<?php

/* *
* Log 			A logger class which creates logs when an exception is thrown.
* @author		Author: Vivek Wicky Aswal. (https://twitter.com/#!/VivekWickyAswal)
* @git 			https://github.com/indieteq/PHP-MySQL-PDO-Database-Class
* @version      0.1a
*/

class Switchlog {
    # @string, Log directory name
    private $path = 'runtime/';
    /**
     * 设置记录日志标志
     *
     * @param $bLogFlag ： true - 记录； 其他 - 不记录
     */
    private $bLogFlag = false;

    # @void, Default Constructor, Sets the timezone and path of the log files.
    public function __construct($bLogFlag = false) {
        date_default_timezone_set('Asia/Shanghai');
        $this->path = SITE_PATH.'sdk/runtime/';
        $this->bLogFlag = $bLogFlag;
    }

    /**
     * @void
     *    Creates the log
     *
     * @param string $message the message which is written into the log.
     *
     * @description:
     *             1. Checks if directory exists, if not, create one and call this method again.
     *             2. Checks if log already exists.
     *             3. If not, new log gets created. Log is written into the logs folder.
     *             4. Logname is current date(Year - Month - Day).
     *             5. If log exists, edit method called.
     *             6. Edit method modifies the current log.
     */
    public function write($message, $logname = '') {
        //false不记录
        if ($this->bLogFlag == false) {
            return;
        }
        $date = new DateTime();
        if (empty($logname)) {
            $logname = 'db';
        }
        $log = $this->path.$logname.'/'.$date->format('Y-m-d').".txt";
        if (is_dir($this->path.$logname.'/')) {
            if (!file_exists($log)) {
                $fh = fopen($log, 'a+') or die("Fatal Error !");
                $logcontent = "Time : ".$date->format('H:i:s')."\r\n".$message."\r\n";
                fwrite($fh, $logcontent);
                fclose($fh);
            } else {
                $this->edit($log, $date, $message);
            }
        } else {
            if (mkdir($this->path.$logname.'/', 0777) === true) {
                $this->write($message, $logname);
            }
        }
    }

    /**
     * @void
     *  Gets called if log exists.
     *  Modifies current log and adds the message to the log.
     *
     * @param string         $log
     * @param DateTimeObject $date
     * @param string         $message
     */
    private function edit($log, $date, $message) {
        $logcontent = "Time : ".$date->format('H:i:s')."\r\n".$message."\r\n\r\n";
        $logcontent = $logcontent.file_get_contents($log);
        file_put_contents($log, $logcontent);
    }
}

?>