1: <?php
 2: 
 3: /**
 4:  * Jyxo PHP Library
 5:  *
 6:  * LICENSE
 7:  *
 8:  * This source file is subject to the new BSD license that is bundled
 9:  * with this package in the file license.txt.
10:  * It is also available through the world-wide-web at this URL:
11:  * https://github.com/jyxo/php/blob/master/license.txt
12:  */
13: 
14: /**
15:  * Various utilities for working with date/time.
16:  *
17:  * @category Jyxo
18:  * @package Jyxo_Time
19:  * @copyright Copyright (c) 2005-2011 Jyxo, s.r.o.
20:  * @license https://github.com/jyxo/php/blob/master/license.txt
21:  * @author Jakub Tománek
22:  */
23: class Jyxo_Time_Util
24: {
25:     /**
26:      * List of Czech public holidays.
27:      *
28:      * @var array
29:      */
30:     private static $holidays = array(
31:         '1.1',
32:         '1.5',
33:         '8.5',
34:         '5.7',
35:         '6.7',
36:         '28.9',
37:         '28.10',
38:         '17.11',
39:         '24.12',
40:         '25.12',
41:         '26.12'
42:     );
43: 
44:     /**
45:      * Returns the next month.
46:      *
47:      * If the current date is greater than the next month's number of days, returns the next month's last date.
48:      * This is different from strtotime('+1 month') behaviour, where August 31st returns October 1st.
49:      *
50:      * @param integer $now Current date/time
51:      * @return Jyxo_Time_Time
52:      */
53:     public static function nextMonth(Jyxo_Time_Time $now = null)
54:     {
55:         $now = $now ? $now->unix : time();
56: 
57:         $nextMonth = date('n', $now) + 1;
58:         $thisYear = date('Y', $now);
59:         // Actual date vs. next month's number of days
60:         $day = min(date('j', $now), date('t', mktime(0, 0, 0, $nextMonth, 1, $thisYear)));
61: 
62:         // Create the date
63:         $date = mktime(date('H', $now), date('i', $now), date('s', $now), $nextMonth, $day, $thisYear);
64:         return new Jyxo_Time_Time($date);
65:     }
66: 
67:     /**
68:      * Checks if the given date is a working day.
69:      *
70:      * @param Jyxo_Time_Time $day Date to be checked
71:      * @return boolean
72:      */
73:     public static function isWorkDay(Jyxo_Time_Time $day)
74:     {
75:         $holidays = self::$holidays;
76: 
77:         // Adds Easter Monday. easter_date is supposed to be buggy http://cz.php.net/manual/en/function.easter-date.php#80664
78:         $year = (int) $day->format('Y');
79:         $days = easter_days($year);
80:         // $days returns the number of days from March 21st until the Easter Sunday, +1 because of Monday
81:         $holidays[] = date('j.n', strtotime($year . '-03-21 +' . ($days + 1) . ' days'));
82: 
83:         $isWorkDay = true;
84: 
85:         if ($day->format('N') > 5) {
86:             // Saturday or Sunday
87:             $isWorkDay = false;
88:         } elseif (in_array($day->format('j.n'), $holidays)) {
89:             // Public holiday, hurray!
90:             $isWorkDay = false;
91:         }
92: 
93:         return $isWorkDay;
94:     }
95: }
96: