<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Queue

 * @subpackage Adapter

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

/**

 * @see Zend_Queue_Adapter_AdapterAbstract

 */

require_once 'Zend/Queue/Adapter/AdapterAbstract.php';

/**

 * Zend Platform JobQueue adapter

 *

 * @category   Zend

 * @package    Zend_Queue

 * @subpackage Adapter

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Queue_Adapter_PlatformJobQueue extends Zend_Queue_Adapter_AdapterAbstract

{

    /**

     * @var ZendApi_JobQueue

     */

    protected $_zendQueue;

    /**

     * Constructor

     *

     * @param  array|Zend_Config $options

     * @param  Zend_Queue|null $queue

     * @return void

     */

    public function __construct($options, Zend_Queue $queue = null)

    {

        parent::__construct($options, $queue);

        if (!extension_loaded("jobqueue_client")) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception('Platform Job Queue extension does not appear to be loaded');

        }

        if (! isset($this->_options['daemonOptions'])) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception('Job Queue host and password should be provided');

        }

        $options = $this->_options['daemonOptions'];

        if (!array_key_exists('host', $options)) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception('Platform Job Queue host should be provided');

        }

        if (!array_key_exists('password', $options)) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception('Platform Job Queue password should be provided');

        }

        $this->_zendQueue = new ZendApi_Queue($options['host']);

        if (!$this->_zendQueue) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception('Platform Job Queue connection failed');

        }

        if (!$this->_zendQueue->login($options['password'])) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception('Job Queue login failed');

        }

        if ($this->_queue) {

            $this->_queue->setMessageClass('Zend_Queue_Message_PlatformJob');

        }

    }

    /********************************************************************

     * Queue management functions

     ********************************************************************/

    /**

     * Does a queue already exist?

     *

     * @param  string $name

     * @return boolean

     * @throws Zend_Queue_Exception (not supported)

     */

    public function isExists($name)

    {

        require_once 'Zend/Queue/Exception.php';

        throw new Zend_Queue_Exception('isExists() is not supported in this adapter');

    }

    /**

     * Create a new queue

     *

     * @param  string  $name    queue name

     * @param  integer $timeout default visibility timeout

     * @return void

     * @throws Zend_Queue_Exception

     */

    public function create($name, $timeout=null)

    {

        require_once 'Zend/Queue/Exception.php';

        throw new Zend_Queue_Exception('create() is not supported in ' . get_class($this));

    }

    /**

     * Delete a queue and all of its messages

     *

     * @param  string $name queue name

     * @return void

     * @throws Zend_Queue_Exception

     */

    public function delete($name)

    {

        require_once 'Zend/Queue/Exception.php';

        throw new Zend_Queue_Exception('delete() is not supported in ' . get_class($this));

    }

    /**

     * Get an array of all available queues

     *

     * @return void

     * @throws Zend_Queue_Exception

     */

    public function getQueues()

    {

        require_once 'Zend/Queue/Exception.php';

        throw new Zend_Queue_Exception('getQueues() is not supported in this adapter');

    }

    /**

     * Return the approximate number of messages in the queue

     *

     * @param  Zend_Queue|null $queue

     * @return integer

     */

    public function count(Zend_Queue $queue = null)

    {

        if ($queue !== null) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception('Queue parameter is not supported');

        }

        return $this->_zendQueue->getNumOfJobsInQueue();

    }

    /********************************************************************

     * Messsage management functions

     ********************************************************************/

    /**

     * Send a message to the queue

     *

     * @param  array | ZendAPI_job $message Message to send to the active queue

     * @param  Zend_Queue $queue     Not supported

     * @return Zend_Queue_Message

     * @throws Zend_Queue_Exception

     */

    public function send($message, Zend_Queue $queue = null)

    {

        if ($queue !== null) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception('Queue parameter is not supported');

        }

        // This adapter can work only for this message type

        $classname = $this->_queue->getMessageClass();

        if (!class_exists($classname)) {

            require_once 'Zend/Loader.php';

            Zend_Loader::loadClass($classname);

        }

        if ($message instanceof ZendAPI_Job) {

            $message = array('data' => $message);

        }

        $zendApiJob = new $classname($message);

        // Unfortunately, the Platform JQ API is PHP4-style...

        $platformJob = $zendApiJob->getJob();

        $jobId = $this->_zendQueue->addJob($platformJob);

        if (!$jobId) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception('Failed to add a job to queue: '

                . $this->_zendQueue->getLastError());

        }

        $zendApiJob->setJobId($jobId);

        return $zendApiJob;

    }

    /**

     * Get messages in the queue

     *

     * @param  integer    $maxMessages  Maximum number of messages to return

     * @param  integer    $timeout      Ignored

     * @param  Zend_Queue $queue        Not supported

     * @throws Zend_Queue_Exception

     * @return ArrayIterator

     */

    public function receive($maxMessages = null, $timeout = null, Zend_Queue $queue = null)

    {

        if ($maxMessages === null) {

            $maxMessages = 1;

        }

        if ($queue !== null) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception('Queue shouldn\'t be set');

        }

        $jobs = $this->_zendQueue->getJobsInQueue(null, $maxMessages, true);

        $classname = $this->_queue->getMessageClass();

        if (!class_exists($classname)) {

            require_once 'Zend/Loader.php';

            Zend_Loader::loadClass($classname);

        }

        $options = array(

            'queue'        => $this->_queue,

            'data'         => $jobs,

            'messageClass' => $this->_queue->getMessageClass(),

        );

        $classname = $this->_queue->getMessageSetClass();

        if (!class_exists($classname)) {

            require_once 'Zend/Loader.php';

            Zend_Loader::loadClass($classname);

        }

        return new $classname($options);

    }

    /**

     * Delete a message from the queue

     *

     * Returns true if the message is deleted, false if the deletion is

     * unsuccessful.

     *

     * @param  Zend_Queue_Message $message

     * @return boolean

     * @throws Zend_Queue_Exception

     */

    public function deleteMessage(Zend_Queue_Message $message)

    {

        if (get_class($message) != $this->_queue->getMessageClass()) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception(

                'Failed to remove job from the queue; only messages of type '

                . 'Zend_Queue_Message_PlatformJob may be used'

            );

        }

        return $this->_zendQueue->removeJob($message->getJobId());

    }

    public function isJobIdExist($id)

    {

         return (($this->_zendQueue->getJob($id))? true : false);

    }

    /********************************************************************

     * Supporting functions

     ********************************************************************/

    /**

     * Return a list of queue capabilities functions

     *

     * $array['function name'] = true or false

     * true is supported, false is not supported.

     *

     * @param  string $name

     * @return array

     */

    public function getCapabilities()

    {

         return array(

            'create'                => false,

            'delete'                => false,

            'getQueues'             => false,

            'isExists'              => false,

            'count'                 => true,

            'send'                  => true,

            'receive'               => true,

            'deleteMessage'         => true,

        );

    }

    /********************************************************************

     * Functions that are not part of the Zend_Queue_Adapter_AdapterAbstract

     ********************************************************************/

    /**

     * Serialize

     *

     * @return array

     */

    public function __sleep()

    {

        return array('_options');

    }

    /**

     * Unserialize

     *

     * @return void

     */

    public function __wakeup()

    {

        $options = $this->_options['daemonOptions'];

        $this->_zendQueue = new ZendApi_Queue($options['host']);

        if (!$this->_zendQueue) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception('Platform Job Queue connection failed');

        }

        if (!$this->_zendQueue->login($options['password'])) {

            require_once 'Zend/Queue/Exception.php';

            throw new Zend_Queue_Exception('Job Queue login failed');

        }

    }

}