3 * @file /src/Util/Security.php
6 namespace Friendica\Util;
8 use Friendica\Database\DBA;
9 use Friendica\Model\Contact;
10 use Friendica\Model\Group;
11 use Friendica\Model\User;
12 use Friendica\Core\Session;
15 * Secures that User is allow to do requests
19 public static function canWriteToUserWall($owner)
23 if (!Session::isAuthenticated()) {
32 if (local_user() && ($owner == 0)) {
36 if (!empty(Session::getRemoteContactID($owner))) {
37 // use remembered decision and avoid a DB lookup for each and every display item
38 // DO NOT use this function if there are going to be multiple owners
39 // We have a contact-id for an authenticated remote user, this block determines if the contact
40 // belongs to this page owner, and has the necessary permissions to post content
42 if ($verified === 2) {
44 } elseif ($verified === 1) {
47 $cid = Session::getRemoteContactID($owner);
52 $r = q("SELECT `contact`.*, `user`.`page-flags` FROM `contact` INNER JOIN `user` on `user`.`uid` = `contact`.`uid`
53 WHERE `contact`.`uid` = %d AND `contact`.`id` = %d AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
54 AND `user`.`blockwall` = 0 AND `readonly` = 0 AND (`contact`.`rel` IN (%d , %d) OR `user`.`page-flags` = %d) LIMIT 1",
57 intval(Contact::SHARING),
58 intval(Contact::FRIEND),
59 intval(User::PAGE_FLAGS_COMMUNITY)
62 if (DBA::isResult($r)) {
74 public static function getPermissionsSQLByUserId($owner_id)
76 $local_user = local_user();
77 $remote_contact = Session::getRemoteContactID($owner_id);
80 * Construct permissions
82 * default permissions - anonymous user
84 $sql = " AND allow_cid = ''
90 * Profile owner - everything is visible
92 if ($local_user && $local_user == $owner_id) {
95 * Authenticated visitor. Load the groups the visitor belongs to.
97 } elseif ($remote_contact) {
98 $gs = '<<>>'; // should be impossible to match
100 $groups = Group::getIdsByContactId($remote_contact);
102 if (is_array($groups)) {
103 foreach ($groups as $g) {
104 $gs .= '|<' . intval($g) . '>';
109 " AND (NOT (deny_cid REGEXP '<%d>' OR deny_gid REGEXP '%s')
110 AND (allow_cid REGEXP '<%d>' OR allow_gid REGEXP '%s' OR (allow_cid = '' AND allow_gid = ''))) ",
111 intval($remote_contact),
113 intval($remote_contact),