aboutsummaryrefslogtreecommitdiffstats
path: root/include/permissions.php
blob: 642d2fcc3988a92b36dade93a3eff202ce1f1004 (plain) (blame)
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
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
<?php



	$global_perms = array(
		// Read only permissions
		'view_stream'   => array('channel_r_stream',  PERMS_R_STREAM,  true),
		'view_profile'  => array('channel_r_profile', PERMS_R_PROFILE, true),
		'view_photos'   => array('channel_r_photos',  PERMS_R_PHOTOS,  true),
		'view_contacts' => array('channel_r_abook',   PERMS_R_ABOOK,   true),

		// Write permissions
		'send_stream'   => array('channel_w_stream',  PERMS_W_STREAM,  false),
		'post_wall'     => array('channel_w_wall',    PERMS_W_WALL,    false),
		'tag_deliver'   => array('channel_w_tagwall', PERMS_W_TAGWALL, false),
		'post_comments' => array('channel_w_comment', PERMS_W_COMMENT, false),
		'post_mail'     => array('channel_w_mail',    PERMS_W_MAIL,    false),
		'post_photos'   => array('channel_w_photos',  PERMS_W_PHOTOS,  false),
		'chat'          => array('channel_w_chat',    PERMS_W_CHAT,    false),
	);



function perms_text() {
	$perms_text = array(
		'view_stream' => t('Who can view your channel stream and posts'),
		'view_profile' => t('Who can view your channel profile'),
		'view_photos' => t('Who can view your photo albums'),
		'view_contacts' => t('Who can view your address book'),

		'send_stream' => t('Who can send you their channel stream and posts'),
		'post_wall' => t('Who can post on your channel page'),
		'post_comments' => t('Who can comment on your posts'),
		'post_mail' => t('Who can send you private mail messages'),
		'post_photos' => t('Who can post photos to your photo albums'),
		'tag_deliver' => t('Who can forward to all your channel contacts via post tags'),
		'chat' => t('Who can chat with you (when available)')
	);
	return $perms_text;
}
		



/**
 * get_all_perms($uid,$observer)
 *
 * @param $uid : The channel_id associated with the resource owner
 * @param $observer: The xchan_hash representing the observer
 *
 * @returns: array of all permissions, key is permission name, value is integer 0 or 1
 */

function get_all_perms($uid,$observer,$internal_use = true) {

	global $global_perms;

	// Save lots of individual lookups

	$r = null;
	$c = null;
	$x = null;

	$channel_checked = false;
	$onsite_checked  = false;
	$abook_checked   = false;

	$ret = array();

	foreach($global_perms as $perm_name => $permission) {

		// First find out what the channel owner declared permissions to be.

		$channel_perm = $permission[0];

		if(! $channel_checked) {
			$r = q("select %s, channel_hash from channel where channel_id = %d limit 1",
				dbesc($channel_perm),
				intval($uid)
			);

			$channel_checked = true;
		}

		if(! $r) {
			$ret[$perm_name] = false;
			continue;
		}

		// Check if this $uid is actually the $observer

		if($r[0]['channel_hash'] === $observer) {
			$ret[$perm_name] = true;
			continue;
		}

		// If it's an unauthenticated observer, we only need to see if PERMS_PUBLIC is set

		if(! $observer) {
			$ret[$perm_name] = (($r[0][$channel_perm] & PERMS_PUBLIC) ? true : false);
			continue;
		}


		// If we're still here, we have an observer, which means they're in the network.

		if($r[0][$channel_perm] & PERMS_NETWORK) {
			$ret[$perm_name] = true;
			continue;
		}

		// If PERMS_SITE is specified, find out if they've got an account on this hub

		if($r[0][$channel_perm] & PERMS_SITE) {
			if(! $onsite_checked) {
				$c = q("select channel_hash from channel where channel_hash = '%s' limit 1",
					dbesc($observer)
				);

				$onsite_checked = true;
			}
	
			if($c)
				$ret[$perm_name] = true;
			else
				$ret[$perm_name] = false;

			continue;
		}	

		// If PERMS_CONTACTS or PERMS_SPECIFIC, they need to be in your address book
		// and not blocked/ignored

		if(! $abook_checked) {
			$x = q("select abook_my_perms, abook_flags from abook 
				where abook_channel = %d and abook_xchan = '%s' limit 1",
				intval($uid),
				dbesc($observer)
			);
			$abook_checked = true;
		}


		// If they're blocked - they can't read or write
 
		if((! $x) || ($x[0]['abook_flags'] & ABOOK_FLAG_BLOCKED)) {
			$ret[$perm_name] = false;
			continue;
		}
		
		// If we're still going, they are a contact

		if($r && $r[0][$channel_perm] & PERMS_CONTACTS) {

			// Check if this is a write permission and they are being ignored
			// This flag is only visible internally.

			if(($internal_use) && (! $global_perms[$permission][2]) && ($x[0]['abook_flags'] & ABOOK_FLAG_IGNORED)) {
				$ret[$perm_name] = false;
				continue;
			}

			// Otherwise they're a contact, so they have permission

			$ret[$perm_name] = true;
			continue;
		}

		// Permission granted to certain channels. Let's see if the observer is one of them

		if(($r) && ($r[0][$channel_perm] & PERMS_SPECIFIC)) {
			if(($x) && ($x[0]['abook_my_perms'] & $global_perms[$permission][1])) {
				$ret[$perm_name] = true;
				continue;
			}
		}

		// No permissions allowed.

		$ret[$perm_name] = false;
		continue;

	}

	return $ret;
}


function perm_is_allowed($uid,$observer,$permission) {

	global $global_perms;

	// First find out what the channel owner declared permissions to be.

	$channel_perm = $global_perms[$permission][0];

	$r = q("select %s, channel_hash from channel where channel_id = %d limit 1",
		dbesc($channel_perm),
		intval($uid)
	);
	if(! $r)
		return false;

	// Check if this $uid is actually the $observer

	if($r[0]['channel_hash'] === $observer)
		return true;

	// If it's an unauthenticated observer, we only need to see if PERMS_PUBLIC is set

	if(! $observer) {
		return(($r[0][$channel_perm] & PERMS_PUBLIC) ? true : false);
	}

	// If we're still here, we have an observer, which means they're in the network.

	if($r[0][$channel_perm] & PERMS_NETWORK)
		return true;


	// If PERMS_SITE is specified, find out if they've got an account on this hub

	if($r[0][$channel_perm] & PERMS_SITE) {
		$c = q("select channel_hash from channel where channel_hash = '%s' limit 1",
			dbesc($observer)
		);
		if($c)
			return true;
		return false;
	}	

	// If PERMS_CONTACTS or PERMS_SPECIFIC, they need to be in your address book
	// and not blocked/ignored

	$x = q("select abook_my_perms, abook_flags from abook where abook_channel = %d and abook_xchan = '%s' limit 1",
		intval($uid),
		dbesc($observer)
	);

	// If they're blocked - they can't read or write
 
	if((! $x) || ($x[0]['abook_flags'] & ABOOK_FLAG_BLOCKED))
		return false;
		
	// If we're still going, they are a contact

	if($r[0][$channel_perm] & PERMS_CONTACTS) {

		// Check if this is a write permission and they are being ignored

		if((! $global_perms[$permission][2]) && ($x[0]['abook_flags'] & ABOOK_FLAG_IGNORED))
			return false;

		// Otherwise they're a contact, so they have permission

		return true;
	}

	// Permission granted to certain channels. Let's see if the observer is one of them

	if($r[0][$channel_perm] & PERMS_SPECIFIC) {
		if($x[0]['abook_my_perms'] & $global_perms[$permission][1])
			return true;
	}

	// No permissions allowed.

	return false;		

}