+function tgroup_check($uid,$item) {
+
+ $a = get_app();
+
+ $mention = false;
+
+ // check that the message originated elsewhere and is a top-level post
+
+ if(($item['wall']) || ($item['origin']) || ($item['uri'] != $item['parent-uri']))
+ return false;
+
+
+ $u = q("select * from user where uid = %d limit 1",
+ intval($uid)
+ );
+ if(! count($u))
+ return false;
+
+ $community_page = (($u[0]['page-flags'] == PAGE_COMMUNITY) ? true : false);
+ $prvgroup = (($u[0]['page-flags'] == PAGE_PRVGROUP) ? true : false);
+
+
+ $link = normalise_link($a->get_baseurl() . '/profile/' . $u[0]['nickname']);
+
+ // Diaspora uses their own hardwired link URL in @-tags
+ // instead of the one we supply with webfinger
+
+ $dlink = normalise_link($a->get_baseurl() . '/u/' . $u[0]['nickname']);
+
+ $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism',$item['body'],$matches,PREG_SET_ORDER);
+ if($cnt) {
+ foreach($matches as $mtch) {
+ if(link_compare($link,$mtch[1]) || link_compare($dlink,$mtch[1])) {
+ $mention = true;
+ logger('tgroup_check: mention found: ' . $mtch[2]);
+ }
+ }
+ }
+
+ if(! $mention)
+ return false;
+
+ if((! $community_page) && (! $prvgroup))
+ return false;
+
+
+
+ return true;
+
+}
+
+
+