<?php
// +----------------------------------------------------------------------
// | TOPThink [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2011 http://topthink.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 麦当苗儿 <zuojiazi.cn@gmail.com> <http://www.zjzit.cn>
// +----------------------------------------------------------------------

namespace Think;

// 内容解析类
class Transform {
    static private $handler = [];

    /**
     * 初始化解析驱动
     * @static 
     * @access private
     * @param  string $type 驱动类型
     */
    static private function init($type){
    	if(!isset(self::$handler[$type])) {
            $class = '\\Think\\Transform\\Driver\\' . ucwords($type);
            self::$handler[$type] = new $class();
        }
    }

    /**
     * 编码内容
     * @static 
     * @access public
     * @param  mixed  $content 要编码的数据
     * @param  string $type    数据类型
     * @return string          编码后的数据
     */
    static public function encode($content, $type){
        self::init($type);
        return self::$handler[$type]->encode($content);
    }

    /**
     * 解码数据
     * @param  string  $content 要解码的数据
     * @param  string  $type    数据类型
     * @param  boolean $assoc   是否返回数组
     * @return mixed            解码后的数据
     */
    static public function decode($content, $type, $assoc = true){
    	self::init($type);
    	return self::$handler[$type]->decode($content, $assoc);
    }

    // 调用驱动类的方法
    // Transform::xmlEncode('abc')
    // Transform::jsonDecode('abc', true);
	static public function __callStatic($method, $params){
		$type   = substr($method, 0, strlen($method) - 6);
		$method = strtolower(substr($method, -6));
		$assoc  = empty($params[2]) ? true : false;
        if(!in_array($method, ['encode', 'decode'])){
            throw new Think\Exception("call to undefined method {$method}");
        }
        return self::$method($params[0], $type, $assoc);
	}
}