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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Joas Schilling <coding@schilljs.com>
* @author Maxence Lange <maxence@nextcloud.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Vincent Petry <pvince81@owncloud.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 OCA\Files_Sharing;
use OC\Cache\CappedMemoryCache;
use OC\Files\View;
use OCP\Files\Config\IMountProvider;
use OCP\Files\Storage\IStorageFactory;
use OCP\IConfig;
use OCP\ILogger;
use OCP\IUser;
use OCP\Share\IManager;
use OCP\Share\IShare;
class MountProvider implements IMountProvider {
/**
* @var \OCP\IConfig
*/
protected $config;
/**
* @var IManager
*/
protected $shareManager;
/**
* @var ILogger
*/
protected $logger;
/**
* @param \OCP\IConfig $config
* @param IManager $shareManager
* @param ILogger $logger
*/
public function __construct(IConfig $config, IManager $shareManager, ILogger $logger) {
$this->config = $config;
$this->shareManager = $shareManager;
$this->logger = $logger;
}
/**
* Get all mountpoints applicable for the user and check for shares where we need to update the etags
*
* @param \OCP\IUser $user
* @param \OCP\Files\Storage\IStorageFactory $storageFactory
* @return \OCP\Files\Mount\IMountPoint[]
*/
public function getMountsForUser(IUser $user, IStorageFactory $storageFactory) {
$shares = $this->shareManager->getSharedWith($user->getUID(), \OCP\Share::SHARE_TYPE_USER, null, -1);
$shares = array_merge($shares, $this->shareManager->getSharedWith($user->getUID(), \OCP\Share::SHARE_TYPE_GROUP, null, -1));
$shares = array_merge($shares, $this->shareManager->getSharedWith($user->getUID(), \OCP\Share::SHARE_TYPE_CIRCLE, null, -1));
$shares = array_merge($shares, $this->shareManager->getSharedWith($user->getUID(), \OCP\Share::SHARE_TYPE_ROOM, null, -1));
// filter out excluded shares and group shares that includes self
$shares = array_filter($shares, function (\OCP\Share\IShare $share) use ($user) {
return $share->getPermissions() > 0 && $share->getShareOwner() !== $user->getUID();
});
$superShares = $this->buildSuperShares($shares, $user);
$mounts = [];
$view = new View('/' . $user->getUID() . '/files');
$ownerViews = [];
$sharingDisabledForUser = $this->shareManager->sharingDisabledForUser($user->getUID());
$foldersExistCache = new CappedMemoryCache();
foreach ($superShares as $share) {
try {
/** @var \OCP\Share\IShare $parentShare */
$parentShare = $share[0];
if ($parentShare->getStatus() !== IShare::STATUS_ACCEPTED) {
continue;
}
$owner = $parentShare->getShareOwner();
if (!isset($ownerViews[$owner])) {
$ownerViews[$owner] = new View('/' . $parentShare->getShareOwner() . '/files');
}
$mount = new SharedMount(
'\OCA\Files_Sharing\SharedStorage',
$mounts,
[
'user' => $user->getUID(),
// parent share
'superShare' => $parentShare,
// children/component of the superShare
'groupedShares' => $share[1],
'ownerView' => $ownerViews[$owner],
'sharingDisabledForUser' => $sharingDisabledForUser
],
$storageFactory,
$view,
$foldersExistCache
);
$mounts[$mount->getMountPoint()] = $mount;
} catch (\Exception $e) {
$this->logger->logException($e);
$this->logger->error('Error while trying to create shared mount');
}
}
// array_filter removes the null values from the array
return array_values(array_filter($mounts));
}
/**
* Groups shares by path (nodeId) and target path
*
* @param \OCP\Share\IShare[] $shares
* @return \OCP\Share\IShare[][] array of grouped shares, each element in the
* array is a group which itself is an array of shares
*/
private function groupShares(array $shares) {
$tmp = [];
foreach ($shares as $share) {
if (!isset($tmp[$share->getNodeId()])) {
$tmp[$share->getNodeId()] = [];
}
$tmp[$share->getNodeId()][] = $share;
}
$result = [];
// sort by stime, the super share will be based on the least recent share
foreach ($tmp as &$tmp2) {
@usort($tmp2, function($a, $b) {
if ($a->getShareTime() <= $b->getShareTime()) {
return -1;
}
return 1;
});
$result[] = $tmp2;
}
return array_values($result);
}
/**
* Build super shares (virtual share) by grouping them by node id and target,
* then for each group compute the super share and return it along with the matching
* grouped shares. The most permissive permissions are used based on the permissions
* of all shares within the group.
*
* @param \OCP\Share\IShare[] $allShares
* @param \OCP\IUser $user user
* @return array Tuple of [superShare, groupedShares]
*/
private function buildSuperShares(array $allShares, \OCP\IUser $user) {
$result = [];
$groupedShares = $this->groupShares($allShares);
/** @var \OCP\Share\IShare[] $shares */
foreach ($groupedShares as $shares) {
if (count($shares) === 0) {
continue;
}
$superShare = $this->shareManager->newShare();
// compute super share based on first entry of the group
$superShare->setId($shares[0]->getId())
->setShareOwner($shares[0]->getShareOwner())
->setNodeId($shares[0]->getNodeId())
->setTarget($shares[0]->getTarget());
// use most permissive permissions
$permissions = 0;
$status = IShare::STATUS_PENDING;
foreach ($shares as $share) {
$permissions |= $share->getPermissions();
$status = max($status, $share->getStatus());
if ($share->getTarget() !== $superShare->getTarget()) {
// adjust target, for database consistency
$share->setTarget($superShare->getTarget());
try {
$this->shareManager->moveShare($share, $user->getUID());
} catch (\InvalidArgumentException $e) {
// ignore as it is not important and we don't want to
// block FS setup
// the subsequent code anyway only uses the target of the
// super share
// such issue can usually happen when dealing with
// null groups which usually appear with group backend
// caching inconsistencies
$this->logger->debug(
'Could not adjust share target for share ' . $share->getId() . ' to make it consistent: ' . $e->getMessage(),
['app' => 'files_sharing']
);
}
}
if (!is_null($share->getNodeCacheEntry())) {
$superShare->setNodeCacheEntry($share->getNodeCacheEntry());
}
}
$superShare->setPermissions($permissions)
->setStatus($status);
$result[] = [$superShare, $shares];
}
return $result;
}
}
|
