process activity deletes from OStatus which for whatever reason do not use the industry standard tombstone mechanism

boot.php

@@ -497,6 +497,7 @@ define ( 'ACTIVITY_TAG',         NAMESPACE_ACTIVITY_SCHEMA . 'tag' );
 define ( 'ACTIVITY_SHARE',       NAMESPACE_ACTIVITY_SCHEMA . 'share' );
 define ( 'ACTIVITY_FAVORITE',    NAMESPACE_ACTIVITY_SCHEMA . 'favorite' );
 define ( 'ACTIVITY_CREATE',      NAMESPACE_ACTIVITY_SCHEMA . 'create' );
+define ( 'ACTIVITY_DELETE',      NAMESPACE_ACTIVITY_SCHEMA . 'delete' );
 define ( 'ACTIVITY_WIN',         NAMESPACE_ACTIVITY_SCHEMA . 'win' );
 define ( 'ACTIVITY_LOSE',        NAMESPACE_ACTIVITY_SCHEMA . 'lose' );
 define ( 'ACTIVITY_TIE',         NAMESPACE_ACTIVITY_SCHEMA . 'tie' );

include/feedutils.php

@@ -900,6 +900,41 @@ function encode_rel_links($links) {
 	return $o;
 }
 
+
+function process_feed_tombstones($feed,$importer,$contact,$pass) {
+
+	$arr_deleted = [];
+
+	$del_entries = $feed->get_feed_tags(NAMESPACE_TOMB, 'deleted-entry');
+	if(is_array($del_entries) && count($del_entries) && $pass != 2) {
+		foreach($del_entries as $dentry) {
+			if(isset($dentry['attribs']['']['ref'])) {
+				$arr_deleted[] = normalise_id($dentry['attribs']['']['ref']);
+			}
+		}
+	}
+
+	if($arr_deleted && is_array($contact)) {
+		foreach($arr_deleted as $mid) {
+			$r = q("SELECT * from item where mid = '%s' and author_xchan = '%s' and uid = %d limit 1",
+				dbesc($mid),
+				dbesc($contact['xchan_hash']),
+				intval($importer['channel_id'])
+			);
+
+			if($r) {
+				$item = $r[0];
+
+				if(! intval($item['item_deleted'])) {
+					logger('deleting item ' . $item['id'] . ' mid=' . $item['mid'], LOGGER_DEBUG);
+					drop_item($item['id'],false);
+				}
+			}
+		}
+	}
+}
+
+
 /**
  * @brief Process atom feed and update anything/everything we might need to update.
  *
@@ -955,43 +990,11 @@ function consume_feed($xml, $importer, &$contact, $pass = 0) {
 
 	$permalink = $feed->get_permalink();
 
-	// Check at the feed level for updated contact name and/or photo
 
-	// process any deleted entries
+	// Check at the feed level for tombstones
 
-	$del_entries = $feed->get_feed_tags(NAMESPACE_TOMB, 'deleted-entry');
+	process_feed_tombstones($feed,$importer,$contact,$pass);
-	if(is_array($del_entries) && count($del_entries) && $pass != 2) {
-		foreach($del_entries as $dentry) {
-			$deleted = false;
-			if(isset($dentry['attribs']['']['ref'])) {
-				$mid = normalise_id($dentry['attribs']['']['ref']);
-				$deleted = true;
-				if(isset($dentry['attribs']['']['when'])) {
-					$when = $dentry['attribs']['']['when'];
-					$when = datetime_convert('UTC','UTC', $when, 'Y-m-d H:i:s');
-				}
-				else
-					$when = datetime_convert('UTC','UTC','now','Y-m-d H:i:s');
-			}
 
-			if($deleted && is_array($contact)) {
-				$r = q("SELECT * from item where mid = '%s' and author_xchan = '%s' and uid = %d limit 1",
-					dbesc($mid),
-					dbesc($contact['xchan_hash']),
-					intval($importer['channel_id'])
-				);
-
-				if($r) {
-					$item = $r[0];
-
-					if(! intval($item['item_deleted'])) {
-						logger('deleting item ' . $item['id'] . ' mid=' . $item['mid'], LOGGER_DEBUG);
-						drop_item($item['id'],false);
-					}
-				}
-			}
-		}
-	}
 
 	// Now process the feed
 
@@ -1033,6 +1036,7 @@ function consume_feed($xml, $importer, &$contact, $pass = 0) {
 				if(! $datarray['mid'])
 					continue;
 
+
 				$item_parent_mid = q("select parent_mid from item where mid = '%s' and uid = %d limit 1",
 					dbesc($parent_mid),
 					intval($importer['channel_id'])
@@ -1090,7 +1094,7 @@ function consume_feed($xml, $importer, &$contact, $pass = 0) {
 
 				$datarray['owner_xchan'] = $contact['xchan_hash'];
 
-				$r = q("SELECT id, edited FROM item WHERE mid = '%s' AND uid = %d LIMIT 1",
+				$r = q("SELECT id, edited, author_xchan, item_deleted FROM item WHERE mid = '%s' AND uid = %d LIMIT 1",
 					dbesc($datarray['mid']),
 					intval($importer['channel_id'])
 				);
@@ -1099,6 +1103,15 @@ function consume_feed($xml, $importer, &$contact, $pass = 0) {
 				// Update content if 'updated' changes
 
 				if($r) {
+					if(activity_match($datarray['verb'],ACTIVITY_DELETE) 
+						&& $datarray['author_xchan'] === $r[0]['author_xchan']) {
+						if(! intval($r[0]['item_deleted'])) {
+							logger('deleting item ' . $r[0]['id'] . ' mid=' . $datarray['mid'], LOGGER_DEBUG);
+							drop_item($r[0]['id'],false);
+						}
+						continue;
+					}
+
 					if((x($datarray,'edited') !== false)
 						&& (datetime_convert('UTC','UTC',$datarray['edited']) !== $r[0]['edited'])) {
 
@@ -1343,8 +1356,7 @@ function consume_feed($xml, $importer, &$contact, $pass = 0) {
 					}
 				}
 
-
+				$r = q("SELECT id, edited, author_xchan, item_deleted FROM item WHERE mid = '%s' AND uid = %d LIMIT 1",
-				$r = q("SELECT id, edited FROM item WHERE mid = '%s' AND uid = %d LIMIT 1",
 					dbesc($datarray['mid']),
 					intval($importer['channel_id'])
 				);
@@ -1352,6 +1364,15 @@ function consume_feed($xml, $importer, &$contact, $pass = 0) {
 				// Update content if 'updated' changes
 
 				if($r) {
+					if(activity_match($datarray['verb'],ACTIVITY_DELETE) 
+						&& $datarray['author_xchan'] === $r[0]['author_xchan']) {
+						if(! intval($r[0]['item_deleted'])) {
+							logger('deleting item ' . $r[0]['id'] . ' mid=' . $datarray['mid'], LOGGER_DEBUG);
+							drop_item($r[0]['id'],false);
+						}
+						continue;
+					}
+
 					if((x($datarray,'edited') !== false)
 						&& (datetime_convert('UTC','UTC',$datarray['edited']) !== $r[0]['edited'])) {