<?php
/**
 *------------------------------------------------------------------------------
 *  iC Library - Library by Jooml!C, for Joomla!
 *------------------------------------------------------------------------------
 * @package     iC Library
 * @subpackage  Globalize
 *
 * @version     1.3.2 2015-08-12
 * @since       1.3.2
 *
 * Original Jalali to Gregorian (and vice versa) convertor:
 * Copyright (C)2000 Roozbeh Pournader and Mohammad Toossi
 *
 * @method gregorian_to_jalali ($g_y, $g_m, $g_d,$str)       return gregorian to jalali converted date
 * @method jalali_to_gregorian($j_y, $j_m, $j_d,$str)        return jalali to gregorian converted date
 *
 * @author     Roozbeh Baabakaan
 * @license    http://opensource.org/licenses/mit-license.php The MIT License
 * @link       https://github.com/roozbeh360/Gregorian-Jalali-Date-Convertor
 * version     SVN: $Id: gregorian_jalali 1 2012-12-20 19:07:0
 *
 * The MIT License (MIT)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * 1- The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * 2- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 *------------------------------------------------------------------------------
*/

// No direct access to this file
defined('_JEXEC') or die();

/**
 * class iCGlobalizeConvert
 */
class iCGlobalizeConvert
{
	/**
	 * Function to process division
	 *
	 * @since   1.3.2
	 */
	static public function div($a, $b)
	{
    	return (int) ($a / $b);
	}


    /**
     * Gregorian to Jalali Conversion
     * Copyright (C) 2000  Roozbeh Pournader and Mohammad Toossi
     *
     * @since 1.3.2
     */
	static public function gregorianToJalali($g_y, $g_m, $g_d, $str)
	{
		$g_days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
		$j_days_in_month = array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29);

  		$gy = $g_y-1600;
		$gm = $g_m-1;
		$gd = $g_d-1;

		$g_day_no = 365*$gy+self::div($gy+3,4)-self::div($gy+99,100)+self::div($gy+399,400);

		for ($i=0; $i < $gm; ++$i)
			$g_day_no += $g_days_in_month[$i];
		if ($gm>1 && (($gy%4==0 && $gy%100!=0) || ($gy%400==0)))
		/* leap and after Feb */
		$g_day_no++;
		$g_day_no += $gd;

		$j_day_no = $g_day_no-79;

		$j_np = self::div($j_day_no, 12053); /* 12053 = 365*33 + 32/4 */
		$j_day_no = $j_day_no % 12053;

		$jy = 979+33*$j_np+4*self::div($j_day_no,1461); /* 1461 = 365*4 + 4/4 */

		$j_day_no %= 1461;

		if ($j_day_no >= 366)
		{
			$jy += self::div($j_day_no-1, 365);
			$j_day_no = ($j_day_no-1)%365;
		}

		for ($i = 0; $i < 11 && $j_day_no >= $j_days_in_month[$i]; ++$i)
			$j_day_no -= $j_days_in_month[$i];
		$jm = $i+1;
		$jd = $j_day_no+1;

		if ($str)
		{
			return $jy . '-' . $jm . '-' . $jd;
		}

		return array($jy, $jm, $jd);
	}

    /**
     * Jalali to Gregorian Conversion
     * Copyright (C) 2000  Roozbeh Pournader and Mohammad Toossi
     *
     * @since 1.3.2
     */
	static public function jalaliToGregorian($j_y, $j_m, $j_d, $str)
	{
		$g_days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
		$j_days_in_month = array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29);

		$jy = (int)($j_y)-979;
		$jm = (int)($j_m)-1;
		$jd = (int)($j_d)-1;

		$j_day_no = 365*$jy + self::div($jy, 33)*8 + self::div($jy%33+3, 4);

		for ($i=0; $i < $jm; ++$i)
			$j_day_no += $j_days_in_month[$i];

		$j_day_no += $jd;

		$g_day_no = $j_day_no+79;

		$gy = 1600 + 400*self::div($g_day_no, 146097); /* 146097 = 365*400 + 400/4 - 400/100 + 400/400 */
		$g_day_no = $g_day_no % 146097;

        $leap = true;

		if ($g_day_no >= 36525) /* 36525 = 365*100 + 100/4 */
		{
			$g_day_no--;
			$gy += 100*self::div($g_day_no,  36524); /* 36524 = 365*100 + 100/4 - 100/100 */
			$g_day_no = $g_day_no % 36524;

			if ($g_day_no >= 365)
				$g_day_no++;
			else
				$leap = false;
		}

		$gy += 4*self::div($g_day_no, 1461); /* 1461 = 365*4 + 4/4 */
		$g_day_no %= 1461;

		if ($g_day_no >= 366)
		{
			$leap = false;

			$g_day_no--;
			$gy += self::div($g_day_no, 365);
			$g_day_no = $g_day_no % 365;
		}

		for ($i = 0; $g_day_no >= $g_days_in_month[$i] + ($i == 1 && $leap); $i++)
			$g_day_no -= $g_days_in_month[$i] + ($i == 1 && $leap);
		$gm = $i+1;
		$gd = $g_day_no+1;

		if ($str)
		{
			return $gy . '-' . $gm . '-' . $gd;
		}

		return array($gy, $gm, $gd);
	}


	function comparedate($_date_mix_jalaly, $_date_mix_gregorian)
	{
		$_date_arr_jalaly = explode('/', $_date_mix_jalaly);
		$_date_arr_gregorian = explode('/', $_date_mix_gregorian);

		$arr_jtg = self::jalali_to_gregorian($_date_arr_jalaly[0],$_date_arr_jalaly[1],$_date_arr_jalaly[2]);

		if ($_date_arr_gregorian[0]> $arr_jtg[0])
		{
			return  false;
		}
		elseif ($_date_arr_gregorian[0]== $arr_jtg[0] && $_date_arr_gregorian[1]>$arr_jtg[1])
		{
			return false;
		}
		elseif ($_date_arr_gregorian[0]== $arr_jtg[0] && $_date_arr_gregorian[1]==$arr_jtg[1] && $_date_arr_gregorian[2]>$arr_jtg[2])
		{
			return false;
		}

		return true ;
	}