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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Bart Visscher <bartv@thisnet.nl>
* @author Bernhard Reiter <ockham@raz.or.at>
* @author Björn Schießle <bjoern@schiessle.org>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Joas Schilling <coding@schilljs.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Sebastian Döll <sebastian.doell@libasys.de>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <vincent@nextcloud.com>
* @author Volkan Gezer <volkangezer@gmail.com>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Share;
use OCA\Files_Sharing\ShareBackend\File;
use Psr\Log\LoggerInterface;
/**
* This class provides the ability for apps to share their content between users.
* Apps must create a backend class that implements OCP\Share_Backend and register it with this class.
*
* It provides the following hooks:
* - post_shared
*/
class Share extends Constants {
/** CRUDS permissions (Create, Read, Update, Delete, Share) using a bitmask
* Construct permissions for share() and setPermissions with Or (|) e.g.
* Give user read and update permissions: PERMISSION_READ | PERMISSION_UPDATE
*
* Check if permission is granted with And (&) e.g. Check if delete is
* granted: if ($permissions & PERMISSION_DELETE)
*
* Remove permissions with And (&) and Not (~) e.g. Remove the update
* permission: $permissions &= ~PERMISSION_UPDATE
*
* Apps are required to handle permissions on their own, this class only
* stores and manages the permissions of shares
*
* @see lib/public/Constants.php
*/
/**
* Register a sharing backend class that implements OCP\Share_Backend for an item type
*
* @param string $itemType Item type
* @param string $class Backend class
* @param string $collectionOf (optional) Depends on item type
* @param array $supportedFileExtensions (optional) List of supported file extensions if this item type depends on files
* @return boolean true if backend is registered or false if error
*/
public static function registerBackend($itemType, $class, $collectionOf = null, $supportedFileExtensions = null) {
if (\OC::$server->getConfig()->getAppValue('core', 'shareapi_enabled', 'yes') == 'yes') {
if (!isset(self::$backendTypes[$itemType])) {
self::$backendTypes[$itemType] = [
'class' => $class,
'collectionOf' => $collectionOf,
'supportedFileExtensions' => $supportedFileExtensions
];
return true;
}
\OC::$server->get(LoggerInterface::class)->warning(
'Sharing backend '.$class.' not registered, '.self::$backendTypes[$itemType]['class']
.' is already registered for '.$itemType,
['app' => 'files_sharing']);
}
return false;
}
/**
* Get the backend class for the specified item type
*
* @param string $itemType
* @return \OCP\Share_Backend
* @throws \Exception
*/
public static function getBackend($itemType) {
$l = \OCP\Util::getL10N('lib');
$logger = \OCP\Server::get(LoggerInterface::class);
if (isset(self::$backends[$itemType])) {
return self::$backends[$itemType];
} elseif (isset(self::$backendTypes[$itemType]['class'])) {
$class = self::$backendTypes[$itemType]['class'];
if (class_exists($class)) {
self::$backends[$itemType] = new $class;
if (!(self::$backends[$itemType] instanceof \OCP\Share_Backend)) {
$message = 'Sharing backend %s must implement the interface OCP\Share_Backend';
$message_t = $l->t('Sharing backend %s must implement the interface OCP\Share_Backend', [$class]);
$logger->error(sprintf($message, $class), ['app' => 'OCP\Share']);
throw new \Exception($message_t);
}
return self::$backends[$itemType];
} else {
$message = 'Sharing backend %s not found';
$message_t = $l->t('Sharing backend %s not found', [$class]);
$logger->error(sprintf($message, $class), ['app' => 'OCP\Share']);
throw new \Exception($message_t);
}
}
$message = 'Sharing backend for %s not found';
$message_t = $l->t('Sharing backend for %s not found', [$itemType]);
$logger->error(sprintf($message, $itemType), ['app' => 'OCP\Share']);
throw new \Exception($message_t);
}
/**
* Check if resharing is allowed
*
* @return boolean true if allowed or false
*
* Resharing is allowed by default if not configured
*/
public static function isResharingAllowed() {
if (!isset(self::$isResharingAllowed)) {
if (\OC::$server->getConfig()->getAppValue('core', 'shareapi_allow_resharing', 'yes') == 'yes') {
self::$isResharingAllowed = true;
} else {
self::$isResharingAllowed = false;
}
}
return self::$isResharingAllowed;
}
/**
* group items with link to the same source
*
* @param array $items
* @param string $itemType
* @return array of grouped items
*/
protected static function groupItems($items, $itemType) {
$fileSharing = $itemType === 'file' || $itemType === 'folder';
$result = [];
foreach ($items as $item) {
$grouped = false;
foreach ($result as $key => $r) {
// for file/folder shares we need to compare file_source, otherwise we compare item_source
// only group shares if they already point to the same target, otherwise the file where shared
// before grouping of shares was added. In this case we don't group them to avoid confusions
if (($fileSharing && $item['file_source'] === $r['file_source'] && $item['file_target'] === $r['file_target']) ||
(!$fileSharing && $item['item_source'] === $r['item_source'] && $item['item_target'] === $r['item_target'])) {
// add the first item to the list of grouped shares
if (!isset($result[$key]['grouped'])) {
$result[$key]['grouped'][] = $result[$key];
}
$result[$key]['permissions'] = (int)$item['permissions'] | (int)$r['permissions'];
$result[$key]['grouped'][] = $item;
$grouped = true;
break;
}
}
if (!$grouped) {
$result[] = $item;
}
}
return $result;
}
/**
* remove protocol from URL
*
* @param string $url
* @return string
*/
public static function removeProtocolFromUrl($url) {
if (str_starts_with($url, 'https://')) {
return substr($url, strlen('https://'));
} elseif (str_starts_with($url, 'http://')) {
return substr($url, strlen('http://'));
}
return $url;
}
/**
* @return int
*/
public static function getExpireInterval() {
return (int)\OC::$server->getConfig()->getAppValue('core', 'shareapi_expire_after_n_days', '7');
}
}
|
