<?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_Feed_Pubsubhubbub
 * @subpackage Callback
 * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id$
 */

/**
 * @category   Zend
 * @package    Zend_Feed_Pubsubhubbub
 * @subpackage Callback
 * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
interface Zend_Feed_Pubsubhubbub_CallbackInterface
{
    /**
     * Handle any callback from a Hub Server responding to a subscription or
     * unsubscription request. This should be the Hub Server confirming the
     * the request prior to taking action on it.
     *
     * @param ?array $httpData GET/POST data if available and not in $_GET/POST
     * @param bool $sendResponseNow Whether to send response now or when asked
     */
    public function handle(?array $httpData = null, $sendResponseNow = false);

    /**
     * Send the response, including all headers.
     * If you wish to handle this via Zend_Controller, use the getter methods
     * to retrieve any data needed to be set on your HTTP Response object, or
     * simply give this object the HTTP Response instance to work with for you!
     *
     * @return void
     */
    public function sendResponse();

    /**
     * An instance of a class handling Http Responses. This is implemented in
     * Zend_Feed_Pubsubhubbub_HttpResponse which shares an unenforced interface with
     * (i.e. not inherited from) Zend_Controller_Response_Http.
     *
     * @param Zend_Feed_Pubsubhubbub_HttpResponse|Zend_Controller_Response_Http $httpResponse
     */
    public function setHttpResponse($httpResponse);

    /**
     * An instance of a class handling Http Responses. This is implemented in
     * Zend_Feed_Pubsubhubbub_HttpResponse which shares an unenforced interface with
     * (i.e. not inherited from) Zend_Controller_Response_Http.
     *
     * @return Zend_Feed_Pubsubhubbub_HttpResponse|Zend_Controller_Response_Http
     */
    public function getHttpResponse();
}
