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<?php
/*
* Copyright 2015-2017 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
*
* 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\DeleteResult;
use MongoDB\Driver\BulkWrite as Bulk;
use MongoDB\Driver\Exception\RuntimeException as DriverRuntimeException;
use MongoDB\Driver\Server;
use MongoDB\Driver\Session;
use MongoDB\Driver\WriteConcern;
use MongoDB\Exception\InvalidArgumentException;
use MongoDB\Exception\UnsupportedException;
use function is_array;
use function is_object;
use function MongoDB\server_supports_feature;
/**
* Operation for the delete command.
*
* This class is used internally by the DeleteMany and DeleteOne operation
* classes.
*
* @internal
* @see http://docs.mongodb.org/manual/reference/command/delete/
*/
class Delete implements Executable, Explainable
{
/** @var integer */
private static $wireVersionForCollation = 5;
/** @var string */
private $databaseName;
/** @var string */
private $collectionName;
/** @var array|object */
private $filter;
/** @var integer */
private $limit;
/** @var array */
private $options;
/**
* Constructs a delete command.
*
* Supported options:
*
* * collation (document): Collation specification.
*
* This is not supported for server versions < 3.4 and will result in an
* exception at execution time if used.
*
* * session (MongoDB\Driver\Session): Client session.
*
* Sessions are not supported for server versions < 3.6.
*
* * writeConcern (MongoDB\Driver\WriteConcern): Write concern.
*
* @param string $databaseName Database name
* @param string $collectionName Collection name
* @param array|object $filter Query by which to delete documents
* @param integer $limit The number of matching documents to
* delete. Must be 0 or 1, for all or a
* single document, respectively.
* @param array $options Command options
* @throws InvalidArgumentException for parameter/option parsing errors
*/
public function __construct($databaseName, $collectionName, $filter, $limit, array $options = [])
{
if (! is_array($filter) && ! is_object($filter)) {
throw InvalidArgumentException::invalidType('$filter', $filter, 'array or object');
}
if ($limit !== 0 && $limit !== 1) {
throw new InvalidArgumentException('$limit must be 0 or 1');
}
if (isset($options['collation']) && ! is_array($options['collation']) && ! is_object($options['collation'])) {
throw InvalidArgumentException::invalidType('"collation" option', $options['collation'], 'array or object');
}
if (isset($options['session']) && ! $options['session'] instanceof Session) {
throw InvalidArgumentException::invalidType('"session" option', $options['session'], Session::class);
}
if (isset($options['writeConcern']) && ! $options['writeConcern'] instanceof WriteConcern) {
throw InvalidArgumentException::invalidType('"writeConcern" option', $options['writeConcern'], WriteConcern::class);
}
if (isset($options['writeConcern']) && $options['writeConcern']->isDefault()) {
unset($options['writeConcern']);
}
$this->databaseName = (string) $databaseName;
$this->collectionName = (string) $collectionName;
$this->filter = $filter;
$this->limit = $limit;
$this->options = $options;
}
/**
* Execute the operation.
*
* @see Executable::execute()
* @param Server $server
* @return DeleteResult
* @throws DriverRuntimeException for other driver errors (e.g. connection errors)
*/
public function execute(Server $server)
{
if (isset($this->options['collation']) && ! server_supports_feature($server, self::$wireVersionForCollation)) {
throw UnsupportedException::collationNotSupported();
}
$inTransaction = isset($this->options['session']) && $this->options['session']->isInTransaction();
if ($inTransaction && isset($this->options['writeConcern'])) {
throw UnsupportedException::writeConcernNotSupportedInTransaction();
}
$bulk = new Bulk();
$bulk->delete($this->filter, $this->createDeleteOptions());
$writeResult = $server->executeBulkWrite($this->databaseName . '.' . $this->collectionName, $bulk, $this->createExecuteOptions());
return new DeleteResult($writeResult);
}
public function getCommandDocument(Server $server)
{
$cmd = ['delete' => $this->collectionName, 'deletes' => [['q' => $this->filter] + $this->createDeleteOptions()]];
if (isset($this->options['writeConcern'])) {
$cmd['writeConcern'] = $this->options['writeConcern'];
}
return $cmd;
}
/**
* Create options for the delete command.
*
* Note that these options are different from the bulk write options, which
* are created in createExecuteOptions().
*
* @return array
*/
private function createDeleteOptions()
{
$deleteOptions = ['limit' => $this->limit];
if (isset($this->options['collation'])) {
$deleteOptions['collation'] = (object) $this->options['collation'];
}
return $deleteOptions;
}
/**
* Create options for executing the bulk write.
*
* @see http://php.net/manual/en/mongodb-driver-server.executebulkwrite.php
* @return array
*/
private function createExecuteOptions()
{
$options = [];
if (isset($this->options['session'])) {
$options['session'] = $this->options['session'];
}
if (isset($this->options['writeConcern'])) {
$options['writeConcern'] = $this->options['writeConcern'];
}
return $options;
}
}