<?php

/**
 * File from http://PrestaShow.pl
 *
 * DISCLAIMER
 * Do not edit or add to this file if you wish to upgrade this module to newer
 * versions in the future.
 *
 *  @authors     PrestaShow.pl <kontakt@prestashow.pl>
 *  @copyright   2015 PrestaShow.pl
 *  @license     http://PrestaShow.pl/license
 */
class PShow_Timer
{

    private $start = null;
    private $finish = null;
    private static $instance = null;

    public static function getInstance()
    {
        if (self::$instance === null) {
            self::$instance = new PShow_Timer();
        }
        return self::$instance;
    }

    public function getmicrotime()
    {
        list($usec, $sec) = explode(" ", microtime());
        return ((float) $usec + (float) $sec);
    }

    public function start()
    {
        $this->start = $this->getmicrotime();
        return $this;
    }

    public function finish()
    {
        $this->finish = $this->getmicrotime();
        return $this;
    }

    public function getElapsedTime($precision = false, $forcePrecisionLength = true)
    {
        if ($this->start === null) {
            return 0;
        }
        $time = $this->getmicrotime() - $this->start;

        if (is_numeric($precision)) {
            $time = round($time, $precision);
        }

        if ($forcePrecisionLength) {
            $adjustedLeadingZeros = 0 + mb_strlen('.') + $precision;
            return sprintf("%0" . $adjustedLeadingZeros . "." . $precision . "f", $time);
        }

        return $time;
    }
}