1 files changed, 66 insertions, 0 deletions
diff --git a/include/zot.php b/include/zot.php
index be0760a05..f10a02d47 100644
--- a/include/zot.php
+++ b/include/zot.php
@@ -1036,6 +1036,10 @@ function process_delivery($sender,$arr,$deliveries,$relay) {
 		}
 	
 		if($arr['item_restrict'] & ITEM_DELETED) {
+
+			// remove_community_tag is a no-op if this isn't a community tag activity
+			remove_community_tag($sender,$arr,$channel['channel_id']);
+
 			$item_id = delete_imported_item($sender,$arr,$channel['channel_id']);
 			$result[] = array($d['hash'],'deleted');
 
@@ -1116,6 +1120,68 @@ function process_delivery($sender,$arr,$deliveries,$relay) {
 }
 
 
+function remove_community_tag($sender,$arr,$uid) {
+
+	if(! (activity_match($arr['verb'],ACTIVITY_TAG) && ($arr['obj_type'] == ACTIVITY_OBJ_TAGTERM)))
+		return;
+
+	logger('remove_community_tag: invoked');
+ 
+
+	if(! get_pconfig($uid,'system','blocktags')) {
+		logger('remove_community tag: permission denied.');
+		return;
+	}
+
+	$r = q("select * from item where mid = '%s' and uid = %d limit 1",
+		dbesc($arr['mid']),
+		intval($uid)
+	);
+	if(! $r) {
+		logger('remove_community_tag: no item');
+		return;
+	}
+
+	if(($sender['hash'] != $r[0]['owner_xchan']) && ($sender['hash'] != $r[0]['author_xchan'])) {
+		logger('remove_community_tag: sender not authorised.');
+		return;
+	}
+
+	$i = $r[0];
+
+	if($i['target'])
+		$i['target'] = json_decode($i['target'],true);
+	if($i['object'])
+		$i['object'] = json_decode($i['object'],true);
+
+	if(! ($i['target'] && $i['object'])) {
+		logger('remove_community_tag: no target/object');
+		return;
+	}
+
+	$message_id = $i['target']['id'];
+
+	$r = q("select id from item where mid = '%s' and uid = %d limit 1",
+		dbesc($message_id),
+		intval($uid)
+	);
+	if(! $r) {
+		logger('remove_community_tag: no parent message');
+		return;
+	}
+	
+	$x = q("delete from term where uid = %d and oid = %d and otype = %d and type = %d and term = '%s' and url = '%s' limit 1",
+		intval($uid),
+		intval($r[0]['id']),
+		intval(TERM_OBJ_POST),
+		intval(TERM_HASHTAG),
+		dbesc($i['object']['title']),
+		dbesc(get_rel_link($i['object']['link'],'alternate'))
+	);
+
+	return;
+}
+
 function update_imported_item($sender,$item,$uid) {
 
 	item_store_update($item);