diff options
Diffstat (limited to 'include/security.php')
| -rw-r--r-- | include/security.php | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/include/security.php b/include/security.php index c74a9b4a3..789e47db2 100644 --- a/include/security.php +++ b/include/security.php @@ -44,3 +44,74 @@ function can_write_wall(&$a,$owner) { 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; +}
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