<?php

// +----------------------------------------------------------------------

// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]

// +----------------------------------------------------------------------

// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.

// +----------------------------------------------------------------------

// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )

// +----------------------------------------------------------------------

// | Author: liu21st <liu21st@gmail.com>

// +----------------------------------------------------------------------

// $Id: Action.class.php 2832 2012-03-21 01:05:36Z huangdijia $



/**

 +------------------------------------------------------------------------------

 * ThinkPHP RESTFul ????? ???

 +------------------------------------------------------------------------------

 * @category   Think

 * @package  Think

 * @subpackage  Core

 * @author   liu21st <liu21st@gmail.com>

 * @version  $Id: Action.class.php 2832 2012-03-21 01:05:36Z huangdijia $

 +------------------------------------------------------------------------------

 */

abstract class Action {



    // ??Action??

    private $name =  '';

    // ????

    protected $view   =  null;

    protected $_method =  ''; // ??????

    protected $_type = ''; // ??????

    // ????

    protected $_types = array();



   /**

     +----------------------------------------------------------

     * ???? ????????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     */

    public function __construct() {

        //??????

        $this->view       = Think::instance('View');



        defined('__EXT__') or define('__EXT__','');

        if(''== __EXT__ || false === stripos(C('REST_CONTENT_TYPE_LIST'),__EXT__)) {

            // ???????????? ??????????

            $this->_type   =  C('REST_DEFAULT_TYPE');

        }else{

            $this->_type   =  __EXT__;

        }



        // ??????

        $method  =  strtolower($_SERVER['REQUEST_METHOD']);

        if(false === stripos(C('REST_METHOD_LIST'),$method)) {

            // ?????? ????????

            $method = C('REST_DEFAULT_METHOD');

        }

        $this->_method = $method;

        // ?????????

        $this->_types  = C('REST_OUTPUT_TYPE');



        //??????

        if(method_exists($this,'_initialize'))

            $this->_initialize();

    }



   /**

     +----------------------------------------------------------

     * ????Action??

     +----------------------------------------------------------

     * @access protected

     +----------------------------------------------------------

     */

    protected function getActionName() {

        if(empty($this->name)) {

            // ??Action??

            $this->name     =   substr(get_class($this),0,-6);

        }

        return $this->name;

    }



    /**

     +----------------------------------------------------------

     * ??AJAX??

     +----------------------------------------------------------

     * @access protected

     +----------------------------------------------------------

     * @return bool

     +----------------------------------------------------------

     */

    protected function isAjax() {

        if(isset($_SERVER['HTTP_X_REQUESTED_WITH']) ) {

            if('xmlhttprequest' == strtolower($_SERVER['HTTP_X_REQUESTED_WITH']))

                return true;

        }

        if(!empty($_POST[C('VAR_AJAX_SUBMIT')]) || !empty($_GET[C('VAR_AJAX_SUBMIT')]))

            // ??Ajax????

            return true;

        return false;

    }



    /**

     +----------------------------------------------------------

     * ???? ????????????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @param string $method ???

     * @param array $args ??

     +----------------------------------------------------------

     * @return mixed

     +----------------------------------------------------------

     */

    public function __call($method,$args) {

        if( 0 === strcasecmp($method,ACTION_NAME)) {

            if(method_exists($this,$method.'_'.$this->_method.'_'.$this->_type)) { // RESTFul????

                $fun  =  $method.'_'.$this->_method.'_'.$this->_type;

                $this->$fun();

            }elseif($this->_method == C('REST_DEFAULT_METHOD') && method_exists($this,$method.'_'.$this->_type) ){

                $fun  =  $method.'_'.$this->_type;

                $this->$fun();

            }elseif($this->_type == C('REST_DEFAULT_TYPE') && method_exists($this,$method.'_'.$this->_method) ){

                $fun  =  $method.'_'.$this->_method;

                $this->$fun();

            }elseif(method_exists($this,'_empty')) {

                // ?????_empty?? ???

                $this->_empty($method,$args);

            }elseif(file_exists_case(C('TMPL_FILE_NAME'))){

                // ?????????? ?????????

                $this->display();

            }else{

                // ????

                throw_exception(L('_ERROR_ACTION_').ACTION_NAME);

            }

        }else{

            switch(strtolower($method)) {

                // ???? ???????? ???? $this->_post($key,$filter,$default);

                case '_get': $input =& $_GET;break;

                case '_post':$input =& $_POST;break;

                case '_put':

                case '_delete':parse_str(file_get_contents('php://input'), $input);break;

                case '_request': $input =& $_REQUEST;break;

                case '_session': $input =& $_SESSION;break;

                case '_cookie':  $input =& $_COOKIE;break;

                case '_server':  $input =& $_SERVER;break;

                default:

                    throw_exception(__CLASS__.':'.$method.L('_METHOD_NOT_EXIST_'));

            }

            if(isset($input[$args[0]])) { // ????

                $data	 =	 $input[$args[0]];

                $fun  =  $args[1]?$args[1]:C('DEFAULT_FILTER');

                $data	 =	 $fun($data); // ????

            }else{ // ?????

                $data	 =	 isset($args[2])?$args[2]:NULL;

            }

            return $data;

        }

    }



    /**

     +----------------------------------------------------------

     * ????

     * ??????????????

     +----------------------------------------------------------

     * @access protected

     +----------------------------------------------------------

     * @param string $templateFile ??????????

     * ???? ???????????

     * @param string $charset ????

     * @param string $contentType ????

     +----------------------------------------------------------

     * @return void

     +----------------------------------------------------------

     */

    protected function display($templateFile='',$charset='',$contentType='') {

        $this->view->display($templateFile,$charset,$contentType);

    }



    /**

     +----------------------------------------------------------

     * ??????

     +----------------------------------------------------------

     * @access protected

     +----------------------------------------------------------

     * @param mixed $name ????????

     * @param mixed $value ????

     +----------------------------------------------------------

     * @return void

     +----------------------------------------------------------

     */

    protected function assign($name,$value='') {

        $this->view->assign($name,$value);

    }



    public function __set($name,$value) {

        $this->view->assign($name,$value);

    }



    /**

     +----------------------------------------------------------

     * ???????CONTENT_TYPE???

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @param string $type content_type ????????

     * @param string $charset ??????

     +----------------------------------------------------------

     * @return void

     +----------------------------------------------------------

     */

    public function setContentType($type, $charset=''){

        if(headers_sent()) return;

        if(empty($charset))  $charset = C('DEFAULT_CHARSET');

        $type = strtolower($type);

        if(isset($this->_types[$type])) //??content_type

            header('Content-Type: '.$this->_types[$type].'; charset='.$charset);

    }



    /**

     +----------------------------------------------------------

     * ??????

     +----------------------------------------------------------

     * @access protected

     +----------------------------------------------------------

     * @param mixed $data ??????

     * @param String $type ???? JSON XML

     * @param integer $code HTTP??

     +----------------------------------------------------------

     * @return void

     +----------------------------------------------------------

     */

    protected function response($data,$type='',$code=200) {

        $this->sendHttpStatus($code);

        exit($this->encodeData($data,strtolower($type)));

    }



    /**

     +----------------------------------------------------------

     * ????

     +----------------------------------------------------------

     * @access protected

     +----------------------------------------------------------

     * @param mixed $data ??????

     * @param String $type ???? JSON XML

     +----------------------------------------------------------

     * @return void

     +----------------------------------------------------------

     */

    protected function encodeData($data,$type='') {

        if(empty($data))  return '';

        if(empty($type)) $type =  $this->_type;

        if('json' == $type) {

            // ??JSON???????? ??????

            $data = json_encode($data);

        }elseif('xml' == $type){

            // ??xml????

            $data = xml_encode($data);

        }elseif('php'==$type){

            $data = serialize($data);

        }// ??????

        $this->setContentType($type);

        header('Content-Length: ' . strlen($data));

        return $data;

    }



    // ??Http????

    protected function sendHttpStatus($code) {

        static $_status = array(

            // Informational 1xx

            100 => 'Continue',

            101 => 'Switching Protocols',

            // Success 2xx

            200 => 'OK',

            201 => 'Created',

            202 => 'Accepted',

            203 => 'Non-Authoritative Information',

            204 => 'No Content',

            205 => 'Reset Content',

            206 => 'Partial Content',

            // Redirection 3xx

            300 => 'Multiple Choices',

            301 => 'Moved Permanently',

            302 => 'Moved Temporarily ',  // 1.1

            303 => 'See Other',

            304 => 'Not Modified',

            305 => 'Use Proxy',

            // 306 is deprecated but reserved

            307 => 'Temporary Redirect',

            // Client Error 4xx

            400 => 'Bad Request',

            401 => 'Unauthorized',

            402 => 'Payment Required',

            403 => 'Forbidden',

            404 => 'Not Found',

            405 => 'Method Not Allowed',

            406 => 'Not Acceptable',

            407 => 'Proxy Authentication Required',

            408 => 'Request Timeout',

            409 => 'Conflict',

            410 => 'Gone',

            411 => 'Length Required',

            412 => 'Precondition Failed',

            413 => 'Request Entity Too Large',

            414 => 'Request-URI Too Long',

            415 => 'Unsupported Media Type',

            416 => 'Requested Range Not Satisfiable',

            417 => 'Expectation Failed',

            // Server Error 5xx

            500 => 'Internal Server Error',

            501 => 'Not Implemented',

            502 => 'Bad Gateway',

            503 => 'Service Unavailable',

            504 => 'Gateway Timeout',

            505 => 'HTTP Version Not Supported',

            509 => 'Bandwidth Limit Exceeded'

        );

        if(isset($_status[$code])) {

            header('HTTP/1.1 '.$code.' '.$_status[$code]);

            // ??FastCGI?????

            header('Status:'.$code.' '.$_status[$code]);

        }

    }



   /**

     +----------------------------------------------------------

     * ????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     */

    public function __destruct() {

        // ????

        if(C('LOG_RECORD')) Log::save();

        // ??????

        tag('action_end');

    }

}