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<?php
/* 
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

if(!class_exists('SnapLibLogger')) {
class SnapLibLogger
{
    public static $logFilepath = null;
    static $logHandle          = null;

    public static function init($logFilepath)
    {
        self::$logFilepath = $logFilepath;
    }

    public static function clearLog()
    {
        if (file_exists(self::$logFilepath)) {
            if (self::$logHandle !== null) {
                fflush(self::$logHandle);
                fclose(self::$logHandle);
                self::$logHandle = null;
            }
            @unlink(self::$logFilepath);
        }
    }

    public static function logObject($s, $o, $flush = false)
    {
        self::log($s, $flush);
        self::log(print_r($o, true), $flush);
    }

    public static function log($s, $flush = false, $callingFunctionOverride = null)
    {
     //   echo "{$s}<br/>";
        $lfp = self::$logFilepath;
      //  echo "logging $s to {$lfp}<br/>";
        if (self::$logFilepath === null) {
            throw new Exception('Logging not initialized');
        }
        
        if(isset($_SERVER['REQUEST_TIME_FLOAT'])){
            $timepart = $_SERVER['REQUEST_TIME_FLOAT'];
        } else {
            $timepart = $_SERVER['REQUEST_TIME'];
        }

        $thread_id = sprintf("%08x", abs(crc32($_SERVER['REMOTE_ADDR'].$timepart.$_SERVER['REMOTE_PORT'])));

        $s = $thread_id.' '.date('h:i:s').":$s";

        if (self::$logHandle === null) {

            self::$logHandle = fopen(self::$logFilepath, 'a');
        }

        fwrite(self::$logHandle, "$s\n");

        if ($flush) {
            fflush(self::$logHandle);

            fclose(self::$logHandle);

            self::$logHandle = fopen(self::$logFilepath, 'a');
        }
    }

    private static $profileLogArray = null;
    private static $prevTS = -1;

    public static function initProfiling()
    {
        self::$profileLogArray = array();
    }

    public static function writeToPLog($s)
    {
        throw new exception('not implemented');
        $currentTime = microtime(true);

        if(array_key_exists($s, self::$profileLogArray))
        {
            $dSame = $currentTime - self::$profileLogArray[$s];
            $dSame = number_format($dSame, 7);
        }
        else
        {
            $dSame = 'N/A';
        }

        if(self::$prevTS != -1)
        {
            $dPrev = $currentTime - self::$prevTS;
            $dPrev = number_format($dPrev, 7);
        }
        else
        {
            $dPrev = 'N/A';
        }



        self::$profileLogArray[$s] = $currentTime;
        self::$prevTS = $currentTime;

        self::log("  {$dPrev}  :  {$dSame}  :  {$currentTime}  :     {$s}");
    }
}
}