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comparison plugins/libcalendaring/lib/Sabre/VObject/Splitter/ICalendar.php @ 4:888e774ee983

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libcalendar plugin as distributed
author Charlie Root
date Sat, 13 Jan 2018 08:57:56 -0500
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3:f6fe4b6ae66a 4:888e774ee983
1 <?php
2
3 namespace Sabre\VObject\Splitter;
4
5 use Sabre\VObject;
6
7 /**
8 * Splitter
9 *
10 * This class is responsible for splitting up iCalendar objects.
11 *
12 * This class expects a single VCALENDAR object with one or more
13 * calendar-objects inside. Objects with identical UID's will be combined into
14 * a single object.
15 *
16 * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
17 * @author Dominik Tobschall
18 * @author Armin Hackmann
19 * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
20 */
21 class ICalendar implements SplitterInterface {
22
23 /**
24 * Timezones
25 *
26 * @var array
27 */
28 protected $vtimezones = array();
29
30 /**
31 * iCalendar objects
32 *
33 * @var array
34 */
35 protected $objects = array();
36
37 /**
38 * Constructor
39 *
40 * The splitter should receive an readable file stream as it's input.
41 *
42 * @param resource $input
43 */
44 public function __construct($input) {
45
46 $data = VObject\Reader::read(stream_get_contents($input));
47 $vtimezones = array();
48 $components = array();
49
50 foreach($data->children as $component) {
51 if (!$component instanceof VObject\Component) {
52 continue;
53 }
54
55 // Get all timezones
56 if ($component->name === 'VTIMEZONE') {
57 $this->vtimezones[(string)$component->TZID] = $component;
58 continue;
59 }
60
61 // Get component UID for recurring Events search
62 if($component->UID) {
63 $uid = (string)$component->UID;
64 } else {
65 // Generating a random UID
66 $uid = sha1(microtime()) . '-vobjectimport';
67 }
68
69 // Take care of recurring events
70 if (!array_key_exists($uid, $this->objects)) {
71 $this->objects[$uid] = VObject\Component::create('VCALENDAR');
72 }
73
74 $this->objects[$uid]->add(clone $component);
75 }
76
77 }
78
79 /**
80 * Every time getNext() is called, a new object will be parsed, until we
81 * hit the end of the stream.
82 *
83 * When the end is reached, null will be returned.
84 *
85 * @return Sabre\VObject\Component|null
86 */
87 public function getNext() {
88
89 if($object=array_shift($this->objects)) {
90
91 // create our baseobject
92 $object->version = '2.0';
93 $object->prodid = '-//Sabre//Sabre VObject ' . VObject\Version::VERSION . '//EN';
94 $object->calscale = 'GREGORIAN';
95
96 // add vtimezone information to obj (if we have it)
97 foreach ($this->vtimezones as $vtimezone) {
98 $object->add($vtimezone);
99 }
100
101 return $object;
102
103 } else {
104
105 return null;
106
107 }
108
109 }
110
111 }