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<?php /*< * Copyright 2015-2017 MongoDB, Inc.> * Copyright 2015-present MongoDB, Inc.* * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at *< * http://www.apache.org/licenses/LICENSE-2.0> * https://www.apache.org/licenses/LICENSE-2.0* * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ namespace MongoDB\Operation;< use MongoDB\Driver\Command;> use MongoDB\Command\ListDatabases as ListDatabasesCommand;use MongoDB\Driver\Exception\RuntimeException as DriverRuntimeException; use MongoDB\Driver\Server;< use MongoDB\Driver\Session;use MongoDB\Exception\InvalidArgumentException; use MongoDB\Exception\UnexpectedValueException; use MongoDB\Model\DatabaseInfoIterator; use MongoDB\Model\DatabaseInfoLegacyIterator;< use function current; < use function is_array; < use function is_integer; < use function is_object;/** * Operation for the ListDatabases command. * * @api * @see \MongoDB\Client::listDatabases()< * @see http://docs.mongodb.org/manual/reference/command/ListDatabases/> * @see https://mongodb.com/docs/manual/reference/command/listDatabases/#mongodb-dbcommand-dbcmd.listDatabases`*/ class ListDatabases implements Executable {< /** @var array */ < private $options;> /** @var ListDatabasesCommand */ > private $listDatabases;/** * Constructs a listDatabases command. * * Supported options: *< * * filter (document): Query by which to filter databases.> * * authorizedDatabases (boolean): Determines which databases are returned > * based on the user privileges. > * > * For servers < 4.0.5, this option is ignored. > * > * * comment (mixed): BSON value to attach as a comment to this command. > * > * This is not supported for servers versions < 4.4.*< * For servers < 3.6, this option is ignored.> * * filter (document): Query by which to filter databases.* * * maxTimeMS (integer): The maximum amount of time to allow the query to * run. * * * session (MongoDB\Driver\Session): Client session. *< * Sessions are not supported for server versions < 3.6. < ** @param array $options Command options * @throws InvalidArgumentException for parameter/option parsing errors */ public function __construct(array $options = []) {< if (isset($options['filter']) && ! is_array($options['filter']) && ! is_object($options['filter'])) { < throw InvalidArgumentException::invalidType('"filter" option', $options['filter'], 'array or object'); < } < < if (isset($options['maxTimeMS']) && ! is_integer($options['maxTimeMS'])) { < throw InvalidArgumentException::invalidType('"maxTimeMS" option', $options['maxTimeMS'], 'integer'); < } < < if (isset($options['session']) && ! $options['session'] instanceof Session) { < throw InvalidArgumentException::invalidType('"session" option', $options['session'], Session::class); < } < < $this->options = $options;> $this->listDatabases = new ListDatabasesCommand(['nameOnly' => false] + $options);} /** * Execute the operation. * * @see Executable::execute()< * @param Server $server* @return DatabaseInfoIterator * @throws UnexpectedValueException if the command response was malformed * @throws DriverRuntimeException for other driver errors (e.g. connection errors) */ public function execute(Server $server) {< $cmd = ['listDatabases' => 1]; < < if (! empty($this->options['filter'])) { < $cmd['filter'] = (object) $this->options['filter']; < } < < if (isset($this->options['maxTimeMS'])) { < $cmd['maxTimeMS'] = $this->options['maxTimeMS']; < } < < $cursor = $server->executeReadCommand('admin', new Command($cmd), $this->createOptions()); < $cursor->setTypeMap(['root' => 'array', 'document' => 'array']); < $result = current($cursor->toArray()); < < if (! isset($result['databases']) || ! is_array($result['databases'])) { < throw new UnexpectedValueException('listDatabases command did not return a "databases" array'); < } < < /* Return an Iterator instead of an array in case listDatabases is < * eventually changed to return a command cursor, like the collection < * and index enumeration commands. This makes the "totalSize" command < * field inaccessible, but users can manually invoke the command if they < * need that value. < */ < return new DatabaseInfoLegacyIterator($result['databases']); < } < < /** < * Create options for executing the command. < * < * Note: read preference is intentionally omitted, as the spec requires that < * the command be executed on the primary. < * < * @see http://php.net/manual/en/mongodb-driver-server.executecommand.php < * @return array < */ < private function createOptions() < { < $options = []; < < if (isset($this->options['session'])) { < $options['session'] = $this->options['session']; < } < < return $options;> return new DatabaseInfoLegacyIterator($this->listDatabases->execute($server));} }