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
|
<?php
function can_write_wall(&$a,$owner) {
static $verified = 0;
if((! (local_user())) && (! (remote_user())))
return false;
$uid = local_user();
if(($uid) && ($uid == $owner)) {
return true;
}
if(remote_user()) {
// user remembered decision and avoid a DB lookup for each and every display item
// DO NOT use this function if there are going to be multiple owners
if($verified === 2)
return true;
elseif($verified === 1)
return false;
else {
$r = q("SELECT `contact`.*, `user`.`page-flags` FROM `contact` LEFT JOIN `user` on `user`.`uid` = `contact`.`uid`
WHERE `contact`.`uid` = %d AND `contact`.`id` = %d AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
AND `user`.`blockwall` = 0 AND `readonly` = 0 AND ( `contact`.`rel` IN ( %d , %d ) OR `user`.`page-flags` = %d ) LIMIT 1",
intval($owner),
intval(remote_user()),
intval(CONTACT_IS_SHARING),
intval(CONTACT_IS_FRIEND),
intval(PAGE_COMMUNITY)
);
if(count($r)) {
$verified = 2;
return true;
}
else {
$verified = 1;
}
}
}
return false;
}
function permissions_sql($owner_id,$remote_verified = false,$groups = null) {
$local_user = local_user();
$remote_user = remote_user();
/**
* Construct permissions
*
* default permissions - anonymous user
*/
$sql = " AND allow_cid = ''
AND allow_gid = ''
AND deny_cid = ''
AND deny_gid = ''
";
/**
* Profile owner - everything is visible
*/
if(($local_user) && ($local_user == $owner_id)) {
$sql = '';
}
/**
* Authenticated visitor. Unless pre-verified,
* check that the contact belongs to this $owner_id
* and load the groups the visitor belongs to.
* If pre-verified, the caller is expected to have already
* done this and passed the groups into this function.
*/
elseif($remote_user) {
if(! $remote_verified) {
$r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1",
intval($remote_user),
intval($owner_id)
);
if(count($r)) {
$remote_verified = true;
$groups = init_groups_visitor($remote_user);
}
}
if($remote_verified) {
$gs = '<<>>'; // should be impossible to match
if(is_array($groups) && count($groups)) {
foreach($groups as $g)
$gs .= '|<' . intval($g) . '>';
}
$sql = sprintf(
" AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' )
AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' )
AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s')
",
intval($remote_user),
intval($remote_user),
dbesc($gs),
dbesc($gs)
);
}
}
return $sql;
}
|
