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: namespace Jyxo\Time;
15: 
16: /**
17:  * Various utilities for working with date/time.
18:  *
19:  * @category Jyxo
20:  * @package Jyxo\Time
21:  * @copyright Copyright (c) 2005-2011 Jyxo, s.r.o.
22:  * @license https://github.com/jyxo/php/blob/master/license.txt
23:  * @author Jakub Tománek
24:  */
25: class Util
26: {
27:     /**
28:      * List of Czech public holidays.
29:      *
30:      * @var array
31:      */
32:     private static $holidays = array(
33:         '1.1',
34:         '1.5',
35:         '8.5',
36:         '5.7',
37:         '6.7',
38:         '28.9',
39:         '28.10',
40:         '17.11',
41:         '24.12',
42:         '25.12',
43:         '26.12'
44:     );
45: 
46:     /**
47:      * Returns the next month.
48:      *
49:      * If the current date is greater than the next month's number of days, returns the next month's last date.
50:      * This is different from strtotime('+1 month') behaviour, where August 31st returns October 1st.
51:      *
52:      * @param integer $now Current date/time
53:      * @return \Jyxo\Time\Time
54:      */
55:     public static function nextMonth(\Jyxo\Time\Time $now = null)
56:     {
57:         $now = $now ? $now->unix : time();
58: 
59:         $nextMonth = date('n', $now) + 1;
60:         $thisYear = date('Y', $now);
61:         // Actual date vs. next month's number of days
62:         $day = min(date('j', $now), date('t', mktime(0, 0, 0, $nextMonth, 1, $thisYear)));
63: 
64:         // Create the date
65:         $date = mktime(date('H', $now), date('i', $now), date('s', $now), $nextMonth, $day, $thisYear);
66:         return new Time($date);
67:     }
68: 
69:     /**
70:      * Checks if the given date is a working day.
71:      *
72:      * @param \Jyxo\Time\Time $day Date to be checked
73:      * @return boolean
74:      */
75:     public static function isWorkDay(\Jyxo\Time\Time $day)
76:     {
77:         $holidays = self::$holidays;
78: 
79:         // Adds Easter Monday. easter_date is supposed to be buggy http://cz.php.net/manual/en/function.easter-date.php#80664
80:         $year = (int) $day->format('Y');
81:         $days = easter_days($year);
82:         // $days returns the number of days from March 21st until the Easter Sunday, +1 because of Monday
83:         $holidays[] = date('j.n', strtotime($year . '-03-21 +' . ($days + 1) . ' days'));
84: 
85:         $isWorkDay = true;
86: 
87:         if ($day->format('N') > 5) {
88:             // Saturday or Sunday
89:             $isWorkDay = false;
90:         } elseif (in_array($day->format('j.n'), $holidays)) {
91:             // Public holiday, hurray!
92:             $isWorkDay = false;
93:         }
94: 
95:         return $isWorkDay;
96:     }
97: }
98: