Improved asynchronous message procession

src/Content/Item.php

@@ -635,7 +635,7 @@ class Item
 	public function addSharedPost(array $item, string $body = ''): string
 	{
 		if (empty($body)) {
-			$body = $item['body'];
+			$body = $item['body'] ?? '';
 		}
 
 		if (empty($item['quote-uri-id']) || ($item['quote-uri-id'] == $item['uri-id'])) {

src/Model/Item.php

@@ -3905,11 +3905,12 @@ class Item
 	 * Fetches item for given URI or plink
 	 *
 	 * @param string $uri
-	 * @param integer $uid
+	 * @param int    $uid
+	 * @param int    $completion
 	 *
 	 * @return integer item id
 	 */
-	public static function fetchByLink(string $uri, int $uid = 0): int
+	public static function fetchByLink(string $uri, int $uid = 0, int $completion = ActivityPub\Receiver::COMPLETION_MANUAL): int
 	{
 		Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
 		$item_id = self::searchByLink($uri, $uid);
@@ -3930,7 +3931,7 @@ class Item
 			return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
 		}
 
-		$fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri, [], '', ActivityPub\Receiver::COMPLETION_MANUAL, $uid);
+		$fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri, [], '', $completion, $uid);
 
 		if ($fetched_uri) {
 			$item_id = self::searchByLink($fetched_uri, $uid);
@@ -3990,7 +3991,7 @@ class Item
 		}
 
 		$url = $shared['message_id'] ?: $shared['link'];
-		$id = self::fetchByLink($url);
+		$id = self::fetchByLink($url, 0, ActivityPub\Receiver::COMPLETION_ASYNC);
 		if (!$id) {
 			Logger::notice('Post could not be fetched.', ['url' => $url, 'uid' => $uid]);
 			return 0;

src/Model/Post/Media.php

@@ -35,6 +35,7 @@ use Friendica\Model\Photo;
 use Friendica\Model\Post;
 use Friendica\Network\HTTPClient\Client\HttpClientAccept;
 use Friendica\Network\HTTPClient\Client\HttpClientOptions;
+use Friendica\Protocol\ActivityPub;
 use Friendica\Util\Images;
 use Friendica\Util\Network;
 use Friendica\Util\ParseUrl;
@@ -253,7 +254,7 @@ class Media
 	 */
 	private static function addActivity(array $media): array
 	{
-		$id = Item::fetchByLink($media['url']);
+		$id = Item::fetchByLink($media['url'], 0, ActivityPub\Receiver::COMPLETION_ASYNC);
 		if (empty($id)) {
 			return $media;
 		}

src/Protocol/ActivityPub/ClientToServer.php

@@ -142,7 +142,7 @@ class ClientToServer
 	 */
 	private static function updateContent(int $uid, string $object_id, array $application, array $ldactivity): array
 	{
-		$id            = Item::fetchByLink($object_id, $uid);
+		$id            = Item::fetchByLink($object_id, $uid, ActivityPub\Receiver::COMPLETION_ASYNC);
 		$original_post = Post::selectFirst(['uri-id'], ['uid' => $uid, 'origin' => true, 'id' => $id]);
 		if (empty($original_post)) {
 			Logger::debug('Item not found or does not belong to the user', ['id' => $id, 'uid' => $uid, 'object_id' => $object_id, 'activity' => $ldactivity]);

src/Protocol/ActivityPub/Processor.php

@@ -348,13 +348,9 @@ class Processor
 
 		if ($fetch_parents && empty($activity['directmessage']) && ($activity['id'] != $activity['reply-to-id']) && !Post::exists(['uri' => $activity['reply-to-id']])) {
 			$result = self::fetchParent($activity, !empty($conversation));
-			if (!empty($result)) {
+			if (!empty($result) && ($item['thr-parent'] != $result) && Post::exists(['uri' => $result])) {
-				if (($item['thr-parent'] != $result) && Post::exists(['uri' => $result])) {
 				$item['thr-parent'] = $result;
 			}
-			} elseif (empty($conversation)) {
-				return [];
-			}
 		}
 
 		$item['diaspora_signed_text'] = $activity['diaspora:comment'] ?? '';
@@ -532,39 +528,35 @@ class Processor
 
 		self::addActivityId($activity['reply-to-id']);
 
-		if (!DI::config()->get('system', 'fetch_by_worker')) {
+		$completion = $activity['completion-mode'] ?? Receiver::COMPLETION_NONE;
-			$in_background = false;
+
+		if (DI::config()->get('system', 'decoupled_receiver') && ($completion != Receiver::COMPLETION_MANUAL)) {
+			$in_background = true;
 		}
 
 		$recursion_depth = $activity['recursion-depth'] ?? 0;
 
 		if (!$in_background && ($recursion_depth < DI::config()->get('system', 'max_recursion_depth'))) {
-			Logger::info('Parent not found. Try to refetch it.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
+			Logger::info('Parent not found. Try to refetch it.', ['completion' => $completion, 'recursion-depth' => $recursion_depth, 'parent' => $activity['reply-to-id']]);
 			$result = self::fetchMissingActivity($activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
 			if (empty($result) && self::isActivityGone($activity['reply-to-id'])) {
 				Logger::notice('The activity is gone, the queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
 				if (!empty($activity['entry-id'])) {
 					Queue::deleteById($activity['entry-id']);
 				}
-				return '';
 			} elseif (!empty($result)) {
-				$exists = Post::exists(['uri' => [$result, $activity['reply-to-id']]]);
+				$post = Post::selectFirstPost(['uri'], ['uri' => [$result, $activity['reply-to-id']]]);
-				if ($exists) {
+				if (!empty($post['uri'])) {
-					Logger::info('The activity has been fetched and created.', ['parent' => $result]);
+					Logger::info('The activity has been fetched and created.', ['result' => $result, 'uri' => $post['uri']]);
-					return $result;
+					return $post['uri'];
-				} elseif (DI::config()->get('system', 'fetch_by_worker') || DI::config()->get('system', 'decoupled_receiver')) {
-					Logger::info('The activity has been fetched and will hopefully be created later.', ['parent' => $result]);
 				} else {
 					Logger::notice('The activity exists but has not been created, the queue entry will be deleted.', ['parent' => $result]);
 					if (!empty($activity['entry-id'])) {
 						Queue::deleteById($activity['entry-id']);
 					}
 				}
-				return '';
 			}
-			if (empty($result) && !DI::config()->get('system', 'fetch_by_worker')) {
 			return '';
-			}
 		} elseif (self::isActivityGone($activity['reply-to-id'])) {
 			Logger::notice('The activity is gone. We will not spawn a worker. The queue entry will be deleted', ['parent' => $activity['reply-to-id']]);
 			if ($in_background) {
@@ -586,7 +578,7 @@ class Processor
 			Logger::notice('Fetching is done by worker.', ['parent' => $activity['reply-to-id'], 'recursion-depth' => $recursion_depth]);
 			Fetch::add($activity['reply-to-id']);
 			$activity['recursion-depth'] = 0;
-			$wid = Worker::add(Worker::PRIORITY_HIGH, 'FetchMissingActivity', $activity['reply-to-id'], $activity, '', Receiver::COMPLETION_AUTO);
+			$wid = Worker::add(Worker::PRIORITY_HIGH, 'FetchMissingActivity', $activity['reply-to-id'], $activity, '', Receiver::COMPLETION_ASYNC);
 			Fetch::setWorkerId($activity['reply-to-id'], $wid);
 		} else {
 			Logger::debug('Activity will already be fetched via a worker.', ['url' => $activity['reply-to-id']]);
@@ -867,7 +859,7 @@ class Processor
 		$content = self::addMentionLinks($content, $activity['tags']);
 
 		if (!empty($activity['quote-url'])) {
-			$id = Item::fetchByLink($activity['quote-url']);
+			$id = Item::fetchByLink($activity['quote-url'], 0, ActivityPub\Receiver::COMPLETION_ASYNC);
 			if ($id) {
 				$shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
 				$item['quote-uri-id'] = $shared_item['uri-id'];
@@ -1456,7 +1448,7 @@ class Processor
 			if (empty($post['id'])) {
 				continue;
 			}
-			$id = Item::fetchByLink($post['id']);
+			$id = Item::fetchByLink($post['id'], 0, ActivityPub\Receiver::COMPLETION_ASYNC);
 			if (!empty($id)) {
 				$item = Post::selectFirst(['uri-id', 'featured', 'author-id'], ['id' => $id]);
 				if (!empty($item['uri-id'])) {

src/Protocol/ActivityPub/Queue.php

@@ -22,6 +22,7 @@
 namespace Friendica\Protocol\ActivityPub;
 
 use Friendica\Core\Logger;
+use Friendica\Core\Worker;
 use Friendica\Database\Database;
 use Friendica\Database\DBA;
 use Friendica\DI;
@@ -285,10 +286,26 @@ class Queue
 			}
 		}
 
-		if (!empty($entry['object-id']) && !empty($entry['in-reply-to-id']) && ($entry['object-id'] != $entry['in-reply-to-id']) && DBA::exists('inbox-entry', ['object-id' => $entry['in-reply-to-id']])) {
+		if (!empty($entry['object-id']) && !empty($entry['in-reply-to-id']) && ($entry['object-id'] != $entry['in-reply-to-id'])) {
+		 	if (DBA::exists('inbox-entry', ['object-id' => $entry['in-reply-to-id']])) {
 				// This entry belongs to some other entry that should be processed first
 				return false;
 			}
+			if (!Post::exists(['uri' => $entry['in-reply-to-id']])) {
+				// This entry belongs to some other entry that need to be fetched first
+				if (Fetch::hasWorker($entry['in-reply-to-id'])) {
+					Logger::debug('Fetching of the activity is already queued', ['id' => $entry['activity-id'], 'reply-to-id' => $entry['in-reply-to-id']]);
+					return false;
+				}
+				Fetch::add($entry['in-reply-to-id']);
+				$activity = json_decode($entry['activity'], true);
+				$activity['recursion-depth'] = 0;
+				$wid = Worker::add(Worker::PRIORITY_HIGH, 'FetchMissingActivity', $entry['in-reply-to-id'], $activity, '', Receiver::COMPLETION_ASYNC);
+				Fetch::setWorkerId($entry['in-reply-to-id'], $wid);
+				Logger::debug('Fetch missing activity', ['wid' => $wid, 'id' => $entry['activity-id'], 'reply-to-id' => $entry['in-reply-to-id']]);
+				return false;
+			}
+		}
 
 		return true;
 	}

src/Protocol/ActivityPub/Receiver.php

@@ -80,6 +80,7 @@ class Receiver
 	const COMPLETION_RELAY    = 2;
 	const COMPLETION_MANUAL   = 3;
 	const COMPLETION_AUTO     = 4;
+	const COMPLETION_ASYNC    = 5;
 
 	/**
 	 * Checks incoming message from the inbox
@@ -681,7 +682,7 @@ class Receiver
 			return true;
 		}
 
-		if (!empty($object_data['entry-id']) && $decouple && ($push || ($completion == self::COMPLETION_RELAY))) {
+		if (!empty($object_data['entry-id']) && $decouple && ($push || in_array($completion, [self::COMPLETION_RELAY, self::COMPLETION_ASYNC]))) {
 			if (Queue::isProcessable($object_data['entry-id'])) {
 				// We delay by 5 seconds to allow to accumulate all receivers
 				$delayed = date(DateTimeFormat::MYSQL, time() + 5);

static/defaults.config.php

@@ -298,10 +298,6 @@ return [
 		// Priority for the expiry notification
 		'expire-notify-priority' => Friendica\Core\Worker::PRIORITY_LOW,
 
-		// fetch_by_worker (Boolean)
-		// Fetch missing posts via a background process
-		'fetch_by_worker' => false,
-
 		// fetch_featured_posts (Boolean)
 		// Fetch featured posts from all contacts
 		'fetch_featured_posts' => false,