<?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_Controller

 * @subpackage Zend_Controller_Action_Helper

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

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

 * @version    $Id: Json.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * @see Zend_Controller_Action_Helper_Abstract

 */

require_once 'Zend/Controller/Action/Helper/Abstract.php';

/**

 * Simplify AJAX context switching based on requested format

 *

 * @uses       Zend_Controller_Action_Helper_Abstract

 * @category   Zend

 * @package    Zend_Controller

 * @subpackage Zend_Controller_Action_Helper

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

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

 */

class Zend_Controller_Action_Helper_Json extends Zend_Controller_Action_Helper_Abstract

{

    /**

     * Suppress exit when sendJson() called

     * @var boolean

     */

    public $suppressExit = false;

    /**

     * Create JSON response

     *

     * Encodes and returns data to JSON. Content-Type header set to

     * 'application/json', and disables layouts and viewRenderer (if being

     * used).

     *

     * @param  mixed   $data

     * @param  boolean $keepLayouts

     * @param  boolean|array $keepLayouts

     * NOTE:   if boolean, establish $keepLayouts to true|false

     *         if array, admit params for Zend_Json::encode as enableJsonExprFinder=>true|false

     *         if $keepLayouts and parmas for Zend_Json::encode are required

     *         then, the array can contains a 'keepLayout'=>true|false

     *         that will not be passed to Zend_Json::encode method but will be passed

     *         to Zend_View_Helper_Json

     * @throws Zend_Controller_Action_Helper_Json

     * @return string

     */

    public function encodeJson($data, $keepLayouts = false)

    {

        /**

         * @see Zend_View_Helper_Json

         */

        require_once 'Zend/View/Helper/Json.php';

        $jsonHelper = new Zend_View_Helper_Json();

        $data = $jsonHelper->json($data, $keepLayouts);

        if (!$keepLayouts) {

            /**

             * @see Zend_Controller_Action_HelperBroker

             */

            require_once 'Zend/Controller/Action/HelperBroker.php';

            Zend_Controller_Action_HelperBroker::getStaticHelper('viewRenderer')->setNoRender(true);

        }

        return $data;

    }

    /**

     * Encode JSON response and immediately send

     *

     * @param  mixed   $data

     * @param  boolean|array $keepLayouts

     * NOTE:   if boolean, establish $keepLayouts to true|false

     *         if array, admit params for Zend_Json::encode as enableJsonExprFinder=>true|false

     *         if $keepLayouts and parmas for Zend_Json::encode are required

     *         then, the array can contains a 'keepLayout'=>true|false

     *         that will not be passed to Zend_Json::encode method but will be passed

     *         to Zend_View_Helper_Json

     * @return string|void

     */

    public function sendJson($data, $keepLayouts = false)

    {

        $data = $this->encodeJson($data, $keepLayouts);

        $response = $this->getResponse();

        $response->setBody($data);

        if (!$this->suppressExit) {

            $response->sendResponse();

            exit;

        }

        return $data;

    }

    /**

     * Strategy pattern: call helper as helper broker method

     *

     * Allows encoding JSON. If $sendNow is true, immediately sends JSON

     * response.

     *

     * @param  mixed   $data

     * @param  boolean $sendNow

     * @param  boolean $keepLayouts

     * @return string|void

     */

    public function direct($data, $sendNow = true, $keepLayouts = false)

    {

        if ($sendNow) {

            return $this->sendJson($data, $keepLayouts);

        }

        return $this->encodeJson($data, $keepLayouts);

    }

}