<?php
namespace WORKERMAN\Core\Lib;
/**
 * 
 * 日志类
 * 
* @author walkor <worker-man@qq.com>
 */
class Log 
{
    /**
     * 能捕获的错误抛出的异常的错误码
     * @var int
     */
    const CATCHABLE_ERROR = 505;
    
    /**
     * 初始化
     * @return bool
     */
    public static function init()
    {
        set_error_handler(array('\WORKERMAN\Core\Lib\Log', 'errHandle'), E_RECOVERABLE_ERROR | E_USER_ERROR);
        return self::checkWriteable();
    }
    
    /**
     * 检查log目录是否可写
     * @return bool
     */
    public static function checkWriteable()
    {
        $ok = true;
        if(!is_dir(WORKERMAN_LOG_DIR))
        {
            // 检查log目录是否可读
            umask(0);
            if(@mkdir(WORKERMAN_LOG_DIR, 0777) === false)
            {
                $ok = false;
            }
            @chmod(WORKERMAN_LOG_DIR, 0777);
        }
        
        if(!is_readable(WORKERMAN_LOG_DIR) || !is_writeable(WORKERMAN_LOG_DIR))
        {
            $ok = false;
        }
        
        if(!$ok)
        {
            $pad_length = 26;
            Master::notice(WORKERMAN_LOG_DIR." Need to have read and write permissions\tServer start fail");
            exit("------------------------LOG------------------------\n".str_pad(WORKERMAN_LOG_DIR, $pad_length) . "\033[31;40m [NOT READABLE/WRITEABLE] \033[0m\n\n\033[31;40mDirectory ".WORKERMAN_LOG_DIR." Need to have read and write permissions\033[0m\n\n\033[31;40mServer start fail\033[0m\n\n");
        }
    }
    
    /**
     * 添加日志
     * @param string $msg
     * @return void
     */
    public static function add($msg)
    {
        $log_dir = WORKERMAN_LOG_DIR. '/'.date('Y-m-d');
        umask(0);
        // 没有log目录创建log目录
        if(!is_dir($log_dir))
        {
            mkdir($log_dir,  0777, true);
        }
        if(!is_readable($log_dir))
        {
            return false;
        }
        
        $log_file = $log_dir . "/server.log";
        file_put_contents($log_file, date('Y-m-d H:i:s') . " " . $msg . "\n", FILE_APPEND);
    }
    
    /**
     * 错误日志捕捉函数
     * @param int $errno
     * @param string $errstr
     * @param string $errfile
     * @param int $errline
     * @return false
     */
    public static function errHandle($errno, $errstr, $errfile, $errline)
    {
        $err_type_map = array(
           E_RECOVERABLE_ERROR => 'E_RECOVERABLE_ERROR',
           E_USER_ERROR        => 'E_USER_ERROR',
        );
        
        switch ($errno) 
        {
            case E_RECOVERABLE_ERROR:
            case E_USER_ERROR:
                $msg = "{$err_type_map[$errno]} $errstr";
                self::add($msg);
                //trigger_error($errstr);
                throw new \Exception($msg, self::CATCHABLE_ERROR);
                break;
            default :
                return false;
        }
    }
    
}