<?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_Http

 * @subpackage UserAgent

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

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

 */

/**

 * Zend_Http_UserAgent_Features_Adapter_Interface

 */

require_once 'Zend/Http/UserAgent/Features/Adapter.php';

/**

 * Features adapter build with the Tera Wurfl Api

 * See installation instruction here : http://www.tera-wurfl.com/wiki/index.php/Installation 

 * Download : http://www.tera-wurfl.com/wiki/index.php/Downloads

 *

 * @package    Zend_Http

 * @subpackage UserAgent

 * @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_Http_UserAgent_Features_Adapter_TeraWurfl implements Zend_Http_UserAgent_Features_Adapter

{

    /**

     * Get features from request

     *

     * @param  array $request $_SERVER variable

     * @return array

     */

    public static function getFromRequest($request, array $config)

    {

        if (!class_exists('TeraWurfl')) {

            // If TeraWurfl class not found, see if we can load it from 

            // configuration

            //

            if (!isset($config['terawurfl'])) {

                // No configuration

                require_once 'Zend/Http/UserAgent/Features/Exception.php';

                throw new Zend_Http_UserAgent_Features_Exception('"TeraWurfl" configuration is not defined');

            }

            $config = $config['terawurfl'];

             if (empty($config['terawurfl_lib_dir'])) {

                // No lib_dir given

                require_once 'Zend/Http/UserAgent/Features/Exception.php';

                throw new Zend_Http_UserAgent_Features_Exception('The "terawurfl_lib_dir" parameter is not defined');

            }

            // Include the Tera-WURFL file

            require_once ($config['terawurfl_lib_dir'] . '/TeraWurfl.php');

        }

        // instantiate the Tera-WURFL object

        $wurflObj = new TeraWurfl();

        // Get the capabilities of the current client.

        $matched = $wurflObj->getDeviceCapabilitiesFromRequest(array_change_key_case($request, CASE_UPPER));

        return self::getAllCapabilities($wurflObj);

    }

    /***

     * Builds an array with all capabilities

     * 

     * @param TeraWurfl $wurflObj TeraWurfl object

     */

    public static function getAllCapabilities(TeraWurfl $wurflObj)

    {

        foreach ($wurflObj->capabilities as $group) {

            if (!is_array($group)) {

                continue;

            }

            while (list ($key, $value) = each($group)) {

                if (is_bool($value)) {

                    // to have the same type than the official WURFL API

                    $features[$key] = ($value ? 'true' : 'false');

                } else {

                    $features[$key] = $value;

                }

            }

        }

        return $features;

    }

}