<?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: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace Think;
class Log {

    // 日志信息
    static protected $log       =  [];
    static protected $level     =  ['ERR','NOTIC','DEBUG','SQL','INFO'];
    static protected $storage   =   null;

    // 日志初始化
    static public function init($config=[]){
        $type   =   isset($config['type'])?$config['type']:'File';
        $class  =   'Think\\Log\\Driver\\'. ucwords($type);
        if(class_exists($class)) {
            unset($config['type']);
            self::$storage = new $class($config);
        }else{
            throw new \Exception('Log type not exists:'.$type);
        }
    }

    /**
     * 记录日志 并且会过滤未经设置的级别
     * @access public
     * @param string $message 日志信息
     * @param string $level  日志级别
     * @param boolean $record  是否强制记录
     * @return void
     */
    static public function record($message,$level='INFO') {
        self::$log[$level][] =   "{$level}: {$message}";
    }

    /**
     * 获取内存中的日志信息
     * @access public
     * @param string $level  日志级别
     * @return array
     */
    static public function getLog($level=''){
        return $level?self::$log[$level]:self::$log;
    }

    /**
     * 日志保存
     * @access public
     * @param string $destination  写入目标
     * @param string $level 保存的日志级别
     * @return void
     */
    static public function save($destination='',$level='') {
        $log    =   $level?self::$log[$level]:self::$log;
        if(empty($log)) return ;
        $message    =   '';
        if($level) {
            $message    .=   implode("\r\n",$log);
            self::$log[$level]  =   [];
        }else{
            foreach($log as $info){
                $message    .=   implode("\r\n",$info)."\r\n";
            }
            self::$log = [];
        }
        self::$storage && self::$storage->write($message,$destination);
    }

    /**
     * 日志直接写入
     * @access public
     * @param string $log 日志信息
     * @param string $level  日志级别
     * @param string $destination  写入目标
     * @return void
     */
    static public function write($log,$level,$destination='') {
        self::$storage && self::$storage->write("{$level}: {$log}",$destination);
    }

}