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106 lines
3.7 KiB
PHP
Executable File
106 lines
3.7 KiB
PHP
Executable File
<?php
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/**************************************************************************\
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* eGroupWare - holidaycalc_US *
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* http://www.egroupware.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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{
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function add($holiday,&$holidays,$year,$day_offset=0)
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{
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if ($day_offset)
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{
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$holiday['name'] .= ' (Observed)';
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}
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$holiday['date'] = mktime(0,0,0,$holiday['month'],$holiday['day']+$day_offset,$year);
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foreach(array('day'=>'d','month'=>'m','occurence'=>'Y') as $key => $frmt)
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{
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$holiday[$key] = date($frmt,$holiday['date']);
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}
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$holiday['obervance_rule'] = 0;
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$holidays[]= $holiday;
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//echo "<p>holidaycalc::add(,,$year,,$day_offset)=".print_r($holiday,True)."</p>";
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}
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function calculate_date($holiday, &$holidays, $year)
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{
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//echo "<p>holidaycalc::calculate_date(".print_r($holiday,True).",,$year,)</p>";
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if($holiday['day'] == 0 && $holiday['occurence'] != 0)
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{
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if($holiday['occurence'] != 99)
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{
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$dow = $GLOBALS['phpgw']->datetime->day_of_week($year,$holiday['month'],1);
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$day = (((7 * $holiday['occurence']) - 6) + ((($holiday['dow'] + 7) - $dow) % 7));
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$day += ($day < 1 ? 7 : 0);
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// Sometimes the 5th occurance of a weekday (ie the 5th monday)
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// can spill over to the next month. This prevents that.
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$ld = $GLOBALS['phpgw']->datetime->days_in_month($holiday['month'],$year);
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if ($day > $ld)
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{
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return;
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}
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}
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else
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{
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$ld = $GLOBALS['phpgw']->datetime->days_in_month($holiday['month'],$year);
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$dow = $GLOBALS['phpgw']->datetime->day_of_week($year,$holiday['month'],$ld);
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$day = $ld - (($dow + 7) - $holiday['dow']) % 7 ;
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}
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}
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else
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{
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$day = $holiday['day'];
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if($holiday['observance_rule'] == True)
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{
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$dow = $GLOBALS['phpgw']->datetime->day_of_week($year,$holiday['month'],$day);
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// This now calulates Observed holidays and creates a new entry for them.
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// 0 = sundays are observed on monday (+1), 6 = saturdays are observed on fridays (-1)
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if($dow == 0 || $dow == 6)
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{
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$this->add($holiday,$holidays,$year,$dow == 0 ? 1 : -1);
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}
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if ($holiday['month'] == 1 && $day == 1)
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{
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$dow = $GLOBALS['phpgw']->datetime->day_of_week($year+1,$holiday['month'],$day);
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// checking if next year's newyear might be observed in this year
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if ($dow == 6)
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{
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$this->add($holiday,$holidays,$year+1,-1);
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}
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// add the next years newyear, to show it in a week- or month-view
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$this->add($holiday,$holidays,$year+1);
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}
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// checking if last year's new year's eve might be observed in this year
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if ($holiday['month'] == 12 && $day == 31)
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{
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$dow = $GLOBALS['phpgw']->datetime->day_of_week($year-1,$holiday['month'],$day);
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if ($dow == 0)
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{
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$this->add($holiday,$holidays,$year-1,1);
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}
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// add the last years new year's eve, to show it in a week- or month-view
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$this->add($holiday,$holidays,$year-1);
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}
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}
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}
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$date = mktime(0,0,0,$holiday['month'],$day,$year);
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return $date;
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}
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}
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?>
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