forked from extern/egroupware
106 lines
3.0 KiB
PHP
106 lines
3.0 KiB
PHP
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<?php
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/**************************************************************************\
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* phpGroupWare - holidaycalc_JP *
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* http://www.phpgroupware.org *
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* Based on Yoshihiro Kamimura <your@itheart.com> *
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* http://www.itheart.com *
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* -------------------------------------------- *
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* This program is free software; you can redistribute it and/or modify it *
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* under the terms of the GNU General Public License as published by the *
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* Free Software Foundation; either version 2 of the License, or (at your *
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* option) any later version. *
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\**************************************************************************/
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/* $Id$ */
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class holidaycalc {
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function calculate_date($holiday, &$holidays, $year, $datetime, &$i)
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{
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if($holiday['day'] == 0 && $holiday['dow'] != 0 && $holiday['occurence'] != 0)
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{
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// for Coming of Age Day and Health and Sports Day
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// Happy monday law.
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if ($year >= 2000)
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{
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$dow = $datetime->day_of_week($year, $holiday['month'], 1);
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$dayshift = (($holiday['dow'] + 7) - $dow) % 7;
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$day = ($holiday['occurence'] - 1) * 7 + $dayshift + 1;
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}
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else
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{
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// non Happy monday law.
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if ($holiday['month'] == 1)
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{
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$day = 15;
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}
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elseif ($holiday['month'] == 10)
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{
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$day = 10;
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}
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}
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}
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elseif ($holiday['day'] == 0 && $holiday['dow'] == 0 && $holiday['occurence'] == 0)
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{
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// For the next generation.
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// over 2151, please set $factor...
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if ($holiday['month'] == 3)
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{
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// for Vernal Equinox
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if ($year >= 1980 && $year <= 2099)
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{
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$factor = 20.8431;
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}
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elseif ($year >= 2100 && $year <= 2150)
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{
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$factor = 21.851;
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}
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}
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elseif ($holiday['month'] == 9)
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{
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// for Autumnal Equinox
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if ($year >= 1980 && $year <= 2099)
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{
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$factor = 23.2488;
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}
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elseif ($year >= 2100 && $year <= 2150)
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{
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$factor = 24.2488;
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}
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}
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$day = (int)($factor + 0.242194 * ($year - 1980)
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- (int)(($year - 1980) / 4));
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}
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else
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{
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// normal holiday
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$day = $holiday['day'];
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}
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if($holiday['observance_rule'] == True)
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{
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$dow = $datetime->day_of_week($year,$holiday['month'],$day);
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// This now calulates Observed holidays and creates a new entry for them.
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if($dow == 0)
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{
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$i++;
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$holidays[$i]['locale'] = $holiday['locale'].' (Observed)';
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$holidays[$i]['name'] = lang('overlap holiday');
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$holidays[$i]['day'] = $holiday['day'] + 1;
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$holidays[$i]['month'] = $holiday['month'];
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$holidays[$i]['occurence'] = $holiday['occurence'];
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$holidays[$i]['dow'] = $holiday['dow'];
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$holidays[$i]['date'] = mktime(0,0,0,$holiday['month'],$day+1,$year) - $datetime->tz_offset;
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$holidays[$i]['obervance_rule'] = 0;
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}
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}
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$date = mktime(0,0,0,$holiday['month'],$day,$year) - $datetime->tz_offset;
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return $date;
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}
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}
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?>
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