<?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: ThinkException.class.php 2791 2012-02-29 10:08:57Z liu21st $



/**

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

 * ThinkPHP系统异常基类

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

 * @category   Think

 * @package  Think

 * @subpackage  Exception

 * @author    liu21st <liu21st@gmail.com>

 * @version   $Id: ThinkException.class.php 2791 2012-02-29 10:08:57Z liu21st $

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

 */

class ThinkException extends Exception {



    /**

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

     * 异常类型

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

     * @var string

     * @access private

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

     */

    private $type;



    // 是否存在多余调试信息

    private $extra;



    /**

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

     * 架构函数

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

     * @access public

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

     * @param string $message  异常信息

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

     */

    public function __construct($message,$code=0,$extra=false) {

        parent::__construct($message,$code);

        $this->type = get_class($this);

        $this->extra = $extra;

    }



    /**

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

     * 异常输出 所有异常处理类均通过__toString方法输出错误

     * 每次异常都会写入系统日志

     * 该方法可以被子类重载

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

     * @access public

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

     * @return array

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

     */

    public function __toString() {

        $trace = $this->getTrace();

        if($this->extra)

            // 通过throw_exception抛出的异常要去掉多余的调试信息

            array_shift($trace);

        $this->class = $trace[0]['class'];

        $this->function = $trace[0]['function'];

        $this->file = $trace[0]['file'];

        $this->line = $trace[0]['line'];

        $file   =   file($this->file);

        $traceInfo='';

        $time = date('y-m-d H:i:m');

        foreach($trace as $t) {

            $traceInfo .= '['.$time.'] '.$t['file'].' ('.$t['line'].') ';

            $traceInfo .= $t['class'].$t['type'].$t['function'].'(';

            $traceInfo .= implode(', ', $t['args']);

            $traceInfo .=")\n";

        }

        $error['message']   = $this->message;

        $error['type']      = $this->type;

        $error['detail']    = L('_MODULE_').'['.MODULE_NAME.'] '.L('_ACTION_').'['.ACTION_NAME.']'."\n";

        $error['detail']   .=   ($this->line-2).': '.$file[$this->line-3];

        $error['detail']   .=   ($this->line-1).': '.$file[$this->line-2];

        $error['detail']   .=   '<font color="#FF6600" >'.($this->line).': <strong>'.$file[$this->line-1].'</strong></font>';

        $error['detail']   .=   ($this->line+1).': '.$file[$this->line];

        $error['detail']   .=   ($this->line+2).': '.$file[$this->line+1];

        $error['class']     =   $this->class;

        $error['function']  =   $this->function;

        $error['file']      = $this->file;

        $error['line']      = $this->line;

        $error['trace']     = $traceInfo;



        // 记录 Exception 日志

        if(C('LOG_EXCEPTION_RECORD')) {

            Log::Write('('.$this->type.') '.$this->message);

        }

        return $error ;

    }



}