<?php
namespace apps\base\controllers;
use base\Controller;

abstract class RestController extends Controller{
	// 当前请求类型
    protected $_method = '';
    // 当前请求的资源类型
    protected $_type = '';
    // REST允许的请求类型列表
    protected $allowMethod = array('get', 'post', 'put', 'delete');
    // REST默认请求类型
    protected $defaultMethod = 'get';
    // REST允许请求的资源类型列表
    protected $allowType = array('html', 'xml', 'json', 'rss');
    // 默认的资源类型
    protected $defaultType = 'html';
    // REST允许输出的资源类型列表
    protected $allowOutputType = array(
        'xml' => 'application/xml',
        'json' => 'application/json',
        'html' => 'text/html',
    );
    //安全密钥key
    protected $key = '1234561234564';
    public $user_id = 0;
    public $access_token = '';

    /**
     * 架构函数
     * @access public
     */
    public function __construct()
    {
        parent::__construct();
        // 资源类型检测
        if ('' == REST_EXTEND) { // 自动检测资源类型
            $this->_type = $this->getAcceptType();
        } elseif (!in_array(REST_EXTEND, $this->allowType)) {
            // 资源类型非法 则用默认资源类型访问
            $this->_type = $this->defaultType;
        } else {
            $this->_type = REST_EXTEND;
        }

        // 请求方式检测
        $method = strtolower(REQUEST_METHOD);
        if (!in_array($method, $this->allowMethod)) {
            // 请求方式非法 则用默认请求方法
            $method = $this->defaultMethod;
        }
        $this->_method = $method;
        //print_r($_SESSION);
        $session = I_A('session');
        $session = $session && !is_array($session) ? json_decode($session, true) : $session;
        //$this->user_id = $session['uid'] = 1;
        //$this->user_id = 1;
        //$this->access_token = $session['token'] = 'c6a6a4d1c53bcfb641eacfcc77d33619';
        //$this->access_token = 'c6a6a4d1c53bcfb641eacfcc77d33619';
        if (isset($session['uid']) && isset($session['token'])) {
            $this->user_id = $session['uid'];
            $this->access_token = $session['token'];
        }
    }

    /**
     * 魔术方法 有不存在的操作的时候执行
     * @access public
     * @param string $method 方法名
     * @param array $args 参数
     * @return mixed
     */
    public function __call($method, $args)
    {
        if (0 === strcasecmp($method, ACTION_NAME . C('ACTION_SUFFIX'))) {
            if (method_exists($this, $method . '_' . $this->_method . '_' . $this->_type)) { // RESTFul方法支持
                $fun = $method . '_' . $this->_method . '_' . $this->_type;
                $this->$fun();
            } elseif ($this->_method == $this->defaultMethod && method_exists($this, $method . '_' . $this->_type)) {
                $fun = $method . '_' . $this->_type;
                $this->$fun();
            } elseif ($this->_type == $this->defaultType && method_exists($this, $method . '_' . $this->_method)) {
                $fun = $method . '_' . $this->_method;
                $this->$fun();
            } elseif (method_exists($this, '_empty')) {
                // 如果定义了_empty操作 则调用
                $this->_empty($method, $args);
            } elseif (file_exists_case($this->view->parseTemplate())) {
                // 检查是否存在默认模版 如果有直接输出模版
                $this->display();
            } else {
                die('_ERROR_ACTION_:' . ACTION_NAME);
            }
        }
    }

    /**
     * 获取当前请求的Accept头信息
     * @return string
     */
    protected function getAcceptType()
    {
        $type = array(
            'xml' => 'application/xml,text/xml,application/x-xml',
            'json' => 'application/json,text/x-json,application/jsonrequest,text/json',
            'js' => 'text/javascript,application/javascript,application/x-javascript',
            'css' => 'text/css',
            'rss' => 'application/rss+xml',
            'yaml' => 'application/x-yaml,text/yaml',
            'atom' => 'application/atom+xml',
            'pdf' => 'application/pdf',
            'text' => 'text/plain',
            'png' => 'image/png',
            'jpg' => 'image/jpg,image/jpeg,image/pjpeg',
            'gif' => 'image/gif',
            'csv' => 'text/csv',
            'html' => 'text/html,application/xhtml+xml,*/*'
        );

        foreach ($type as $key => $val) {
            $array = explode(',', $val);
            foreach ($array as $k => $v) {
                if (stristr($_SERVER['HTTP_ACCEPT'], $v)) {
                    return $key;
                }
            }
        }
        return false;
    }

    // 发送Http状态信息
    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]);
            // 确保FastCGI模式下正常
            header('Status:' . $code . ' ' . $_status[$code]);
        }
    }

    /**
     * 编码数据
     * @access protected
     * @param mixed $data 要返回的数据
     * @param String $type 返回类型 JSON XML
     * @return string
     */
    protected function encodeData($data, $type = '')
    {
        if (empty($data)) return '';
        if ('json' == $type) {
            // 返回JSON数据格式到客户端 包含状态信息
            $data = json_encode($data);
        } elseif ('xml' == $type) {
            // 返回xml格式数据
            $data = xml_encode($data);
        } elseif ('php' == $type) {
            $data = serialize($data);
        }// 默认直接输出
        $this->setContentType($type);
        //header('Content-Length: ' . strlen($data));
        return $data;
    }

    /**
     * 设置页面输出的CONTENT_TYPE和编码
     * @access public
     * @param string $type content_type 类型对应的扩展名
     * @param string $charset 页面输出编码
     * @return void
     */
    public function setContentType($type, $charset = 'utf-8')
    {
        if (headers_sent()) return;
        $type = strtolower($type);
        if (isset($this->allowOutputType[$type])) //过滤content_type
            header('Content-Type: ' . $this->allowOutputType[$type] . '; charset=' . $charset);
    }

    /**
     * 输出返回数据
     * @access protected
     * @param mixed $data 要返回的数据
     * @param String $type 返回类型 JSON XML
     * @param integer $code HTTP状态
     * @return void
     */
    protected function response($data, $code = 200, $type = 'JSON', $extends = array())
    {
        $this->sendHttpStatus($code);
        if (!is_array($data)) {
            $status = array(
                'status' => array(
                    'code' => 0,
                    'error_message' => $data,
                    'url' => isset($extends['url']) ? $extends['url'] : ''
                )
            );
            exit($this->encodeData($status, strtolower($type)));
        }
        if (isset($data['response'])) {
            $data = $data['response'];
        }
        $data = array_merge(array('response' => $data), array('status' => array('code' => 1)));
        if (is_array($extends) && !empty($extends)) {
            $data = array_merge($data, $extends);
        }
        exit($this->encodeData($data, strtolower($type)));
    }
}