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
|
<?php
namespace Sabre\CalDAV;
use Sabre\DAV;
use Sabre\VObject;
/**
* ICS Exporter
*
* This plugin adds the ability to export entire calendars as .ics files.
* This is useful for clients that don't support CalDAV yet. They often do
* support ics files.
*
* @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
class ICSExportPlugin extends DAV\ServerPlugin {
/**
* Reference to Server class
*
* @var \Sabre\DAV\Server
*/
protected $server;
/**
* Initializes the plugin and registers event handlers
*
* @param \Sabre\DAV\Server $server
* @return void
*/
public function initialize(DAV\Server $server) {
$this->server = $server;
$this->server->subscribeEvent('beforeMethod',array($this,'beforeMethod'), 90);
}
/**
* 'beforeMethod' event handles. This event handles intercepts GET requests ending
* with ?export
*
* @param string $method
* @param string $uri
* @return bool
*/
public function beforeMethod($method, $uri) {
if ($method!='GET') return;
if ($this->server->httpRequest->getQueryString()!='export') return;
// splitting uri
list($uri) = explode('?',$uri,2);
$node = $this->server->tree->getNodeForPath($uri);
if (!($node instanceof Calendar)) return;
// Checking ACL, if available.
if ($aclPlugin = $this->server->getPlugin('acl')) {
$aclPlugin->checkPrivileges($uri, '{DAV:}read');
}
$this->server->httpResponse->setHeader('Content-Type','text/calendar');
$this->server->httpResponse->sendStatus(200);
$nodes = $this->server->getPropertiesForPath($uri, array(
'{' . Plugin::NS_CALDAV . '}calendar-data',
),1);
$this->server->httpResponse->sendBody($this->generateICS($nodes));
// Returning false to break the event chain
return false;
}
/**
* Merges all calendar objects, and builds one big ics export
*
* @param array $nodes
* @return string
*/
public function generateICS(array $nodes) {
$calendar = new VObject\Component\VCalendar();
$calendar->version = '2.0';
if (DAV\Server::$exposeVersion) {
$calendar->prodid = '-//SabreDAV//SabreDAV ' . DAV\Version::VERSION . '//EN';
} else {
$calendar->prodid = '-//SabreDAV//SabreDAV//EN';
}
$calendar->calscale = 'GREGORIAN';
$collectedTimezones = array();
$timezones = array();
$objects = array();
foreach($nodes as $node) {
if (!isset($node[200]['{' . Plugin::NS_CALDAV . '}calendar-data'])) {
continue;
}
$nodeData = $node[200]['{' . Plugin::NS_CALDAV . '}calendar-data'];
$nodeComp = VObject\Reader::read($nodeData);
foreach($nodeComp->children() as $child) {
switch($child->name) {
case 'VEVENT' :
case 'VTODO' :
case 'VJOURNAL' :
$objects[] = $child;
break;
// VTIMEZONE is special, because we need to filter out the duplicates
case 'VTIMEZONE' :
// Naively just checking tzid.
if (in_array((string)$child->TZID, $collectedTimezones)) continue;
$timezones[] = $child;
$collectedTimezones[] = $child->TZID;
break;
}
}
}
foreach($timezones as $tz) $calendar->add($tz);
foreach($objects as $obj) $calendar->add($obj);
return $calendar->serialize();
}
}
|
