarExpressions[0];
-		} else {
-			$calExpr = call_user_func_array([$query->expr(), 'orX'], $calendarExpressions);
-		}
-
-		// Component expressions
-		$compExpressions = [];
-		foreach ($filters['comps'] as $comp) {
-			$compExpressions[] = $query->expr()
-				->eq('c.componenttype', $query->createNamedParameter($comp));
-		}
-
-		if (count($compExpressions) === 1) {
-			$compExpr = $compExpressions[0];
-		} else {
-			$compExpr = call_user_func_array([$query->expr(), 'orX'], $compExpressions);
-		}
-
-		if (!isset($filters['props'])) {
-			$filters['props'] = [];
-		}
-		if (!isset($filters['params'])) {
-			$filters['params'] = [];
-		}
-
-		$propParamExpressions = [];
-		foreach ($filters['props'] as $prop) {
-			$propParamExpressions[] = $query->expr()->andX(
-				$query->expr()->eq('i.name', $query->createNamedParameter($prop)),
-				$query->expr()->isNull('i.parameter')
-			);
-		}
-		foreach ($filters['params'] as $param) {
-			$propParamExpressions[] = $query->expr()->andX(
-				$query->expr()->eq('i.name', $query->createNamedParameter($param['property'])),
-				$query->expr()->eq('i.parameter', $query->createNamedParameter($param['parameter']))
-			);
-		}
-
-		if (count($propParamExpressions) === 1) {
-			$propParamExpr = $propParamExpressions[0];
-		} else {
-			$propParamExpr = call_user_func_array([$query->expr(), 'orX'], $propParamExpressions);
-		}
-
-		$query->select(['c.calendarid', 'c.uri'])
-			->from($this->dbObjectPropertiesTable, 'i')
-			->join('i', 'calendarobjects', 'c', $query->expr()->eq('i.objectid', 'c.id'))
-			->where($calExpr)
-			->andWhere($compExpr)
-			->andWhere($propParamExpr)
-			->andWhere($query->expr()->iLike('i.value',
-				$query->createNamedParameter('%'.$this->db->escapeLikeParameter($filters['search-term']).'%')));
-
-		if ($offset) {
-			$query->setFirstResult($offset);
-		}
-		if ($limit) {
-			$query->setMaxResults($limit);
-		}
-
-		$stmt = $query->execute();
-
-		$result = [];
-		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			$path = $uriMapper[$row['calendarid']] . '/' . $row['uri'];
-			if (!in_array($path, $result)) {
-				$result[] = $path;
-			}
-		}
-
-		return $result;
-	}
-
-	/**
-	 * used for Nextcloud's calendar API
-	 *
-	 * @param array $calendarInfo
-	 * @param string $pattern
-	 * @param array $searchProperties
-	 * @param array $options
-	 * @param integer|null $limit
-	 * @param integer|null $offset
-	 *
-	 * @return array
-	 */
-	public function search(array $calendarInfo, $pattern, array $searchProperties,
-						   array $options, $limit, $offset) {
-		$outerQuery = $this->db->getQueryBuilder();
-		$innerQuery = $this->db->getQueryBuilder();
-
-		$innerQuery->selectDistinct('op.objectid')
-			->from($this->dbObjectPropertiesTable, 'op')
-			->andWhere($innerQuery->expr()->eq('op.calendarid',
-				$outerQuery->createNamedParameter($calendarInfo['id'])))
-			->andWhere($innerQuery->expr()->eq('op.calendartype',
-				$outerQuery->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)));
-
-		// only return public items for shared calendars for now
-		if ($calendarInfo['principaluri'] !== $calendarInfo['{http://owncloud.org/ns}owner-principal']) {
-			$innerQuery->andWhere($innerQuery->expr()->eq('c.classification',
-				$outerQuery->createNamedParameter(self::CLASSIFICATION_PUBLIC)));
-		}
-
-		$or = $innerQuery->expr()->orX();
-		foreach ($searchProperties as $searchProperty) {
-			$or->add($innerQuery->expr()->eq('op.name',
-				$outerQuery->createNamedParameter($searchProperty)));
-		}
-		$innerQuery->andWhere($or);
-
-		if ($pattern !== '') {
-			$innerQuery->andWhere($innerQuery->expr()->iLike('op.value',
-				$outerQuery->createNamedParameter('%' .
-					$this->db->escapeLikeParameter($pattern) . '%')));
-		}
-
-		$outerQuery->select('c.id', 'c.calendardata', 'c.componenttype', 'c.uid', 'c.uri')
-			->from('calendarobjects', 'c');
-
-		if (isset($options['timerange'])) {
-			if (isset($options['timerange']['start']) && $options['timerange']['start'] instanceof DateTime) {
-				$outerQuery->andWhere($outerQuery->expr()->gt('lastoccurence',
-					$outerQuery->createNamedParameter($options['timerange']['start']->getTimeStamp())));
-			}
-			if (isset($options['timerange']['end']) && $options['timerange']['end'] instanceof DateTime) {
-				$outerQuery->andWhere($outerQuery->expr()->lt('firstoccurence',
-					$outerQuery->createNamedParameter($options['timerange']['end']->getTimeStamp())));
-			}
-		}
-
-		if (isset($options['types'])) {
-			$or = $outerQuery->expr()->orX();
-			foreach ($options['types'] as $type) {
-				$or->add($outerQuery->expr()->eq('componenttype',
-					$outerQuery->createNamedParameter($type)));
-			}
-			$outerQuery->andWhere($or);
-		}
-
-		$outerQuery->andWhere($outerQuery->expr()->in('c.id',
-			$outerQuery->createFunction($innerQuery->getSQL())));
-
-		if ($offset) {
-			$outerQuery->setFirstResult($offset);
-		}
-		if ($limit) {
-			$outerQuery->setMaxResults($limit);
-		}
-
-		$result = $outerQuery->execute();
-		$calendarObjects = $result->fetchAll();
-
-		return array_map(function ($o) {
-			$calendarData = Reader::read($o['calendardata']);
-			$comps = $calendarData->getComponents();
-			$objects = [];
-			$timezones = [];
-			foreach ($comps as $comp) {
-				if ($comp instanceof VTimeZone) {
-					$timezones[] = $comp;
-				} else {
-					$objects[] = $comp;
-				}
-			}
-
-			return [
-				'id' => $o['id'],
-				'type' => $o['componenttype'],
-				'uid' => $o['uid'],
-				'uri' => $o['uri'],
-				'objects' => array_map(function ($c) {
-					return $this->transformSearchData($c);
-				}, $objects),
-				'timezones' => array_map(function ($c) {
-					return $this->transformSearchData($c);
-				}, $timezones),
-			];
-		}, $calendarObjects);
-	}
-
-	/**
-	 * @param Component $comp
-	 * @return array
-	 */
-	private function transformSearchData(Component $comp) {
-		$data = [];
-		/** @var Component[] $subComponents */
-		$subComponents = $comp->getComponents();
-		/** @var Property[] $properties */
-		$properties = array_filter($comp->children(), function ($c) {
-			return $c instanceof Property;
-		});
-		$validationRules = $comp->getValidationRules();
-
-		foreach ($subComponents as $subComponent) {
-			$name = $subComponent->name;
-			if (!isset($data[$name])) {
-				$data[$name] = [];
-			}
-			$data[$name][] = $this->transformSearchData($subComponent);
-		}
-
-		foreach ($properties as $property) {
-			$name = $property->name;
-			if (!isset($validationRules[$name])) {
-				$validationRules[$name] = '*';
-			}
-
-			$rule = $validationRules[$property->name];
-			if ($rule === '+' || $rule === '*') { // multiple
-				if (!isset($data[$name])) {
-					$data[$name] = [];
-				}
-
-				$data[$name][] = $this->transformSearchProperty($property);
-			} else { // once
-				$data[$name] = $this->transformSearchProperty($property);
-			}
-		}
-
-		return $data;
-	}
-
-	/**
-	 * @param Property $prop
-	 * @return array
-	 */
-	private function transformSearchProperty(Property $prop) {
-		// No need to check Date, as it extends DateTime
-		if ($prop instanceof Property\ICalendar\DateTime) {
-			$value = $prop->getDateTime();
-		} else {
-			$value = $prop->getValue();
-		}
-
-		return [
-			$value,
-			$prop->parameters()
-		];
-	}
-
-	/**
-	 * @param string $principalUri
-	 * @param string $pattern
-	 * @param array $componentTypes
-	 * @param array $searchProperties
-	 * @param array $searchParameters
-	 * @param array $options
-	 * @return array
-	 */
-	public function searchPrincipalUri(string $principalUri,
-									   string $pattern,
-									   array $componentTypes,
-									   array $searchProperties,
-									   array $searchParameters,
-									   array $options = []): array {
-		$escapePattern = !\array_key_exists('escape_like_param', $options) || $options['escape_like_param'] !== false;
-
-		$calendarObjectIdQuery = $this->db->getQueryBuilder();
-		$calendarOr = $calendarObjectIdQuery->expr()->orX();
-		$searchOr = $calendarObjectIdQuery->expr()->orX();
-
-		// Fetch calendars and subscription
-		$calendars = $this->getCalendarsForUser($principalUri);
-		$subscriptions = $this->getSubscriptionsForUser($principalUri);
-		foreach ($calendars as $calendar) {
-			$calendarAnd = $calendarObjectIdQuery->expr()->andX();
-			$calendarAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendarid', $calendarObjectIdQuery->createNamedParameter((int)$calendar['id'])));
-			$calendarAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendartype', $calendarObjectIdQuery->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)));
-
-			// If it's shared, limit search to public events
-			if ($calendar['principaluri'] !== $calendar['{http://owncloud.org/ns}owner-principal']) {
-				$calendarAnd->add($calendarObjectIdQuery->expr()->eq('co.classification', $calendarObjectIdQuery->createNamedParameter(self::CLASSIFICATION_PUBLIC)));
-			}
-
-			$calendarOr->add($calendarAnd);
-		}
-		foreach ($subscriptions as $subscription) {
-			$subscriptionAnd = $calendarObjectIdQuery->expr()->andX();
-			$subscriptionAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendarid', $calendarObjectIdQuery->createNamedParameter((int)$subscription['id'])));
-			$subscriptionAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendartype', $calendarObjectIdQuery->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)));
-
-			// If it's shared, limit search to public events
-			if ($subscription['principaluri'] !== $subscription['{http://owncloud.org/ns}owner-principal']) {
-				$subscriptionAnd->add($calendarObjectIdQuery->expr()->eq('co.classification', $calendarObjectIdQuery->createNamedParameter(self::CLASSIFICATION_PUBLIC)));
-			}
-
-			$calendarOr->add($subscriptionAnd);
-		}
-
-		foreach ($searchProperties as $property) {
-			$propertyAnd = $calendarObjectIdQuery->expr()->andX();
-			$propertyAnd->add($calendarObjectIdQuery->expr()->eq('cob.name', $calendarObjectIdQuery->createNamedParameter($property, IQueryBuilder::PARAM_STR)));
-			$propertyAnd->add($calendarObjectIdQuery->expr()->isNull('cob.parameter'));
-
-			$searchOr->add($propertyAnd);
-		}
-		foreach ($searchParameters as $property => $parameter) {
-			$parameterAnd = $calendarObjectIdQuery->expr()->andX();
-			$parameterAnd->add($calendarObjectIdQuery->expr()->eq('cob.name', $calendarObjectIdQuery->createNamedParameter($property, IQueryBuilder::PARAM_STR)));
-			$parameterAnd->add($calendarObjectIdQuery->expr()->eq('cob.parameter', $calendarObjectIdQuery->createNamedParameter($parameter, IQueryBuilder::PARAM_STR)));
-
-			$searchOr->add($parameterAnd);
-		}
-
-		if ($calendarOr->count() === 0) {
-			return [];
-		}
-		if ($searchOr->count() === 0) {
-			return [];
-		}
-
-		$calendarObjectIdQuery->selectDistinct('cob.objectid')
-			->from($this->dbObjectPropertiesTable, 'cob')
-			->leftJoin('cob', 'calendarobjects', 'co', $calendarObjectIdQuery->expr()->eq('co.id', 'cob.objectid'))
-			->andWhere($calendarObjectIdQuery->expr()->in('co.componenttype', $calendarObjectIdQuery->createNamedParameter($componentTypes, IQueryBuilder::PARAM_STR_ARRAY)))
-			->andWhere($calendarOr)
-			->andWhere($searchOr);
-
-		if ('' !== $pattern) {
-			if (!$escapePattern) {
-				$calendarObjectIdQuery->andWhere($calendarObjectIdQuery->expr()->ilike('cob.value', $calendarObjectIdQuery->createNamedParameter($pattern)));
-			} else {
-				$calendarObjectIdQuery->andWhere($calendarObjectIdQuery->expr()->ilike('cob.value', $calendarObjectIdQuery->createNamedParameter('%' . $this->db->escapeLikeParameter($pattern) . '%')));
-			}
-		}
-
-		if (isset($options['limit'])) {
-			$calendarObjectIdQuery->setMaxResults($options['limit']);
-		}
-		if (isset($options['offset'])) {
-			$calendarObjectIdQuery->setFirstResult($options['offset']);
-		}
-
-		$result = $calendarObjectIdQuery->execute();
-		$matches = $result->fetchAll();
-		$result->closeCursor();
-		$matches = array_map(static function (array $match):int {
-			return (int) $match['objectid'];
-		}, $matches);
-
-		$query = $this->db->getQueryBuilder();
-		$query->select('calendardata', 'uri', 'calendarid', 'calendartype')
-			->from('calendarobjects')
-			->where($query->expr()->in('id', $query->createNamedParameter($matches, IQueryBuilder::PARAM_INT_ARRAY)));
-
-		$result = $query->execute();
-		$calendarObjects = $result->fetchAll();
-		$result->closeCursor();
-
-		return array_map(function (array $array): array {
-			$array['calendarid'] = (int)$array['calendarid'];
-			$array['calendartype'] = (int)$array['calendartype'];
-			$array['calendardata'] = $this->readBlob($array['calendardata']);
-
-			return $array;
-		}, $calendarObjects);
-	}
-
-	/**
-	 * Searches through all of a users calendars and calendar objects to find
-	 * an object with a specific UID.
-	 *
-	 * This method should return the path to this object, relative to the
-	 * calendar home, so this path usually only contains two parts:
-	 *
-	 * calendarpath/objectpath.ics
-	 *
-	 * If the uid is not found, return null.
-	 *
-	 * This method should only consider * objects that the principal owns, so
-	 * any calendars owned by other principals that also appear in this
-	 * collection should be ignored.
-	 *
-	 * @param string $principalUri
-	 * @param string $uid
-	 * @return string|null
-	 */
-	public function getCalendarObjectByUID($principalUri, $uid) {
-		$query = $this->db->getQueryBuilder();
-		$query->selectAlias('c.uri', 'calendaruri')->selectAlias('co.uri', 'objecturi')
-			->from('calendarobjects', 'co')
-			->leftJoin('co', 'calendars', 'c', $query->expr()->eq('co.calendarid', 'c.id'))
-			->where($query->expr()->eq('c.principaluri', $query->createNamedParameter($principalUri)))
-			->andWhere($query->expr()->eq('co.uid', $query->createNamedParameter($uid)));
-
-		$stmt = $query->execute();
-
-		if ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			return $row['calendaruri'] . '/' . $row['objecturi'];
-		}
-
-		return null;
-	}
-
-	/**
-	 * The getChanges method returns all the changes that have happened, since
-	 * the specified syncToken in the specified calendar.
-	 *
-	 * This function should return an array, such as the following:
-	 *
-	 * [
-	 *   'syncToken' => 'The current synctoken',
-	 *   'added'   => [
-	 *      'new.txt',
-	 *   ],
-	 *   'modified'   => [
-	 *      'modified.txt',
-	 *   ],
-	 *   'deleted' => [
-	 *      'foo.php.bak',
-	 *      'old.txt'
-	 *   ]
-	 * );
-	 *
-	 * The returned syncToken property should reflect the *current* syncToken
-	 * of the calendar, as reported in the {http://sabredav.org/ns}sync-token
-	 * property This is * needed here too, to ensure the operation is atomic.
-	 *
-	 * If the $syncToken argument is specified as null, this is an initial
-	 * sync, and all members should be reported.
-	 *
-	 * The modified property is an array of nodenames that have changed since
-	 * the last token.
-	 *
-	 * The deleted property is an array with nodenames, that have been deleted
-	 * from collection.
-	 *
-	 * The $syncLevel argument is basically the 'depth' of the report. If it's
-	 * 1, you only have to report changes that happened only directly in
-	 * immediate descendants. If it's 2, it should also include changes from
-	 * the nodes below the child collections. (grandchildren)
-	 *
-	 * The $limit argument allows a client to specify how many results should
-	 * be returned at most. If the limit is not specified, it should be treated
-	 * as infinite.
-	 *
-	 * If the limit (infinite or not) is higher than you're willing to return,
-	 * you should throw a Sabre\DAV\Exception\TooMuchMatches() exception.
-	 *
-	 * If the syncToken is expired (due to data cleanup) or unknown, you must
-	 * return null.
-	 *
-	 * The limit is 'suggestive'. You are free to ignore it.
-	 *
-	 * @param string $calendarId
-	 * @param string $syncToken
-	 * @param int $syncLevel
-	 * @param int $limit
-	 * @param int $calendarType
-	 * @return array
-	 */
-	public function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
-		// Current synctoken
-		$stmt = $this->db->prepare('SELECT `synctoken` FROM `*PREFIX*calendars` WHERE `id` = ?');
-		$stmt->execute([ $calendarId ]);
-		$currentToken = $stmt->fetchColumn(0);
-
-		if (is_null($currentToken)) {
-			return null;
-		}
-
-		$result = [
-			'syncToken' => $currentToken,
-			'added'     => [],
-			'modified'  => [],
-			'deleted'   => [],
-		];
-
-		if ($syncToken) {
-			$query = "SELECT `uri`, `operation` FROM `*PREFIX*calendarchanges` WHERE `synctoken` >= ? AND `synctoken` < ? AND `calendarid` = ? AND `calendartype` = ? ORDER BY `synctoken`";
-			if ($limit>0) {
-				$query.= " LIMIT " . (int)$limit;
-			}
-
-			// Fetching all changes
-			$stmt = $this->db->prepare($query);
-			$stmt->execute([$syncToken, $currentToken, $calendarId, $calendarType]);
-
-			$changes = [];
-
-			// This loop ensures that any duplicates are overwritten, only the
-			// last change on a node is relevant.
-			while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-				$changes[$row['uri']] = $row['operation'];
-			}
-
-			foreach ($changes as $uri => $operation) {
-				switch ($operation) {
-					case 1:
-						$result['added'][] = $uri;
-						break;
-					case 2:
-						$result['modified'][] = $uri;
-						break;
-					case 3:
-						$result['deleted'][] = $uri;
-						break;
-				}
-			}
-		} else {
-			// No synctoken supplied, this is the initial sync.
-			$query = "SELECT `uri` FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ? AND `calendartype` = ?";
-			$stmt = $this->db->prepare($query);
-			$stmt->execute([$calendarId, $calendarType]);
-
-			$result['added'] = $stmt->fetchAll(\PDO::FETCH_COLUMN);
-		}
-		return $result;
-	}
-
-	/**
-	 * Returns a list of subscriptions for a principal.
-	 *
-	 * Every subscription is an array with the following keys:
-	 *  * id, a unique id that will be used by other functions to modify the
-	 *    subscription. This can be the same as the uri or a database key.
-	 *  * uri. This is just the 'base uri' or 'filename' of the subscription.
-	 *  * principaluri. The owner of the subscription. Almost always the same as
-	 *    principalUri passed to this method.
-	 *
-	 * Furthermore, all the subscription info must be returned too:
-	 *
-	 * 1. {DAV:}displayname
-	 * 2. {http://apple.com/ns/ical/}refreshrate
-	 * 3. {http://calendarserver.org/ns/}subscribed-strip-todos (omit if todos
-	 *    should not be stripped).
-	 * 4. {http://calendarserver.org/ns/}subscribed-strip-alarms (omit if alarms
-	 *    should not be stripped).
-	 * 5. {http://calendarserver.org/ns/}subscribed-strip-attachments (omit if
-	 *    attachments should not be stripped).
-	 * 6. {http://calendarserver.org/ns/}source (Must be a
-	 *     Sabre\DAV\Property\Href).
-	 * 7. {http://apple.com/ns/ical/}calendar-color
-	 * 8. {http://apple.com/ns/ical/}calendar-order
-	 * 9. {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
-	 *    (should just be an instance of
-	 *    Sabre\CalDAV\Property\SupportedCalendarComponentSet, with a bunch of
-	 *    default components).
-	 *
-	 * @param string $principalUri
-	 * @return array
-	 */
-	public function getSubscriptionsForUser($principalUri) {
-		$fields = array_values($this->subscriptionPropertyMap);
-		$fields[] = 'id';
-		$fields[] = 'uri';
-		$fields[] = 'source';
-		$fields[] = 'principaluri';
-		$fields[] = 'lastmodified';
-		$fields[] = 'synctoken';
-
-		$query = $this->db->getQueryBuilder();
-		$query->select($fields)
-			->from('calendarsubscriptions')
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
-			->orderBy('calendarorder', 'asc');
-		$stmt =$query->execute();
-
-		$subscriptions = [];
-		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			$subscription = [
-				'id'           => $row['id'],
-				'uri'          => $row['uri'],
-				'principaluri' => $row['principaluri'],
-				'source'       => $row['source'],
-				'lastmodified' => $row['lastmodified'],
-
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			];
-
-			foreach ($this->subscriptionPropertyMap as $xmlName=>$dbName) {
-				if (!is_null($row[$dbName])) {
-					$subscription[$xmlName] = $row[$dbName];
-				}
-			}
-
-			$subscriptions[] = $subscription;
-		}
-
-		return $subscriptions;
-	}
-
-	/**
-	 * Creates a new subscription for a principal.
-	 *
-	 * If the creation was a success, an id must be returned that can be used to reference
-	 * this subscription in other methods, such as updateSubscription.
-	 *
-	 * @param string $principalUri
-	 * @param string $uri
-	 * @param array $properties
-	 * @return mixed
-	 */
-	public function createSubscription($principalUri, $uri, array $properties) {
-		if (!isset($properties['{http://calendarserver.org/ns/}source'])) {
-			throw new Forbidden('The {http://calendarserver.org/ns/}source property is required when creating subscriptions');
-		}
-
-		$values = [
-			'principaluri' => $principalUri,
-			'uri'          => $uri,
-			'source'       => $properties['{http://calendarserver.org/ns/}source']->getHref(),
-			'lastmodified' => time(),
-		];
-
-		$propertiesBoolean = ['striptodos', 'stripalarms', 'stripattachments'];
-
-		foreach ($this->subscriptionPropertyMap as $xmlName=>$dbName) {
-			if (array_key_exists($xmlName, $properties)) {
-				$values[$dbName] = $properties[$xmlName];
-				if (in_array($dbName, $propertiesBoolean)) {
-					$values[$dbName] = true;
-				}
-			}
-		}
-
-		$valuesToInsert = [];
-
-		$query = $this->db->getQueryBuilder();
-
-		foreach (array_keys($values) as $name) {
-			$valuesToInsert[$name] = $query->createNamedParameter($values[$name]);
-		}
-
-		$query->insert('calendarsubscriptions')
-			->values($valuesToInsert)
-			->execute();
-
-		$subscriptionId = $this->db->lastInsertId('*PREFIX*calendarsubscriptions');
-
-		$subscriptionRow = $this->getSubscriptionById($subscriptionId);
-		$this->dispatcher->dispatchTyped(new SubscriptionCreatedEvent((int)$subscriptionId, $subscriptionRow));
-		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createSubscription', new GenericEvent(
-			'\OCA\DAV\CalDAV\CalDavBackend::createSubscription',
-			[
-				'subscriptionId' => $subscriptionId,
-				'subscriptionData' => $subscriptionRow,
-			]));
-
-		return $subscriptionId;
-	}
-
-	/**
-	 * Updates a subscription
-	 *
-	 * The list of mutations is stored in a Sabre\DAV\PropPatch object.
-	 * To do the actual updates, you must tell this object which properties
-	 * you're going to process with the handle() method.
-	 *
-	 * Calling the handle method is like telling the PropPatch object "I
-	 * promise I can handle updating this property".
-	 *
-	 * Read the PropPatch documentation for more info and examples.
-	 *
-	 * @param mixed $subscriptionId
-	 * @param PropPatch $propPatch
-	 * @return void
-	 */
-	public function updateSubscription($subscriptionId, PropPatch $propPatch) {
-		$supportedProperties = array_keys($this->subscriptionPropertyMap);
-		$supportedProperties[] = '{http://calendarserver.org/ns/}source';
-
-		$propPatch->handle($supportedProperties, function ($mutations) use ($subscriptionId) {
-			$newValues = [];
-
-			foreach ($mutations as $propertyName=>$propertyValue) {
-				if ($propertyName === '{http://calendarserver.org/ns/}source') {
-					$newValues['source'] = $propertyValue->getHref();
-				} else {
-					$fieldName = $this->subscriptionPropertyMap[$propertyName];
-					$newValues[$fieldName] = $propertyValue;
-				}
-			}
-
-			$query = $this->db->getQueryBuilder();
-			$query->update('calendarsubscriptions')
-				->set('lastmodified', $query->createNamedParameter(time()));
-			foreach ($newValues as $fieldName=>$value) {
-				$query->set($fieldName, $query->createNamedParameter($value));
-			}
-			$query->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
-				->execute();
-
-			$subscriptionRow = $this->getSubscriptionById($subscriptionId);
-			$this->dispatcher->dispatchTyped(new SubscriptionUpdatedEvent((int)$subscriptionId, $subscriptionRow, [], $mutations));
-			$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateSubscription', new GenericEvent(
-				'\OCA\DAV\CalDAV\CalDavBackend::updateSubscription',
-				[
-					'subscriptionId' => $subscriptionId,
-					'subscriptionData' => $subscriptionRow,
-					'propertyMutations' => $mutations,
-				]));
-
-			return true;
-		});
-	}
-
-	/**
-	 * Deletes a subscription.
-	 *
-	 * @param mixed $subscriptionId
-	 * @return void
-	 */
-	public function deleteSubscription($subscriptionId) {
-		$subscriptionRow = $this->getSubscriptionById($subscriptionId);
-
-		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteSubscription', new GenericEvent(
-			'\OCA\DAV\CalDAV\CalDavBackend::deleteSubscription',
-			[
-				'subscriptionId' => $subscriptionId,
-				'subscriptionData' => $this->getSubscriptionById($subscriptionId),
-			]));
-
-		$query = $this->db->getQueryBuilder();
-		$query->delete('calendarsubscriptions')
-			->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
-			->execute();
-
-		$query = $this->db->getQueryBuilder();
-		$query->delete('calendarobjects')
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
-			->execute();
-
-		$query->delete('calendarchanges')
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
-			->execute();
-
-		$query->delete($this->dbObjectPropertiesTable)
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
-			->execute();
-
-		if ($subscriptionRow) {
-			$this->dispatcher->dispatchTyped(new SubscriptionDeletedEvent((int)$subscriptionId, $subscriptionRow, []));
-		}
-	}
-
-	/**
-	 * Returns a single scheduling object for the inbox collection.
-	 *
-	 * The returned array should contain the following elements:
-	 *   * uri - A unique basename for the object. This will be used to
-	 *           construct a full uri.
-	 *   * calendardata - The iCalendar object
-	 *   * lastmodified - The last modification date. Can be an int for a unix
-	 *                    timestamp, or a PHP DateTime object.
-	 *   * etag - A unique token that must change if the object changed.
-	 *   * size - The size of the object, in bytes.
-	 *
-	 * @param string $principalUri
-	 * @param string $objectUri
-	 * @return array
-	 */
-	public function getSchedulingObject($principalUri, $objectUri) {
-		$query = $this->db->getQueryBuilder();
-		$stmt = $query->select(['uri', 'calendardata', 'lastmodified', 'etag', 'size'])
-			->from('schedulingobjects')
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
-			->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
-			->execute();
-
-		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
-
-		if (!$row) {
-			return null;
-		}
-
-		return [
-			'uri'          => $row['uri'],
-			'calendardata' => $row['calendardata'],
-			'lastmodified' => $row['lastmodified'],
-			'etag'         => '"' . $row['etag'] . '"',
-			'size'         => (int)$row['size'],
-		];
-	}
-
-	/**
-	 * Returns all scheduling objects for the inbox collection.
-	 *
-	 * These objects should be returned as an array. Every item in the array
-	 * should follow the same structure as returned from getSchedulingObject.
-	 *
-	 * The main difference is that 'calendardata' is optional.
-	 *
-	 * @param string $principalUri
-	 * @return array
-	 */
-	public function getSchedulingObjects($principalUri) {
-		$query = $this->db->getQueryBuilder();
-		$stmt = $query->select(['uri', 'calendardata', 'lastmodified', 'etag', 'size'])
-				->from('schedulingobjects')
-				->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
-				->execute();
-
-		$result = [];
-		foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
-			$result[] = [
-				'calendardata' => $row['calendardata'],
-				'uri'          => $row['uri'],
-				'lastmodified' => $row['lastmodified'],
-				'etag'         => '"' . $row['etag'] . '"',
-				'size'         => (int)$row['size'],
-			];
-		}
-
-		return $result;
-	}
-
-	/**
-	 * Deletes a scheduling object from the inbox collection.
-	 *
-	 * @param string $principalUri
-	 * @param string $objectUri
-	 * @return void
-	 */
-	public function deleteSchedulingObject($principalUri, $objectUri) {
-		$query = $this->db->getQueryBuilder();
-		$query->delete('schedulingobjects')
-				->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
-				->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
-				->execute();
-	}
-
-	/**
-	 * Creates a new scheduling object. This should land in a users' inbox.
-	 *
-	 * @param string $principalUri
-	 * @param string $objectUri
-	 * @param string $objectData
-	 * @return void
-	 */
-	public function createSchedulingObject($principalUri, $objectUri, $objectData) {
-		$query = $this->db->getQueryBuilder();
-		$query->insert('schedulingobjects')
-			->values([
-				'principaluri' => $query->createNamedParameter($principalUri),
-				'calendardata' => $query->createNamedParameter($objectData, IQueryBuilder::PARAM_LOB),
-				'uri' => $query->createNamedParameter($objectUri),
-				'lastmodified' => $query->createNamedParameter(time()),
-				'etag' => $query->createNamedParameter(md5($objectData)),
-				'size' => $query->createNamedParameter(strlen($objectData))
-			])
-			->execute();
-	}
-
-	/**
-	 * Adds a change record to the calendarchanges table.
-	 *
-	 * @param mixed $calendarId
-	 * @param string $objectUri
-	 * @param int $operation 1 = add, 2 = modify, 3 = delete.
-	 * @param int $calendarType
-	 * @return void
-	 */
-	protected function addChange($calendarId, $objectUri, $operation, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
-		$table = $calendarType === self::CALENDAR_TYPE_CALENDAR ? 'calendars': 'calendarsubscriptions';
-
-		$query = $this->db->getQueryBuilder();
-		$query->select('synctoken')
-			->from($table)
-			->where($query->expr()->eq('id', $query->createNamedParameter($calendarId)));
-		$syncToken = (int)$query->execute()->fetchColumn();
-
-		$query = $this->db->getQueryBuilder();
-		$query->insert('calendarchanges')
-			->values([
-				'uri' => $query->createNamedParameter($objectUri),
-				'synctoken' => $query->createNamedParameter($syncToken),
-				'calendarid' => $query->createNamedParameter($calendarId),
-				'operation' => $query->createNamedParameter($operation),
-				'calendartype' => $query->createNamedParameter($calendarType),
-			])
-			->execute();
-
-		$stmt = $this->db->prepare("UPDATE `*PREFIX*$table` SET `synctoken` = `synctoken` + 1 WHERE `id` = ?");
-		$stmt->execute([
-			$calendarId
-		]);
-	}
-
-	/**
-	 * Parses some information from calendar objects, used for optimized
-	 * calendar-queries.
-	 *
-	 * Returns an array with the following keys:
-	 *   * etag - An md5 checksum of the object without the quotes.
-	 *   * size - Size of the object in bytes
-	 *   * componentType - VEVENT, VTODO or VJOURNAL
-	 *   * firstOccurence
-	 *   * lastOccurence
-	 *   * uid - value of the UID property
-	 *
-	 * @param string $calendarData
-	 * @return array
-	 */
-	public function getDenormalizedData($calendarData) {
-		$vObject = Reader::read($calendarData);
-		$componentType = null;
-		$component = null;
-		$firstOccurrence = null;
-		$lastOccurrence = null;
-		$uid = null;
-		$classification = self::CLASSIFICATION_PUBLIC;
-		foreach ($vObject->getComponents() as $component) {
-			if ($component->name!=='VTIMEZONE') {
-				$componentType = $component->name;
-				$uid = (string)$component->UID;
-				break;
-			}
-		}
-		if (!$componentType) {
-			throw new \Sabre\DAV\Exception\BadRequest('Calendar objects must have a VJOURNAL, VEVENT or VTODO component');
-		}
-		if ($componentType === 'VEVENT' && $component->DTSTART) {
-			$firstOccurrence = $component->DTSTART->getDateTime()->getTimeStamp();
-			// Finding the last occurrence is a bit harder
-			if (!isset($component->RRULE)) {
-				if (isset($component->DTEND)) {
-					$lastOccurrence = $component->DTEND->getDateTime()->getTimeStamp();
-				} elseif (isset($component->DURATION)) {
-					$endDate = clone $component->DTSTART->getDateTime();
-					$endDate->add(DateTimeParser::parse($component->DURATION->getValue()));
-					$lastOccurrence = $endDate->getTimeStamp();
-				} elseif (!$component->DTSTART->hasTime()) {
-					$endDate = clone $component->DTSTART->getDateTime();
-					$endDate->modify('+1 day');
-					$lastOccurrence = $endDate->getTimeStamp();
-				} else {
-					$lastOccurrence = $firstOccurrence;
-				}
-			} else {
-				$it = new EventIterator($vObject, (string)$component->UID);
-				$maxDate = new DateTime(self::MAX_DATE);
-				if ($it->isInfinite()) {
-					$lastOccurrence = $maxDate->getTimestamp();
-				} else {
-					$end = $it->getDtEnd();
-					while ($it->valid() && $end < $maxDate) {
-						$end = $it->getDtEnd();
-						$it->next();
-					}
-					$lastOccurrence = $end->getTimestamp();
-				}
-			}
-		}
-
-		if ($component->CLASS) {
-			$classification = CalDavBackend::CLASSIFICATION_PRIVATE;
-			switch ($component->CLASS->getValue()) {
-				case 'PUBLIC':
-					$classification = CalDavBackend::CLASSIFICATION_PUBLIC;
-					break;
-				case 'CONFIDENTIAL':
-					$classification = CalDavBackend::CLASSIFICATION_CONFIDENTIAL;
-					break;
-			}
-		}
-		return [
-			'etag' => md5($calendarData),
-			'size' => strlen($calendarData),
-			'componentType' => $componentType,
-			'firstOccurence' => is_null($firstOccurrence) ? null : max(0, $firstOccurrence),
-			'lastOccurence'  => $lastOccurrence,
-			'uid' => $uid,
-			'classification' => $classification
-		];
-	}
-
-	/**
-	 * @param $cardData
-	 * @return bool|string
-	 */
-	private function readBlob($cardData) {
-		if (is_resource($cardData)) {
-			return stream_get_contents($cardData);
-		}
-
-		return $cardData;
-	}
-
-	/**
-	 * @param IShareable $shareable
-	 * @param array $add
-	 * @param array $remove
-	 */
-	public function updateShares($shareable, $add, $remove) {
-		$calendarId = $shareable->getResourceId();
-		$calendarRow = $this->getCalendarById($calendarId);
-		$oldShares = $this->getShares($calendarId);
-
-		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateShares', new GenericEvent(
-			'\OCA\DAV\CalDAV\CalDavBackend::updateShares',
-			[
-				'calendarId' => $calendarId,
-				'calendarData' => $calendarRow,
-				'shares' => $oldShares,
-				'add' => $add,
-				'remove' => $remove,
-			]));
-		$this->calendarSharingBackend->updateShares($shareable, $add, $remove);
-
-		$this->dispatcher->dispatchTyped(new CalendarShareUpdatedEvent((int)$calendarId, $calendarRow, $oldShares, $add, $remove));
-	}
-
-	/**
-	 * @param int $resourceId
-	 * @param int $calendarType
-	 * @return array
-	 */
-	public function getShares($resourceId, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
-		return $this->calendarSharingBackend->getShares($resourceId);
-	}
-
-	/**
-	 * @param boolean $value
-	 * @param \OCA\DAV\CalDAV\Calendar $calendar
-	 * @return string|null
-	 */
-	public function setPublishStatus($value, $calendar) {
-		$calendarId = $calendar->getResourceId();
-		$calendarData = $this->getCalendarById($calendarId);
-		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::publishCalendar', new GenericEvent(
-			'\OCA\DAV\CalDAV\CalDavBackend::updateShares',
-			[
-				'calendarId' => $calendarId,
-				'calendarData' => $calendarData,
-				'public' => $value,
-			]));
-
-		$query = $this->db->getQueryBuilder();
-		if ($value) {
-			$publicUri = $this->random->generate(16, ISecureRandom::CHAR_HUMAN_READABLE);
-			$query->insert('dav_shares')
-				->values([
-					'principaluri' => $query->createNamedParameter($calendar->getPrincipalURI()),
-					'type' => $query->createNamedParameter('calendar'),
-					'access' => $query->createNamedParameter(self::ACCESS_PUBLIC),
-					'resourceid' => $query->createNamedParameter($calendar->getResourceId()),
-					'publicuri' => $query->createNamedParameter($publicUri)
-				]);
-			$query->execute();
-
-			$this->dispatcher->dispatchTyped(new CalendarPublishedEvent((int)$calendarId, $calendarData, $publicUri));
-			return $publicUri;
-		}
-		$query->delete('dav_shares')
-			->where($query->expr()->eq('resourceid', $query->createNamedParameter($calendar->getResourceId())))
-			->andWhere($query->expr()->eq('access', $query->createNamedParameter(self::ACCESS_PUBLIC)));
-		$query->execute();
-
-		$this->dispatcher->dispatchTyped(new CalendarUnpublishedEvent((int)$calendarId, $calendarData));
-		return null;
-	}
-
-	/**
-	 * @param \OCA\DAV\CalDAV\Calendar $calendar
-	 * @return mixed
-	 */
-	public function getPublishStatus($calendar) {
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select('publicuri')
-			->from('dav_shares')
-			->where($query->expr()->eq('resourceid', $query->createNamedParameter($calendar->getResourceId())))
-			->andWhere($query->expr()->eq('access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
-			->execute();
-
-		$row = $result->fetch();
-		$result->closeCursor();
-		return $row ? reset($row) : false;
-	}
-
-	/**
-	 * @param int $resourceId
-	 * @param array $acl
-	 * @return array
-	 */
-	public function applyShareAcl($resourceId, $acl) {
-		return $this->calendarSharingBackend->applyShareAcl($resourceId, $acl);
-	}
-
-
-
-	/**
-	 * update properties table
-	 *
-	 * @param int $calendarId
-	 * @param string $objectUri
-	 * @param string $calendarData
-	 * @param int $calendarType
-	 */
-	public function updateProperties($calendarId, $objectUri, $calendarData, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
-		$objectId = $this->getCalendarObjectId($calendarId, $objectUri, $calendarType);
-
-		try {
-			$vCalendar = $this->readCalendarData($calendarData);
-		} catch (\Exception $ex) {
-			return;
-		}
-
-		$this->purgeProperties($calendarId, $objectId);
-
-		$query = $this->db->getQueryBuilder();
-		$query->insert($this->dbObjectPropertiesTable)
-			->values(
-				[
-					'calendarid' => $query->createNamedParameter($calendarId),
-					'calendartype' => $query->createNamedParameter($calendarType),
-					'objectid' => $query->createNamedParameter($objectId),
-					'name' => $query->createParameter('name'),
-					'parameter' => $query->createParameter('parameter'),
-					'value' => $query->createParameter('value'),
-				]
-			);
-
-		$indexComponents = ['VEVENT', 'VJOURNAL', 'VTODO'];
-		foreach ($vCalendar->getComponents() as $component) {
-			if (!in_array($component->name, $indexComponents)) {
-				continue;
-			}
-
-			foreach ($component->children() as $property) {
-				if (in_array($property->name, self::$indexProperties)) {
-					$value = $property->getValue();
-					// is this a shitty db?
-					if (!$this->db->supports4ByteText()) {
-						$value = preg_replace('/[\x{10000}-\x{10FFFF}]/u', "\xEF\xBF\xBD", $value);
-					}
-					$value = mb_substr($value, 0, 254);
-
-					$query->setParameter('name', $property->name);
-					$query->setParameter('parameter', null);
-					$query->setParameter('value', $value);
-					$query->execute();
-				}
-
-				if (array_key_exists($property->name, self::$indexParameters)) {
-					$parameters = $property->parameters();
-					$indexedParametersForProperty = self::$indexParameters[$property->name];
-
-					foreach ($parameters as $key => $value) {
-						if (in_array($key, $indexedParametersForProperty)) {
-							// is this a shitty db?
-							if ($this->db->supports4ByteText()) {
-								$value = preg_replace('/[\x{10000}-\x{10FFFF}]/u', "\xEF\xBF\xBD", $value);
-							}
-
-							$query->setParameter('name', $property->name);
-							$query->setParameter('parameter', mb_substr($key, 0, 254));
-							$query->setParameter('value', mb_substr($value, 0, 254));
-							$query->execute();
-						}
-					}
-				}
-			}
-		}
-	}
-
-	/**
-	 * deletes all birthday calendars
-	 */
-	public function deleteAllBirthdayCalendars() {
-		$query = $this->db->getQueryBuilder();
-		$result = $query->select(['id'])->from('calendars')
-			->where($query->expr()->eq('uri', $query->createNamedParameter(BirthdayService::BIRTHDAY_CALENDAR_URI)))
-			->execute();
-
-		$ids = $result->fetchAll();
-		foreach ($ids as $id) {
-			$this->deleteCalendar($id['id']);
-		}
-	}
-
-	/**
-	 * @param $subscriptionId
-	 */
-	public function purgeAllCachedEventsForSubscription($subscriptionId) {
-		$query = $this->db->getQueryBuilder();
-		$query->select('uri')
-			->from('calendarobjects')
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)));
-		$stmt = $query->execute();
-
-		$uris = [];
-		foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
-			$uris[] = $row['uri'];
-		}
-		$stmt->closeCursor();
-
-		$query = $this->db->getQueryBuilder();
-		$query->delete('calendarobjects')
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
-			->execute();
-
-		$query->delete('calendarchanges')
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
-			->execute();
-
-		$query->delete($this->dbObjectPropertiesTable)
-			->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
-			->execute();
-
-		foreach ($uris as $uri) {
-			$this->addChange($subscriptionId, $uri, 3, self::CALENDAR_TYPE_SUBSCRIPTION);
-		}
-	}
-
-	/**
-	 * Move a calendar from one user to another
-	 *
-	 * @param string $uriName
-	 * @param string $uriOrigin
-	 * @param string $uriDestination
-	 */
-	public function moveCalendar($uriName, $uriOrigin, $uriDestination) {
-		$query = $this->db->getQueryBuilder();
-		$query->update('calendars')
-			->set('principaluri', $query->createNamedParameter($uriDestination))
-			->where($query->expr()->eq('principaluri', $query->createNamedParameter($uriOrigin)))
-			->andWhere($query->expr()->eq('uri', $query->createNamedParameter($uriName)))
-			->execute();
-	}
-
-	/**
-	 * read VCalendar data into a VCalendar object
-	 *
-	 * @param string $objectData
-	 * @return VCalendar
-	 */
-	protected function readCalendarData($objectData) {
-		return Reader::read($objectData);
-	}
-
-	/**
-	 * delete all properties from a given calendar object
-	 *
-	 * @param int $calendarId
-	 * @param int $objectId
-	 */
-	protected function purgeProperties($calendarId, $objectId) {
-		$query = $this->db->getQueryBuilder();
-		$query->delete($this->dbObjectPropertiesTable)
-			->where($query->expr()->eq('objectid', $query->createNamedParameter($objectId)))
-			->andWhere($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)));
-		$query->execute();
-	}
-
-	/**
-	 * get ID from a given calendar object
-	 *
-	 * @param int $calendarId
-	 * @param string $uri
-	 * @param int $calendarType
-	 * @return int
-	 */
-	protected function getCalendarObjectId($calendarId, $uri, $calendarType):int {
-		$query = $this->db->getQueryBuilder();
-		$query->select('id')
-			->from('calendarobjects')
-			->where($query->expr()->eq('uri', $query->createNamedParameter($uri)))
-			->andWhere($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
-			->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter($calendarType)));
-
-		$result = $query->execute();
-		$objectIds = $result->fetch();
-		$result->closeCursor();
-
-		if (!isset($objectIds['id'])) {
-			throw new \InvalidArgumentException('Calendarobject does not exists: ' . $uri);
-		}
-
-		return (int)$objectIds['id'];
-	}
-
-	/**
-	 * return legacy endpoint principal name to new principal name
-	 *
-	 * @param $principalUri
-	 * @param $toV2
-	 * @return string
-	 */
-	private function convertPrincipal($principalUri, $toV2) {
-		if ($this->principalBackend->getPrincipalPrefix() === 'principals') {
-			list(, $name) = Uri\split($principalUri);
-			if ($toV2 === true) {
-				return "principals/users/$name";
-			}
-			return "principals/$name";
-		}
-		return $principalUri;
-	}
-
-	/**
-	 * adds information about an owner to the calendar data
-	 *
-	 * @param $calendarInfo
-	 */
-	private function addOwnerPrincipal(&$calendarInfo) {
-		$ownerPrincipalKey = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal';
-		$displaynameKey = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_NEXTCLOUD . '}owner-displayname';
-		if (isset($calendarInfo[$ownerPrincipalKey])) {
-			$uri = $calendarInfo[$ownerPrincipalKey];
-		} else {
-			$uri = $calendarInfo['principaluri'];
-		}
-
-		$principalInformation = $this->principalBackend->getPrincipalByPath($uri);
-		if (isset($principalInformation['{DAV:}displayname'])) {
-			$calendarInfo[$displaynameKey] = $principalInformation['{DAV:}displayname'];
-		}
-	}
+    public const CALENDAR_TYPE_CALENDAR = 0;
+    public const CALENDAR_TYPE_SUBSCRIPTION = 1;
+
+    public const PERSONAL_CALENDAR_URI = 'personal';
+    public const PERSONAL_CALENDAR_NAME = 'Personal';
+
+    public const RESOURCE_BOOKING_CALENDAR_URI = 'calendar';
+    public const RESOURCE_BOOKING_CALENDAR_NAME = 'Calendar';
+
+    /**
+     * We need to specify a max date, because we need to stop *somewhere*
+     *
+     * On 32 bit system the maximum for a signed integer is 2147483647, so
+     * MAX_DATE cannot be higher than date('Y-m-d', 2147483647) which results
+     * in 2038-01-19 to avoid problems when the date is converted
+     * to a unix timestamp.
+     */
+    public const MAX_DATE = '2038-01-01';
+
+    public const ACCESS_PUBLIC = 4;
+    public const CLASSIFICATION_PUBLIC = 0;
+    public const CLASSIFICATION_PRIVATE = 1;
+    public const CLASSIFICATION_CONFIDENTIAL = 2;
+
+    /**
+     * List of CalDAV properties, and how they map to database field names
+     * Add your own properties by simply adding on to this array.
+     *
+     * Note that only string-based properties are supported here.
+     *
+     * @var array
+     */
+    public $propertyMap = [
+        '{DAV:}displayname'                          => 'displayname',
+        '{urn:ietf:params:xml:ns:caldav}calendar-description' => 'description',
+        '{urn:ietf:params:xml:ns:caldav}calendar-timezone'    => 'timezone',
+        '{http://apple.com/ns/ical/}calendar-order'  => 'calendarorder',
+        '{http://apple.com/ns/ical/}calendar-color'  => 'calendarcolor',
+    ];
+
+    /**
+     * List of subscription properties, and how they map to database field names.
+     *
+     * @var array
+     */
+    public $subscriptionPropertyMap = [
+        '{DAV:}displayname'                                           => 'displayname',
+        '{http://apple.com/ns/ical/}refreshrate'                      => 'refreshrate',
+        '{http://apple.com/ns/ical/}calendar-order'                   => 'calendarorder',
+        '{http://apple.com/ns/ical/}calendar-color'                   => 'calendarcolor',
+        '{http://calendarserver.org/ns/}subscribed-strip-todos'       => 'striptodos',
+        '{http://calendarserver.org/ns/}subscribed-strip-alarms'      => 'stripalarms',
+        '{http://calendarserver.org/ns/}subscribed-strip-attachments' => 'stripattachments',
+    ];
+
+    /** @var array properties to index */
+    public static $indexProperties = ['CATEGORIES', 'COMMENT', 'DESCRIPTION',
+        'LOCATION', 'RESOURCES', 'STATUS', 'SUMMARY', 'ATTENDEE', 'CONTACT',
+        'ORGANIZER'];
+
+    /** @var array parameters to index */
+    public static $indexParameters = [
+        'ATTENDEE' => ['CN'],
+        'ORGANIZER' => ['CN'],
+    ];
+
+    /**
+     * @var string[] Map of uid => display name
+     */
+    protected $userDisplayNames;
+
+    /** @var IDBConnection */
+    private $db;
+
+    /** @var Backend */
+    private $calendarSharingBackend;
+
+    /** @var Principal */
+    private $principalBackend;
+
+    /** @var IUserManager */
+    private $userManager;
+
+    /** @var ISecureRandom */
+    private $random;
+
+    /** @var ILogger */
+    private $logger;
+
+    /** @var IEventDispatcher */
+    private $dispatcher;
+
+    /** @var EventDispatcherInterface */
+    private $legacyDispatcher;
+
+    /** @var bool */
+    private $legacyEndpoint;
+
+    /** @var string */
+    private $dbObjectPropertiesTable = 'calendarobjects_props';
+
+    /**
+     * CalDavBackend constructor.
+     *
+     * @param IDBConnection $db
+     * @param Principal $principalBackend
+     * @param IUserManager $userManager
+     * @param IGroupManager $groupManager
+     * @param ISecureRandom $random
+     * @param ILogger $logger
+     * @param IEventDispatcher $dispatcher
+     * @param EventDispatcherInterface $legacyDispatcher
+     * @param bool $legacyEndpoint
+     */
+    public function __construct(IDBConnection $db,
+                                Principal $principalBackend,
+                                IUserManager $userManager,
+                                IGroupManager $groupManager,
+                                ISecureRandom $random,
+                                ILogger $logger,
+                                IEventDispatcher $dispatcher,
+                                EventDispatcherInterface $legacyDispatcher,
+                                bool $legacyEndpoint = false) {
+        $this->db = $db;
+        $this->principalBackend = $principalBackend;
+        $this->userManager = $userManager;
+        $this->calendarSharingBackend = new Backend($this->db, $this->userManager, $groupManager, $principalBackend, 'calendar');
+        $this->random = $random;
+        $this->logger = $logger;
+        $this->dispatcher = $dispatcher;
+        $this->legacyDispatcher = $legacyDispatcher;
+        $this->legacyEndpoint = $legacyEndpoint;
+    }
+
+    /**
+     * Return the number of calendars for a principal
+     *
+     * By default this excludes the automatically generated birthday calendar
+     *
+     * @param $principalUri
+     * @param bool $excludeBirthday
+     * @return int
+     */
+    public function getCalendarsForUserCount($principalUri, $excludeBirthday = true) {
+        $principalUri = $this->convertPrincipal($principalUri, true);
+        $query = $this->db->getQueryBuilder();
+        $query->select($query->func()->count('*'))
+            ->from('calendars')
+            ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)));
+
+        if ($excludeBirthday) {
+            $query->andWhere($query->expr()->neq('uri', $query->createNamedParameter(BirthdayService::BIRTHDAY_CALENDAR_URI)));
+        }
+
+        return (int)$query->execute()->fetchColumn();
+    }
+
+    /**
+     * Returns a list of calendars for a principal.
+     *
+     * Every project is an array with the following keys:
+     *  * id, a unique id that will be used by other functions to modify the
+     *    calendar. This can be the same as the uri or a database key.
+     *  * uri, which the basename of the uri with which the calendar is
+     *    accessed.
+     *  * principaluri. The owner of the calendar. Almost always the same as
+     *    principalUri passed to this method.
+     *
+     * Furthermore it can contain webdav properties in clark notation. A very
+     * common one is '{DAV:}displayname'.
+     *
+     * Many clients also require:
+     * {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
+     * For this property, you can just return an instance of
+     * Sabre\CalDAV\Property\SupportedCalendarComponentSet.
+     *
+     * If you return {http://sabredav.org/ns}read-only and set the value to 1,
+     * ACL will automatically be put in read-only mode.
+     *
+     * @param string $principalUri
+     * @return array
+     */
+    public function getCalendarsForUser($principalUri) {
+        $principalUriOriginal = $principalUri;
+        $principalUri = $this->convertPrincipal($principalUri, true);
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'id';
+        $fields[] = 'uri';
+        $fields[] = 'synctoken';
+        $fields[] = 'components';
+        $fields[] = 'principaluri';
+        $fields[] = 'transparent';
+
+        // Making fields a comma-delimited list
+        $query = $this->db->getQueryBuilder();
+        $query->select($fields)->from('calendars')
+                ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+                ->orderBy('calendarorder', 'ASC');
+        $stmt = $query->execute();
+
+        $calendars = [];
+        while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            $components = [];
+            if ($row['components']) {
+                $components = explode(',',$row['components']);
+            }
+
+            $calendar = [
+                'id' => $row['id'],
+                'uri' => $row['uri'],
+                'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+                '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+                '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+                '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+                '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
+            ];
+
+            foreach ($this->propertyMap as $xmlName=>$dbName) {
+                $calendar[$xmlName] = $row[$dbName];
+            }
+
+            $this->addOwnerPrincipal($calendar);
+
+            if (!isset($calendars[$calendar['id']])) {
+                $calendars[$calendar['id']] = $calendar;
+            }
+        }
+
+        $stmt->closeCursor();
+
+        // query for shared calendars
+        $principals = $this->principalBackend->getGroupMembership($principalUriOriginal, true);
+        $principals = array_merge($principals, $this->principalBackend->getCircleMembership($principalUriOriginal));
+
+        $principals = array_map(function ($principal) {
+            return urldecode($principal);
+        }, $principals);
+        $principals[]= $principalUri;
+
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'a.id';
+        $fields[] = 'a.uri';
+        $fields[] = 'a.synctoken';
+        $fields[] = 'a.components';
+        $fields[] = 'a.principaluri';
+        $fields[] = 'a.transparent';
+        $fields[] = 's.access';
+        $query = $this->db->getQueryBuilder();
+        $result = $query->select($fields)
+            ->from('dav_shares', 's')
+            ->join('s', 'calendars', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
+            ->where($query->expr()->in('s.principaluri', $query->createParameter('principaluri')))
+            ->andWhere($query->expr()->eq('s.type', $query->createParameter('type')))
+            ->setParameter('type', 'calendar')
+            ->setParameter('principaluri', $principals, \Doctrine\DBAL\Connection::PARAM_STR_ARRAY)
+            ->execute();
+
+        $readOnlyPropertyName = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only';
+        while ($row = $result->fetch()) {
+            if ($row['principaluri'] === $principalUri) {
+                continue;
+            }
+
+            $readOnly = (int) $row['access'] === Backend::ACCESS_READ;
+            if (isset($calendars[$row['id']])) {
+                if ($readOnly) {
+                    // New share can not have more permissions then the old one.
+                    continue;
+                }
+                if (isset($calendars[$row['id']][$readOnlyPropertyName]) &&
+                    $calendars[$row['id']][$readOnlyPropertyName] === 0) {
+                    // Old share is already read-write, no more permissions can be gained
+                    continue;
+                }
+            }
+
+            list(, $name) = Uri\split($row['principaluri']);
+            $uri = $row['uri'] . '_shared_by_' . $name;
+            $row['displayname'] = $row['displayname'] . ' (' . $this->getUserDisplayName($name) . ')';
+            $components = [];
+            if ($row['components']) {
+                $components = explode(',',$row['components']);
+            }
+            $calendar = [
+                'id' => $row['id'],
+                'uri' => $uri,
+                'principaluri' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
+                '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+                '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+                '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp('transparent'),
+                '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+                $readOnlyPropertyName => $readOnly,
+            ];
+
+            foreach ($this->propertyMap as $xmlName=>$dbName) {
+                $calendar[$xmlName] = $row[$dbName];
+            }
+
+            $this->addOwnerPrincipal($calendar);
+
+            $calendars[$calendar['id']] = $calendar;
+        }
+        $result->closeCursor();
+
+        return array_values($calendars);
+    }
+
+    /**
+     * @param $principalUri
+     * @return array
+     */
+    public function getUsersOwnCalendars($principalUri) {
+        $principalUri = $this->convertPrincipal($principalUri, true);
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'id';
+        $fields[] = 'uri';
+        $fields[] = 'synctoken';
+        $fields[] = 'components';
+        $fields[] = 'principaluri';
+        $fields[] = 'transparent';
+        // Making fields a comma-delimited list
+        $query = $this->db->getQueryBuilder();
+        $query->select($fields)->from('calendars')
+            ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+            ->orderBy('calendarorder', 'ASC');
+        $stmt = $query->execute();
+        $calendars = [];
+        while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            $components = [];
+            if ($row['components']) {
+                $components = explode(',',$row['components']);
+            }
+            $calendar = [
+                'id' => $row['id'],
+                'uri' => $row['uri'],
+                'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+                '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+                '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+                '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+            ];
+            foreach ($this->propertyMap as $xmlName=>$dbName) {
+                $calendar[$xmlName] = $row[$dbName];
+            }
+
+            $this->addOwnerPrincipal($calendar);
+
+            if (!isset($calendars[$calendar['id']])) {
+                $calendars[$calendar['id']] = $calendar;
+            }
+        }
+        $stmt->closeCursor();
+        return array_values($calendars);
+    }
+
+
+    /**
+     * @param $uid
+     * @return string
+     */
+    private function getUserDisplayName($uid) {
+        if (!isset($this->userDisplayNames[$uid])) {
+            $user = $this->userManager->get($uid);
+
+            if ($user instanceof IUser) {
+                $this->userDisplayNames[$uid] = $user->getDisplayName();
+            } else {
+                $this->userDisplayNames[$uid] = $uid;
+            }
+        }
+
+        return $this->userDisplayNames[$uid];
+    }
+
+    /**
+     * @return array
+     */
+    public function getPublicCalendars() {
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'a.id';
+        $fields[] = 'a.uri';
+        $fields[] = 'a.synctoken';
+        $fields[] = 'a.components';
+        $fields[] = 'a.principaluri';
+        $fields[] = 'a.transparent';
+        $fields[] = 's.access';
+        $fields[] = 's.publicuri';
+        $calendars = [];
+        $query = $this->db->getQueryBuilder();
+        $result = $query->select($fields)
+            ->from('dav_shares', 's')
+            ->join('s', 'calendars', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
+            ->where($query->expr()->in('s.access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
+            ->andWhere($query->expr()->eq('s.type', $query->createNamedParameter('calendar')))
+            ->execute();
+
+        while ($row = $result->fetch()) {
+            list(, $name) = Uri\split($row['principaluri']);
+            $row['displayname'] = $row['displayname'] . "($name)";
+            $components = [];
+            if ($row['components']) {
+                $components = explode(',',$row['components']);
+            }
+            $calendar = [
+                'id' => $row['id'],
+                'uri' => $row['publicuri'],
+                'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+                '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+                '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+                '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+                '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], $this->legacyEndpoint),
+                '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
+                '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}public' => (int)$row['access'] === self::ACCESS_PUBLIC,
+            ];
+
+            foreach ($this->propertyMap as $xmlName=>$dbName) {
+                $calendar[$xmlName] = $row[$dbName];
+            }
+
+            $this->addOwnerPrincipal($calendar);
+
+            if (!isset($calendars[$calendar['id']])) {
+                $calendars[$calendar['id']] = $calendar;
+            }
+        }
+        $result->closeCursor();
+
+        return array_values($calendars);
+    }
+
+    /**
+     * @param string $uri
+     * @return array
+     * @throws NotFound
+     */
+    public function getPublicCalendar($uri) {
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'a.id';
+        $fields[] = 'a.uri';
+        $fields[] = 'a.synctoken';
+        $fields[] = 'a.components';
+        $fields[] = 'a.principaluri';
+        $fields[] = 'a.transparent';
+        $fields[] = 's.access';
+        $fields[] = 's.publicuri';
+        $query = $this->db->getQueryBuilder();
+        $result = $query->select($fields)
+            ->from('dav_shares', 's')
+            ->join('s', 'calendars', 'a', $query->expr()->eq('s.resourceid', 'a.id'))
+            ->where($query->expr()->in('s.access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
+            ->andWhere($query->expr()->eq('s.type', $query->createNamedParameter('calendar')))
+            ->andWhere($query->expr()->eq('s.publicuri', $query->createNamedParameter($uri)))
+            ->execute();
+
+        $row = $result->fetch(\PDO::FETCH_ASSOC);
+
+        $result->closeCursor();
+
+        if ($row === false) {
+            throw new NotFound('Node with name \'' . $uri . '\' could not be found');
+        }
+
+        list(, $name) = Uri\split($row['principaluri']);
+        $row['displayname'] = $row['displayname'] . ' ' . "($name)";
+        $components = [];
+        if ($row['components']) {
+            $components = explode(',',$row['components']);
+        }
+        $calendar = [
+            'id' => $row['id'],
+            'uri' => $row['publicuri'],
+            'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+            '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+            '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+            '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+            '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+            '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+            '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
+            '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}public' => (int)$row['access'] === self::ACCESS_PUBLIC,
+        ];
+
+        foreach ($this->propertyMap as $xmlName=>$dbName) {
+            $calendar[$xmlName] = $row[$dbName];
+        }
+
+        $this->addOwnerPrincipal($calendar);
+
+        return $calendar;
+    }
+
+    /**
+     * @param string $principal
+     * @param string $uri
+     * @return array|null
+     */
+    public function getCalendarByUri($principal, $uri) {
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'id';
+        $fields[] = 'uri';
+        $fields[] = 'synctoken';
+        $fields[] = 'components';
+        $fields[] = 'principaluri';
+        $fields[] = 'transparent';
+
+        // Making fields a comma-delimited list
+        $query = $this->db->getQueryBuilder();
+        $query->select($fields)->from('calendars')
+            ->where($query->expr()->eq('uri', $query->createNamedParameter($uri)))
+            ->andWhere($query->expr()->eq('principaluri', $query->createNamedParameter($principal)))
+            ->setMaxResults(1);
+        $stmt = $query->execute();
+
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+        $stmt->closeCursor();
+        if ($row === false) {
+            return null;
+        }
+
+        $components = [];
+        if ($row['components']) {
+            $components = explode(',',$row['components']);
+        }
+
+        $calendar = [
+            'id' => $row['id'],
+            'uri' => $row['uri'],
+            'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+            '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+            '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+            '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+            '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+        ];
+
+        foreach ($this->propertyMap as $xmlName=>$dbName) {
+            $calendar[$xmlName] = $row[$dbName];
+        }
+
+        $this->addOwnerPrincipal($calendar);
+
+        return $calendar;
+    }
+
+    /**
+     * @param $calendarId
+     * @return array|null
+     */
+    public function getCalendarById($calendarId) {
+        $fields = array_values($this->propertyMap);
+        $fields[] = 'id';
+        $fields[] = 'uri';
+        $fields[] = 'synctoken';
+        $fields[] = 'components';
+        $fields[] = 'principaluri';
+        $fields[] = 'transparent';
+
+        // Making fields a comma-delimited list
+        $query = $this->db->getQueryBuilder();
+        $query->select($fields)->from('calendars')
+            ->where($query->expr()->eq('id', $query->createNamedParameter($calendarId)))
+            ->setMaxResults(1);
+        $stmt = $query->execute();
+
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+        $stmt->closeCursor();
+        if ($row === false) {
+            return null;
+        }
+
+        $components = [];
+        if ($row['components']) {
+            $components = explode(',',$row['components']);
+        }
+
+        $calendar = [
+            'id' => $row['id'],
+            'uri' => $row['uri'],
+            'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+            '{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
+            '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+            '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+            '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+        ];
+
+        foreach ($this->propertyMap as $xmlName=>$dbName) {
+            $calendar[$xmlName] = $row[$dbName];
+        }
+
+        $this->addOwnerPrincipal($calendar);
+
+        return $calendar;
+    }
+
+    /**
+     * @param $subscriptionId
+     */
+    public function getSubscriptionById($subscriptionId) {
+        $fields = array_values($this->subscriptionPropertyMap);
+        $fields[] = 'id';
+        $fields[] = 'uri';
+        $fields[] = 'source';
+        $fields[] = 'synctoken';
+        $fields[] = 'principaluri';
+        $fields[] = 'lastmodified';
+
+        $query = $this->db->getQueryBuilder();
+        $query->select($fields)
+            ->from('calendarsubscriptions')
+            ->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
+            ->orderBy('calendarorder', 'asc');
+        $stmt =$query->execute();
+
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+        $stmt->closeCursor();
+        if ($row === false) {
+            return null;
+        }
+
+        $subscription = [
+            'id'           => $row['id'],
+            'uri'          => $row['uri'],
+            'principaluri' => $row['principaluri'],
+            'source'       => $row['source'],
+            'lastmodified' => $row['lastmodified'],
+            '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
+            '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+        ];
+
+        foreach ($this->subscriptionPropertyMap as $xmlName=>$dbName) {
+            if (!is_null($row[$dbName])) {
+                $subscription[$xmlName] = $row[$dbName];
+            }
+        }
+
+        return $subscription;
+    }
+
+    /**
+     * Creates a new calendar for a principal.
+     *
+     * If the creation was a success, an id must be returned that can be used to reference
+     * this calendar in other methods, such as updateCalendar.
+     *
+     * @param string $principalUri
+     * @param string $calendarUri
+     * @param array $properties
+     * @return int
+     */
+    public function createCalendar($principalUri, $calendarUri, array $properties) {
+        $values = [
+            'principaluri' => $this->convertPrincipal($principalUri, true),
+            'uri'          => $calendarUri,
+            'synctoken'    => 1,
+            'transparent'  => 0,
+            'components'   => 'VEVENT,VTODO',
+            'displayname'  => $calendarUri
+        ];
+
+        // Default value
+        $sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
+        if (isset($properties[$sccs])) {
+            if (!($properties[$sccs] instanceof SupportedCalendarComponentSet)) {
+                throw new DAV\Exception('The ' . $sccs . ' property must be of type: \Sabre\CalDAV\Property\SupportedCalendarComponentSet');
+            }
+            $values['components'] = implode(',',$properties[$sccs]->getValue());
+        } elseif (isset($properties['components'])) {
+            // Allow to provide components internally without having
+            // to create a SupportedCalendarComponentSet object
+            $values['components'] = $properties['components'];
+        }
+
+        $transp = '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp';
+        if (isset($properties[$transp])) {
+            $values['transparent'] = (int) ($properties[$transp]->getValue() === 'transparent');
+        }
+
+        foreach ($this->propertyMap as $xmlName=>$dbName) {
+            if (isset($properties[$xmlName])) {
+                $values[$dbName] = $properties[$xmlName];
+            }
+        }
+
+        $query = $this->db->getQueryBuilder();
+        $query->insert('calendars');
+        foreach ($values as $column => $value) {
+            $query->setValue($column, $query->createNamedParameter($value));
+        }
+        $query->execute();
+        $calendarId = $query->getLastInsertId();
+
+        $calendarData = $this->getCalendarById($calendarId);
+        $this->dispatcher->dispatchTyped(new CalendarCreatedEvent((int)$calendarId, $calendarData));
+        $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendar', new GenericEvent(
+            '\OCA\DAV\CalDAV\CalDavBackend::createCalendar',
+            [
+                'calendarId' => $calendarId,
+                'calendarData' => $calendarData,
+            ]));
+
+        return $calendarId;
+    }
+
+    /**
+     * Updates properties for a calendar.
+     *
+     * The list of mutations is stored in a Sabre\DAV\PropPatch object.
+     * To do the actual updates, you must tell this object which properties
+     * you're going to process with the handle() method.
+     *
+     * Calling the handle method is like telling the PropPatch object "I
+     * promise I can handle updating this property".
+     *
+     * Read the PropPatch documentation for more info and examples.
+     *
+     * @param mixed $calendarId
+     * @param PropPatch $propPatch
+     * @return void
+     */
+    public function updateCalendar($calendarId, PropPatch $propPatch) {
+        $supportedProperties = array_keys($this->propertyMap);
+        $supportedProperties[] = '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp';
+
+        $propPatch->handle($supportedProperties, function ($mutations) use ($calendarId) {
+            $newValues = [];
+            foreach ($mutations as $propertyName => $propertyValue) {
+                switch ($propertyName) {
+                    case '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp':
+                        $fieldName = 'transparent';
+                        $newValues[$fieldName] = (int) ($propertyValue->getValue() === 'transparent');
+                        break;
+                    default:
+                        $fieldName = $this->propertyMap[$propertyName];
+                        $newValues[$fieldName] = $propertyValue;
+                        break;
+                }
+            }
+            $query = $this->db->getQueryBuilder();
+            $query->update('calendars');
+            foreach ($newValues as $fieldName => $value) {
+                $query->set($fieldName, $query->createNamedParameter($value));
+            }
+            $query->where($query->expr()->eq('id', $query->createNamedParameter($calendarId)));
+            $query->execute();
+
+            $this->addChange($calendarId, "", 2);
+
+            $calendarData = $this->getCalendarById($calendarId);
+            $shares = $this->getShares($calendarId);
+            $this->dispatcher->dispatchTyped(new CalendarUpdatedEvent((int)$calendarId, $calendarData, $shares, $mutations));
+            $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendar', new GenericEvent(
+                '\OCA\DAV\CalDAV\CalDavBackend::updateCalendar',
+                [
+                    'calendarId' => $calendarId,
+                    'calendarData' => $calendarData,
+                    'shares' => $shares,
+                    'propertyMutations' => $mutations,
+                ]));
+
+            return true;
+        });
+    }
+
+    /**
+     * Delete a calendar and all it's objects
+     *
+     * @param mixed $calendarId
+     * @return void
+     */
+    public function deleteCalendar($calendarId) {
+        $calendarData = $this->getCalendarById($calendarId);
+        $shares = $this->getShares($calendarId);
+
+        $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar', new GenericEvent(
+            '\OCA\DAV\CalDAV\CalDavBackend::deleteCalendar',
+            [
+                'calendarId' => $calendarId,
+                'calendarData' => $calendarData,
+                'shares' => $shares,
+            ]));
+
+        $stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ? AND `calendartype` = ?');
+        $stmt->execute([$calendarId, self::CALENDAR_TYPE_CALENDAR]);
+
+        $stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendars` WHERE `id` = ?');
+        $stmt->execute([$calendarId]);
+
+        $stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarchanges` WHERE `calendarid` = ? AND `calendartype` = ?');
+        $stmt->execute([$calendarId, self::CALENDAR_TYPE_CALENDAR]);
+
+        $this->calendarSharingBackend->deleteAllShares($calendarId);
+
+        $query = $this->db->getQueryBuilder();
+        $query->delete($this->dbObjectPropertiesTable)
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)))
+            ->execute();
+
+        if ($calendarData) {
+            $this->dispatcher->dispatchTyped(new CalendarDeletedEvent((int)$calendarId, $calendarData, $shares));
+        }
+    }
+
+    /**
+     * Delete all of an user's shares
+     *
+     * @param string $principaluri
+     * @return void
+     */
+    public function deleteAllSharesByUser($principaluri) {
+        $this->calendarSharingBackend->deleteAllSharesByUser($principaluri);
+    }
+
+    /**
+     * Returns all calendar objects within a calendar.
+     *
+     * Every item contains an array with the following keys:
+     *   * calendardata - The iCalendar-compatible calendar data
+     *   * uri - a unique key which will be used to construct the uri. This can
+     *     be any arbitrary string, but making sure it ends with '.ics' is a
+     *     good idea. This is only the basename, or filename, not the full
+     *     path.
+     *   * lastmodified - a timestamp of the last modification time
+     *   * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
+     *   '"abcdef"')
+     *   * size - The size of the calendar objects, in bytes.
+     *   * component - optional, a string containing the type of object, such
+     *     as 'vevent' or 'vtodo'. If specified, this will be used to populate
+     *     the Content-Type header.
+     *
+     * Note that the etag is optional, but it's highly encouraged to return for
+     * speed reasons.
+     *
+     * The calendardata is also optional. If it's not returned
+     * 'getCalendarObject' will be called later, which *is* expected to return
+     * calendardata.
+     *
+     * If neither etag or size are specified, the calendardata will be
+     * used/fetched to determine these numbers. If both are specified the
+     * amount of times this is needed is reduced by a great degree.
+     *
+     * @param mixed $calendarId
+     * @param int $calendarType
+     * @return array
+     */
+    public function getCalendarObjects($calendarId, $calendarType=self::CALENDAR_TYPE_CALENDAR):array {
+        $query = $this->db->getQueryBuilder();
+        $query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'componenttype', 'classification'])
+            ->from('calendarobjects')
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter($calendarType)));
+        $stmt = $query->execute();
+
+        $result = [];
+        foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
+            $result[] = [
+                'id'           => $row['id'],
+                'uri'          => $row['uri'],
+                'lastmodified' => $row['lastmodified'],
+                'etag'         => '"' . $row['etag'] . '"',
+                'calendarid'   => $row['calendarid'],
+                'size'         => (int)$row['size'],
+                'component'    => strtolower($row['componenttype']),
+                'classification'=> (int)$row['classification']
+            ];
+        }
+
+        return $result;
+    }
+
+    /**
+     * Returns information from a single calendar object, based on it's object
+     * uri.
+     *
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * The returned array must have the same keys as getCalendarObjects. The
+     * 'calendardata' object is required here though, while it's not required
+     * for getCalendarObjects.
+     *
+     * This method must return null if the object did not exist.
+     *
+     * @param mixed $calendarId
+     * @param string $objectUri
+     * @param int $calendarType
+     * @return array|null
+     */
+    public function getCalendarObject($calendarId, $objectUri, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+        $query = $this->db->getQueryBuilder();
+        $query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'calendardata', 'componenttype', 'classification'])
+            ->from('calendarobjects')
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
+            ->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter($calendarType)));
+        $stmt = $query->execute();
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+
+        if (!$row) {
+            return null;
+        }
+
+        return [
+            'id'            => $row['id'],
+            'uri'           => $row['uri'],
+            'lastmodified'  => $row['lastmodified'],
+            'etag'          => '"' . $row['etag'] . '"',
+            'calendarid'    => $row['calendarid'],
+            'size'          => (int)$row['size'],
+            'calendardata'  => $this->readBlob($row['calendardata']),
+            'component'     => strtolower($row['componenttype']),
+            'classification'=> (int)$row['classification']
+        ];
+    }
+
+    /**
+     * Returns a list of calendar objects.
+     *
+     * This method should work identical to getCalendarObject, but instead
+     * return all the calendar objects in the list as an array.
+     *
+     * If the backend supports this, it may allow for some speed-ups.
+     *
+     * @param mixed $calendarId
+     * @param string[] $uris
+     * @param int $calendarType
+     * @return array
+     */
+    public function getMultipleCalendarObjects($calendarId, array $uris, $calendarType=self::CALENDAR_TYPE_CALENDAR):array {
+        if (empty($uris)) {
+            return [];
+        }
+
+        $chunks = array_chunk($uris, 100);
+        $objects = [];
+
+        $query = $this->db->getQueryBuilder();
+        $query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'calendardata', 'componenttype', 'classification'])
+            ->from('calendarobjects')
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
+            ->andWhere($query->expr()->in('uri', $query->createParameter('uri')))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter($calendarType)));
+
+        foreach ($chunks as $uris) {
+            $query->setParameter('uri', $uris, IQueryBuilder::PARAM_STR_ARRAY);
+            $result = $query->execute();
+
+            while ($row = $result->fetch()) {
+                $objects[] = [
+                    'id'           => $row['id'],
+                    'uri'          => $row['uri'],
+                    'lastmodified' => $row['lastmodified'],
+                    'etag'         => '"' . $row['etag'] . '"',
+                    'calendarid'   => $row['calendarid'],
+                    'size'         => (int)$row['size'],
+                    'calendardata' => $this->readBlob($row['calendardata']),
+                    'component'    => strtolower($row['componenttype']),
+                    'classification' => (int)$row['classification']
+                ];
+            }
+            $result->closeCursor();
+        }
+
+        return $objects;
+    }
+
+    /**
+     * Creates a new calendar object.
+     *
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * It is possible return an etag from this function, which will be used in
+     * the response to this PUT request. Note that the ETag must be surrounded
+     * by double-quotes.
+     *
+     * However, you should only really return this ETag if you don't mangle the
+     * calendar-data. If the result of a subsequent GET to this object is not
+     * the exact same as this request body, you should omit the ETag.
+     *
+     * @param mixed $calendarId
+     * @param string $objectUri
+     * @param string $calendarData
+     * @param int $calendarType
+     * @return string
+     */
+    public function createCalendarObject($calendarId, $objectUri, $calendarData, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+        $extraData = $this->getDenormalizedData($calendarData);
+
+        $q = $this->db->getQueryBuilder();
+        $q->select($q->func()->count('*'))
+            ->from('calendarobjects')
+            ->where($q->expr()->eq('calendarid', $q->createNamedParameter($calendarId)))
+            ->andWhere($q->expr()->eq('uid', $q->createNamedParameter($extraData['uid'])))
+            ->andWhere($q->expr()->eq('calendartype', $q->createNamedParameter($calendarType)));
+
+        $result = $q->execute();
+        $count = (int) $result->fetchColumn();
+        $result->closeCursor();
+
+        if ($count !== 0) {
+            throw new \Sabre\DAV\Exception\BadRequest('Calendar object with uid already exists in this calendar collection.');
+        }
+
+        $query = $this->db->getQueryBuilder();
+        $query->insert('calendarobjects')
+            ->values([
+                'calendarid' => $query->createNamedParameter($calendarId),
+                'uri' => $query->createNamedParameter($objectUri),
+                'calendardata' => $query->createNamedParameter($calendarData, IQueryBuilder::PARAM_LOB),
+                'lastmodified' => $query->createNamedParameter(time()),
+                'etag' => $query->createNamedParameter($extraData['etag']),
+                'size' => $query->createNamedParameter($extraData['size']),
+                'componenttype' => $query->createNamedParameter($extraData['componentType']),
+                'firstoccurence' => $query->createNamedParameter($extraData['firstOccurence']),
+                'lastoccurence' => $query->createNamedParameter($extraData['lastOccurence']),
+                'classification' => $query->createNamedParameter($extraData['classification']),
+                'uid' => $query->createNamedParameter($extraData['uid']),
+                'calendartype' => $query->createNamedParameter($calendarType),
+            ])
+            ->execute();
+
+        $this->updateProperties($calendarId, $objectUri, $calendarData, $calendarType);
+        $this->addChange($calendarId, $objectUri, 1, $calendarType);
+
+        $objectRow = $this->getCalendarObject($calendarId, $objectUri, $calendarType);
+        if ($calendarType === self::CALENDAR_TYPE_CALENDAR) {
+            $calendarRow = $this->getCalendarById($calendarId);
+            $shares = $this->getShares($calendarId);
+
+            $this->dispatcher->dispatchTyped(new CalendarObjectCreatedEvent((int)$calendarId, $calendarRow, $shares, $objectRow));
+            $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject', new GenericEvent(
+                '\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject',
+                [
+                    'calendarId' => $calendarId,
+                    'calendarData' => $calendarRow,
+                    'shares' => $shares,
+                    'objectData' => $objectRow,
+                ]
+            ));
+        } else {
+            $subscriptionRow = $this->getSubscriptionById($calendarId);
+
+            $this->dispatcher->dispatchTyped(new CachedCalendarObjectCreatedEvent((int)$calendarId, $subscriptionRow, [], $objectRow));
+            $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCachedCalendarObject', new GenericEvent(
+                '\OCA\DAV\CalDAV\CalDavBackend::createCachedCalendarObject',
+                [
+                    'subscriptionId' => $calendarId,
+                    'calendarData' => $subscriptionRow,
+                    'shares' => [],
+                    'objectData' => $objectRow,
+                ]
+            ));
+        }
+
+        return '"' . $extraData['etag'] . '"';
+    }
+
+    /**
+     * Updates an existing calendarobject, based on it's uri.
+     *
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * It is possible return an etag from this function, which will be used in
+     * the response to this PUT request. Note that the ETag must be surrounded
+     * by double-quotes.
+     *
+     * However, you should only really return this ETag if you don't mangle the
+     * calendar-data. If the result of a subsequent GET to this object is not
+     * the exact same as this request body, you should omit the ETag.
+     *
+     * @param mixed $calendarId
+     * @param string $objectUri
+     * @param string $calendarData
+     * @param int $calendarType
+     * @return string
+     */
+    public function updateCalendarObject($calendarId, $objectUri, $calendarData, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+        $extraData = $this->getDenormalizedData($calendarData);
+        $query = $this->db->getQueryBuilder();
+        $query->update('calendarobjects')
+                ->set('calendardata', $query->createNamedParameter($calendarData, IQueryBuilder::PARAM_LOB))
+                ->set('lastmodified', $query->createNamedParameter(time()))
+                ->set('etag', $query->createNamedParameter($extraData['etag']))
+                ->set('size', $query->createNamedParameter($extraData['size']))
+                ->set('componenttype', $query->createNamedParameter($extraData['componentType']))
+                ->set('firstoccurence', $query->createNamedParameter($extraData['firstOccurence']))
+                ->set('lastoccurence', $query->createNamedParameter($extraData['lastOccurence']))
+                ->set('classification', $query->createNamedParameter($extraData['classification']))
+                ->set('uid', $query->createNamedParameter($extraData['uid']))
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
+            ->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter($calendarType)))
+            ->execute();
+
+        $this->updateProperties($calendarId, $objectUri, $calendarData, $calendarType);
+        $this->addChange($calendarId, $objectUri, 2, $calendarType);
+
+        $objectRow = $this->getCalendarObject($calendarId, $objectUri, $calendarType);
+        if (is_array($objectRow)) {
+            if ($calendarType === self::CALENDAR_TYPE_CALENDAR) {
+                $calendarRow = $this->getCalendarById($calendarId);
+                $shares = $this->getShares($calendarId);
+
+                $this->dispatcher->dispatchTyped(new CalendarObjectUpdatedEvent((int)$calendarId, $calendarRow, $shares, $objectRow));
+                $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject', new GenericEvent(
+                    '\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject',
+                    [
+                        'calendarId' => $calendarId,
+                        'calendarData' => $calendarRow,
+                        'shares' => $shares,
+                        'objectData' => $objectRow,
+                    ]
+                ));
+            } else {
+                $subscriptionRow = $this->getSubscriptionById($calendarId);
+
+                $this->dispatcher->dispatchTyped(new CachedCalendarObjectUpdatedEvent((int)$calendarId, $subscriptionRow, [], $objectRow));
+                $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCachedCalendarObject', new GenericEvent(
+                    '\OCA\DAV\CalDAV\CalDavBackend::updateCachedCalendarObject',
+                    [
+                        'subscriptionId' => $calendarId,
+                        'calendarData' => $subscriptionRow,
+                        'shares' => [],
+                        'objectData' => $objectRow,
+                    ]
+                ));
+            }
+        }
+
+        return '"' . $extraData['etag'] . '"';
+    }
+
+    /**
+     * @param int $calendarObjectId
+     * @param int $classification
+     */
+    public function setClassification($calendarObjectId, $classification) {
+        if (!in_array($classification, [
+            self::CLASSIFICATION_PUBLIC, self::CLASSIFICATION_PRIVATE, self::CLASSIFICATION_CONFIDENTIAL
+        ])) {
+            throw new \InvalidArgumentException();
+        }
+        $query = $this->db->getQueryBuilder();
+        $query->update('calendarobjects')
+            ->set('classification', $query->createNamedParameter($classification))
+            ->where($query->expr()->eq('id', $query->createNamedParameter($calendarObjectId)))
+            ->execute();
+    }
+
+    /**
+     * Deletes an existing calendar object.
+     *
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * @param mixed $calendarId
+     * @param string $objectUri
+     * @param int $calendarType
+     * @return void
+     */
+    public function deleteCalendarObject($calendarId, $objectUri, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+        $data = $this->getCalendarObject($calendarId, $objectUri, $calendarType);
+        if (is_array($data)) {
+            if ($calendarType === self::CALENDAR_TYPE_CALENDAR) {
+                $calendarRow = $this->getCalendarById($calendarId);
+                $shares = $this->getShares($calendarId);
+
+                $this->dispatcher->dispatchTyped(new CalendarObjectDeletedEvent((int)$calendarId, $calendarRow, $shares, $data));
+                $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject', new GenericEvent(
+                    '\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject',
+                    [
+                        'calendarId' => $calendarId,
+                        'calendarData' => $calendarRow,
+                        'shares' => $shares,
+                        'objectData' => $data,
+                    ]
+                ));
+            } else {
+                $subscriptionRow = $this->getSubscriptionById($calendarId);
+
+                $this->dispatcher->dispatchTyped(new CachedCalendarObjectDeletedEvent((int)$calendarId, $subscriptionRow, [], $data));
+                $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCachedCalendarObject', new GenericEvent(
+                    '\OCA\DAV\CalDAV\CalDavBackend::deleteCachedCalendarObject',
+                    [
+                        'subscriptionId' => $calendarId,
+                        'calendarData' => $subscriptionRow,
+                        'shares' => [],
+                        'objectData' => $data,
+                    ]
+                ));
+            }
+        }
+
+        $stmt = $this->db->prepare('DELETE FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ? AND `uri` = ? AND `calendartype` = ?');
+        $stmt->execute([$calendarId, $objectUri, $calendarType]);
+
+        if (is_array($data)) {
+            $this->purgeProperties($calendarId, $data['id'], $calendarType);
+        }
+
+        $this->addChange($calendarId, $objectUri, 3, $calendarType);
+    }
+
+    /**
+     * Performs a calendar-query on the contents of this calendar.
+     *
+     * The calendar-query is defined in RFC4791 : CalDAV. Using the
+     * calendar-query it is possible for a client to request a specific set of
+     * object, based on contents of iCalendar properties, date-ranges and
+     * iCalendar component types (VTODO, VEVENT).
+     *
+     * This method should just return a list of (relative) urls that match this
+     * query.
+     *
+     * The list of filters are specified as an array. The exact array is
+     * documented by Sabre\CalDAV\CalendarQueryParser.
+     *
+     * Note that it is extremely likely that getCalendarObject for every path
+     * returned from this method will be called almost immediately after. You
+     * may want to anticipate this to speed up these requests.
+     *
+     * This method provides a default implementation, which parses *all* the
+     * iCalendar objects in the specified calendar.
+     *
+     * This default may well be good enough for personal use, and calendars
+     * that aren't very large. But if you anticipate high usage, big calendars
+     * or high loads, you are strongly advised to optimize certain paths.
+     *
+     * The best way to do so is override this method and to optimize
+     * specifically for 'common filters'.
+     *
+     * Requests that are extremely common are:
+     *   * requests for just VEVENTS
+     *   * requests for just VTODO
+     *   * requests with a time-range-filter on either VEVENT or VTODO.
+     *
+     * ..and combinations of these requests. It may not be worth it to try to
+     * handle every possible situation and just rely on the (relatively
+     * easy to use) CalendarQueryValidator to handle the rest.
+     *
+     * Note that especially time-range-filters may be difficult to parse. A
+     * time-range filter specified on a VEVENT must for instance also handle
+     * recurrence rules correctly.
+     * A good example of how to interprete all these filters can also simply
+     * be found in Sabre\CalDAV\CalendarQueryFilter. This class is as correct
+     * as possible, so it gives you a good idea on what type of stuff you need
+     * to think of.
+     *
+     * @param mixed $calendarId
+     * @param array $filters
+     * @param int $calendarType
+     * @return array
+     */
+    public function calendarQuery($calendarId, array $filters, $calendarType=self::CALENDAR_TYPE_CALENDAR):array {
+        $componentType = null;
+        $requirePostFilter = true;
+        $timeRange = null;
+
+        // if no filters were specified, we don't need to filter after a query
+        if (!$filters['prop-filters'] && !$filters['comp-filters']) {
+            $requirePostFilter = false;
+        }
+
+        // Figuring out if there's a component filter
+        if (count($filters['comp-filters']) > 0 && !$filters['comp-filters'][0]['is-not-defined']) {
+            $componentType = $filters['comp-filters'][0]['name'];
+
+            // Checking if we need post-filters
+            if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['time-range'] && !$filters['comp-filters'][0]['prop-filters']) {
+                $requirePostFilter = false;
+            }
+            // There was a time-range filter
+            if ($componentType === 'VEVENT' && isset($filters['comp-filters'][0]['time-range'])) {
+                $timeRange = $filters['comp-filters'][0]['time-range'];
+
+                // If start time OR the end time is not specified, we can do a
+                // 100% accurate mysql query.
+                if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['prop-filters'] && (!$timeRange['start'] || !$timeRange['end'])) {
+                    $requirePostFilter = false;
+                }
+            }
+        }
+        $columns = ['uri'];
+        if ($requirePostFilter) {
+            $columns = ['uri', 'calendardata'];
+        }
+        $query = $this->db->getQueryBuilder();
+        $query->select($columns)
+            ->from('calendarobjects')
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter($calendarType)));
+
+        if ($componentType) {
+            $query->andWhere($query->expr()->eq('componenttype', $query->createNamedParameter($componentType)));
+        }
+
+        if ($timeRange && $timeRange['start']) {
+            $query->andWhere($query->expr()->gt('lastoccurence', $query->createNamedParameter($timeRange['start']->getTimeStamp())));
+        }
+        if ($timeRange && $timeRange['end']) {
+            $query->andWhere($query->expr()->lt('firstoccurence', $query->createNamedParameter($timeRange['end']->getTimeStamp())));
+        }
+
+        $stmt = $query->execute();
+
+        $result = [];
+        while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            if ($requirePostFilter) {
+                // validateFilterForObject will parse the calendar data
+                // catch parsing errors
+                try {
+                    $matches = $this->validateFilterForObject($row, $filters);
+                } catch (ParseException $ex) {
+                    $this->logger->logException($ex, [
+                        'app' => 'dav',
+                        'message' => 'Caught parsing exception for calendar data. This usually indicates invalid calendar data. calendar-id:'.$calendarId.' uri:'.$row['uri']
+                    ]);
+                    continue;
+                } catch (InvalidDataException $ex) {
+                    $this->logger->logException($ex, [
+                        'app' => 'dav',
+                        'message' => 'Caught invalid data exception for calendar data. This usually indicates invalid calendar data. calendar-id:'.$calendarId.' uri:'.$row['uri']
+                    ]);
+                    continue;
+                }
+
+                if (!$matches) {
+                    continue;
+                }
+            }
+            $result[] = $row['uri'];
+        }
+
+        return $result;
+    }
+
+    /**
+     * custom Nextcloud search extension for CalDAV
+     *
+     * TODO - this should optionally cover cached calendar objects as well
+     *
+     * @param string $principalUri
+     * @param array $filters
+     * @param integer|null $limit
+     * @param integer|null $offset
+     * @return array
+     */
+    public function calendarSearch($principalUri, array $filters, $limit=null, $offset=null) {
+        $calendars = $this->getCalendarsForUser($principalUri);
+        $ownCalendars = [];
+        $sharedCalendars = [];
+
+        $uriMapper = [];
+
+        foreach ($calendars as $calendar) {
+            if ($calendar['{http://owncloud.org/ns}owner-principal'] === $principalUri) {
+                $ownCalendars[] = $calendar['id'];
+            } else {
+                $sharedCalendars[] = $calendar['id'];
+            }
+            $uriMapper[$calendar['id']] = $calendar['uri'];
+        }
+        if (count($ownCalendars) === 0 && count($sharedCalendars) === 0) {
+            return [];
+        }
+
+        $query = $this->db->getQueryBuilder();
+        // Calendar id expressions
+        $calendarExpressions = [];
+        foreach ($ownCalendars as $id) {
+            $calendarExpressions[] = $query->expr()->andX(
+                $query->expr()->eq('c.calendarid',
+                    $query->createNamedParameter($id)),
+                $query->expr()->eq('c.calendartype',
+                        $query->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)));
+        }
+        foreach ($sharedCalendars as $id) {
+            $calendarExpressions[] = $query->expr()->andX(
+                $query->expr()->eq('c.calendarid',
+                    $query->createNamedParameter($id)),
+                $query->expr()->eq('c.classification',
+                    $query->createNamedParameter(self::CLASSIFICATION_PUBLIC)),
+                $query->expr()->eq('c.calendartype',
+                    $query->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)));
+        }
+
+        if (count($calendarExpressions) === 1) {
+            $calExpr = $calendarExpressions[0];
+        } else {
+            $calExpr = call_user_func_array([$query->expr(), 'orX'], $calendarExpressions);
+        }
+
+        // Component expressions
+        $compExpressions = [];
+        foreach ($filters['comps'] as $comp) {
+            $compExpressions[] = $query->expr()
+                ->eq('c.componenttype', $query->createNamedParameter($comp));
+        }
+
+        if (count($compExpressions) === 1) {
+            $compExpr = $compExpressions[0];
+        } else {
+            $compExpr = call_user_func_array([$query->expr(), 'orX'], $compExpressions);
+        }
+
+        if (!isset($filters['props'])) {
+            $filters['props'] = [];
+        }
+        if (!isset($filters['params'])) {
+            $filters['params'] = [];
+        }
+
+        $propParamExpressions = [];
+        foreach ($filters['props'] as $prop) {
+            $propParamExpressions[] = $query->expr()->andX(
+                $query->expr()->eq('i.name', $query->createNamedParameter($prop)),
+                $query->expr()->isNull('i.parameter')
+            );
+        }
+        foreach ($filters['params'] as $param) {
+            $propParamExpressions[] = $query->expr()->andX(
+                $query->expr()->eq('i.name', $query->createNamedParameter($param['property'])),
+                $query->expr()->eq('i.parameter', $query->createNamedParameter($param['parameter']))
+            );
+        }
+
+        if (count($propParamExpressions) === 1) {
+            $propParamExpr = $propParamExpressions[0];
+        } else {
+            $propParamExpr = call_user_func_array([$query->expr(), 'orX'], $propParamExpressions);
+        }
+
+        $query->select(['c.calendarid', 'c.uri'])
+            ->from($this->dbObjectPropertiesTable, 'i')
+            ->join('i', 'calendarobjects', 'c', $query->expr()->eq('i.objectid', 'c.id'))
+            ->where($calExpr)
+            ->andWhere($compExpr)
+            ->andWhere($propParamExpr)
+            ->andWhere($query->expr()->iLike('i.value',
+                $query->createNamedParameter('%'.$this->db->escapeLikeParameter($filters['search-term']).'%')));
+
+        if ($offset) {
+            $query->setFirstResult($offset);
+        }
+        if ($limit) {
+            $query->setMaxResults($limit);
+        }
+
+        $stmt = $query->execute();
+
+        $result = [];
+        while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            $path = $uriMapper[$row['calendarid']] . '/' . $row['uri'];
+            if (!in_array($path, $result)) {
+                $result[] = $path;
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * used for Nextcloud's calendar API
+     *
+     * @param array $calendarInfo
+     * @param string $pattern
+     * @param array $searchProperties
+     * @param array $options
+     * @param integer|null $limit
+     * @param integer|null $offset
+     *
+     * @return array
+     */
+    public function search(array $calendarInfo, $pattern, array $searchProperties,
+                            array $options, $limit, $offset) {
+        $outerQuery = $this->db->getQueryBuilder();
+        $innerQuery = $this->db->getQueryBuilder();
+
+        $innerQuery->selectDistinct('op.objectid')
+            ->from($this->dbObjectPropertiesTable, 'op')
+            ->andWhere($innerQuery->expr()->eq('op.calendarid',
+                $outerQuery->createNamedParameter($calendarInfo['id'])))
+            ->andWhere($innerQuery->expr()->eq('op.calendartype',
+                $outerQuery->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)));
+
+        // only return public items for shared calendars for now
+        if ($calendarInfo['principaluri'] !== $calendarInfo['{http://owncloud.org/ns}owner-principal']) {
+            $innerQuery->andWhere($innerQuery->expr()->eq('c.classification',
+                $outerQuery->createNamedParameter(self::CLASSIFICATION_PUBLIC)));
+        }
+
+        $or = $innerQuery->expr()->orX();
+        foreach ($searchProperties as $searchProperty) {
+            $or->add($innerQuery->expr()->eq('op.name',
+                $outerQuery->createNamedParameter($searchProperty)));
+        }
+        $innerQuery->andWhere($or);
+
+        if ($pattern !== '') {
+            $innerQuery->andWhere($innerQuery->expr()->iLike('op.value',
+                $outerQuery->createNamedParameter('%' .
+                    $this->db->escapeLikeParameter($pattern) . '%')));
+        }
+
+        $outerQuery->select('c.id', 'c.calendardata', 'c.componenttype', 'c.uid', 'c.uri')
+            ->from('calendarobjects', 'c');
+
+        if (isset($options['timerange'])) {
+            if (isset($options['timerange']['start']) && $options['timerange']['start'] instanceof DateTime) {
+                $outerQuery->andWhere($outerQuery->expr()->gt('lastoccurence',
+                    $outerQuery->createNamedParameter($options['timerange']['start']->getTimeStamp())));
+            }
+            if (isset($options['timerange']['end']) && $options['timerange']['end'] instanceof DateTime) {
+                $outerQuery->andWhere($outerQuery->expr()->lt('firstoccurence',
+                    $outerQuery->createNamedParameter($options['timerange']['end']->getTimeStamp())));
+            }
+        }
+
+        if (isset($options['types'])) {
+            $or = $outerQuery->expr()->orX();
+            foreach ($options['types'] as $type) {
+                $or->add($outerQuery->expr()->eq('componenttype',
+                    $outerQuery->createNamedParameter($type)));
+            }
+            $outerQuery->andWhere($or);
+        }
+
+        $outerQuery->andWhere($outerQuery->expr()->in('c.id',
+            $outerQuery->createFunction($innerQuery->getSQL())));
+
+        if ($offset) {
+            $outerQuery->setFirstResult($offset);
+        }
+        if ($limit) {
+            $outerQuery->setMaxResults($limit);
+        }
+
+        $result = $outerQuery->execute();
+        $calendarObjects = $result->fetchAll();
+
+        return array_map(function ($o) {
+            $calendarData = Reader::read($o['calendardata']);
+            $comps = $calendarData->getComponents();
+            $objects = [];
+            $timezones = [];
+            foreach ($comps as $comp) {
+                if ($comp instanceof VTimeZone) {
+                    $timezones[] = $comp;
+                } else {
+                    $objects[] = $comp;
+                }
+            }
+
+            return [
+                'id' => $o['id'],
+                'type' => $o['componenttype'],
+                'uid' => $o['uid'],
+                'uri' => $o['uri'],
+                'objects' => array_map(function ($c) {
+                    return $this->transformSearchData($c);
+                }, $objects),
+                'timezones' => array_map(function ($c) {
+                    return $this->transformSearchData($c);
+                }, $timezones),
+            ];
+        }, $calendarObjects);
+    }
+
+    /**
+     * @param Component $comp
+     * @return array
+     */
+    private function transformSearchData(Component $comp) {
+        $data = [];
+        /** @var Component[] $subComponents */
+        $subComponents = $comp->getComponents();
+        /** @var Property[] $properties */
+        $properties = array_filter($comp->children(), function ($c) {
+            return $c instanceof Property;
+        });
+        $validationRules = $comp->getValidationRules();
+
+        foreach ($subComponents as $subComponent) {
+            $name = $subComponent->name;
+            if (!isset($data[$name])) {
+                $data[$name] = [];
+            }
+            $data[$name][] = $this->transformSearchData($subComponent);
+        }
+
+        foreach ($properties as $property) {
+            $name = $property->name;
+            if (!isset($validationRules[$name])) {
+                $validationRules[$name] = '*';
+            }
+
+            $rule = $validationRules[$property->name];
+            if ($rule === '+' || $rule === '*') { // multiple
+                if (!isset($data[$name])) {
+                    $data[$name] = [];
+                }
+
+                $data[$name][] = $this->transformSearchProperty($property);
+            } else { // once
+                $data[$name] = $this->transformSearchProperty($property);
+            }
+        }
+
+        return $data;
+    }
+
+    /**
+     * @param Property $prop
+     * @return array
+     */
+    private function transformSearchProperty(Property $prop) {
+        // No need to check Date, as it extends DateTime
+        if ($prop instanceof Property\ICalendar\DateTime) {
+            $value = $prop->getDateTime();
+        } else {
+            $value = $prop->getValue();
+        }
+
+        return [
+            $value,
+            $prop->parameters()
+        ];
+    }
+
+    /**
+     * @param string $principalUri
+     * @param string $pattern
+     * @param array $componentTypes
+     * @param array $searchProperties
+     * @param array $searchParameters
+     * @param array $options
+     * @return array
+     */
+    public function searchPrincipalUri(string $principalUri,
+                                        string $pattern,
+                                        array $componentTypes,
+                                        array $searchProperties,
+                                        array $searchParameters,
+                                        array $options = []): array {
+        $escapePattern = !\array_key_exists('escape_like_param', $options) || $options['escape_like_param'] !== false;
+
+        $calendarObjectIdQuery = $this->db->getQueryBuilder();
+        $calendarOr = $calendarObjectIdQuery->expr()->orX();
+        $searchOr = $calendarObjectIdQuery->expr()->orX();
+
+        // Fetch calendars and subscription
+        $calendars = $this->getCalendarsForUser($principalUri);
+        $subscriptions = $this->getSubscriptionsForUser($principalUri);
+        foreach ($calendars as $calendar) {
+            $calendarAnd = $calendarObjectIdQuery->expr()->andX();
+            $calendarAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendarid', $calendarObjectIdQuery->createNamedParameter((int)$calendar['id'])));
+            $calendarAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendartype', $calendarObjectIdQuery->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)));
+
+            // If it's shared, limit search to public events
+            if ($calendar['principaluri'] !== $calendar['{http://owncloud.org/ns}owner-principal']) {
+                $calendarAnd->add($calendarObjectIdQuery->expr()->eq('co.classification', $calendarObjectIdQuery->createNamedParameter(self::CLASSIFICATION_PUBLIC)));
+            }
+
+            $calendarOr->add($calendarAnd);
+        }
+        foreach ($subscriptions as $subscription) {
+            $subscriptionAnd = $calendarObjectIdQuery->expr()->andX();
+            $subscriptionAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendarid', $calendarObjectIdQuery->createNamedParameter((int)$subscription['id'])));
+            $subscriptionAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendartype', $calendarObjectIdQuery->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)));
+
+            // If it's shared, limit search to public events
+            if ($subscription['principaluri'] !== $subscription['{http://owncloud.org/ns}owner-principal']) {
+                $subscriptionAnd->add($calendarObjectIdQuery->expr()->eq('co.classification', $calendarObjectIdQuery->createNamedParameter(self::CLASSIFICATION_PUBLIC)));
+            }
+
+            $calendarOr->add($subscriptionAnd);
+        }
+
+        foreach ($searchProperties as $property) {
+            $propertyAnd = $calendarObjectIdQuery->expr()->andX();
+            $propertyAnd->add($calendarObjectIdQuery->expr()->eq('cob.name', $calendarObjectIdQuery->createNamedParameter($property, IQueryBuilder::PARAM_STR)));
+            $propertyAnd->add($calendarObjectIdQuery->expr()->isNull('cob.parameter'));
+
+            $searchOr->add($propertyAnd);
+        }
+        foreach ($searchParameters as $property => $parameter) {
+            $parameterAnd = $calendarObjectIdQuery->expr()->andX();
+            $parameterAnd->add($calendarObjectIdQuery->expr()->eq('cob.name', $calendarObjectIdQuery->createNamedParameter($property, IQueryBuilder::PARAM_STR)));
+            $parameterAnd->add($calendarObjectIdQuery->expr()->eq('cob.parameter', $calendarObjectIdQuery->createNamedParameter($parameter, IQueryBuilder::PARAM_STR)));
+
+            $searchOr->add($parameterAnd);
+        }
+
+        if ($calendarOr->count() === 0) {
+            return [];
+        }
+        if ($searchOr->count() === 0) {
+            return [];
+        }
+
+        $calendarObjectIdQuery->selectDistinct('cob.objectid')
+            ->from($this->dbObjectPropertiesTable, 'cob')
+            ->leftJoin('cob', 'calendarobjects', 'co', $calendarObjectIdQuery->expr()->eq('co.id', 'cob.objectid'))
+            ->andWhere($calendarObjectIdQuery->expr()->in('co.componenttype', $calendarObjectIdQuery->createNamedParameter($componentTypes, IQueryBuilder::PARAM_STR_ARRAY)))
+            ->andWhere($calendarOr)
+            ->andWhere($searchOr);
+
+        if ('' !== $pattern) {
+            if (!$escapePattern) {
+                $calendarObjectIdQuery->andWhere($calendarObjectIdQuery->expr()->ilike('cob.value', $calendarObjectIdQuery->createNamedParameter($pattern)));
+            } else {
+                $calendarObjectIdQuery->andWhere($calendarObjectIdQuery->expr()->ilike('cob.value', $calendarObjectIdQuery->createNamedParameter('%' . $this->db->escapeLikeParameter($pattern) . '%')));
+            }
+        }
+
+        if (isset($options['limit'])) {
+            $calendarObjectIdQuery->setMaxResults($options['limit']);
+        }
+        if (isset($options['offset'])) {
+            $calendarObjectIdQuery->setFirstResult($options['offset']);
+        }
+
+        $result = $calendarObjectIdQuery->execute();
+        $matches = $result->fetchAll();
+        $result->closeCursor();
+        $matches = array_map(static function (array $match):int {
+            return (int) $match['objectid'];
+        }, $matches);
+
+        $query = $this->db->getQueryBuilder();
+        $query->select('calendardata', 'uri', 'calendarid', 'calendartype')
+            ->from('calendarobjects')
+            ->where($query->expr()->in('id', $query->createNamedParameter($matches, IQueryBuilder::PARAM_INT_ARRAY)));
+
+        $result = $query->execute();
+        $calendarObjects = $result->fetchAll();
+        $result->closeCursor();
+
+        return array_map(function (array $array): array {
+            $array['calendarid'] = (int)$array['calendarid'];
+            $array['calendartype'] = (int)$array['calendartype'];
+            $array['calendardata'] = $this->readBlob($array['calendardata']);
+
+            return $array;
+        }, $calendarObjects);
+    }
+
+    /**
+     * Searches through all of a users calendars and calendar objects to find
+     * an object with a specific UID.
+     *
+     * This method should return the path to this object, relative to the
+     * calendar home, so this path usually only contains two parts:
+     *
+     * calendarpath/objectpath.ics
+     *
+     * If the uid is not found, return null.
+     *
+     * This method should only consider * objects that the principal owns, so
+     * any calendars owned by other principals that also appear in this
+     * collection should be ignored.
+     *
+     * @param string $principalUri
+     * @param string $uid
+     * @return string|null
+     */
+    public function getCalendarObjectByUID($principalUri, $uid) {
+        $query = $this->db->getQueryBuilder();
+        $query->selectAlias('c.uri', 'calendaruri')->selectAlias('co.uri', 'objecturi')
+            ->from('calendarobjects', 'co')
+            ->leftJoin('co', 'calendars', 'c', $query->expr()->eq('co.calendarid', 'c.id'))
+            ->where($query->expr()->eq('c.principaluri', $query->createNamedParameter($principalUri)))
+            ->andWhere($query->expr()->eq('co.uid', $query->createNamedParameter($uid)));
+
+        $stmt = $query->execute();
+
+        if ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            return $row['calendaruri'] . '/' . $row['objecturi'];
+        }
+
+        return null;
+    }
+
+    /**
+     * The getChanges method returns all the changes that have happened, since
+     * the specified syncToken in the specified calendar.
+     *
+     * This function should return an array, such as the following:
+     *
+     * [
+     *   'syncToken' => 'The current synctoken',
+     *   'added'   => [
+     *      'new.txt',
+     *   ],
+     *   'modified'   => [
+     *      'modified.txt',
+     *   ],
+     *   'deleted' => [
+     *      'foo.php.bak',
+     *      'old.txt'
+     *   ]
+     * );
+     *
+     * The returned syncToken property should reflect the *current* syncToken
+     * of the calendar, as reported in the {http://sabredav.org/ns}sync-token
+     * property This is * needed here too, to ensure the operation is atomic.
+     *
+     * If the $syncToken argument is specified as null, this is an initial
+     * sync, and all members should be reported.
+     *
+     * The modified property is an array of nodenames that have changed since
+     * the last token.
+     *
+     * The deleted property is an array with nodenames, that have been deleted
+     * from collection.
+     *
+     * The $syncLevel argument is basically the 'depth' of the report. If it's
+     * 1, you only have to report changes that happened only directly in
+     * immediate descendants. If it's 2, it should also include changes from
+     * the nodes below the child collections. (grandchildren)
+     *
+     * The $limit argument allows a client to specify how many results should
+     * be returned at most. If the limit is not specified, it should be treated
+     * as infinite.
+     *
+     * If the limit (infinite or not) is higher than you're willing to return,
+     * you should throw a Sabre\DAV\Exception\TooMuchMatches() exception.
+     *
+     * If the syncToken is expired (due to data cleanup) or unknown, you must
+     * return null.
+     *
+     * The limit is 'suggestive'. You are free to ignore it.
+     *
+     * @param string $calendarId
+     * @param string $syncToken
+     * @param int $syncLevel
+     * @param int $limit
+     * @param int $calendarType
+     * @return array
+     */
+    public function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+        // Current synctoken
+        $stmt = $this->db->prepare('SELECT `synctoken` FROM `*PREFIX*calendars` WHERE `id` = ?');
+        $stmt->execute([ $calendarId ]);
+        $currentToken = $stmt->fetchColumn(0);
+
+        if (is_null($currentToken)) {
+            return null;
+        }
+
+        $result = [
+            'syncToken' => $currentToken,
+            'added'     => [],
+            'modified'  => [],
+            'deleted'   => [],
+        ];
+
+        if ($syncToken) {
+            $query = "SELECT `uri`, `operation` FROM `*PREFIX*calendarchanges` WHERE `synctoken` >= ? AND `synctoken` < ? AND `calendarid` = ? AND `calendartype` = ? ORDER BY `synctoken`";
+            if ($limit>0) {
+                $query.= " LIMIT " . (int)$limit;
+            }
+
+            // Fetching all changes
+            $stmt = $this->db->prepare($query);
+            $stmt->execute([$syncToken, $currentToken, $calendarId, $calendarType]);
+
+            $changes = [];
+
+            // This loop ensures that any duplicates are overwritten, only the
+            // last change on a node is relevant.
+            while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+                $changes[$row['uri']] = $row['operation'];
+            }
+
+            foreach ($changes as $uri => $operation) {
+                switch ($operation) {
+                    case 1:
+                        $result['added'][] = $uri;
+                        break;
+                    case 2:
+                        $result['modified'][] = $uri;
+                        break;
+                    case 3:
+                        $result['deleted'][] = $uri;
+                        break;
+                }
+            }
+        } else {
+            // No synctoken supplied, this is the initial sync.
+            $query = "SELECT `uri` FROM `*PREFIX*calendarobjects` WHERE `calendarid` = ? AND `calendartype` = ?";
+            $stmt = $this->db->prepare($query);
+            $stmt->execute([$calendarId, $calendarType]);
+
+            $result['added'] = $stmt->fetchAll(\PDO::FETCH_COLUMN);
+        }
+        return $result;
+    }
+
+    /**
+     * Returns a list of subscriptions for a principal.
+     *
+     * Every subscription is an array with the following keys:
+     *  * id, a unique id that will be used by other functions to modify the
+     *    subscription. This can be the same as the uri or a database key.
+     *  * uri. This is just the 'base uri' or 'filename' of the subscription.
+     *  * principaluri. The owner of the subscription. Almost always the same as
+     *    principalUri passed to this method.
+     *
+     * Furthermore, all the subscription info must be returned too:
+     *
+     * 1. {DAV:}displayname
+     * 2. {http://apple.com/ns/ical/}refreshrate
+     * 3. {http://calendarserver.org/ns/}subscribed-strip-todos (omit if todos
+     *    should not be stripped).
+     * 4. {http://calendarserver.org/ns/}subscribed-strip-alarms (omit if alarms
+     *    should not be stripped).
+     * 5. {http://calendarserver.org/ns/}subscribed-strip-attachments (omit if
+     *    attachments should not be stripped).
+     * 6. {http://calendarserver.org/ns/}source (Must be a
+     *     Sabre\DAV\Property\Href).
+     * 7. {http://apple.com/ns/ical/}calendar-color
+     * 8. {http://apple.com/ns/ical/}calendar-order
+     * 9. {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
+     *    (should just be an instance of
+     *    Sabre\CalDAV\Property\SupportedCalendarComponentSet, with a bunch of
+     *    default components).
+     *
+     * @param string $principalUri
+     * @return array
+     */
+    public function getSubscriptionsForUser($principalUri) {
+        $fields = array_values($this->subscriptionPropertyMap);
+        $fields[] = 'id';
+        $fields[] = 'uri';
+        $fields[] = 'source';
+        $fields[] = 'principaluri';
+        $fields[] = 'lastmodified';
+        $fields[] = 'synctoken';
+
+        $query = $this->db->getQueryBuilder();
+        $query->select($fields)
+            ->from('calendarsubscriptions')
+            ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+            ->orderBy('calendarorder', 'asc');
+        $stmt =$query->execute();
+
+        $subscriptions = [];
+        while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            $subscription = [
+                'id'           => $row['id'],
+                'uri'          => $row['uri'],
+                'principaluri' => $row['principaluri'],
+                'source'       => $row['source'],
+                'lastmodified' => $row['lastmodified'],
+
+                '{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
+                '{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+            ];
+
+            foreach ($this->subscriptionPropertyMap as $xmlName=>$dbName) {
+                if (!is_null($row[$dbName])) {
+                    $subscription[$xmlName] = $row[$dbName];
+                }
+            }
+
+            $subscriptions[] = $subscription;
+        }
+
+        return $subscriptions;
+    }
+
+    /**
+     * Creates a new subscription for a principal.
+     *
+     * If the creation was a success, an id must be returned that can be used to reference
+     * this subscription in other methods, such as updateSubscription.
+     *
+     * @param string $principalUri
+     * @param string $uri
+     * @param array $properties
+     * @return mixed
+     */
+    public function createSubscription($principalUri, $uri, array $properties) {
+        if (!isset($properties['{http://calendarserver.org/ns/}source'])) {
+            throw new Forbidden('The {http://calendarserver.org/ns/}source property is required when creating subscriptions');
+        }
+
+        $values = [
+            'principaluri' => $principalUri,
+            'uri'          => $uri,
+            'source'       => $properties['{http://calendarserver.org/ns/}source']->getHref(),
+            'lastmodified' => time(),
+        ];
+
+        $propertiesBoolean = ['striptodos', 'stripalarms', 'stripattachments'];
+
+        foreach ($this->subscriptionPropertyMap as $xmlName=>$dbName) {
+            if (array_key_exists($xmlName, $properties)) {
+                $values[$dbName] = $properties[$xmlName];
+                if (in_array($dbName, $propertiesBoolean)) {
+                    $values[$dbName] = true;
+                }
+            }
+        }
+
+        $valuesToInsert = [];
+
+        $query = $this->db->getQueryBuilder();
+
+        foreach (array_keys($values) as $name) {
+            $valuesToInsert[$name] = $query->createNamedParameter($values[$name]);
+        }
+
+        $query->insert('calendarsubscriptions')
+            ->values($valuesToInsert)
+            ->execute();
+
+        $subscriptionId = $this->db->lastInsertId('*PREFIX*calendarsubscriptions');
+
+        $subscriptionRow = $this->getSubscriptionById($subscriptionId);
+        $this->dispatcher->dispatchTyped(new SubscriptionCreatedEvent((int)$subscriptionId, $subscriptionRow));
+        $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createSubscription', new GenericEvent(
+            '\OCA\DAV\CalDAV\CalDavBackend::createSubscription',
+            [
+                'subscriptionId' => $subscriptionId,
+                'subscriptionData' => $subscriptionRow,
+            ]));
+
+        return $subscriptionId;
+    }
+
+    /**
+     * Updates a subscription
+     *
+     * The list of mutations is stored in a Sabre\DAV\PropPatch object.
+     * To do the actual updates, you must tell this object which properties
+     * you're going to process with the handle() method.
+     *
+     * Calling the handle method is like telling the PropPatch object "I
+     * promise I can handle updating this property".
+     *
+     * Read the PropPatch documentation for more info and examples.
+     *
+     * @param mixed $subscriptionId
+     * @param PropPatch $propPatch
+     * @return void
+     */
+    public function updateSubscription($subscriptionId, PropPatch $propPatch) {
+        $supportedProperties = array_keys($this->subscriptionPropertyMap);
+        $supportedProperties[] = '{http://calendarserver.org/ns/}source';
+
+        $propPatch->handle($supportedProperties, function ($mutations) use ($subscriptionId) {
+            $newValues = [];
+
+            foreach ($mutations as $propertyName=>$propertyValue) {
+                if ($propertyName === '{http://calendarserver.org/ns/}source') {
+                    $newValues['source'] = $propertyValue->getHref();
+                } else {
+                    $fieldName = $this->subscriptionPropertyMap[$propertyName];
+                    $newValues[$fieldName] = $propertyValue;
+                }
+            }
+
+            $query = $this->db->getQueryBuilder();
+            $query->update('calendarsubscriptions')
+                ->set('lastmodified', $query->createNamedParameter(time()));
+            foreach ($newValues as $fieldName=>$value) {
+                $query->set($fieldName, $query->createNamedParameter($value));
+            }
+            $query->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
+                ->execute();
+
+            $subscriptionRow = $this->getSubscriptionById($subscriptionId);
+            $this->dispatcher->dispatchTyped(new SubscriptionUpdatedEvent((int)$subscriptionId, $subscriptionRow, [], $mutations));
+            $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateSubscription', new GenericEvent(
+                '\OCA\DAV\CalDAV\CalDavBackend::updateSubscription',
+                [
+                    'subscriptionId' => $subscriptionId,
+                    'subscriptionData' => $subscriptionRow,
+                    'propertyMutations' => $mutations,
+                ]));
+
+            return true;
+        });
+    }
+
+    /**
+     * Deletes a subscription.
+     *
+     * @param mixed $subscriptionId
+     * @return void
+     */
+    public function deleteSubscription($subscriptionId) {
+        $subscriptionRow = $this->getSubscriptionById($subscriptionId);
+
+        $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteSubscription', new GenericEvent(
+            '\OCA\DAV\CalDAV\CalDavBackend::deleteSubscription',
+            [
+                'subscriptionId' => $subscriptionId,
+                'subscriptionData' => $this->getSubscriptionById($subscriptionId),
+            ]));
+
+        $query = $this->db->getQueryBuilder();
+        $query->delete('calendarsubscriptions')
+            ->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
+            ->execute();
+
+        $query = $this->db->getQueryBuilder();
+        $query->delete('calendarobjects')
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
+            ->execute();
+
+        $query->delete('calendarchanges')
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
+            ->execute();
+
+        $query->delete($this->dbObjectPropertiesTable)
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
+            ->execute();
+
+        if ($subscriptionRow) {
+            $this->dispatcher->dispatchTyped(new SubscriptionDeletedEvent((int)$subscriptionId, $subscriptionRow, []));
+        }
+    }
+
+    /**
+     * Returns a single scheduling object for the inbox collection.
+     *
+     * The returned array should contain the following elements:
+     *   * uri - A unique basename for the object. This will be used to
+     *           construct a full uri.
+     *   * calendardata - The iCalendar object
+     *   * lastmodified - The last modification date. Can be an int for a unix
+     *                    timestamp, or a PHP DateTime object.
+     *   * etag - A unique token that must change if the object changed.
+     *   * size - The size of the object, in bytes.
+     *
+     * @param string $principalUri
+     * @param string $objectUri
+     * @return array
+     */
+    public function getSchedulingObject($principalUri, $objectUri) {
+        $query = $this->db->getQueryBuilder();
+        $stmt = $query->select(['uri', 'calendardata', 'lastmodified', 'etag', 'size'])
+            ->from('schedulingobjects')
+            ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+            ->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
+            ->execute();
+
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+
+        if (!$row) {
+            return null;
+        }
+
+        return [
+            'uri'          => $row['uri'],
+            'calendardata' => $row['calendardata'],
+            'lastmodified' => $row['lastmodified'],
+            'etag'         => '"' . $row['etag'] . '"',
+            'size'         => (int)$row['size'],
+        ];
+    }
+
+    /**
+     * Returns all scheduling objects for the inbox collection.
+     *
+     * These objects should be returned as an array. Every item in the array
+     * should follow the same structure as returned from getSchedulingObject.
+     *
+     * The main difference is that 'calendardata' is optional.
+     *
+     * @param string $principalUri
+     * @return array
+     */
+    public function getSchedulingObjects($principalUri) {
+        $query = $this->db->getQueryBuilder();
+        $stmt = $query->select(['uri', 'calendardata', 'lastmodified', 'etag', 'size'])
+                ->from('schedulingobjects')
+                ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+                ->execute();
+
+        $result = [];
+        foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
+            $result[] = [
+                'calendardata' => $row['calendardata'],
+                'uri'          => $row['uri'],
+                'lastmodified' => $row['lastmodified'],
+                'etag'         => '"' . $row['etag'] . '"',
+                'size'         => (int)$row['size'],
+            ];
+        }
+
+        return $result;
+    }
+
+    /**
+     * Deletes a scheduling object from the inbox collection.
+     *
+     * @param string $principalUri
+     * @param string $objectUri
+     * @return void
+     */
+    public function deleteSchedulingObject($principalUri, $objectUri) {
+        $query = $this->db->getQueryBuilder();
+        $query->delete('schedulingobjects')
+                ->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
+                ->andWhere($query->expr()->eq('uri', $query->createNamedParameter($objectUri)))
+                ->execute();
+    }
+
+    /**
+     * Creates a new scheduling object. This should land in a users' inbox.
+     *
+     * @param string $principalUri
+     * @param string $objectUri
+     * @param string $objectData
+     * @return void
+     */
+    public function createSchedulingObject($principalUri, $objectUri, $objectData) {
+        $query = $this->db->getQueryBuilder();
+        $query->insert('schedulingobjects')
+            ->values([
+                'principaluri' => $query->createNamedParameter($principalUri),
+                'calendardata' => $query->createNamedParameter($objectData, IQueryBuilder::PARAM_LOB),
+                'uri' => $query->createNamedParameter($objectUri),
+                'lastmodified' => $query->createNamedParameter(time()),
+                'etag' => $query->createNamedParameter(md5($objectData)),
+                'size' => $query->createNamedParameter(strlen($objectData))
+            ])
+            ->execute();
+    }
+
+    /**
+     * Adds a change record to the calendarchanges table.
+     *
+     * @param mixed $calendarId
+     * @param string $objectUri
+     * @param int $operation 1 = add, 2 = modify, 3 = delete.
+     * @param int $calendarType
+     * @return void
+     */
+    protected function addChange($calendarId, $objectUri, $operation, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+        $table = $calendarType === self::CALENDAR_TYPE_CALENDAR ? 'calendars': 'calendarsubscriptions';
+
+        $query = $this->db->getQueryBuilder();
+        $query->select('synctoken')
+            ->from($table)
+            ->where($query->expr()->eq('id', $query->createNamedParameter($calendarId)));
+        $syncToken = (int)$query->execute()->fetchColumn();
+
+        $query = $this->db->getQueryBuilder();
+        $query->insert('calendarchanges')
+            ->values([
+                'uri' => $query->createNamedParameter($objectUri),
+                'synctoken' => $query->createNamedParameter($syncToken),
+                'calendarid' => $query->createNamedParameter($calendarId),
+                'operation' => $query->createNamedParameter($operation),
+                'calendartype' => $query->createNamedParameter($calendarType),
+            ])
+            ->execute();
+
+        $stmt = $this->db->prepare("UPDATE `*PREFIX*$table` SET `synctoken` = `synctoken` + 1 WHERE `id` = ?");
+        $stmt->execute([
+            $calendarId
+        ]);
+    }
+
+    /**
+     * Parses some information from calendar objects, used for optimized
+     * calendar-queries.
+     *
+     * Returns an array with the following keys:
+     *   * etag - An md5 checksum of the object without the quotes.
+     *   * size - Size of the object in bytes
+     *   * componentType - VEVENT, VTODO or VJOURNAL
+     *   * firstOccurence
+     *   * lastOccurence
+     *   * uid - value of the UID property
+     *
+     * @param string $calendarData
+     * @return array
+     */
+    public function getDenormalizedData($calendarData) {
+        $vObject = Reader::read($calendarData);
+        $componentType = null;
+        $component = null;
+        $firstOccurrence = null;
+        $lastOccurrence = null;
+        $uid = null;
+        $classification = self::CLASSIFICATION_PUBLIC;
+        foreach ($vObject->getComponents() as $component) {
+            if ($component->name!=='VTIMEZONE') {
+                $componentType = $component->name;
+                $uid = (string)$component->UID;
+                break;
+            }
+        }
+        if (!$componentType) {
+            throw new \Sabre\DAV\Exception\BadRequest('Calendar objects must have a VJOURNAL, VEVENT or VTODO component');
+        }
+        if ($componentType === 'VEVENT' && $component->DTSTART) {
+            $firstOccurrence = $component->DTSTART->getDateTime()->getTimeStamp();
+            // Finding the last occurrence is a bit harder
+            if (!isset($component->RRULE)) {
+                if (isset($component->DTEND)) {
+                    $lastOccurrence = $component->DTEND->getDateTime()->getTimeStamp();
+                } elseif (isset($component->DURATION)) {
+                    $endDate = clone $component->DTSTART->getDateTime();
+                    $endDate->add(DateTimeParser::parse($component->DURATION->getValue()));
+                    $lastOccurrence = $endDate->getTimeStamp();
+                } elseif (!$component->DTSTART->hasTime()) {
+                    $endDate = clone $component->DTSTART->getDateTime();
+                    $endDate->modify('+1 day');
+                    $lastOccurrence = $endDate->getTimeStamp();
+                } else {
+                    $lastOccurrence = $firstOccurrence;
+                }
+            } else {
+                $it = new EventIterator($vObject, (string)$component->UID);
+                $maxDate = new DateTime(self::MAX_DATE);
+                if ($it->isInfinite()) {
+                    $lastOccurrence = $maxDate->getTimestamp();
+                } else {
+                    $end = $it->getDtEnd();
+                    while ($it->valid() && $end < $maxDate) {
+                        $end = $it->getDtEnd();
+                        $it->next();
+                    }
+                    $lastOccurrence = $end->getTimestamp();
+                }
+            }
+        }
+
+        if ($component->CLASS) {
+            $classification = CalDavBackend::CLASSIFICATION_PRIVATE;
+            switch ($component->CLASS->getValue()) {
+                case 'PUBLIC':
+                    $classification = CalDavBackend::CLASSIFICATION_PUBLIC;
+                    break;
+                case 'CONFIDENTIAL':
+                    $classification = CalDavBackend::CLASSIFICATION_CONFIDENTIAL;
+                    break;
+            }
+        }
+        return [
+            'etag' => md5($calendarData),
+            'size' => strlen($calendarData),
+            'componentType' => $componentType,
+            'firstOccurence' => is_null($firstOccurrence) ? null : max(0, $firstOccurrence),
+            'lastOccurence'  => $lastOccurrence,
+            'uid' => $uid,
+            'classification' => $classification
+        ];
+    }
+
+    /**
+     * @param $cardData
+     * @return bool|string
+     */
+    private function readBlob($cardData) {
+        if (is_resource($cardData)) {
+            return stream_get_contents($cardData);
+        }
+
+        return $cardData;
+    }
+
+    /**
+     * @param IShareable $shareable
+     * @param array $add
+     * @param array $remove
+     */
+    public function updateShares($shareable, $add, $remove) {
+        $calendarId = $shareable->getResourceId();
+        $calendarRow = $this->getCalendarById($calendarId);
+        $oldShares = $this->getShares($calendarId);
+
+        $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateShares', new GenericEvent(
+            '\OCA\DAV\CalDAV\CalDavBackend::updateShares',
+            [
+                'calendarId' => $calendarId,
+                'calendarData' => $calendarRow,
+                'shares' => $oldShares,
+                'add' => $add,
+                'remove' => $remove,
+            ]));
+        $this->calendarSharingBackend->updateShares($shareable, $add, $remove);
+
+        $this->dispatcher->dispatchTyped(new CalendarShareUpdatedEvent((int)$calendarId, $calendarRow, $oldShares, $add, $remove));
+    }
+
+    /**
+     * @param int $resourceId
+     * @param int $calendarType
+     * @return array
+     */
+    public function getShares($resourceId, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+        return $this->calendarSharingBackend->getShares($resourceId);
+    }
+
+    /**
+     * @param boolean $value
+     * @param \OCA\DAV\CalDAV\Calendar $calendar
+     * @return string|null
+     */
+    public function setPublishStatus($value, $calendar) {
+        $calendarId = $calendar->getResourceId();
+        $calendarData = $this->getCalendarById($calendarId);
+        $this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::publishCalendar', new GenericEvent(
+            '\OCA\DAV\CalDAV\CalDavBackend::updateShares',
+            [
+                'calendarId' => $calendarId,
+                'calendarData' => $calendarData,
+                'public' => $value,
+            ]));
+
+        $query = $this->db->getQueryBuilder();
+        if ($value) {
+            $publicUri = $this->random->generate(16, ISecureRandom::CHAR_HUMAN_READABLE);
+            $query->insert('dav_shares')
+                ->values([
+                    'principaluri' => $query->createNamedParameter($calendar->getPrincipalURI()),
+                    'type' => $query->createNamedParameter('calendar'),
+                    'access' => $query->createNamedParameter(self::ACCESS_PUBLIC),
+                    'resourceid' => $query->createNamedParameter($calendar->getResourceId()),
+                    'publicuri' => $query->createNamedParameter($publicUri)
+                ]);
+            $query->execute();
+
+            $this->dispatcher->dispatchTyped(new CalendarPublishedEvent((int)$calendarId, $calendarData, $publicUri));
+            return $publicUri;
+        }
+        $query->delete('dav_shares')
+            ->where($query->expr()->eq('resourceid', $query->createNamedParameter($calendar->getResourceId())))
+            ->andWhere($query->expr()->eq('access', $query->createNamedParameter(self::ACCESS_PUBLIC)));
+        $query->execute();
+
+        $this->dispatcher->dispatchTyped(new CalendarUnpublishedEvent((int)$calendarId, $calendarData));
+        return null;
+    }
+
+    /**
+     * @param \OCA\DAV\CalDAV\Calendar $calendar
+     * @return mixed
+     */
+    public function getPublishStatus($calendar) {
+        $query = $this->db->getQueryBuilder();
+        $result = $query->select('publicuri')
+            ->from('dav_shares')
+            ->where($query->expr()->eq('resourceid', $query->createNamedParameter($calendar->getResourceId())))
+            ->andWhere($query->expr()->eq('access', $query->createNamedParameter(self::ACCESS_PUBLIC)))
+            ->execute();
+
+        $row = $result->fetch();
+        $result->closeCursor();
+        return $row ? reset($row) : false;
+    }
+
+    /**
+     * @param int $resourceId
+     * @param array $acl
+     * @return array
+     */
+    public function applyShareAcl($resourceId, $acl) {
+        return $this->calendarSharingBackend->applyShareAcl($resourceId, $acl);
+    }
+
+
+
+    /**
+     * update properties table
+     *
+     * @param int $calendarId
+     * @param string $objectUri
+     * @param string $calendarData
+     * @param int $calendarType
+     */
+    public function updateProperties($calendarId, $objectUri, $calendarData, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+        $objectId = $this->getCalendarObjectId($calendarId, $objectUri, $calendarType);
+
+        try {
+            $vCalendar = $this->readCalendarData($calendarData);
+        } catch (\Exception $ex) {
+            return;
+        }
+
+        $this->purgeProperties($calendarId, $objectId);
+
+        $query = $this->db->getQueryBuilder();
+        $query->insert($this->dbObjectPropertiesTable)
+            ->values(
+                [
+                    'calendarid' => $query->createNamedParameter($calendarId),
+                    'calendartype' => $query->createNamedParameter($calendarType),
+                    'objectid' => $query->createNamedParameter($objectId),
+                    'name' => $query->createParameter('name'),
+                    'parameter' => $query->createParameter('parameter'),
+                    'value' => $query->createParameter('value'),
+                ]
+            );
+
+        $indexComponents = ['VEVENT', 'VJOURNAL', 'VTODO'];
+        foreach ($vCalendar->getComponents() as $component) {
+            if (!in_array($component->name, $indexComponents)) {
+                continue;
+            }
+
+            foreach ($component->children() as $property) {
+                if (in_array($property->name, self::$indexProperties)) {
+                    $value = $property->getValue();
+                    // is this a shitty db?
+                    if (!$this->db->supports4ByteText()) {
+                        $value = preg_replace('/[\x{10000}-\x{10FFFF}]/u', "\xEF\xBF\xBD", $value);
+                    }
+                    $value = mb_substr($value, 0, 254);
+
+                    $query->setParameter('name', $property->name);
+                    $query->setParameter('parameter', null);
+                    $query->setParameter('value', $value);
+                    $query->execute();
+                }
+
+                if (array_key_exists($property->name, self::$indexParameters)) {
+                    $parameters = $property->parameters();
+                    $indexedParametersForProperty = self::$indexParameters[$property->name];
+
+                    foreach ($parameters as $key => $value) {
+                        if (in_array($key, $indexedParametersForProperty)) {
+                            // is this a shitty db?
+                            if ($this->db->supports4ByteText()) {
+                                $value = preg_replace('/[\x{10000}-\x{10FFFF}]/u', "\xEF\xBF\xBD", $value);
+                            }
+
+                            $query->setParameter('name', $property->name);
+                            $query->setParameter('parameter', mb_substr($key, 0, 254));
+                            $query->setParameter('value', mb_substr($value, 0, 254));
+                            $query->execute();
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * deletes all birthday calendars
+     */
+    public function deleteAllBirthdayCalendars() {
+        $query = $this->db->getQueryBuilder();
+        $result = $query->select(['id'])->from('calendars')
+            ->where($query->expr()->eq('uri', $query->createNamedParameter(BirthdayService::BIRTHDAY_CALENDAR_URI)))
+            ->execute();
+
+        $ids = $result->fetchAll();
+        foreach ($ids as $id) {
+            $this->deleteCalendar($id['id']);
+        }
+    }
+
+    /**
+     * @param $subscriptionId
+     */
+    public function purgeAllCachedEventsForSubscription($subscriptionId) {
+        $query = $this->db->getQueryBuilder();
+        $query->select('uri')
+            ->from('calendarobjects')
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)));
+        $stmt = $query->execute();
+
+        $uris = [];
+        foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
+            $uris[] = $row['uri'];
+        }
+        $stmt->closeCursor();
+
+        $query = $this->db->getQueryBuilder();
+        $query->delete('calendarobjects')
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
+            ->execute();
+
+        $query->delete('calendarchanges')
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
+            ->execute();
+
+        $query->delete($this->dbObjectPropertiesTable)
+            ->where($query->expr()->eq('calendarid', $query->createNamedParameter($subscriptionId)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)))
+            ->execute();
+
+        foreach ($uris as $uri) {
+            $this->addChange($subscriptionId, $uri, 3, self::CALENDAR_TYPE_SUBSCRIPTION);
+        }
+    }
+
+    /**
+     * Move a calendar from one user to another
+     *
+     * @param string $uriName
+     * @param string $uriOrigin
+     * @param string $uriDestination
+     */
+    public function moveCalendar($uriName, $uriOrigin, $uriDestination) {
+        $query = $this->db->getQueryBuilder();
+        $query->update('calendars')
+            ->set('principaluri', $query->createNamedParameter($uriDestination))
+            ->where($query->expr()->eq('principaluri', $query->createNamedParameter($uriOrigin)))
+            ->andWhere($query->expr()->eq('uri', $query->createNamedParameter($uriName)))
+            ->execute();
+    }
+
+    /**
+     * read VCalendar data into a VCalendar object
+     *
+     * @param string $objectData
+     * @return VCalendar
+     */
+    protected function readCalendarData($objectData) {
+        return Reader::read($objectData);
+    }
+
+    /**
+     * delete all properties from a given calendar object
+     *
+     * @param int $calendarId
+     * @param int $objectId
+     */
+    protected function purgeProperties($calendarId, $objectId) {
+        $query = $this->db->getQueryBuilder();
+        $query->delete($this->dbObjectPropertiesTable)
+            ->where($query->expr()->eq('objectid', $query->createNamedParameter($objectId)))
+            ->andWhere($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)));
+        $query->execute();
+    }
+
+    /**
+     * get ID from a given calendar object
+     *
+     * @param int $calendarId
+     * @param string $uri
+     * @param int $calendarType
+     * @return int
+     */
+    protected function getCalendarObjectId($calendarId, $uri, $calendarType):int {
+        $query = $this->db->getQueryBuilder();
+        $query->select('id')
+            ->from('calendarobjects')
+            ->where($query->expr()->eq('uri', $query->createNamedParameter($uri)))
+            ->andWhere($query->expr()->eq('calendarid', $query->createNamedParameter($calendarId)))
+            ->andWhere($query->expr()->eq('calendartype', $query->createNamedParameter($calendarType)));
+
+        $result = $query->execute();
+        $objectIds = $result->fetch();
+        $result->closeCursor();
+
+        if (!isset($objectIds['id'])) {
+            throw new \InvalidArgumentException('Calendarobject does not exists: ' . $uri);
+        }
+
+        return (int)$objectIds['id'];
+    }
+
+    /**
+     * return legacy endpoint principal name to new principal name
+     *
+     * @param $principalUri
+     * @param $toV2
+     * @return string
+     */
+    private function convertPrincipal($principalUri, $toV2) {
+        if ($this->principalBackend->getPrincipalPrefix() === 'principals') {
+            list(, $name) = Uri\split($principalUri);
+            if ($toV2 === true) {
+                return "principals/users/$name";
+            }
+            return "principals/$name";
+        }
+        return $principalUri;
+    }
+
+    /**
+     * adds information about an owner to the calendar data
+     *
+     * @param $calendarInfo
+     */
+    private function addOwnerPrincipal(&$calendarInfo) {
+        $ownerPrincipalKey = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal';
+        $displaynameKey = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_NEXTCLOUD . '}owner-displayname';
+        if (isset($calendarInfo[$ownerPrincipalKey])) {
+            $uri = $calendarInfo[$ownerPrincipalKey];
+        } else {
+            $uri = $calendarInfo['principaluri'];
+        }
+
+        $principalInformation = $this->principalBackend->getPrincipalByPath($uri);
+        if (isset($principalInformation['{DAV:}displayname'])) {
+            $calendarInfo[$displaynameKey] = $principalInformation['{DAV:}displayname'];
+        }
+    }
 }

Spacing +134 added lines, -134 removed lines

@@ -247,7 +247,7 @@ 
 			$query->andWhere($query->expr()->neq('uri', $query->createNamedParameter(BirthdayService::BIRTHDAY_CALENDAR_URI)));
 		}
 
-		return (int)$query->execute()->fetchColumn();
+		return (int) $query->execute()->fetchColumn();
 	}
 
 	/**
@@ -297,18 +297,18 @@ 
 		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
 			$components = [];
 			if ($row['components']) {
-				$components = explode(',',$row['components']);
+				$components = explode(',', $row['components']);
 			}
 
 			$calendar = [
 				'id' => $row['id'],
 				'uri' => $row['uri'],
 				'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
+				'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+				'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+				'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
+				'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}owner-principal' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
 			];
 
 			foreach ($this->propertyMap as $xmlName=>$dbName) {
@@ -328,10 +328,10 @@ 
 		$principals = $this->principalBackend->getGroupMembership($principalUriOriginal, true);
 		$principals = array_merge($principals, $this->principalBackend->getCircleMembership($principalUriOriginal));
 
-		$principals = array_map(function ($principal) {
+		$principals = array_map(function($principal) {
 			return urldecode($principal);
 		}, $principals);
-		$principals[]= $principalUri;
+		$principals[] = $principalUri;
 
 		$fields = array_values($this->propertyMap);
 		$fields[] = 'a.id';
@@ -351,7 +351,7 @@ 
 			->setParameter('principaluri', $principals, \Doctrine\DBAL\Connection::PARAM_STR_ARRAY)
 			->execute();
 
-		$readOnlyPropertyName = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only';
+		$readOnlyPropertyName = '{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}read-only';
 		while ($row = $result->fetch()) {
 			if ($row['principaluri'] === $principalUri) {
 				continue;
@@ -371,21 +371,21 @@ 
 			}
 
 			list(, $name) = Uri\split($row['principaluri']);
-			$uri = $row['uri'] . '_shared_by_' . $name;
-			$row['displayname'] = $row['displayname'] . ' (' . $this->getUserDisplayName($name) . ')';
+			$uri = $row['uri'].'_shared_by_'.$name;
+			$row['displayname'] = $row['displayname'].' ('.$this->getUserDisplayName($name).')';
 			$components = [];
 			if ($row['components']) {
-				$components = explode(',',$row['components']);
+				$components = explode(',', $row['components']);
 			}
 			$calendar = [
 				'id' => $row['id'],
 				'uri' => $uri,
 				'principaluri' => $this->convertPrincipal($principalUri, !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp('transparent'),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+				'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+				'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+				'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp('transparent'),
+				'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
 				$readOnlyPropertyName => $readOnly,
 			];
 
@@ -425,16 +425,16 @@ 
 		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
 			$components = [];
 			if ($row['components']) {
-				$components = explode(',',$row['components']);
+				$components = explode(',', $row['components']);
 			}
 			$calendar = [
 				'id' => $row['id'],
 				'uri' => $row['uri'],
 				'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+				'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+				'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+				'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
 			];
 			foreach ($this->propertyMap as $xmlName=>$dbName) {
 				$calendar[$xmlName] = $row[$dbName];
@@ -493,22 +493,22 @@ 
 
 		while ($row = $result->fetch()) {
 			list(, $name) = Uri\split($row['principaluri']);
-			$row['displayname'] = $row['displayname'] . "($name)";
+			$row['displayname'] = $row['displayname']."($name)";
 			$components = [];
 			if ($row['components']) {
-				$components = explode(',',$row['components']);
+				$components = explode(',', $row['components']);
 			}
 			$calendar = [
 				'id' => $row['id'],
 				'uri' => $row['publicuri'],
 				'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-				'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-				'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], $this->legacyEndpoint),
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
-				'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}public' => (int)$row['access'] === self::ACCESS_PUBLIC,
+				'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+				'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+				'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
+				'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}owner-principal' => $this->convertPrincipal($row['principaluri'], $this->legacyEndpoint),
+				'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}read-only' => (int) $row['access'] === Backend::ACCESS_READ,
+				'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}public' => (int) $row['access'] === self::ACCESS_PUBLIC,
 			];
 
 			foreach ($this->propertyMap as $xmlName=>$dbName) {
@@ -555,26 +555,26 @@ 
 		$result->closeCursor();
 
 		if ($row === false) {
-			throw new NotFound('Node with name \'' . $uri . '\' could not be found');
+			throw new NotFound('Node with name \''.$uri.'\' could not be found');
 		}
 
 		list(, $name) = Uri\split($row['principaluri']);
-		$row['displayname'] = $row['displayname'] . ' ' . "($name)";
+		$row['displayname'] = $row['displayname'].' '."($name)";
 		$components = [];
 		if ($row['components']) {
-			$components = explode(',',$row['components']);
+			$components = explode(',', $row['components']);
 		}
 		$calendar = [
 			'id' => $row['id'],
 			'uri' => $row['publicuri'],
 			'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-			'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-			'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}read-only' => (int)$row['access'] === Backend::ACCESS_READ,
-			'{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}public' => (int)$row['access'] === self::ACCESS_PUBLIC,
+			'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+			'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+			'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+			'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
+			'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}owner-principal' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
+			'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}read-only' => (int) $row['access'] === Backend::ACCESS_READ,
+			'{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}public' => (int) $row['access'] === self::ACCESS_PUBLIC,
 		];
 
 		foreach ($this->propertyMap as $xmlName=>$dbName) {
@@ -616,17 +616,17 @@ 
 
 		$components = [];
 		if ($row['components']) {
-			$components = explode(',',$row['components']);
+			$components = explode(',', $row['components']);
 		}
 
 		$calendar = [
 			'id' => $row['id'],
 			'uri' => $row['uri'],
 			'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-			'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+			'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+			'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+			'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+			'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
 		];
 
 		foreach ($this->propertyMap as $xmlName=>$dbName) {
@@ -666,17 +666,17 @@ 
 
 		$components = [];
 		if ($row['components']) {
-			$components = explode(',',$row['components']);
+			$components = explode(',', $row['components']);
 		}
 
 		$calendar = [
 			'id' => $row['id'],
 			'uri' => $row['uri'],
 			'principaluri' => $this->convertPrincipal($row['principaluri'], !$this->legacyEndpoint),
-			'{' . Plugin::NS_CALENDARSERVER . '}getctag' => 'http://sabre.io/ns/sync/' . ($row['synctoken']?$row['synctoken']:'0'),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
-			'{' . Plugin::NS_CALDAV . '}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
+			'{'.Plugin::NS_CALENDARSERVER.'}getctag' => 'http://sabre.io/ns/sync/'.($row['synctoken'] ? $row['synctoken'] : '0'),
+			'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
+			'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet($components),
+			'{'.Plugin::NS_CALDAV.'}schedule-calendar-transp' => new ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
 		];
 
 		foreach ($this->propertyMap as $xmlName=>$dbName) {
@@ -705,7 +705,7 @@ 
 			->from('calendarsubscriptions')
 			->where($query->expr()->eq('id', $query->createNamedParameter($subscriptionId)))
 			->orderBy('calendarorder', 'asc');
-		$stmt =$query->execute();
+		$stmt = $query->execute();
 
 		$row = $stmt->fetch(\PDO::FETCH_ASSOC);
 		$stmt->closeCursor();
@@ -719,8 +719,8 @@ 
 			'principaluri' => $row['principaluri'],
 			'source'       => $row['source'],
 			'lastmodified' => $row['lastmodified'],
-			'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
-			'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+			'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
+			'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
 		];
 
 		foreach ($this->subscriptionPropertyMap as $xmlName=>$dbName) {
@@ -757,16 +757,16 @@ 
 		$sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
 		if (isset($properties[$sccs])) {
 			if (!($properties[$sccs] instanceof SupportedCalendarComponentSet)) {
-				throw new DAV\Exception('The ' . $sccs . ' property must be of type: \Sabre\CalDAV\Property\SupportedCalendarComponentSet');
+				throw new DAV\Exception('The '.$sccs.' property must be of type: \Sabre\CalDAV\Property\SupportedCalendarComponentSet');
 			}
-			$values['components'] = implode(',',$properties[$sccs]->getValue());
+			$values['components'] = implode(',', $properties[$sccs]->getValue());
 		} elseif (isset($properties['components'])) {
 			// Allow to provide components internally without having
 			// to create a SupportedCalendarComponentSet object
 			$values['components'] = $properties['components'];
 		}
 
-		$transp = '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp';
+		$transp = '{'.Plugin::NS_CALDAV.'}schedule-calendar-transp';
 		if (isset($properties[$transp])) {
 			$values['transparent'] = (int) ($properties[$transp]->getValue() === 'transparent');
 		}
@@ -786,7 +786,7 @@ 
 		$calendarId = $query->getLastInsertId();
 
 		$calendarData = $this->getCalendarById($calendarId);
-		$this->dispatcher->dispatchTyped(new CalendarCreatedEvent((int)$calendarId, $calendarData));
+		$this->dispatcher->dispatchTyped(new CalendarCreatedEvent((int) $calendarId, $calendarData));
 		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendar', new GenericEvent(
 			'\OCA\DAV\CalDAV\CalDavBackend::createCalendar',
 			[
@@ -815,13 +815,13 @@ 
 	 */
 	public function updateCalendar($calendarId, PropPatch $propPatch) {
 		$supportedProperties = array_keys($this->propertyMap);
-		$supportedProperties[] = '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp';
+		$supportedProperties[] = '{'.Plugin::NS_CALDAV.'}schedule-calendar-transp';
 
-		$propPatch->handle($supportedProperties, function ($mutations) use ($calendarId) {
+		$propPatch->handle($supportedProperties, function($mutations) use ($calendarId) {
 			$newValues = [];
 			foreach ($mutations as $propertyName => $propertyValue) {
 				switch ($propertyName) {
-					case '{' . Plugin::NS_CALDAV . '}schedule-calendar-transp':
+					case '{'.Plugin::NS_CALDAV.'}schedule-calendar-transp':
 						$fieldName = 'transparent';
 						$newValues[$fieldName] = (int) ($propertyValue->getValue() === 'transparent');
 						break;
@@ -843,7 +843,7 @@ 
 
 			$calendarData = $this->getCalendarById($calendarId);
 			$shares = $this->getShares($calendarId);
-			$this->dispatcher->dispatchTyped(new CalendarUpdatedEvent((int)$calendarId, $calendarData, $shares, $mutations));
+			$this->dispatcher->dispatchTyped(new CalendarUpdatedEvent((int) $calendarId, $calendarData, $shares, $mutations));
 			$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendar', new GenericEvent(
 				'\OCA\DAV\CalDAV\CalDavBackend::updateCalendar',
 				[
@@ -893,7 +893,7 @@ 
 			->execute();
 
 		if ($calendarData) {
-			$this->dispatcher->dispatchTyped(new CalendarDeletedEvent((int)$calendarId, $calendarData, $shares));
+			$this->dispatcher->dispatchTyped(new CalendarDeletedEvent((int) $calendarId, $calendarData, $shares));
 		}
 	}
 
@@ -939,7 +939,7 @@ 
 	 * @param int $calendarType
 	 * @return array
 	 */
-	public function getCalendarObjects($calendarId, $calendarType=self::CALENDAR_TYPE_CALENDAR):array {
+	public function getCalendarObjects($calendarId, $calendarType = self::CALENDAR_TYPE_CALENDAR):array {
 		$query = $this->db->getQueryBuilder();
 		$query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'componenttype', 'classification'])
 			->from('calendarobjects')
@@ -953,11 +953,11 @@ 
 				'id'           => $row['id'],
 				'uri'          => $row['uri'],
 				'lastmodified' => $row['lastmodified'],
-				'etag'         => '"' . $row['etag'] . '"',
+				'etag'         => '"'.$row['etag'].'"',
 				'calendarid'   => $row['calendarid'],
-				'size'         => (int)$row['size'],
+				'size'         => (int) $row['size'],
 				'component'    => strtolower($row['componenttype']),
-				'classification'=> (int)$row['classification']
+				'classification'=> (int) $row['classification']
 			];
 		}
 
@@ -981,7 +981,7 @@ 
 	 * @param int $calendarType
 	 * @return array|null
 	 */
-	public function getCalendarObject($calendarId, $objectUri, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+	public function getCalendarObject($calendarId, $objectUri, $calendarType = self::CALENDAR_TYPE_CALENDAR) {
 		$query = $this->db->getQueryBuilder();
 		$query->select(['id', 'uri', 'lastmodified', 'etag', 'calendarid', 'size', 'calendardata', 'componenttype', 'classification'])
 			->from('calendarobjects')
@@ -999,12 +999,12 @@ 
 			'id'            => $row['id'],
 			'uri'           => $row['uri'],
 			'lastmodified'  => $row['lastmodified'],
-			'etag'          => '"' . $row['etag'] . '"',
+			'etag'          => '"'.$row['etag'].'"',
 			'calendarid'    => $row['calendarid'],
-			'size'          => (int)$row['size'],
+			'size'          => (int) $row['size'],
 			'calendardata'  => $this->readBlob($row['calendardata']),
 			'component'     => strtolower($row['componenttype']),
-			'classification'=> (int)$row['classification']
+			'classification'=> (int) $row['classification']
 		];
 	}
 
@@ -1021,7 +1021,7 @@ 
 	 * @param int $calendarType
 	 * @return array
 	 */
-	public function getMultipleCalendarObjects($calendarId, array $uris, $calendarType=self::CALENDAR_TYPE_CALENDAR):array {
+	public function getMultipleCalendarObjects($calendarId, array $uris, $calendarType = self::CALENDAR_TYPE_CALENDAR):array {
 		if (empty($uris)) {
 			return [];
 		}
@@ -1045,12 +1045,12 @@ 
 					'id'           => $row['id'],
 					'uri'          => $row['uri'],
 					'lastmodified' => $row['lastmodified'],
-					'etag'         => '"' . $row['etag'] . '"',
+					'etag'         => '"'.$row['etag'].'"',
 					'calendarid'   => $row['calendarid'],
-					'size'         => (int)$row['size'],
+					'size'         => (int) $row['size'],
 					'calendardata' => $this->readBlob($row['calendardata']),
 					'component'    => strtolower($row['componenttype']),
-					'classification' => (int)$row['classification']
+					'classification' => (int) $row['classification']
 				];
 			}
 			$result->closeCursor();
@@ -1078,7 +1078,7 @@ 
 	 * @param int $calendarType
 	 * @return string
 	 */
-	public function createCalendarObject($calendarId, $objectUri, $calendarData, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+	public function createCalendarObject($calendarId, $objectUri, $calendarData, $calendarType = self::CALENDAR_TYPE_CALENDAR) {
 		$extraData = $this->getDenormalizedData($calendarData);
 
 		$q = $this->db->getQueryBuilder();
@@ -1122,7 +1122,7 @@ 
 			$calendarRow = $this->getCalendarById($calendarId);
 			$shares = $this->getShares($calendarId);
 
-			$this->dispatcher->dispatchTyped(new CalendarObjectCreatedEvent((int)$calendarId, $calendarRow, $shares, $objectRow));
+			$this->dispatcher->dispatchTyped(new CalendarObjectCreatedEvent((int) $calendarId, $calendarRow, $shares, $objectRow));
 			$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject', new GenericEvent(
 				'\OCA\DAV\CalDAV\CalDavBackend::createCalendarObject',
 				[
@@ -1135,7 +1135,7 @@ 
 		} else {
 			$subscriptionRow = $this->getSubscriptionById($calendarId);
 
-			$this->dispatcher->dispatchTyped(new CachedCalendarObjectCreatedEvent((int)$calendarId, $subscriptionRow, [], $objectRow));
+			$this->dispatcher->dispatchTyped(new CachedCalendarObjectCreatedEvent((int) $calendarId, $subscriptionRow, [], $objectRow));
 			$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createCachedCalendarObject', new GenericEvent(
 				'\OCA\DAV\CalDAV\CalDavBackend::createCachedCalendarObject',
 				[
@@ -1147,7 +1147,7 @@ 
 			));
 		}
 
-		return '"' . $extraData['etag'] . '"';
+		return '"'.$extraData['etag'].'"';
 	}
 
 	/**
@@ -1169,7 +1169,7 @@ 
 	 * @param int $calendarType
 	 * @return string
 	 */
-	public function updateCalendarObject($calendarId, $objectUri, $calendarData, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+	public function updateCalendarObject($calendarId, $objectUri, $calendarData, $calendarType = self::CALENDAR_TYPE_CALENDAR) {
 		$extraData = $this->getDenormalizedData($calendarData);
 		$query = $this->db->getQueryBuilder();
 		$query->update('calendarobjects')
@@ -1196,7 +1196,7 @@ 
 				$calendarRow = $this->getCalendarById($calendarId);
 				$shares = $this->getShares($calendarId);
 
-				$this->dispatcher->dispatchTyped(new CalendarObjectUpdatedEvent((int)$calendarId, $calendarRow, $shares, $objectRow));
+				$this->dispatcher->dispatchTyped(new CalendarObjectUpdatedEvent((int) $calendarId, $calendarRow, $shares, $objectRow));
 				$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject', new GenericEvent(
 					'\OCA\DAV\CalDAV\CalDavBackend::updateCalendarObject',
 					[
@@ -1209,7 +1209,7 @@ 
 			} else {
 				$subscriptionRow = $this->getSubscriptionById($calendarId);
 
-				$this->dispatcher->dispatchTyped(new CachedCalendarObjectUpdatedEvent((int)$calendarId, $subscriptionRow, [], $objectRow));
+				$this->dispatcher->dispatchTyped(new CachedCalendarObjectUpdatedEvent((int) $calendarId, $subscriptionRow, [], $objectRow));
 				$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateCachedCalendarObject', new GenericEvent(
 					'\OCA\DAV\CalDAV\CalDavBackend::updateCachedCalendarObject',
 					[
@@ -1222,7 +1222,7 @@ 
 			}
 		}
 
-		return '"' . $extraData['etag'] . '"';
+		return '"'.$extraData['etag'].'"';
 	}
 
 	/**
@@ -1252,14 +1252,14 @@ 
 	 * @param int $calendarType
 	 * @return void
 	 */
-	public function deleteCalendarObject($calendarId, $objectUri, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+	public function deleteCalendarObject($calendarId, $objectUri, $calendarType = self::CALENDAR_TYPE_CALENDAR) {
 		$data = $this->getCalendarObject($calendarId, $objectUri, $calendarType);
 		if (is_array($data)) {
 			if ($calendarType === self::CALENDAR_TYPE_CALENDAR) {
 				$calendarRow = $this->getCalendarById($calendarId);
 				$shares = $this->getShares($calendarId);
 
-				$this->dispatcher->dispatchTyped(new CalendarObjectDeletedEvent((int)$calendarId, $calendarRow, $shares, $data));
+				$this->dispatcher->dispatchTyped(new CalendarObjectDeletedEvent((int) $calendarId, $calendarRow, $shares, $data));
 				$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject', new GenericEvent(
 					'\OCA\DAV\CalDAV\CalDavBackend::deleteCalendarObject',
 					[
@@ -1272,7 +1272,7 @@ 
 			} else {
 				$subscriptionRow = $this->getSubscriptionById($calendarId);
 
-				$this->dispatcher->dispatchTyped(new CachedCalendarObjectDeletedEvent((int)$calendarId, $subscriptionRow, [], $data));
+				$this->dispatcher->dispatchTyped(new CachedCalendarObjectDeletedEvent((int) $calendarId, $subscriptionRow, [], $data));
 				$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::deleteCachedCalendarObject', new GenericEvent(
 					'\OCA\DAV\CalDAV\CalDavBackend::deleteCachedCalendarObject',
 					[
@@ -1345,7 +1345,7 @@ 
 	 * @param int $calendarType
 	 * @return array
 	 */
-	public function calendarQuery($calendarId, array $filters, $calendarType=self::CALENDAR_TYPE_CALENDAR):array {
+	public function calendarQuery($calendarId, array $filters, $calendarType = self::CALENDAR_TYPE_CALENDAR):array {
 		$componentType = null;
 		$requirePostFilter = true;
 		$timeRange = null;
@@ -1439,7 +1439,7 @@ 
 	 * @param integer|null $offset
 	 * @return array
 	 */
-	public function calendarSearch($principalUri, array $filters, $limit=null, $offset=null) {
+	public function calendarSearch($principalUri, array $filters, $limit = null, $offset = null) {
 		$calendars = $this->getCalendarsForUser($principalUri);
 		$ownCalendars = [];
 		$sharedCalendars = [];
@@ -1544,7 +1544,7 @@ 
 
 		$result = [];
 		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			$path = $uriMapper[$row['calendarid']] . '/' . $row['uri'];
+			$path = $uriMapper[$row['calendarid']].'/'.$row['uri'];
 			if (!in_array($path, $result)) {
 				$result[] = $path;
 			}
@@ -1592,8 +1592,8 @@ 
 
 		if ($pattern !== '') {
 			$innerQuery->andWhere($innerQuery->expr()->iLike('op.value',
-				$outerQuery->createNamedParameter('%' .
-					$this->db->escapeLikeParameter($pattern) . '%')));
+				$outerQuery->createNamedParameter('%'.
+					$this->db->escapeLikeParameter($pattern).'%')));
 		}
 
 		$outerQuery->select('c.id', 'c.calendardata', 'c.componenttype', 'c.uid', 'c.uri')
@@ -1632,7 +1632,7 @@ 
 		$result = $outerQuery->execute();
 		$calendarObjects = $result->fetchAll();
 
-		return array_map(function ($o) {
+		return array_map(function($o) {
 			$calendarData = Reader::read($o['calendardata']);
 			$comps = $calendarData->getComponents();
 			$objects = [];
@@ -1650,10 +1650,10 @@ 
 				'type' => $o['componenttype'],
 				'uid' => $o['uid'],
 				'uri' => $o['uri'],
-				'objects' => array_map(function ($c) {
+				'objects' => array_map(function($c) {
 					return $this->transformSearchData($c);
 				}, $objects),
-				'timezones' => array_map(function ($c) {
+				'timezones' => array_map(function($c) {
 					return $this->transformSearchData($c);
 				}, $timezones),
 			];
@@ -1669,7 +1669,7 @@ 
 		/** @var Component[] $subComponents */
 		$subComponents = $comp->getComponents();
 		/** @var Property[] $properties */
-		$properties = array_filter($comp->children(), function ($c) {
+		$properties = array_filter($comp->children(), function($c) {
 			return $c instanceof Property;
 		});
 		$validationRules = $comp->getValidationRules();
@@ -1747,7 +1747,7 @@ 
 		$subscriptions = $this->getSubscriptionsForUser($principalUri);
 		foreach ($calendars as $calendar) {
 			$calendarAnd = $calendarObjectIdQuery->expr()->andX();
-			$calendarAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendarid', $calendarObjectIdQuery->createNamedParameter((int)$calendar['id'])));
+			$calendarAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendarid', $calendarObjectIdQuery->createNamedParameter((int) $calendar['id'])));
 			$calendarAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendartype', $calendarObjectIdQuery->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)));
 
 			// If it's shared, limit search to public events
@@ -1759,7 +1759,7 @@ 
 		}
 		foreach ($subscriptions as $subscription) {
 			$subscriptionAnd = $calendarObjectIdQuery->expr()->andX();
-			$subscriptionAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendarid', $calendarObjectIdQuery->createNamedParameter((int)$subscription['id'])));
+			$subscriptionAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendarid', $calendarObjectIdQuery->createNamedParameter((int) $subscription['id'])));
 			$subscriptionAnd->add($calendarObjectIdQuery->expr()->eq('cob.calendartype', $calendarObjectIdQuery->createNamedParameter(self::CALENDAR_TYPE_SUBSCRIPTION)));
 
 			// If it's shared, limit search to public events
@@ -1803,7 +1803,7 @@ 
 			if (!$escapePattern) {
 				$calendarObjectIdQuery->andWhere($calendarObjectIdQuery->expr()->ilike('cob.value', $calendarObjectIdQuery->createNamedParameter($pattern)));
 			} else {
-				$calendarObjectIdQuery->andWhere($calendarObjectIdQuery->expr()->ilike('cob.value', $calendarObjectIdQuery->createNamedParameter('%' . $this->db->escapeLikeParameter($pattern) . '%')));
+				$calendarObjectIdQuery->andWhere($calendarObjectIdQuery->expr()->ilike('cob.value', $calendarObjectIdQuery->createNamedParameter('%'.$this->db->escapeLikeParameter($pattern).'%')));
 			}
 		}
 
@@ -1817,7 +1817,7 @@ 
 		$result = $calendarObjectIdQuery->execute();
 		$matches = $result->fetchAll();
 		$result->closeCursor();
-		$matches = array_map(static function (array $match):int {
+		$matches = array_map(static function(array $match):int {
 			return (int) $match['objectid'];
 		}, $matches);
 
@@ -1830,9 +1830,9 @@ 
 		$calendarObjects = $result->fetchAll();
 		$result->closeCursor();
 
-		return array_map(function (array $array): array {
-			$array['calendarid'] = (int)$array['calendarid'];
-			$array['calendartype'] = (int)$array['calendartype'];
+		return array_map(function(array $array): array {
+			$array['calendarid'] = (int) $array['calendarid'];
+			$array['calendartype'] = (int) $array['calendartype'];
 			$array['calendardata'] = $this->readBlob($array['calendardata']);
 
 			return $array;
@@ -1869,7 +1869,7 @@ 
 		$stmt = $query->execute();
 
 		if ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-			return $row['calendaruri'] . '/' . $row['objecturi'];
+			return $row['calendaruri'].'/'.$row['objecturi'];
 		}
 
 		return null;
@@ -1932,10 +1932,10 @@ 
 	 * @param int $calendarType
 	 * @return array
 	 */
-	public function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+	public function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null, $calendarType = self::CALENDAR_TYPE_CALENDAR) {
 		// Current synctoken
 		$stmt = $this->db->prepare('SELECT `synctoken` FROM `*PREFIX*calendars` WHERE `id` = ?');
-		$stmt->execute([ $calendarId ]);
+		$stmt->execute([$calendarId]);
 		$currentToken = $stmt->fetchColumn(0);
 
 		if (is_null($currentToken)) {
@@ -1951,8 +1951,8 @@ 
 
 		if ($syncToken) {
 			$query = "SELECT `uri`, `operation` FROM `*PREFIX*calendarchanges` WHERE `synctoken` >= ? AND `synctoken` < ? AND `calendarid` = ? AND `calendartype` = ? ORDER BY `synctoken`";
-			if ($limit>0) {
-				$query.= " LIMIT " . (int)$limit;
+			if ($limit > 0) {
+				$query .= " LIMIT ".(int) $limit;
 			}
 
 			// Fetching all changes
@@ -2037,7 +2037,7 @@ 
 			->from('calendarsubscriptions')
 			->where($query->expr()->eq('principaluri', $query->createNamedParameter($principalUri)))
 			->orderBy('calendarorder', 'asc');
-		$stmt =$query->execute();
+		$stmt = $query->execute();
 
 		$subscriptions = [];
 		while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
@@ -2048,8 +2048,8 @@ 
 				'source'       => $row['source'],
 				'lastmodified' => $row['lastmodified'],
 
-				'{' . Plugin::NS_CALDAV . '}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
-				'{http://sabredav.org/ns}sync-token' => $row['synctoken']?$row['synctoken']:'0',
+				'{'.Plugin::NS_CALDAV.'}supported-calendar-component-set' => new SupportedCalendarComponentSet(['VTODO', 'VEVENT']),
+				'{http://sabredav.org/ns}sync-token' => $row['synctoken'] ? $row['synctoken'] : '0',
 			];
 
 			foreach ($this->subscriptionPropertyMap as $xmlName=>$dbName) {
@@ -2113,7 +2113,7 @@ 
 		$subscriptionId = $this->db->lastInsertId('*PREFIX*calendarsubscriptions');
 
 		$subscriptionRow = $this->getSubscriptionById($subscriptionId);
-		$this->dispatcher->dispatchTyped(new SubscriptionCreatedEvent((int)$subscriptionId, $subscriptionRow));
+		$this->dispatcher->dispatchTyped(new SubscriptionCreatedEvent((int) $subscriptionId, $subscriptionRow));
 		$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::createSubscription', new GenericEvent(
 			'\OCA\DAV\CalDAV\CalDavBackend::createSubscription',
 			[
@@ -2144,7 +2144,7 @@ 
 		$supportedProperties = array_keys($this->subscriptionPropertyMap);
 		$supportedProperties[] = '{http://calendarserver.org/ns/}source';
 
-		$propPatch->handle($supportedProperties, function ($mutations) use ($subscriptionId) {
+		$propPatch->handle($supportedProperties, function($mutations) use ($subscriptionId) {
 			$newValues = [];
 
 			foreach ($mutations as $propertyName=>$propertyValue) {
@@ -2166,7 +2166,7 @@ 
 				->execute();
 
 			$subscriptionRow = $this->getSubscriptionById($subscriptionId);
-			$this->dispatcher->dispatchTyped(new SubscriptionUpdatedEvent((int)$subscriptionId, $subscriptionRow, [], $mutations));
+			$this->dispatcher->dispatchTyped(new SubscriptionUpdatedEvent((int) $subscriptionId, $subscriptionRow, [], $mutations));
 			$this->legacyDispatcher->dispatch('\OCA\DAV\CalDAV\CalDavBackend::updateSubscription', new GenericEvent(
 				'\OCA\DAV\CalDAV\CalDavBackend::updateSubscription',
 				[
@@ -2217,7 +2217,7 @@ 
 			->execute();
 
 		if ($subscriptionRow) {
-			$this->dispatcher->dispatchTyped(new SubscriptionDeletedEvent((int)$subscriptionId, $subscriptionRow, []));
+			$this->dispatcher->dispatchTyped(new SubscriptionDeletedEvent((int) $subscriptionId, $subscriptionRow, []));
 		}
 	}
 
@@ -2255,8 +2255,8 @@ 
 			'uri'          => $row['uri'],
 			'calendardata' => $row['calendardata'],
 			'lastmodified' => $row['lastmodified'],
-			'etag'         => '"' . $row['etag'] . '"',
-			'size'         => (int)$row['size'],
+			'etag'         => '"'.$row['etag'].'"',
+			'size'         => (int) $row['size'],
 		];
 	}
 
@@ -2284,8 +2284,8 @@ 
 				'calendardata' => $row['calendardata'],
 				'uri'          => $row['uri'],
 				'lastmodified' => $row['lastmodified'],
-				'etag'         => '"' . $row['etag'] . '"',
-				'size'         => (int)$row['size'],
+				'etag'         => '"'.$row['etag'].'"',
+				'size'         => (int) $row['size'],
 			];
 		}
 
@@ -2338,14 +2338,14 @@ 
 	 * @param int $calendarType
 	 * @return void
 	 */
-	protected function addChange($calendarId, $objectUri, $operation, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
-		$table = $calendarType === self::CALENDAR_TYPE_CALENDAR ? 'calendars': 'calendarsubscriptions';
+	protected function addChange($calendarId, $objectUri, $operation, $calendarType = self::CALENDAR_TYPE_CALENDAR) {
+		$table = $calendarType === self::CALENDAR_TYPE_CALENDAR ? 'calendars' : 'calendarsubscriptions';
 
 		$query = $this->db->getQueryBuilder();
 		$query->select('synctoken')
 			->from($table)
 			->where($query->expr()->eq('id', $query->createNamedParameter($calendarId)));
-		$syncToken = (int)$query->execute()->fetchColumn();
+		$syncToken = (int) $query->execute()->fetchColumn();
 
 		$query = $this->db->getQueryBuilder();
 		$query->insert('calendarchanges')
@@ -2388,9 +2388,9 @@ 
 		$uid = null;
 		$classification = self::CLASSIFICATION_PUBLIC;
 		foreach ($vObject->getComponents() as $component) {
-			if ($component->name!=='VTIMEZONE') {
+			if ($component->name !== 'VTIMEZONE') {
 				$componentType = $component->name;
-				$uid = (string)$component->UID;
+				$uid = (string) $component->UID;
 				break;
 			}
 		}
@@ -2415,7 +2415,7 @@ 
 					$lastOccurrence = $firstOccurrence;
 				}
 			} else {
-				$it = new EventIterator($vObject, (string)$component->UID);
+				$it = new EventIterator($vObject, (string) $component->UID);
 				$maxDate = new DateTime(self::MAX_DATE);
 				if ($it->isInfinite()) {
 					$lastOccurrence = $maxDate->getTimestamp();
@@ -2485,7 +2485,7 @@ 
 			]));
 		$this->calendarSharingBackend->updateShares($shareable, $add, $remove);
 
-		$this->dispatcher->dispatchTyped(new CalendarShareUpdatedEvent((int)$calendarId, $calendarRow, $oldShares, $add, $remove));
+		$this->dispatcher->dispatchTyped(new CalendarShareUpdatedEvent((int) $calendarId, $calendarRow, $oldShares, $add, $remove));
 	}
 
 	/**
@@ -2493,7 +2493,7 @@ 
 	 * @param int $calendarType
 	 * @return array
 	 */
-	public function getShares($resourceId, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+	public function getShares($resourceId, $calendarType = self::CALENDAR_TYPE_CALENDAR) {
 		return $this->calendarSharingBackend->getShares($resourceId);
 	}
 
@@ -2526,7 +2526,7 @@ 
 				]);
 			$query->execute();
 
-			$this->dispatcher->dispatchTyped(new CalendarPublishedEvent((int)$calendarId, $calendarData, $publicUri));
+			$this->dispatcher->dispatchTyped(new CalendarPublishedEvent((int) $calendarId, $calendarData, $publicUri));
 			return $publicUri;
 		}
 		$query->delete('dav_shares')
@@ -2534,7 +2534,7 @@ 
 			->andWhere($query->expr()->eq('access', $query->createNamedParameter(self::ACCESS_PUBLIC)));
 		$query->execute();
 
-		$this->dispatcher->dispatchTyped(new CalendarUnpublishedEvent((int)$calendarId, $calendarData));
+		$this->dispatcher->dispatchTyped(new CalendarUnpublishedEvent((int) $calendarId, $calendarData));
 		return null;
 	}
 
@@ -2574,7 +2574,7 @@ 
 	 * @param string $calendarData
 	 * @param int $calendarType
 	 */
-	public function updateProperties($calendarId, $objectUri, $calendarData, $calendarType=self::CALENDAR_TYPE_CALENDAR) {
+	public function updateProperties($calendarId, $objectUri, $calendarData, $calendarType = self::CALENDAR_TYPE_CALENDAR) {
 		$objectId = $this->getCalendarObjectId($calendarId, $objectUri, $calendarType);
 
 		try {
@@ -2755,10 +2755,10 @@ 
 		$result->closeCursor();
 
 		if (!isset($objectIds['id'])) {
-			throw new \InvalidArgumentException('Calendarobject does not exists: ' . $uri);
+			throw new \InvalidArgumentException('Calendarobject does not exists: '.$uri);
 		}
 
-		return (int)$objectIds['id'];
+		return (int) $objectIds['id'];
 	}
 
 	/**
@@ -2785,8 +2785,8 @@ 
 	 * @param $calendarInfo
 	 */
 	private function addOwnerPrincipal(&$calendarInfo) {
-		$ownerPrincipalKey = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD . '}owner-principal';
-		$displaynameKey = '{' . \OCA\DAV\DAV\Sharing\Plugin::NS_NEXTCLOUD . '}owner-displayname';
+		$ownerPrincipalKey = '{'.\OCA\DAV\DAV\Sharing\Plugin::NS_OWNCLOUD.'}owner-principal';
+		$displaynameKey = '{'.\OCA\DAV\DAV\Sharing\Plugin::NS_NEXTCLOUD.'}owner-displayname';
 		if (isset($calendarInfo[$ownerPrincipalKey])) {
 			$uri = $calendarInfo[$ownerPrincipalKey];
 		} else {

apps/dav/lib/CalDAV/Reminder/NotificationProvider/PushProvider.php

Indentation +88 added lines, -88 removed lines

@@ -49,101 +49,101 @@
  */
 class PushProvider extends AbstractProvider {
 
-	/** @var string */
-	public const NOTIFICATION_TYPE = 'DISPLAY';
+    /** @var string */
+    public const NOTIFICATION_TYPE = 'DISPLAY';
 
-	/** @var IManager */
-	private $manager;
+    /** @var IManager */
+    private $manager;
 
-	/** @var ITimeFactory */
-	private $timeFactory;
+    /** @var ITimeFactory */
+    private $timeFactory;
 
-	/**
-	 * @param IConfig $config
-	 * @param IManager $manager
-	 * @param ILogger $logger
-	 * @param L10NFactory $l10nFactory
-	 * @param IUrlGenerator $urlGenerator
-	 * @param ITimeFactory $timeFactory
-	 */
-	public function __construct(IConfig $config,
-								IManager $manager,
-								ILogger $logger,
-								L10NFactory $l10nFactory,
-								IURLGenerator $urlGenerator,
-								ITimeFactory $timeFactory) {
-		parent::__construct($logger, $l10nFactory, $urlGenerator, $config);
-		$this->manager = $manager;
-		$this->timeFactory = $timeFactory;
-	}
+    /**
+     * @param IConfig $config
+     * @param IManager $manager
+     * @param ILogger $logger
+     * @param L10NFactory $l10nFactory
+     * @param IUrlGenerator $urlGenerator
+     * @param ITimeFactory $timeFactory
+     */
+    public function __construct(IConfig $config,
+                                IManager $manager,
+                                ILogger $logger,
+                                L10NFactory $l10nFactory,
+                                IURLGenerator $urlGenerator,
+                                ITimeFactory $timeFactory) {
+        parent::__construct($logger, $l10nFactory, $urlGenerator, $config);
+        $this->manager = $manager;
+        $this->timeFactory = $timeFactory;
+    }
 
-	/**
-	 * Send push notification to all users.
-	 *
-	 * @param VEvent $vevent
-	 * @param string $calendarDisplayName
-	 * @param IUser[] $users
-	 * @throws \Exception
-	 */
-	public function send(VEvent $vevent,
-						 string $calendarDisplayName=null,
-						 array $users=[]):void {
-		if ($this->config->getAppValue('dav', 'sendEventRemindersPush', 'no') !== 'yes') {
-			return;
-		}
+    /**
+     * Send push notification to all users.
+     *
+     * @param VEvent $vevent
+     * @param string $calendarDisplayName
+     * @param IUser[] $users
+     * @throws \Exception
+     */
+    public function send(VEvent $vevent,
+                            string $calendarDisplayName=null,
+                            array $users=[]):void {
+        if ($this->config->getAppValue('dav', 'sendEventRemindersPush', 'no') !== 'yes') {
+            return;
+        }
 
-		$eventDetails = $this->extractEventDetails($vevent);
-		$eventDetails['calendar_displayname'] = $calendarDisplayName;
-		$eventUUID = (string) $vevent->UID;
-		if (!$eventUUID) {
-			return;
-		};
-		$eventUUIDHash = hash('sha256', $eventUUID, false);
+        $eventDetails = $this->extractEventDetails($vevent);
+        $eventDetails['calendar_displayname'] = $calendarDisplayName;
+        $eventUUID = (string) $vevent->UID;
+        if (!$eventUUID) {
+            return;
+        };
+        $eventUUIDHash = hash('sha256', $eventUUID, false);
 
-		foreach ($users as $user) {
-			/** @var INotification $notification */
-			$notification = $this->manager->createNotification();
-			$notification->setApp(Application::APP_ID)
-				->setUser($user->getUID())
-				->setDateTime($this->timeFactory->getDateTime())
-				->setObject(Application::APP_ID, $eventUUIDHash)
-				->setSubject('calendar_reminder', [
-					'title' => $eventDetails['title'],
-					'start_atom' => $eventDetails['start_atom']
-				])
-				->setMessage('calendar_reminder', $eventDetails);
+        foreach ($users as $user) {
+            /** @var INotification $notification */
+            $notification = $this->manager->createNotification();
+            $notification->setApp(Application::APP_ID)
+                ->setUser($user->getUID())
+                ->setDateTime($this->timeFactory->getDateTime())
+                ->setObject(Application::APP_ID, $eventUUIDHash)
+                ->setSubject('calendar_reminder', [
+                    'title' => $eventDetails['title'],
+                    'start_atom' => $eventDetails['start_atom']
+                ])
+                ->setMessage('calendar_reminder', $eventDetails);
 
-			$this->manager->notify($notification);
-		}
-	}
+            $this->manager->notify($notification);
+        }
+    }
 
-	/**
-	 * @var VEvent $vevent
-	 * @return array
-	 * @throws \Exception
-	 */
-	protected function extractEventDetails(VEvent $vevent):array {
-		/** @var Property\ICalendar\DateTime $start */
-		$start = $vevent->DTSTART;
-		$end = $this->getDTEndFromEvent($vevent);
+    /**
+     * @var VEvent $vevent
+     * @return array
+     * @throws \Exception
+     */
+    protected function extractEventDetails(VEvent $vevent):array {
+        /** @var Property\ICalendar\DateTime $start */
+        $start = $vevent->DTSTART;
+        $end = $this->getDTEndFromEvent($vevent);
 
-		return [
-			'title' => isset($vevent->SUMMARY)
-				? ((string) $vevent->SUMMARY)
-				: null,
-			'description' => isset($vevent->DESCRIPTION)
-				? ((string) $vevent->DESCRIPTION)
-				: null,
-			'location' => isset($vevent->LOCATION)
-				? ((string) $vevent->LOCATION)
-				: null,
-			'all_day' => $start instanceof Property\ICalendar\Date,
-			'start_atom' => $start->getDateTime()->format(\DateTime::ATOM),
-			'start_is_floating' => $start->isFloating(),
-			'start_timezone' => $start->getDateTime()->getTimezone()->getName(),
-			'end_atom' => $end->getDateTime()->format(\DateTime::ATOM),
-			'end_is_floating' => $end->isFloating(),
-			'end_timezone' => $end->getDateTime()->getTimezone()->getName(),
-		];
-	}
+        return [
+            'title' => isset($vevent->SUMMARY)
+                ? ((string) $vevent->SUMMARY)
+                : null,
+            'description' => isset($vevent->DESCRIPTION)
+                ? ((string) $vevent->DESCRIPTION)
+                : null,
+            'location' => isset($vevent->LOCATION)
+                ? ((string) $vevent->LOCATION)
+                : null,
+            'all_day' => $start instanceof Property\ICalendar\Date,
+            'start_atom' => $start->getDateTime()->format(\DateTime::ATOM),
+            'start_is_floating' => $start->isFloating(),
+            'start_timezone' => $start->getDateTime()->getTimezone()->getName(),
+            'end_atom' => $end->getDateTime()->format(\DateTime::ATOM),
+            'end_is_floating' => $end->isFloating(),
+            'end_timezone' => $end->getDateTime()->getTimezone()->getName(),
+        ];
+    }
 }

apps/dav/lib/CalDAV/Reminder/NotificationProvider/EmailProvider.php

Indentation +442 added lines, -442 removed lines

@@ -51,446 +51,446 @@
  */
 class EmailProvider extends AbstractProvider {
 
-	/** @var string */
-	public const NOTIFICATION_TYPE = 'EMAIL';
-
-	/** @var IMailer */
-	private $mailer;
-
-	/**
-	 * @param IConfig $config
-	 * @param IMailer $mailer
-	 * @param ILogger $logger
-	 * @param L10NFactory $l10nFactory
-	 * @param IUrlGenerator $urlGenerator
-	 */
-	public function __construct(IConfig $config,
-								IMailer $mailer,
-								ILogger $logger,
-								L10NFactory $l10nFactory,
-								IURLGenerator $urlGenerator) {
-		parent::__construct($logger, $l10nFactory, $urlGenerator, $config);
-		$this->mailer = $mailer;
-	}
-
-	/**
-	 * Send out notification via email
-	 *
-	 * @param VEvent $vevent
-	 * @param string $calendarDisplayName
-	 * @param array $users
-	 * @throws \Exception
-	 */
-	public function send(VEvent $vevent,
-						 string $calendarDisplayName,
-						 array $users=[]):void {
-		$fallbackLanguage = $this->getFallbackLanguage();
-
-		$emailAddressesOfSharees = $this->getEMailAddressesOfAllUsersWithWriteAccessToCalendar($users);
-		$emailAddressesOfAttendees = $this->getAllEMailAddressesFromEvent($vevent);
-
-		// Quote from php.net:
-		// If the input arrays have the same string keys, then the later value for that key will overwrite the previous one.
-		// => if there are duplicate email addresses, it will always take the system value
-		$emailAddresses = array_merge(
-			$emailAddressesOfAttendees,
-			$emailAddressesOfSharees
-		);
-
-		$sortedByLanguage = $this->sortEMailAddressesByLanguage($emailAddresses, $fallbackLanguage);
-		$organizer = $this->getOrganizerEMailAndNameFromEvent($vevent);
-
-		foreach ($sortedByLanguage as $lang => $emailAddresses) {
-			if (!$this->hasL10NForLang($lang)) {
-				$lang = $fallbackLanguage;
-			}
-			$l10n = $this->getL10NForLang($lang);
-			$fromEMail = \OCP\Util::getDefaultEmailAddress('reminders-noreply');
-
-			$template = $this->mailer->createEMailTemplate('dav.calendarReminder');
-			$template->addHeader();
-			$this->addSubjectAndHeading($template, $l10n, $vevent);
-			$this->addBulletList($template, $l10n, $calendarDisplayName, $vevent);
-			$template->addFooter();
-
-			foreach ($emailAddresses as $emailAddress) {
-				$message = $this->mailer->createMessage();
-				$message->setFrom([$fromEMail]);
-				if ($organizer) {
-					$message->setReplyTo($organizer);
-				}
-				$message->setTo([$emailAddress]);
-				$message->useTemplate($template);
-
-				try {
-					$failed = $this->mailer->send($message);
-					if ($failed) {
-						$this->logger->error('Unable to deliver message to {failed}', ['app' => 'dav', 'failed' => implode(', ', $failed)]);
-					}
-				} catch (\Exception $ex) {
-					$this->logger->logException($ex, ['app' => 'dav']);
-				}
-			}
-		}
-	}
-
-	/**
-	 * @param IEMailTemplate $template
-	 * @param IL10N $l10n
-	 * @param VEvent $vevent
-	 */
-	private function addSubjectAndHeading(IEMailTemplate $template, IL10N $l10n, VEvent $vevent):void {
-		$template->setSubject('Notification: ' . $this->getTitleFromVEvent($vevent, $l10n));
-		$template->addHeading($this->getTitleFromVEvent($vevent, $l10n));
-	}
-
-	/**
-	 * @param IEMailTemplate $template
-	 * @param IL10N $l10n
-	 * @param string $calendarDisplayName
-	 * @param array $eventData
-	 */
-	private function addBulletList(IEMailTemplate $template,
-								   IL10N $l10n,
-								   string $calendarDisplayName,
-								   VEvent $vevent):void {
-		$template->addBodyListItem($calendarDisplayName, $l10n->t('Calendar:'),
-			$this->getAbsoluteImagePath('actions/info.svg'));
-
-		$template->addBodyListItem($this->generateDateString($l10n, $vevent), $l10n->t('Date:'),
-			$this->getAbsoluteImagePath('places/calendar.svg'));
-
-		if (isset($vevent->LOCATION)) {
-			$template->addBodyListItem((string) $vevent->LOCATION, $l10n->t('Where:'),
-				$this->getAbsoluteImagePath('actions/address.svg'));
-		}
-		if (isset($vevent->DESCRIPTION)) {
-			$template->addBodyListItem((string) $vevent->DESCRIPTION, $l10n->t('Description:'),
-				$this->getAbsoluteImagePath('actions/more.svg'));
-		}
-	}
-
-	/**
-	 * @param string $path
-	 * @return string
-	 */
-	private function getAbsoluteImagePath(string $path):string {
-		return $this->urlGenerator->getAbsoluteURL(
-			$this->urlGenerator->imagePath('core', $path)
-		);
-	}
-
-	/**
-	 * @param VEvent $vevent
-	 * @return array|null
-	 */
-	private function getOrganizerEMailAndNameFromEvent(VEvent $vevent):?array {
-		if (!$vevent->ORGANIZER) {
-			return null;
-		}
-
-		$organizer = $vevent->ORGANIZER;
-		if (strcasecmp($organizer->getValue(), 'mailto:') !== 0) {
-			return null;
-		}
-
-		$organizerEMail = substr($organizer->getValue(), 7);
-
-		$name = $organizer->offsetGet('CN');
-		if ($name instanceof Parameter) {
-			return [$organizerEMail => $name];
-		}
-
-		return [$organizerEMail];
-	}
-
-	/**
-	 * @param array $emails
-	 * @param string $defaultLanguage
-	 * @return array
-	 */
-	private function sortEMailAddressesByLanguage(array $emails,
-												  string $defaultLanguage):array {
-		$sortedByLanguage = [];
-
-		foreach ($emails as $emailAddress => $parameters) {
-			if (isset($parameters['LANG'])) {
-				$lang = $parameters['LANG'];
-			} else {
-				$lang = $defaultLanguage;
-			}
-
-			if (!isset($sortedByLanguage[$lang])) {
-				$sortedByLanguage[$lang] = [];
-			}
-
-			$sortedByLanguage[$lang][] = $emailAddress;
-		}
-
-		return $sortedByLanguage;
-	}
-
-	/**
-	 * @param VEvent $vevent
-	 * @return array
-	 */
-	private function getAllEMailAddressesFromEvent(VEvent $vevent):array {
-		$emailAddresses = [];
-
-		if (isset($vevent->ATTENDEE)) {
-			foreach ($vevent->ATTENDEE as $attendee) {
-				if (!($attendee instanceof VObject\Property)) {
-					continue;
-				}
-
-				$cuType = $this->getCUTypeOfAttendee($attendee);
-				if (\in_array($cuType, ['RESOURCE', 'ROOM', 'UNKNOWN'])) {
-					// Don't send emails to things
-					continue;
-				}
-
-				$partstat = $this->getPartstatOfAttendee($attendee);
-				if ($partstat === 'DECLINED') {
-					// Don't send out emails to people who declined
-					continue;
-				}
-				if ($partstat === 'DELEGATED') {
-					$delegates = $attendee->offsetGet('DELEGATED-TO');
-					if (!($delegates instanceof VObject\Parameter)) {
-						continue;
-					}
-
-					$emailAddressesOfDelegates = $delegates->getParts();
-					foreach ($emailAddressesOfDelegates as $addressesOfDelegate) {
-						if (strcasecmp($addressesOfDelegate, 'mailto:') === 0) {
-							$emailAddresses[substr($addressesOfDelegate, 7)] = [];
-						}
-					}
-
-					continue;
-				}
-
-				$emailAddressOfAttendee = $this->getEMailAddressOfAttendee($attendee);
-				if ($emailAddressOfAttendee !== null) {
-					$properties = [];
-
-					$langProp = $attendee->offsetGet('LANG');
-					if ($langProp instanceof VObject\Parameter) {
-						$properties['LANG'] = $langProp->getValue();
-					}
-
-					$emailAddresses[$emailAddressOfAttendee] = $properties;
-				}
-			}
-		}
-
-		if (isset($vevent->ORGANIZER) && $this->hasAttendeeMailURI($vevent->ORGANIZER)) {
-			$emailAddresses[$this->getEMailAddressOfAttendee($vevent->ORGANIZER)] = [];
-		}
-
-		return $emailAddresses;
-	}
-
-
-
-	/**
-	 * @param VObject\Property $attendee
-	 * @return string
-	 */
-	private function getCUTypeOfAttendee(VObject\Property $attendee):string {
-		$cuType = $attendee->offsetGet('CUTYPE');
-		if ($cuType instanceof VObject\Parameter) {
-			return strtoupper($cuType->getValue());
-		}
-
-		return 'INDIVIDUAL';
-	}
-
-	/**
-	 * @param VObject\Property $attendee
-	 * @return string
-	 */
-	private function getPartstatOfAttendee(VObject\Property $attendee):string {
-		$partstat = $attendee->offsetGet('PARTSTAT');
-		if ($partstat instanceof VObject\Parameter) {
-			return strtoupper($partstat->getValue());
-		}
-
-		return 'NEEDS-ACTION';
-	}
-
-	/**
-	 * @param VObject\Property $attendee
-	 * @return bool
-	 */
-	private function hasAttendeeMailURI(VObject\Property $attendee):bool {
-		return stripos($attendee->getValue(), 'mailto:') === 0;
-	}
-
-	/**
-	 * @param VObject\Property $attendee
-	 * @return string|null
-	 */
-	private function getEMailAddressOfAttendee(VObject\Property $attendee):?string {
-		if (!$this->hasAttendeeMailURI($attendee)) {
-			return null;
-		}
-
-		return substr($attendee->getValue(), 7);
-	}
-
-	/**
-	 * @param array $users
-	 * @return array
-	 */
-	private function getEMailAddressesOfAllUsersWithWriteAccessToCalendar(array $users):array {
-		$emailAddresses = [];
-
-		foreach ($users as $user) {
-			$emailAddress = $user->getEMailAddress();
-			if ($emailAddress) {
-				$lang = $this->l10nFactory->getUserLanguage($user);
-				if ($lang) {
-					$emailAddresses[$emailAddress] = [
-						'LANG' => $lang,
-					];
-				} else {
-					$emailAddresses[$emailAddress] = [];
-				}
-			}
-		}
-
-		return $emailAddresses;
-	}
-
-	/**
-	 * @param IL10N $l10n
-	 * @param VEvent $vevent
-	 * @return string
-	 * @throws \Exception
-	 */
-	private function generateDateString(IL10N $l10n, VEvent $vevent):string {
-		$isAllDay = $vevent->DTSTART instanceof Property\ICalendar\Date;
-
-		/** @var Property\ICalendar\Date | Property\ICalendar\DateTime $dtstart */
-		/** @var Property\ICalendar\Date | Property\ICalendar\DateTime $dtend */
-		/** @var \DateTimeImmutable $dtstartDt */
-		$dtstartDt = $vevent->DTSTART->getDateTime();
-		/** @var \DateTimeImmutable $dtendDt */
-		$dtendDt = $this->getDTEndFromEvent($vevent)->getDateTime();
-
-		$diff = $dtstartDt->diff($dtendDt);
-
-		$dtstartDt = new \DateTime($dtstartDt->format(\DateTime::ATOM));
-		$dtendDt = new \DateTime($dtendDt->format(\DateTime::ATOM));
-
-		if ($isAllDay) {
-			// One day event
-			if ($diff->days === 1) {
-				return $this->getDateString($l10n, $dtstartDt);
-			}
-
-			return implode(' - ', [
-				$this->getDateString($l10n, $dtstartDt),
-				$this->getDateString($l10n, $dtendDt),
-			]);
-		}
-
-		$startTimezone = $endTimezone = null;
-		if (!$vevent->DTSTART->isFloating()) {
-			$startTimezone = $vevent->DTSTART->getDateTime()->getTimezone()->getName();
-			$endTimezone = $this->getDTEndFromEvent($vevent)->getDateTime()->getTimezone()->getName();
-		}
-
-		$localeStart = implode(', ', [
-			$this->getWeekDayName($l10n, $dtstartDt),
-			$this->getDateTimeString($l10n, $dtstartDt)
-		]);
-
-		// always show full date with timezone if timezones are different
-		if ($startTimezone !== $endTimezone) {
-			$localeEnd = implode(', ', [
-				$this->getWeekDayName($l10n, $dtendDt),
-				$this->getDateTimeString($l10n, $dtendDt)
-			]);
-
-			return $localeStart
-				. ' (' . $startTimezone . ') '
-				. ' - '
-				. $localeEnd
-				. ' (' . $endTimezone . ')';
-		}
-
-		// Show only the time if the day is the same
-		$localeEnd = $this->isDayEqual($dtstartDt, $dtendDt)
-			? $this->getTimeString($l10n, $dtendDt)
-			: implode(', ', [
-				$this->getWeekDayName($l10n, $dtendDt),
-				$this->getDateTimeString($l10n, $dtendDt)
-			]);
-
-		return $localeStart
-			. ' - '
-			. $localeEnd
-			. ' (' . $startTimezone . ')';
-	}
-
-	/**
-	 * @param DateTime $dtStart
-	 * @param DateTime $dtEnd
-	 * @return bool
-	 */
-	private function isDayEqual(DateTime $dtStart,
-								DateTime $dtEnd):bool {
-		return $dtStart->format('Y-m-d') === $dtEnd->format('Y-m-d');
-	}
-
-	/**
-	 * @param IL10N $l10n
-	 * @param DateTime $dt
-	 * @return string
-	 */
-	private function getWeekDayName(IL10N $l10n, DateTime $dt):string {
-		return $l10n->l('weekdayName', $dt, ['width' => 'abbreviated']);
-	}
-
-	/**
-	 * @param IL10N $l10n
-	 * @param DateTime $dt
-	 * @return string
-	 */
-	private function getDateString(IL10N $l10n, DateTime $dt):string {
-		return $l10n->l('date', $dt, ['width' => 'medium']);
-	}
-
-	/**
-	 * @param IL10N $l10n
-	 * @param DateTime $dt
-	 * @return string
-	 */
-	private function getDateTimeString(IL10N $l10n, DateTime $dt):string {
-		return $l10n->l('datetime', $dt, ['width' => 'medium|short']);
-	}
-
-	/**
-	 * @param IL10N $l10n
-	 * @param DateTime $dt
-	 * @return string
-	 */
-	private function getTimeString(IL10N $l10n, DateTime $dt):string {
-		return $l10n->l('time', $dt, ['width' => 'short']);
-	}
-
-	/**
-	 * @param VEvent $vevent
-	 * @param IL10N $l10n
-	 * @return string
-	 */
-	private function getTitleFromVEvent(VEvent $vevent, IL10N $l10n):string {
-		if (isset($vevent->SUMMARY)) {
-			return (string)$vevent->SUMMARY;
-		}
-
-		return $l10n->t('Untitled event');
-	}
+    /** @var string */
+    public const NOTIFICATION_TYPE = 'EMAIL';
+
+    /** @var IMailer */
+    private $mailer;
+
+    /**
+     * @param IConfig $config
+     * @param IMailer $mailer
+     * @param ILogger $logger
+     * @param L10NFactory $l10nFactory
+     * @param IUrlGenerator $urlGenerator
+     */
+    public function __construct(IConfig $config,
+                                IMailer $mailer,
+                                ILogger $logger,
+                                L10NFactory $l10nFactory,
+                                IURLGenerator $urlGenerator) {
+        parent::__construct($logger, $l10nFactory, $urlGenerator, $config);
+        $this->mailer = $mailer;
+    }
+
+    /**
+     * Send out notification via email
+     *
+     * @param VEvent $vevent
+     * @param string $calendarDisplayName
+     * @param array $users
+     * @throws \Exception
+     */
+    public function send(VEvent $vevent,
+                            string $calendarDisplayName,
+                            array $users=[]):void {
+        $fallbackLanguage = $this->getFallbackLanguage();
+
+        $emailAddressesOfSharees = $this->getEMailAddressesOfAllUsersWithWriteAccessToCalendar($users);
+        $emailAddressesOfAttendees = $this->getAllEMailAddressesFromEvent($vevent);
+
+        // Quote from php.net:
+        // If the input arrays have the same string keys, then the later value for that key will overwrite the previous one.
+        // => if there are duplicate email addresses, it will always take the system value
+        $emailAddresses = array_merge(
+            $emailAddressesOfAttendees,
+            $emailAddressesOfSharees
+        );
+
+        $sortedByLanguage = $this->sortEMailAddressesByLanguage($emailAddresses, $fallbackLanguage);
+        $organizer = $this->getOrganizerEMailAndNameFromEvent($vevent);
+
+        foreach ($sortedByLanguage as $lang => $emailAddresses) {
+            if (!$this->hasL10NForLang($lang)) {
+                $lang = $fallbackLanguage;
+            }
+            $l10n = $this->getL10NForLang($lang);
+            $fromEMail = \OCP\Util::getDefaultEmailAddress('reminders-noreply');
+
+            $template = $this->mailer->createEMailTemplate('dav.calendarReminder');
+            $template->addHeader();
+            $this->addSubjectAndHeading($template, $l10n, $vevent);
+            $this->addBulletList($template, $l10n, $calendarDisplayName, $vevent);
+            $template->addFooter();
+
+            foreach ($emailAddresses as $emailAddress) {
+                $message = $this->mailer->createMessage();
+                $message->setFrom([$fromEMail]);
+                if ($organizer) {
+                    $message->setReplyTo($organizer);
+                }
+                $message->setTo([$emailAddress]);
+                $message->useTemplate($template);
+
+                try {
+                    $failed = $this->mailer->send($message);
+                    if ($failed) {
+                        $this->logger->error('Unable to deliver message to {failed}', ['app' => 'dav', 'failed' => implode(', ', $failed)]);
+                    }
+                } catch (\Exception $ex) {
+                    $this->logger->logException($ex, ['app' => 'dav']);
+                }
+            }
+        }
+    }
+
+    /**
+     * @param IEMailTemplate $template
+     * @param IL10N $l10n
+     * @param VEvent $vevent
+     */
+    private function addSubjectAndHeading(IEMailTemplate $template, IL10N $l10n, VEvent $vevent):void {
+        $template->setSubject('Notification: ' . $this->getTitleFromVEvent($vevent, $l10n));
+        $template->addHeading($this->getTitleFromVEvent($vevent, $l10n));
+    }
+
+    /**
+     * @param IEMailTemplate $template
+     * @param IL10N $l10n
+     * @param string $calendarDisplayName
+     * @param array $eventData
+     */
+    private function addBulletList(IEMailTemplate $template,
+                                    IL10N $l10n,
+                                    string $calendarDisplayName,
+                                    VEvent $vevent):void {
+        $template->addBodyListItem($calendarDisplayName, $l10n->t('Calendar:'),
+            $this->getAbsoluteImagePath('actions/info.svg'));
+
+        $template->addBodyListItem($this->generateDateString($l10n, $vevent), $l10n->t('Date:'),
+            $this->getAbsoluteImagePath('places/calendar.svg'));
+
+        if (isset($vevent->LOCATION)) {
+            $template->addBodyListItem((string) $vevent->LOCATION, $l10n->t('Where:'),
+                $this->getAbsoluteImagePath('actions/address.svg'));
+        }
+        if (isset($vevent->DESCRIPTION)) {
+            $template->addBodyListItem((string) $vevent->DESCRIPTION, $l10n->t('Description:'),
+                $this->getAbsoluteImagePath('actions/more.svg'));
+        }
+    }
+
+    /**
+     * @param string $path
+     * @return string
+     */
+    private function getAbsoluteImagePath(string $path):string {
+        return $this->urlGenerator->getAbsoluteURL(
+            $this->urlGenerator->imagePath('core', $path)
+        );
+    }
+
+    /**
+     * @param VEvent $vevent
+     * @return array|null
+     */
+    private function getOrganizerEMailAndNameFromEvent(VEvent $vevent):?array {
+        if (!$vevent->ORGANIZER) {
+            return null;
+        }
+
+        $organizer = $vevent->ORGANIZER;
+        if (strcasecmp($organizer->getValue(), 'mailto:') !== 0) {
+            return null;
+        }
+
+        $organizerEMail = substr($organizer->getValue(), 7);
+
+        $name = $organizer->offsetGet('CN');
+        if ($name instanceof Parameter) {
+            return [$organizerEMail => $name];
+        }
+
+        return [$organizerEMail];
+    }
+
+    /**
+     * @param array $emails
+     * @param string $defaultLanguage
+     * @return array
+     */
+    private function sortEMailAddressesByLanguage(array $emails,
+                                                    string $defaultLanguage):array {
+        $sortedByLanguage = [];
+
+        foreach ($emails as $emailAddress => $parameters) {
+            if (isset($parameters['LANG'])) {
+                $lang = $parameters['LANG'];
+            } else {
+                $lang = $defaultLanguage;
+            }
+
+            if (!isset($sortedByLanguage[$lang])) {
+                $sortedByLanguage[$lang] = [];
+            }
+
+            $sortedByLanguage[$lang][] = $emailAddress;
+        }
+
+        return $sortedByLanguage;
+    }
+
+    /**
+     * @param VEvent $vevent
+     * @return array
+     */
+    private function getAllEMailAddressesFromEvent(VEvent $vevent):array {
+        $emailAddresses = [];
+
+        if (isset($vevent->ATTENDEE)) {
+            foreach ($vevent->ATTENDEE as $attendee) {
+                if (!($attendee instanceof VObject\Property)) {
+                    continue;
+                }
+
+                $cuType = $this->getCUTypeOfAttendee($attendee);
+                if (\in_array($cuType, ['RESOURCE', 'ROOM', 'UNKNOWN'])) {
+                    // Don't send emails to things
+                    continue;
+                }
+
+                $partstat = $this->getPartstatOfAttendee($attendee);
+                if ($partstat === 'DECLINED') {
+                    // Don't send out emails to people who declined
+                    continue;
+                }
+                if ($partstat === 'DELEGATED') {
+                    $delegates = $attendee->offsetGet('DELEGATED-TO');
+                    if (!($delegates instanceof VObject\Parameter)) {
+                        continue;
+                    }
+
+                    $emailAddressesOfDelegates = $delegates->getParts();
+                    foreach ($emailAddressesOfDelegates as $addressesOfDelegate) {
+                        if (strcasecmp($addressesOfDelegate, 'mailto:') === 0) {
+                            $emailAddresses[substr($addressesOfDelegate, 7)] = [];
+                        }
+                    }
+
+                    continue;
+                }
+
+                $emailAddressOfAttendee = $this->getEMailAddressOfAttendee($attendee);
+                if ($emailAddressOfAttendee !== null) {
+                    $properties = [];
+
+                    $langProp = $attendee->offsetGet('LANG');
+                    if ($langProp instanceof VObject\Parameter) {
+                        $properties['LANG'] = $langProp->getValue();
+                    }
+
+                    $emailAddresses[$emailAddressOfAttendee] = $properties;
+                }
+            }
+        }
+
+        if (isset($vevent->ORGANIZER) && $this->hasAttendeeMailURI($vevent->ORGANIZER)) {
+            $emailAddresses[$this->getEMailAddressOfAttendee($vevent->ORGANIZER)] = [];
+        }
+
+        return $emailAddresses;
+    }
+
+
+
+    /**
+     * @param VObject\Property $attendee
+     * @return string
+     */
+    private function getCUTypeOfAttendee(VObject\Property $attendee):string {
+        $cuType = $attendee->offsetGet('CUTYPE');
+        if ($cuType instanceof VObject\Parameter) {
+            return strtoupper($cuType->getValue());
+        }
+
+        return 'INDIVIDUAL';
+    }
+
+    /**
+     * @param VObject\Property $attendee
+     * @return string
+     */
+    private function getPartstatOfAttendee(VObject\Property $attendee):string {
+        $partstat = $attendee->offsetGet('PARTSTAT');
+        if ($partstat instanceof VObject\Parameter) {
+            return strtoupper($partstat->getValue());
+        }
+
+        return 'NEEDS-ACTION';
+    }
+
+    /**
+     * @param VObject\Property $attendee
+     * @return bool
+     */
+    private function hasAttendeeMailURI(VObject\Property $attendee):bool {
+        return stripos($attendee->getValue(), 'mailto:') === 0;
+    }
+
+    /**
+     * @param VObject\Property $attendee
+     * @return string|null
+     */
+    private function getEMailAddressOfAttendee(VObject\Property $attendee):?string {
+        if (!$this->hasAttendeeMailURI($attendee)) {
+            return null;
+        }
+
+        return substr($attendee->getValue(), 7);
+    }
+
+    /**
+     * @param array $users
+     * @return array
+     */
+    private function getEMailAddressesOfAllUsersWithWriteAccessToCalendar(array $users):array {
+        $emailAddresses = [];
+
+        foreach ($users as $user) {
+            $emailAddress = $user->getEMailAddress();
+            if ($emailAddress) {
+                $lang = $this->l10nFactory->getUserLanguage($user);
+                if ($lang) {
+                    $emailAddresses[$emailAddress] = [
+                        'LANG' => $lang,
+                    ];
+                } else {
+                    $emailAddresses[$emailAddress] = [];
+                }
+            }
+        }
+
+        return $emailAddresses;
+    }
+
+    /**
+     * @param IL10N $l10n
+     * @param VEvent $vevent
+     * @return string
+     * @throws \Exception
+     */
+    private function generateDateString(IL10N $l10n, VEvent $vevent):string {
+        $isAllDay = $vevent->DTSTART instanceof Property\ICalendar\Date;
+
+        /** @var Property\ICalendar\Date | Property\ICalendar\DateTime $dtstart */
+        /** @var Property\ICalendar\Date | Property\ICalendar\DateTime $dtend */
+        /** @var \DateTimeImmutable $dtstartDt */
+        $dtstartDt = $vevent->DTSTART->getDateTime();
+        /** @var \DateTimeImmutable $dtendDt */
+        $dtendDt = $this->getDTEndFromEvent($vevent)->getDateTime();
+
+        $diff = $dtstartDt->diff($dtendDt);
+
+        $dtstartDt = new \DateTime($dtstartDt->format(\DateTime::ATOM));
+        $dtendDt = new \DateTime($dtendDt->format(\DateTime::ATOM));
+
+        if ($isAllDay) {
+            // One day event
+            if ($diff->days === 1) {
+                return $this->getDateString($l10n, $dtstartDt);
+            }
+
+            return implode(' - ', [
+                $this->getDateString($l10n, $dtstartDt),
+                $this->getDateString($l10n, $dtendDt),
+            ]);
+        }
+
+        $startTimezone = $endTimezone = null;
+        if (!$vevent->DTSTART->isFloating()) {
+            $startTimezone = $vevent->DTSTART->getDateTime()->getTimezone()->getName();
+            $endTimezone = $this->getDTEndFromEvent($vevent)->getDateTime()->getTimezone()->getName();
+        }
+
+        $localeStart = implode(', ', [
+            $this->getWeekDayName($l10n, $dtstartDt),
+            $this->getDateTimeString($l10n, $dtstartDt)
+        ]);
+
+        // always show full date with timezone if timezones are different
+        if ($startTimezone !== $endTimezone) {
+            $localeEnd = implode(', ', [
+                $this->getWeekDayName($l10n, $dtendDt),
+                $this->getDateTimeString($l10n, $dtendDt)
+            ]);
+
+            return $localeStart
+                . ' (' . $startTimezone . ') '
+                . ' - '
+                . $localeEnd
+                . ' (' . $endTimezone . ')';
+        }
+
+        // Show only the time if the day is the same
+        $localeEnd = $this->isDayEqual($dtstartDt, $dtendDt)
+            ? $this->getTimeString($l10n, $dtendDt)
+            : implode(', ', [
+                $this->getWeekDayName($l10n, $dtendDt),
+                $this->getDateTimeString($l10n, $dtendDt)
+            ]);
+
+        return $localeStart
+            . ' - '
+            . $localeEnd
+            . ' (' . $startTimezone . ')';
+    }
+
+    /**
+     * @param DateTime $dtStart
+     * @param DateTime $dtEnd
+     * @return bool
+     */
+    private function isDayEqual(DateTime $dtStart,
+                                DateTime $dtEnd):bool {
+        return $dtStart->format('Y-m-d') === $dtEnd->format('Y-m-d');
+    }
+
+    /**
+     * @param IL10N $l10n
+     * @param DateTime $dt
+     * @return string
+     */
+    private function getWeekDayName(IL10N $l10n, DateTime $dt):string {
+        return $l10n->l('weekdayName', $dt, ['width' => 'abbreviated']);
+    }
+
+    /**
+     * @param IL10N $l10n
+     * @param DateTime $dt
+     * @return string
+     */
+    private function getDateString(IL10N $l10n, DateTime $dt):string {
+        return $l10n->l('date', $dt, ['width' => 'medium']);
+    }
+
+    /**
+     * @param IL10N $l10n
+     * @param DateTime $dt
+     * @return string
+     */
+    private function getDateTimeString(IL10N $l10n, DateTime $dt):string {
+        return $l10n->l('datetime', $dt, ['width' => 'medium|short']);
+    }
+
+    /**
+     * @param IL10N $l10n
+     * @param DateTime $dt
+     * @return string
+     */
+    private function getTimeString(IL10N $l10n, DateTime $dt):string {
+        return $l10n->l('time', $dt, ['width' => 'short']);
+    }
+
+    /**
+     * @param VEvent $vevent
+     * @param IL10N $l10n
+     * @return string
+     */
+    private function getTitleFromVEvent(VEvent $vevent, IL10N $l10n):string {
+        if (isset($vevent->SUMMARY)) {
+            return (string)$vevent->SUMMARY;
+        }
+
+        return $l10n->t('Untitled event');
+    }
 }

lib/private/Security/Bruteforce/Throttler.php

Indentation +298 added lines, -298 removed lines

@@ -54,302 +54,302 @@
  * @package OC\Security\Bruteforce
  */
 class Throttler {
-	public const LOGIN_ACTION = 'login';
-	public const MAX_DELAY = 25;
-	public const MAX_DELAY_MS = 25000; // in milliseconds
-	public const MAX_ATTEMPTS = 10;
-
-	/** @var IDBConnection */
-	private $db;
-	/** @var ITimeFactory */
-	private $timeFactory;
-	/** @var ILogger */
-	private $logger;
-	/** @var IConfig */
-	private $config;
-
-	/**
-	 * @param IDBConnection $db
-	 * @param ITimeFactory $timeFactory
-	 * @param ILogger $logger
-	 * @param IConfig $config
-	 */
-	public function __construct(IDBConnection $db,
-								ITimeFactory $timeFactory,
-								ILogger $logger,
-								IConfig $config) {
-		$this->db = $db;
-		$this->timeFactory = $timeFactory;
-		$this->logger = $logger;
-		$this->config = $config;
-	}
-
-	/**
-	 * Convert a number of seconds into the appropriate DateInterval
-	 *
-	 * @param int $expire
-	 * @return \DateInterval
-	 */
-	private function getCutoff(int $expire): \DateInterval {
-		$d1 = new \DateTime();
-		$d2 = clone $d1;
-		$d2->sub(new \DateInterval('PT' . $expire . 'S'));
-		return $d2->diff($d1);
-	}
-
-	/**
-	 *  Calculate the cut off timestamp
-	 *
-	 * @param float $maxAgeHours
-	 * @return int
-	 */
-	private function getCutoffTimestamp(float $maxAgeHours = 12.0): int {
-		return (new \DateTime())
-			->sub($this->getCutoff((int) ($maxAgeHours * 3600)))
-			->getTimestamp();
-	}
-
-	/**
-	 * Register a failed attempt to bruteforce a security control
-	 *
-	 * @param string $action
-	 * @param string $ip
-	 * @param array $metadata Optional metadata logged to the database
-	 */
-	public function registerAttempt(string $action,
-									string $ip,
-									array $metadata = []): void {
-		// No need to log if the bruteforce protection is disabled
-		if ($this->config->getSystemValue('auth.bruteforce.protection.enabled', true) === false) {
-			return;
-		}
-
-		$ipAddress = new IpAddress($ip);
-		$values = [
-			'action' => $action,
-			'occurred' => $this->timeFactory->getTime(),
-			'ip' => (string)$ipAddress,
-			'subnet' => $ipAddress->getSubnet(),
-			'metadata' => json_encode($metadata),
-		];
-
-		$this->logger->notice(
-			sprintf(
-				'Bruteforce attempt from "%s" detected for action "%s".',
-				$ip,
-				$action
-			),
-			[
-				'app' => 'core',
-			]
-		);
-
-		$qb = $this->db->getQueryBuilder();
-		$qb->insert('bruteforce_attempts');
-		foreach ($values as $column => $value) {
-			$qb->setValue($column, $qb->createNamedParameter($value));
-		}
-		$qb->execute();
-	}
-
-	/**
-	 * Check if the IP is whitelisted
-	 *
-	 * @param string $ip
-	 * @return bool
-	 */
-	private function isIPWhitelisted(string $ip): bool {
-		if ($this->config->getSystemValue('auth.bruteforce.protection.enabled', true) === false) {
-			return true;
-		}
-
-		$keys = $this->config->getAppKeys('bruteForce');
-		$keys = array_filter($keys, function ($key) {
-			return 0 === strpos($key, 'whitelist_');
-		});
-
-		if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
-			$type = 4;
-		} elseif (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
-			$type = 6;
-		} else {
-			return false;
-		}
-
-		$ip = inet_pton($ip);
-
-		foreach ($keys as $key) {
-			$cidr = $this->config->getAppValue('bruteForce', $key, null);
-
-			$cx = explode('/', $cidr);
-			$addr = $cx[0];
-			$mask = (int)$cx[1];
-
-			// Do not compare ipv4 to ipv6
-			if (($type === 4 && !filter_var($addr, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) ||
-				($type === 6 && !filter_var($addr, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6))) {
-				continue;
-			}
-
-			$addr = inet_pton($addr);
-
-			$valid = true;
-			for ($i = 0; $i < $mask; $i++) {
-				$part = ord($addr[(int)($i/8)]);
-				$orig = ord($ip[(int)($i/8)]);
-
-				$bitmask = 1 << (7 - ($i % 8));
-
-				$part = $part & $bitmask;
-				$orig = $orig & $bitmask;
-
-				if ($part !== $orig) {
-					$valid = false;
-					break;
-				}
-			}
-
-			if ($valid === true) {
-				return true;
-			}
-		}
-
-		return false;
-	}
-
-	/**
-	 * Get the throttling delay (in milliseconds)
-	 *
-	 * @param string $ip
-	 * @param string $action optionally filter by action
-	 * @param float $maxAgeHours
-	 * @return int
-	 */
-	public function getAttempts(string $ip, string $action = '', float $maxAgeHours = 12): int {
-		if ($ip === '') {
-			return 0;
-		}
-
-		$ipAddress = new IpAddress($ip);
-		if ($this->isIPWhitelisted((string)$ipAddress)) {
-			return 0;
-		}
-
-		$cutoffTime = $this->getCutoffTimestamp($maxAgeHours);
-
-		$qb = $this->db->getQueryBuilder();
-		$qb->select($qb->func()->count('*', 'attempts'))
-			->from('bruteforce_attempts')
-			->where($qb->expr()->gt('occurred', $qb->createNamedParameter($cutoffTime)))
-			->andWhere($qb->expr()->eq('subnet', $qb->createNamedParameter($ipAddress->getSubnet())));
-
-		if ($action !== '') {
-			$qb->andWhere($qb->expr()->eq('action', $qb->createNamedParameter($action)));
-		}
-
-		$result = $qb->execute();
-		$row = $result->fetch();
-		$result->closeCursor();
-
-		return (int) $row['attempts'];
-	}
-
-	/**
-	 * Get the throttling delay (in milliseconds)
-	 *
-	 * @param string $ip
-	 * @param string $action optionally filter by action
-	 * @return int
-	 */
-	public function getDelay(string $ip, string $action = ''): int {
-		$attempts = $this->getAttempts($ip, $action);
-		if ($attempts === 0) {
-			return 0;
-		}
-
-		$firstDelay = 0.1;
-		if ($attempts > self::MAX_ATTEMPTS) {
-			// Don't ever overflow. Just assume the maxDelay time:s
-			return self::MAX_DELAY_MS;
-		}
-
-		$delay = $firstDelay * 2**$attempts;
-		if ($delay > self::MAX_DELAY) {
-			return self::MAX_DELAY_MS;
-		}
-		return (int) \ceil($delay * 1000);
-	}
-
-	/**
-	 * Reset the throttling delay for an IP address, action and metadata
-	 *
-	 * @param string $ip
-	 * @param string $action
-	 * @param array $metadata
-	 */
-	public function resetDelay(string $ip, string $action, array $metadata): void {
-		$ipAddress = new IpAddress($ip);
-		if ($this->isIPWhitelisted((string)$ipAddress)) {
-			return;
-		}
-
-		$cutoffTime = $this->getCutoffTimestamp();
-
-		$qb = $this->db->getQueryBuilder();
-		$qb->delete('bruteforce_attempts')
-			->where($qb->expr()->gt('occurred', $qb->createNamedParameter($cutoffTime)))
-			->andWhere($qb->expr()->eq('subnet', $qb->createNamedParameter($ipAddress->getSubnet())))
-			->andWhere($qb->expr()->eq('action', $qb->createNamedParameter($action)))
-			->andWhere($qb->expr()->eq('metadata', $qb->createNamedParameter(json_encode($metadata))));
-
-		$qb->execute();
-	}
-
-	/**
-	 * Reset the throttling delay for an IP address
-	 *
-	 * @param string $ip
-	 */
-	public function resetDelayForIP($ip) {
-		$cutoffTime = $this->getCutoffTimestamp();
-
-		$qb = $this->db->getQueryBuilder();
-		$qb->delete('bruteforce_attempts')
-			->where($qb->expr()->gt('occurred', $qb->createNamedParameter($cutoffTime)))
-			->andWhere($qb->expr()->eq('ip', $qb->createNamedParameter($ip)));
-
-		$qb->execute();
-	}
-
-	/**
-	 * Will sleep for the defined amount of time
-	 *
-	 * @param string $ip
-	 * @param string $action optionally filter by action
-	 * @return int the time spent sleeping
-	 */
-	public function sleepDelay(string $ip, string $action = ''): int {
-		$delay = $this->getDelay($ip, $action);
-		usleep($delay * 1000);
-		return $delay;
-	}
-
-	/**
-	 * Will sleep for the defined amount of time unless maximum was reached in the last 30 minutes
-	 * In this case a "429 Too Many Request" exception is thrown
-	 *
-	 * @param string $ip
-	 * @param string $action optionally filter by action
-	 * @return int the time spent sleeping
-	 * @throws MaxDelayReached when reached the maximum
-	 */
-	public function sleepDelayOrThrowOnMax(string $ip, string $action = ''): int {
-		$delay = $this->getDelay($ip, $action);
-		if (($delay === self::MAX_DELAY_MS) && $this->getAttempts($ip, $action, 0.5) > self::MAX_ATTEMPTS) {
-			// If the ip made too many attempts within the last 30 mins we don't execute anymore
-			throw new MaxDelayReached('Reached maximum delay');
-		}
-		usleep($delay * 1000);
-		return $delay;
-	}
+    public const LOGIN_ACTION = 'login';
+    public const MAX_DELAY = 25;
+    public const MAX_DELAY_MS = 25000; // in milliseconds
+    public const MAX_ATTEMPTS = 10;
+
+    /** @var IDBConnection */
+    private $db;
+    /** @var ITimeFactory */
+    private $timeFactory;
+    /** @var ILogger */
+    private $logger;
+    /** @var IConfig */
+    private $config;
+
+    /**
+     * @param IDBConnection $db
+     * @param ITimeFactory $timeFactory
+     * @param ILogger $logger
+     * @param IConfig $config
+     */
+    public function __construct(IDBConnection $db,
+                                ITimeFactory $timeFactory,
+                                ILogger $logger,
+                                IConfig $config) {
+        $this->db = $db;
+        $this->timeFactory = $timeFactory;
+        $this->logger = $logger;
+        $this->config = $config;
+    }
+
+    /**
+     * Convert a number of seconds into the appropriate DateInterval
+     *
+     * @param int $expire
+     * @return \DateInterval
+     */
+    private function getCutoff(int $expire): \DateInterval {
+        $d1 = new \DateTime();
+        $d2 = clone $d1;
+        $d2->sub(new \DateInterval('PT' . $expire . 'S'));
+        return $d2->diff($d1);
+    }
+
+    /**
+     *  Calculate the cut off timestamp
+     *
+     * @param float $maxAgeHours
+     * @return int
+     */
+    private function getCutoffTimestamp(float $maxAgeHours = 12.0): int {
+        return (new \DateTime())
+            ->sub($this->getCutoff((int) ($maxAgeHours * 3600)))
+            ->getTimestamp();
+    }
+
+    /**
+     * Register a failed attempt to bruteforce a security control
+     *
+     * @param string $action
+     * @param string $ip
+     * @param array $metadata Optional metadata logged to the database
+     */
+    public function registerAttempt(string $action,
+                                    string $ip,
+                                    array $metadata = []): void {
+        // No need to log if the bruteforce protection is disabled
+        if ($this->config->getSystemValue('auth.bruteforce.protection.enabled', true) === false) {
+            return;
+        }
+
+        $ipAddress = new IpAddress($ip);
+        $values = [
+            'action' => $action,
+            'occurred' => $this->timeFactory->getTime(),
+            'ip' => (string)$ipAddress,
+            'subnet' => $ipAddress->getSubnet(),
+            'metadata' => json_encode($metadata),
+        ];
+
+        $this->logger->notice(
+            sprintf(
+                'Bruteforce attempt from "%s" detected for action "%s".',
+                $ip,
+                $action
+            ),
+            [
+                'app' => 'core',
+            ]
+        );
+
+        $qb = $this->db->getQueryBuilder();
+        $qb->insert('bruteforce_attempts');
+        foreach ($values as $column => $value) {
+            $qb->setValue($column, $qb->createNamedParameter($value));
+        }
+        $qb->execute();
+    }
+
+    /**
+     * Check if the IP is whitelisted
+     *
+     * @param string $ip
+     * @return bool
+     */
+    private function isIPWhitelisted(string $ip): bool {
+        if ($this->config->getSystemValue('auth.bruteforce.protection.enabled', true) === false) {
+            return true;
+        }
+
+        $keys = $this->config->getAppKeys('bruteForce');
+        $keys = array_filter($keys, function ($key) {
+            return 0 === strpos($key, 'whitelist_');
+        });
+
+        if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
+            $type = 4;
+        } elseif (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
+            $type = 6;
+        } else {
+            return false;
+        }
+
+        $ip = inet_pton($ip);
+
+        foreach ($keys as $key) {
+            $cidr = $this->config->getAppValue('bruteForce', $key, null);
+
+            $cx = explode('/', $cidr);
+            $addr = $cx[0];
+            $mask = (int)$cx[1];
+
+            // Do not compare ipv4 to ipv6
+            if (($type === 4 && !filter_var($addr, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) ||
+                ($type === 6 && !filter_var($addr, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6))) {
+                continue;
+            }
+
+            $addr = inet_pton($addr);
+
+            $valid = true;
+            for ($i = 0; $i < $mask; $i++) {
+                $part = ord($addr[(int)($i/8)]);
+                $orig = ord($ip[(int)($i/8)]);
+
+                $bitmask = 1 << (7 - ($i % 8));
+
+                $part = $part & $bitmask;
+                $orig = $orig & $bitmask;
+
+                if ($part !== $orig) {
+                    $valid = false;
+                    break;
+                }
+            }
+
+            if ($valid === true) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Get the throttling delay (in milliseconds)
+     *
+     * @param string $ip
+     * @param string $action optionally filter by action
+     * @param float $maxAgeHours
+     * @return int
+     */
+    public function getAttempts(string $ip, string $action = '', float $maxAgeHours = 12): int {
+        if ($ip === '') {
+            return 0;
+        }
+
+        $ipAddress = new IpAddress($ip);
+        if ($this->isIPWhitelisted((string)$ipAddress)) {
+            return 0;
+        }
+
+        $cutoffTime = $this->getCutoffTimestamp($maxAgeHours);
+
+        $qb = $this->db->getQueryBuilder();
+        $qb->select($qb->func()->count('*', 'attempts'))
+            ->from('bruteforce_attempts')
+            ->where($qb->expr()->gt('occurred', $qb->createNamedParameter($cutoffTime)))
+            ->andWhere($qb->expr()->eq('subnet', $qb->createNamedParameter($ipAddress->getSubnet())));
+
+        if ($action !== '') {
+            $qb->andWhere($qb->expr()->eq('action', $qb->createNamedParameter($action)));
+        }
+
+        $result = $qb->execute();
+        $row = $result->fetch();
+        $result->closeCursor();
+
+        return (int) $row['attempts'];
+    }
+
+    /**
+     * Get the throttling delay (in milliseconds)
+     *
+     * @param string $ip
+     * @param string $action optionally filter by action
+     * @return int
+     */
+    public function getDelay(string $ip, string $action = ''): int {
+        $attempts = $this->getAttempts($ip, $action);
+        if ($attempts === 0) {
+            return 0;
+        }
+
+        $firstDelay = 0.1;
+        if ($attempts > self::MAX_ATTEMPTS) {
+            // Don't ever overflow. Just assume the maxDelay time:s
+            return self::MAX_DELAY_MS;
+        }
+
+        $delay = $firstDelay * 2**$attempts;
+        if ($delay > self::MAX_DELAY) {
+            return self::MAX_DELAY_MS;
+        }
+        return (int) \ceil($delay * 1000);
+    }
+
+    /**
+     * Reset the throttling delay for an IP address, action and metadata
+     *
+     * @param string $ip
+     * @param string $action
+     * @param array $metadata
+     */
+    public function resetDelay(string $ip, string $action, array $metadata): void {
+        $ipAddress = new IpAddress($ip);
+        if ($this->isIPWhitelisted((string)$ipAddress)) {
+            return;
+        }
+
+        $cutoffTime = $this->getCutoffTimestamp();
+
+        $qb = $this->db->getQueryBuilder();
+        $qb->delete('bruteforce_attempts')
+            ->where($qb->expr()->gt('occurred', $qb->createNamedParameter($cutoffTime)))
+            ->andWhere($qb->expr()->eq('subnet', $qb->createNamedParameter($ipAddress->getSubnet())))
+            ->andWhere($qb->expr()->eq('action', $qb->createNamedParameter($action)))
+            ->andWhere($qb->expr()->eq('metadata', $qb->createNamedParameter(json_encode($metadata))));
+
+        $qb->execute();
+    }
+
+    /**
+     * Reset the throttling delay for an IP address
+     *
+     * @param string $ip
+     */
+    public function resetDelayForIP($ip) {
+        $cutoffTime = $this->getCutoffTimestamp();
+
+        $qb = $this->db->getQueryBuilder();
+        $qb->delete('bruteforce_attempts')
+            ->where($qb->expr()->gt('occurred', $qb->createNamedParameter($cutoffTime)))
+            ->andWhere($qb->expr()->eq('ip', $qb->createNamedParameter($ip)));
+
+        $qb->execute();
+    }
+
+    /**
+     * Will sleep for the defined amount of time
+     *
+     * @param string $ip
+     * @param string $action optionally filter by action
+     * @return int the time spent sleeping
+     */
+    public function sleepDelay(string $ip, string $action = ''): int {
+        $delay = $this->getDelay($ip, $action);
+        usleep($delay * 1000);
+        return $delay;
+    }
+
+    /**
+     * Will sleep for the defined amount of time unless maximum was reached in the last 30 minutes
+     * In this case a "429 Too Many Request" exception is thrown
+     *
+     * @param string $ip
+     * @param string $action optionally filter by action
+     * @return int the time spent sleeping
+     * @throws MaxDelayReached when reached the maximum
+     */
+    public function sleepDelayOrThrowOnMax(string $ip, string $action = ''): int {
+        $delay = $this->getDelay($ip, $action);
+        if (($delay === self::MAX_DELAY_MS) && $this->getAttempts($ip, $action, 0.5) > self::MAX_ATTEMPTS) {
+            // If the ip made too many attempts within the last 30 mins we don't execute anymore
+            throw new MaxDelayReached('Reached maximum delay');
+        }
+        usleep($delay * 1000);
+        return $delay;
+    }
 }

lib/private/BackgroundJob/JobList.php

Indentation +290 added lines, -290 removed lines

@@ -42,294 +42,294 @@
 
 class JobList implements IJobList {
 
-	/** @var IDBConnection */
-	protected $connection;
-
-	/**@var IConfig */
-	protected $config;
-
-	/**@var ITimeFactory */
-	protected $timeFactory;
-
-	/**
-	 * @param IDBConnection $connection
-	 * @param IConfig $config
-	 * @param ITimeFactory $timeFactory
-	 */
-	public function __construct(IDBConnection $connection, IConfig $config, ITimeFactory $timeFactory) {
-		$this->connection = $connection;
-		$this->config = $config;
-		$this->timeFactory = $timeFactory;
-	}
-
-	/**
-	 * @param IJob|string $job
-	 * @param mixed $argument
-	 */
-	public function add($job, $argument = null) {
-		if (!$this->has($job, $argument)) {
-			if ($job instanceof IJob) {
-				$class = get_class($job);
-			} else {
-				$class = $job;
-			}
-
-			$argument = json_encode($argument);
-			if (strlen($argument) > 4000) {
-				throw new \InvalidArgumentException('Background job arguments can\'t exceed 4000 characters (json encoded)');
-			}
-
-			$query = $this->connection->getQueryBuilder();
-			$query->insert('jobs')
-				->values([
-					'class' => $query->createNamedParameter($class),
-					'argument' => $query->createNamedParameter($argument),
-					'last_run' => $query->createNamedParameter(0, IQueryBuilder::PARAM_INT),
-					'last_checked' => $query->createNamedParameter($this->timeFactory->getTime(), IQueryBuilder::PARAM_INT),
-				]);
-			$query->execute();
-		}
-	}
-
-	/**
-	 * @param IJob|string $job
-	 * @param mixed $argument
-	 */
-	public function remove($job, $argument = null) {
-		if ($job instanceof IJob) {
-			$class = get_class($job);
-		} else {
-			$class = $job;
-		}
-
-		$query = $this->connection->getQueryBuilder();
-		$query->delete('jobs')
-			->where($query->expr()->eq('class', $query->createNamedParameter($class)));
-		if (!is_null($argument)) {
-			$argument = json_encode($argument);
-			$query->andWhere($query->expr()->eq('argument', $query->createNamedParameter($argument)));
-		}
-		$query->execute();
-	}
-
-	/**
-	 * @param int $id
-	 */
-	protected function removeById($id) {
-		$query = $this->connection->getQueryBuilder();
-		$query->delete('jobs')
-			->where($query->expr()->eq('id', $query->createNamedParameter($id, IQueryBuilder::PARAM_INT)));
-		$query->execute();
-	}
-
-	/**
-	 * check if a job is in the list
-	 *
-	 * @param IJob|string $job
-	 * @param mixed $argument
-	 * @return bool
-	 */
-	public function has($job, $argument) {
-		if ($job instanceof IJob) {
-			$class = get_class($job);
-		} else {
-			$class = $job;
-		}
-		$argument = json_encode($argument);
-
-		$query = $this->connection->getQueryBuilder();
-		$query->select('id')
-			->from('jobs')
-			->where($query->expr()->eq('class', $query->createNamedParameter($class)))
-			->andWhere($query->expr()->eq('argument', $query->createNamedParameter($argument)))
-			->setMaxResults(1);
-
-		$result = $query->execute();
-		$row = $result->fetch();
-		$result->closeCursor();
-
-		return (bool) $row;
-	}
-
-	/**
-	 * get all jobs in the list
-	 *
-	 * @return IJob[]
-	 * @deprecated 9.0.0 - This method is dangerous since it can cause load and
-	 * memory problems when creating too many instances.
-	 */
-	public function getAll() {
-		$query = $this->connection->getQueryBuilder();
-		$query->select('*')
-			->from('jobs');
-		$result = $query->execute();
-
-		$jobs = [];
-		while ($row = $result->fetch()) {
-			$job = $this->buildJob($row);
-			if ($job) {
-				$jobs[] = $job;
-			}
-		}
-		$result->closeCursor();
-
-		return $jobs;
-	}
-
-	/**
-	 * get the next job in the list
-	 *
-	 * @return IJob|null
-	 */
-	public function getNext() {
-		$query = $this->connection->getQueryBuilder();
-		$query->select('*')
-			->from('jobs')
-			->where($query->expr()->lte('reserved_at', $query->createNamedParameter($this->timeFactory->getTime() - 12 * 3600, IQueryBuilder::PARAM_INT)))
-			->andWhere($query->expr()->lte('last_checked', $query->createNamedParameter($this->timeFactory->getTime(), IQueryBuilder::PARAM_INT)))
-			->orderBy('last_checked', 'ASC')
-			->setMaxResults(1);
-
-		$update = $this->connection->getQueryBuilder();
-		$update->update('jobs')
-			->set('reserved_at', $update->createNamedParameter($this->timeFactory->getTime()))
-			->set('last_checked', $update->createNamedParameter($this->timeFactory->getTime()))
-			->where($update->expr()->eq('id', $update->createParameter('jobid')))
-			->andWhere($update->expr()->eq('reserved_at', $update->createParameter('reserved_at')))
-			->andWhere($update->expr()->eq('last_checked', $update->createParameter('last_checked')));
-
-		$result = $query->execute();
-		$row = $result->fetch();
-		$result->closeCursor();
-
-		if ($row) {
-			$update->setParameter('jobid', $row['id']);
-			$update->setParameter('reserved_at', $row['reserved_at']);
-			$update->setParameter('last_checked', $row['last_checked']);
-			$count = $update->execute();
-
-			if ($count === 0) {
-				// Background job already executed elsewhere, try again.
-				return $this->getNext();
-			}
-			$job = $this->buildJob($row);
-
-			if ($job === null) {
-				// set the last_checked to 12h in the future to not check failing jobs all over again
-				$reset = $this->connection->getQueryBuilder();
-				$reset->update('jobs')
-					->set('reserved_at', $reset->expr()->literal(0, IQueryBuilder::PARAM_INT))
-					->set('last_checked', $reset->createNamedParameter($this->timeFactory->getTime() + 12 * 3600, IQueryBuilder::PARAM_INT))
-					->where($reset->expr()->eq('id', $reset->createNamedParameter($row['id'], IQueryBuilder::PARAM_INT)));
-				$reset->execute();
-
-				// Background job from disabled app, try again.
-				return $this->getNext();
-			}
-
-			return $job;
-		} else {
-			return null;
-		}
-	}
-
-	/**
-	 * @param int $id
-	 * @return IJob|null
-	 */
-	public function getById($id) {
-		$query = $this->connection->getQueryBuilder();
-		$query->select('*')
-			->from('jobs')
-			->where($query->expr()->eq('id', $query->createNamedParameter($id, IQueryBuilder::PARAM_INT)));
-		$result = $query->execute();
-		$row = $result->fetch();
-		$result->closeCursor();
-
-		if ($row) {
-			return $this->buildJob($row);
-		} else {
-			return null;
-		}
-	}
-
-	/**
-	 * get the job object from a row in the db
-	 *
-	 * @param array $row
-	 * @return IJob|null
-	 */
-	private function buildJob($row) {
-		try {
-			try {
-				// Try to load the job as a service
-				/** @var IJob $job */
-				$job = \OC::$server->query($row['class']);
-			} catch (QueryException $e) {
-				if (class_exists($row['class'])) {
-					$class = $row['class'];
-					$job = new $class();
-				} else {
-					// job from disabled app or old version of an app, no need to do anything
-					return null;
-				}
-			}
-
-			$job->setId((int) $row['id']);
-			$job->setLastRun((int) $row['last_run']);
-			$job->setArgument(json_decode($row['argument'], true));
-			return $job;
-		} catch (AutoloadNotAllowedException $e) {
-			// job is from a disabled app, ignore
-			return null;
-		}
-	}
-
-	/**
-	 * set the job that was last ran
-	 *
-	 * @param IJob $job
-	 */
-	public function setLastJob(IJob $job) {
-		$this->unlockJob($job);
-		$this->config->setAppValue('backgroundjob', 'lastjob', $job->getId());
-	}
-
-	/**
-	 * Remove the reservation for a job
-	 *
-	 * @param IJob $job
-	 */
-	public function unlockJob(IJob $job) {
-		$query = $this->connection->getQueryBuilder();
-		$query->update('jobs')
-			->set('reserved_at', $query->expr()->literal(0, IQueryBuilder::PARAM_INT))
-			->where($query->expr()->eq('id', $query->createNamedParameter($job->getId(), IQueryBuilder::PARAM_INT)));
-		$query->execute();
-	}
-
-	/**
-	 * set the lastRun of $job to now
-	 *
-	 * @param IJob $job
-	 */
-	public function setLastRun(IJob $job) {
-		$query = $this->connection->getQueryBuilder();
-		$query->update('jobs')
-			->set('last_run', $query->createNamedParameter(time(), IQueryBuilder::PARAM_INT))
-			->where($query->expr()->eq('id', $query->createNamedParameter($job->getId(), IQueryBuilder::PARAM_INT)));
-		$query->execute();
-	}
-
-	/**
-	 * @param IJob $job
-	 * @param $timeTaken
-	 */
-	public function setExecutionTime(IJob $job, $timeTaken) {
-		$query = $this->connection->getQueryBuilder();
-		$query->update('jobs')
-			->set('execution_duration', $query->createNamedParameter($timeTaken, IQueryBuilder::PARAM_INT))
-			->where($query->expr()->eq('id', $query->createNamedParameter($job->getId(), IQueryBuilder::PARAM_INT)));
-		$query->execute();
-	}
+    /** @var IDBConnection */
+    protected $connection;
+
+    /**@var IConfig */
+    protected $config;
+
+    /**@var ITimeFactory */
+    protected $timeFactory;
+
+    /**
+     * @param IDBConnection $connection
+     * @param IConfig $config
+     * @param ITimeFactory $timeFactory
+     */
+    public function __construct(IDBConnection $connection, IConfig $config, ITimeFactory $timeFactory) {
+        $this->connection = $connection;
+        $this->config = $config;
+        $this->timeFactory = $timeFactory;
+    }
+
+    /**
+     * @param IJob|string $job
+     * @param mixed $argument
+     */
+    public function add($job, $argument = null) {
+        if (!$this->has($job, $argument)) {
+            if ($job instanceof IJob) {
+                $class = get_class($job);
+            } else {
+                $class = $job;
+            }
+
+            $argument = json_encode($argument);
+            if (strlen($argument) > 4000) {
+                throw new \InvalidArgumentException('Background job arguments can\'t exceed 4000 characters (json encoded)');
+            }
+
+            $query = $this->connection->getQueryBuilder();
+            $query->insert('jobs')
+                ->values([
+                    'class' => $query->createNamedParameter($class),
+                    'argument' => $query->createNamedParameter($argument),
+                    'last_run' => $query->createNamedParameter(0, IQueryBuilder::PARAM_INT),
+                    'last_checked' => $query->createNamedParameter($this->timeFactory->getTime(), IQueryBuilder::PARAM_INT),
+                ]);
+            $query->execute();
+        }
+    }
+
+    /**
+     * @param IJob|string $job
+     * @param mixed $argument
+     */
+    public function remove($job, $argument = null) {
+        if ($job instanceof IJob) {
+            $class = get_class($job);
+        } else {
+            $class = $job;
+        }
+
+        $query = $this->connection->getQueryBuilder();
+        $query->delete('jobs')
+            ->where($query->expr()->eq('class', $query->createNamedParameter($class)));
+        if (!is_null($argument)) {
+            $argument = json_encode($argument);
+            $query->andWhere($query->expr()->eq('argument', $query->createNamedParameter($argument)));
+        }
+        $query->execute();
+    }
+
+    /**
+     * @param int $id
+     */
+    protected function removeById($id) {
+        $query = $this->connection->getQueryBuilder();
+        $query->delete('jobs')
+            ->where($query->expr()->eq('id', $query->createNamedParameter($id, IQueryBuilder::PARAM_INT)));
+        $query->execute();
+    }
+
+    /**
+     * check if a job is in the list
+     *
+     * @param IJob|string $job
+     * @param mixed $argument
+     * @return bool
+     */
+    public function has($job, $argument) {
+        if ($job instanceof IJob) {
+            $class = get_class($job);
+        } else {
+            $class = $job;
+        }
+        $argument = json_encode($argument);
+
+        $query = $this->connection->getQueryBuilder();
+        $query->select('id')
+            ->from('jobs')
+            ->where($query->expr()->eq('class', $query->createNamedParameter($class)))
+            ->andWhere($query->expr()->eq('argument', $query->createNamedParameter($argument)))
+            ->setMaxResults(1);
+
+        $result = $query->execute();
+        $row = $result->fetch();
+        $result->closeCursor();
+
+        return (bool) $row;
+    }
+
+    /**
+     * get all jobs in the list
+     *
+     * @return IJob[]
+     * @deprecated 9.0.0 - This method is dangerous since it can cause load and
+     * memory problems when creating too many instances.
+     */
+    public function getAll() {
+        $query = $this->connection->getQueryBuilder();
+        $query->select('*')
+            ->from('jobs');
+        $result = $query->execute();
+
+        $jobs = [];
+        while ($row = $result->fetch()) {
+            $job = $this->buildJob($row);
+            if ($job) {
+                $jobs[] = $job;
+            }
+        }
+        $result->closeCursor();
+
+        return $jobs;
+    }
+
+    /**
+     * get the next job in the list
+     *
+     * @return IJob|null
+     */
+    public function getNext() {
+        $query = $this->connection->getQueryBuilder();
+        $query->select('*')
+            ->from('jobs')
+            ->where($query->expr()->lte('reserved_at', $query->createNamedParameter($this->timeFactory->getTime() - 12 * 3600, IQueryBuilder::PARAM_INT)))
+            ->andWhere($query->expr()->lte('last_checked', $query->createNamedParameter($this->timeFactory->getTime(), IQueryBuilder::PARAM_INT)))
+            ->orderBy('last_checked', 'ASC')
+            ->setMaxResults(1);
+
+        $update = $this->connection->getQueryBuilder();
+        $update->update('jobs')
+            ->set('reserved_at', $update->createNamedParameter($this->timeFactory->getTime()))
+            ->set('last_checked', $update->createNamedParameter($this->timeFactory->getTime()))
+            ->where($update->expr()->eq('id', $update->createParameter('jobid')))
+            ->andWhere($update->expr()->eq('reserved_at', $update->createParameter('reserved_at')))
+            ->andWhere($update->expr()->eq('last_checked', $update->createParameter('last_checked')));
+
+        $result = $query->execute();
+        $row = $result->fetch();
+        $result->closeCursor();
+
+        if ($row) {
+            $update->setParameter('jobid', $row['id']);
+            $update->setParameter('reserved_at', $row['reserved_at']);
+            $update->setParameter('last_checked', $row['last_checked']);
+            $count = $update->execute();
+
+            if ($count === 0) {
+                // Background job already executed elsewhere, try again.
+                return $this->getNext();
+            }
+            $job = $this->buildJob($row);
+
+            if ($job === null) {
+                // set the last_checked to 12h in the future to not check failing jobs all over again
+                $reset = $this->connection->getQueryBuilder();
+                $reset->update('jobs')
+                    ->set('reserved_at', $reset->expr()->literal(0, IQueryBuilder::PARAM_INT))
+                    ->set('last_checked', $reset->createNamedParameter($this->timeFactory->getTime() + 12 * 3600, IQueryBuilder::PARAM_INT))
+                    ->where($reset->expr()->eq('id', $reset->createNamedParameter($row['id'], IQueryBuilder::PARAM_INT)));
+                $reset->execute();
+
+                // Background job from disabled app, try again.
+                return $this->getNext();
+            }
+
+            return $job;
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * @param int $id
+     * @return IJob|null
+     */
+    public function getById($id) {
+        $query = $this->connection->getQueryBuilder();
+        $query->select('*')
+            ->from('jobs')
+            ->where($query->expr()->eq('id', $query->createNamedParameter($id, IQueryBuilder::PARAM_INT)));
+        $result = $query->execute();
+        $row = $result->fetch();
+        $result->closeCursor();
+
+        if ($row) {
+            return $this->buildJob($row);
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * get the job object from a row in the db
+     *
+     * @param array $row
+     * @return IJob|null
+     */
+    private function buildJob($row) {
+        try {
+            try {
+                // Try to load the job as a service
+                /** @var IJob $job */
+                $job = \OC::$server->query($row['class']);
+            } catch (QueryException $e) {
+                if (class_exists($row['class'])) {
+                    $class = $row['class'];
+                    $job = new $class();
+                } else {
+                    // job from disabled app or old version of an app, no need to do anything
+                    return null;
+                }
+            }
+
+            $job->setId((int) $row['id']);
+            $job->setLastRun((int) $row['last_run']);
+            $job->setArgument(json_decode($row['argument'], true));
+            return $job;
+        } catch (AutoloadNotAllowedException $e) {
+            // job is from a disabled app, ignore
+            return null;
+        }
+    }
+
+    /**
+     * set the job that was last ran
+     *
+     * @param IJob $job
+     */
+    public function setLastJob(IJob $job) {
+        $this->unlockJob($job);
+        $this->config->setAppValue('backgroundjob', 'lastjob', $job->getId());
+    }
+
+    /**
+     * Remove the reservation for a job
+     *
+     * @param IJob $job
+     */
+    public function unlockJob(IJob $job) {
+        $query = $this->connection->getQueryBuilder();
+        $query->update('jobs')
+            ->set('reserved_at', $query->expr()->literal(0, IQueryBuilder::PARAM_INT))
+            ->where($query->expr()->eq('id', $query->createNamedParameter($job->getId(), IQueryBuilder::PARAM_INT)));
+        $query->execute();
+    }
+
+    /**
+     * set the lastRun of $job to now
+     *
+     * @param IJob $job
+     */
+    public function setLastRun(IJob $job) {
+        $query = $this->connection->getQueryBuilder();
+        $query->update('jobs')
+            ->set('last_run', $query->createNamedParameter(time(), IQueryBuilder::PARAM_INT))
+            ->where($query->expr()->eq('id', $query->createNamedParameter($job->getId(), IQueryBuilder::PARAM_INT)));
+        $query->execute();
+    }
+
+    /**
+     * @param IJob $job
+     * @param $timeTaken
+     */
+    public function setExecutionTime(IJob $job, $timeTaken) {
+        $query = $this->connection->getQueryBuilder();
+        $query->update('jobs')
+            ->set('execution_duration', $query->createNamedParameter($timeTaken, IQueryBuilder::PARAM_INT))
+            ->where($query->expr()->eq('id', $query->createNamedParameter($job->getId(), IQueryBuilder::PARAM_INT)));
+        $query->execute();
+    }
 }