function can_write_wall(&$a,$owner) {
- if((! (local_user())) && (! (remote_user())))
- return false;
- $uid = local_user();
+ static $verified = 0;
- if(($uid) && ($uid == $owner)) {
- return true;
- }
+ 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
- $r = q("SELECT `contact`.*, `user`.`page-flags` FROM `contact` LEFT JOIN `user` on `user`.`uid` = `contact`.`uid`
- WHERE `contact`.`uid` = %d AND `contact`.`id` = %d AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
- AND `readonly` = 0 AND ( `contact`.`rel` IN ( %d , %d ) OR `user`.`page-flags` = %d OR (`contact`.`network` = 'stat' AND `contact`.rel` = %d)) LIMIT 1",
- intval($owner),
- intval($_SESSION['visitor_id']),
- intval(REL_VIP),
- intval(REL_BUD),
- intval(PAGE_COMMUNITY),
- intval(REL_FAN)
- );
-
- if(count($r))
- return true;
- return false;
+ 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_FOLLOWER),
+ 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;
+}
\ No newline at end of file