1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
<?php
/**
* DateTimeParser
*
* This class is responsible for parsing the several different date and time
* formats iCalendar and vCards have.
*
* @package Sabre
* @subpackage VObject
* @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
* @author Evert Pot (http://www.rooftopsolutions.nl/)
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
class Sabre_VObject_DateTimeParser {
/**
* Parses an iCalendar (rfc5545) formatted datetime and returns a DateTime object
*
* Specifying a reference timezone is optional. It will only be used
* if the non-UTC format is used. The argument is used as a reference, the
* returned DateTime object will still be in the UTC timezone.
*
* @param string $dt
* @param DateTimeZone $tz
* @return DateTime
*/
static public function parseDateTime($dt,DateTimeZone $tz = null) {
// Format is YYYYMMDD + "T" + hhmmss
$result = preg_match('/^([1-3][0-9]{3})([0-1][0-9])([0-3][0-9])T([0-2][0-9])([0-5][0-9])([0-5][0-9])([Z]?)$/',$dt,$matches);
if (!$result) {
throw new Sabre_DAV_Exception_BadRequest('The supplied iCalendar datetime value is incorrect: ' . $dt);
}
if ($matches[7]==='Z' || is_null($tz)) {
$tz = new DateTimeZone('UTC');
}
$date = new DateTime($matches[1] . '-' . $matches[2] . '-' . $matches[3] . ' ' . $matches[4] . ':' . $matches[5] .':' . $matches[6], $tz);
// Still resetting the timezone, to normalize everything to UTC
$date->setTimeZone(new DateTimeZone('UTC'));
return $date;
}
/**
* Parses an iCalendar (rfc5545) formatted date and returns a DateTime object
*
* @param string $date
* @return DateTime
*/
static public function parseDate($date) {
// Format is YYYYMMDD
$result = preg_match('/^([1-3][0-9]{3})([0-1][0-9])([0-3][0-9])$/',$date,$matches);
if (!$result) {
throw new Sabre_DAV_Exception_BadRequest('The supplied iCalendar date value is incorrect: ' . $date);
}
$date = new DateTime($matches[1] . '-' . $matches[2] . '-' . $matches[3], new DateTimeZone('UTC'));
return $date;
}
/**
* Parses an iCalendar (RFC5545) formatted duration value.
*
* This method will either return a DateTimeInterval object, or a string
* suitable for strtotime or DateTime::modify.
*
* @param string $duration
* @param bool $asString
* @return DateInterval|string
*/
static public function parseDuration($duration, $asString = false) {
$result = preg_match('/^(?P<plusminus>\+|-)?P((?P<week>\d+)W)?((?P<day>\d+)D)?(T((?P<hour>\d+)H)?((?P<minute>\d+)M)?((?P<second>\d+)S)?)?$/', $duration, $matches);
if (!$result) {
throw new Sabre_DAV_Exception_BadRequest('The supplied iCalendar duration value is incorrect: ' . $duration);
}
if (!$asString) {
$invert = false;
if ($matches['plusminus']==='-') {
$invert = true;
}
$parts = array(
'week',
'day',
'hour',
'minute',
'second',
);
foreach($parts as $part) {
$matches[$part] = isset($matches[$part])&&$matches[$part]?(int)$matches[$part]:0;
}
// We need to re-construct the $duration string, because weeks and
// days are not supported by DateInterval in the same string.
$duration = 'P';
$days = $matches['day'];
if ($matches['week']) {
$days+=$matches['week']*7;
}
if ($days)
$duration.=$days . 'D';
if ($matches['minute'] || $matches['second'] || $matches['hour']) {
$duration.='T';
if ($matches['hour'])
$duration.=$matches['hour'].'H';
if ($matches['minute'])
$duration.=$matches['minute'].'M';
if ($matches['second'])
$duration.=$matches['second'].'S';
}
$iv = new DateInterval($duration);
if ($invert) $iv->invert = true;
return $iv;
}
$parts = array(
'week',
'day',
'hour',
'minute',
'second',
);
$newDur = '';
foreach($parts as $part) {
if (isset($matches[$part]) && $matches[$part]) {
$newDur.=' '.$matches[$part] . ' ' . $part . 's';
}
}
$newDur = ($matches['plusminus']==='-'?'-':'+') . trim($newDur);
return $newDur;
}
/**
* Parses either a Date or DateTime, or Duration value.
*
* @param string $date
* @param DateTimeZone|string $referenceTZ
* @return DateTime|DateInterval
*/
static public function parse($date, $referenceTZ = null) {
if ($date[0]==='P' || ($date[0]==='-' && $date[1]==='P')) {
return self::parseDuration($date);
} elseif (strlen($date)===8) {
return self::parseDate($date);
} else {
return self::parseDateTime($date, $referenceTZ);
}
}
}
|
