<?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 hide@address.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Facebook_Api_Exception
 * @subpackage Facebook
 * @copyright  Copyright (c) 2005-2010 PHPSA . (http://www.phpsa.co.za)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: FacebookController.php 
 */

class Facebook_Api_Exception extends Zend_Exception {

    /**
     * The result from the API server that represents the exception information.
     */
    protected $result;

    /**
     * Make a new API Exception with the given result.
     *
     * @param Array $result the result from the API server
     */
    public function __construct($result = '') {
        if (is_object($result)) {
            $result = $this->toArray($result);
        }
        $this->result = $result;

        $code = isset($result['error_code']) ? $result['error_code'] : 0;

        if (isset($result['error_description'])) {
// OAuth 2.0 Draft 10 style
            $msg = $result['error_description'];
        } else if (isset($result['error']) && is_array($result['error'])) {
// OAuth 2.0 Draft 00 style
            $msg = $result['error']['message'];
        } else if (isset($result['error_msg'])) {
// Rest server style
            $msg = $result['error_msg'];
        } elseif (is_array($result)) {
            $msg = 'Unknown Error. Check getResult()';
        } else {
            $msg = $result;
        }

        parent::__construct($msg, $code);
    }

    /**
     * Return the associated result object returned by the API server.
     *
     * @returns Array the result from the API server
     */
    public function getResult() {
        return $this->result;
    }

    /**
     * Returns the associated type for the error. This will default to
     * 'Exception' when a type is not available.
     *
     * @return String
     */
    public function getType() {
        if (isset($this->result['error'])) {
            $error = $this->result['error'];
            if (is_string($error)) {
                // OAuth 2.0 Draft 10 style
                return $error;
            } else if (is_array($error)) {
                // OAuth 2.0 Draft 00 style
                if (isset($error['type'])) {
                    return $error['type'];
                }
            }
        }
        return 'Exception';
    }

    /**
     * To make debugging easier.
     *
     * @returns String the string representation of the error
     */
    public function __toString() {
        $str = $this->getType() . ': ';
        if ($this->code != 0) {
            $str .= $this->code . ': ';
        }
        return $str . $this->message;
    }

    function toArray($str) {
        $ob = array();
        if (is_array($str)) {
            foreach ($str as $k => $v) {
                $ob[$k] = $this->toArray($v);
            }
            return $ob;
        } else {
            return $str;
        }
    }

}