<?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\Driver\Exception\CommandException;


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 current;
use function is_array;

< use function MongoDB\server_supports_feature;



/**
 * Operation for the drop command.
 *
 * @api
 * @see \MongoDB\Collection::drop()
 * @see \MongoDB\Database::dropCollection()

<  * @see http://docs.mongodb.org/manual/reference/command/drop/



>  * @see https://mongodb.com/docs/manual/reference/command/drop/


 */
class DropCollection implements Executable
{

<     /** @var string */
<     private static $errorMessageNamespaceNotFound = 'ns not found';
< 


    /** @var integer */

<     private static $wireVersionForWriteConcern = 5;



>     private static $errorCodeNamespaceNotFound = 26;



    /** @var string */
    private $databaseName;

    /** @var string */
    private $collectionName;

    /** @var array */
    private $options;

    /**
     * Constructs a drop command.
     *
     * Supported options:
     *

<      *  * session (MongoDB\Driver\Session): Client session.



>      *  * comment (mixed): BSON value to attach as a comment to this command.
>      *
>      *    This is not supported for servers versions < 4.4.


     *

<      *    Sessions are not supported for server versions < 3.6.



>      *  * session (MongoDB\Driver\Session): Client session.


     *
     *  * typeMap (array): Type map for BSON deserialization. This will be used
     *    for the returned command result document.
     *
     *  * writeConcern (MongoDB\Driver\WriteConcern): Write concern.
     *

<      *    This is not supported for server versions < 3.4 and will result in an
<      *    exception at execution time if used.
<      *


     * @param string $databaseName   Database name
     * @param string $collectionName Collection name
     * @param array  $options        Command options
     * @throws InvalidArgumentException for parameter/option parsing errors
     */

<     public function __construct($databaseName, $collectionName, array $options = [])



>     public function __construct(string $databaseName, string $collectionName, array $options = [])


    {
        if (isset($options['session']) && ! $options['session'] instanceof Session) {
            throw InvalidArgumentException::invalidType('"session" option', $options['session'], Session::class);
        }

        if (isset($options['typeMap']) && ! is_array($options['typeMap'])) {
            throw InvalidArgumentException::invalidType('"typeMap" option', $options['typeMap'], 'array');
        }

        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->databaseName = $databaseName;
>         $this->collectionName = $collectionName;


        $this->options = $options;
    }

    /**
     * Execute the operation.
     *
     * @see Executable::execute()

<      * @param Server $server


     * @return array|object Command result document

<      * @throws UnsupportedException if writeConcern is used and unsupported



>      * @throws UnsupportedException if write concern is used and unsupported


     * @throws DriverRuntimeException for other driver errors (e.g. connection errors)
     */
    public function execute(Server $server)
    {

<         if (isset($this->options['writeConcern']) && ! server_supports_feature($server, self::$wireVersionForWriteConcern)) {
<             throw UnsupportedException::writeConcernNotSupported();
<         }
< 


        $inTransaction = isset($this->options['session']) && $this->options['session']->isInTransaction();
        if ($inTransaction && isset($this->options['writeConcern'])) {
            throw UnsupportedException::writeConcernNotSupportedInTransaction();
        }


<         $command = new Command(['drop' => $this->collectionName]);
< 


        try {

<             $cursor = $server->executeWriteCommand($this->databaseName, $command, $this->createOptions());
<         } catch (DriverRuntimeException $e) {



>             $cursor = $server->executeWriteCommand($this->databaseName, $this->createCommand(), $this->createOptions());
>         } catch (CommandException $e) {


            /* The server may return an error if the collection does not exist.

<              * Check for an error message (unfortunately, there isn't a code)
<              * and NOP instead of throwing.
<              */
<             if ($e->getMessage() === self::$errorMessageNamespaceNotFound) {
<                 return (object) ['ok' => 0, 'errmsg' => self::$errorMessageNamespaceNotFound];



>              * Check for an error code and return the command reply instead of
>              * throwing. */
>             if ($e->getCode() === self::$errorCodeNamespaceNotFound) {
>                 return $e->getResultDocument();


            }

            throw $e;
        }

        if (isset($this->options['typeMap'])) {
            $cursor->setTypeMap($this->options['typeMap']);
        }

        return current($cursor->toArray());
    }

    /**

>      * Create the drop command.
     * Create options for executing the command.
>      */
     *
>     private function createCommand(): Command
     * @see http://php.net/manual/en/mongodb-driver-server.executewritecommand.php
>     {
     * @return array
>         $cmd = ['drop' => $this->collectionName];
     */
> 
    private function createOptions()
>         if (isset($this->options['comment'])) {
    {
>             $cmd['comment'] = $this->options['comment'];
        $options = [];
>         }

> 
        if (isset($this->options['session'])) {
>         return new Command($cmd);
            $options['session'] = $this->options['session'];
>     }
        }
> 

>     /**



<      * @see http://php.net/manual/en/mongodb-driver-server.executewritecommand.php
<      * @return array



>      * @see https://php.net/manual/en/mongodb-driver-server.executewritecommand.php



<     private function createOptions()



>     private function createOptions(): array



        return $options;
    }
}