Fix all errors in Protocol namespace

src/Protocol/ActivityPub/ClientToServer.php

@@ -323,7 +323,7 @@ class ClientToServer
 			$requester_id = Contact::getIdForURL($requester, $owner['uid']);
 			if (!empty($requester_id)) {
 				$permissionSets = DI::permissionSet()->selectByContactId($requester_id, $owner['uid']);
-				if (!empty($permissionSets)) {
+				if ($permissionSets->getTotalCount() > 0) {
 					$condition = ['psid' => array_merge($permissionSets->column('id'),
 						[DI::permissionSet()->selectPublicForUser($owner['uid'])])];
 				}

src/Protocol/ActivityPub/Delivery.php

@@ -42,6 +42,8 @@ class Delivery
 				continue;
 			}
 
+			$result = [];
+
 			if (!$serverfail) {
 				$result = self::deliverToInbox($post['command'], 0, $inbox, $owner, $post['receivers'], $post['uri-id']);
 
@@ -121,11 +123,12 @@ class Delivery
 					$serverfail = $response->isTimeout();
 				} catch (\Throwable $th) {
 					Logger::notice('Got exception', ['code' => $th->getCode(), 'message' => $th->getMessage()]);
+					$response   = null;
 					$success    = false;
 					$serverfail = true;
 				}
 				$runtime = microtime(true) - $timestamp;
-				if (!$success) {
+				if ($success === false) {
 					// 5xx errors are problems on the server. We don't need to continue delivery then.
 					if (!$serverfail && ($response->getReturnCode() >= 500) && ($response->getReturnCode() <= 599)) {
 						$serverfail = true;

src/Protocol/ActivityPub/Processor.php

@@ -1361,6 +1361,7 @@ class Processor
 			}
 
 			$hash = substr($tag['name'], 0, 1);
+			$type = 0;
 
 			if ($tag['type'] == 'Mention') {
 				if (in_array($hash, [Tag::TAG_CHARACTER[Tag::MENTION],
@@ -1616,7 +1617,7 @@ class Processor
 			return [];
 		}
 
-		if (!self::isValidObject($object, $url)) {
+		if (!self::isValidObject($object)) {
 			return [];
 		}
 
@@ -1657,10 +1658,6 @@ class Processor
 			return '';
 		}
 
-		if (empty($curlResult)) {
-			return '';
-		}
-
 		$body = $curlResult->getBodyString();
 		if (!$curlResult->isSuccess() || empty($body)) {
 			if (in_array($curlResult->getReturnCode(), [403, 404, 406, 410])) {
@@ -1680,7 +1677,7 @@ class Processor
 			return null;
 		}
 
-		if (!self::isValidObject($object, $url)) {
+		if (!self::isValidObject($object)) {
 			return null;
 		}
 
@@ -1829,6 +1826,8 @@ class Processor
 		Logger::notice('Fetch replies - start', ['replies' => $url, 'callstack' => $child['callstack'], 'system' => $callstack]);
 		$fetched = 0;
 		foreach ($replies as $reply) {
+			$id = '';
+
 			if (is_array($reply)) {
 				$ldobject = JsonLD::compact($reply);
 				$id = JsonLD::fetchElement($ldobject, '@id');
@@ -2120,9 +2119,8 @@ class Processor
 			self::transmitPendingEvents($cid, $owner['uid']);
 		}
 
-		if (empty($contact)) {
 		Contact::update(['hub-verify' => $activity['id'], 'protocol' => Protocol::ACTIVITYPUB], ['id' => $cid]);
-		}
+
 		Logger::notice('Follow user ' . $uid . ' from contact ' . $cid . ' with id ' . $activity['id']);
 		Queue::remove($activity);
 	}
@@ -2334,6 +2332,8 @@ class Processor
 	 */
 	public static function acceptFollowUser(array $activity)
 	{
+		$check_id = false;
+
 		if (!empty($activity['object_actor'])) {
 			$uid      = User::getIdForURL($activity['object_actor']);
 			$check_id = false;

src/Protocol/ActivityPub/Queue.php

@@ -414,7 +414,7 @@ class Queue
 	{
 		$entries = DBA::select('inbox-entry', ['id'], ["NOT `trust` AND `wid` IS NULL"], ['order' => ['id' => true]]);
 		while ($entry = DBA::fetch($entries)) {
-			$data = self::reprepareActivityById($entry['id'], false);
+			$data = self::reprepareActivityById($entry['id']);
 			if ($data['trust']) {
 				DBA::update('inbox-entry', ['trust' => true], ['id' => $entry['id']]);
 			}

src/Protocol/ActivityPub/Receiver.php

@@ -307,6 +307,7 @@ class Receiver
 		$id          = JsonLD::fetchElement($activity, '@id');
 		$type        = JsonLD::fetchElement($activity, '@type');
 		$object_id   = JsonLD::fetchElement($activity, 'as:object', '@id');
+		$object_type = '';
 
 		if (!empty($object_id) && in_array($type, ['as:Create', 'as:Update'])) {
 			$fetch_id = $object_id;
@@ -630,7 +631,7 @@ class Receiver
 			$id            = JsonLD::fetchElement($activity, '@id');
 			$object_id     = JsonLD::fetchElement($activity, 'as:object', '@id');
 
-			if (!empty($published) && !empty($object_id) && in_array($type, ['as:Create', 'as:Update']) && in_array($object_type, self::CONTENT_TYPES)
+			if (!empty($published) && $object_id !== null && in_array($type, ['as:Create', 'as:Update']) && in_array($object_type, self::CONTENT_TYPES)
 				&& ($push || ($completion != self::COMPLETION_MANUAL)) && DI::contentItem()->isTooOld($published) && !Post::exists(['uri' => $object_id])) {
 				Logger::debug('Activity is too old. It will not be processed', ['push' => $push, 'completion' => $completion, 'type' =>  $type,  'object-type' => $object_type, 'published' => $published, 'id' => $id, 'object-id' => $object_id]);
 				return true;
@@ -641,7 +642,7 @@ class Receiver
 
 		// Test the provided signatures against the actor and "attributedTo"
 		if ($trust_source) {
-			if (!empty($attributed_to) && !empty($actor)) {
+			if (!empty($attributed_to) && $actor !== null) {
 				$trust_source = (in_array($actor, $signer) && in_array($attributed_to, $signer));
 			} else {
 				$trust_source = in_array($actor, $signer);
@@ -1185,6 +1186,8 @@ class Receiver
 		}
 
 		$parent_followers = '';
+		$parent_profile   = [];
+
 		$parent = Post::selectFirstPost(['parent-author-link'], ['uri' => $reply]);
 		if (!empty($parent['parent-author-link'])) {
 			$parent_profile = APContact::getByURL($parent['parent-author-link']);

src/Protocol/ActivityPub/Transmitter.php

@@ -573,11 +573,12 @@ class Transmitter
 		$exclusive  = false;
 		$mention    = false;
 		$audience   = [];
+		$owner      = false;
 
 		// Check if we should always deliver our stuff via BCC
 		if (!empty($item['uid'])) {
 			$owner = User::getOwnerDataById($item['uid']);
-			if (!empty($owner)) {
+			if (is_array($owner)) {
 				$always_bcc = $owner['hide-friends'];
 				$is_group   = ($owner['account-type'] == User::ACCOUNT_TYPE_COMMUNITY);
 
@@ -1399,7 +1400,7 @@ class Transmitter
 		$type = self::getTypeOfItem($item);
 
 		if (!$object_mode) {
-			$data = ['@context' => $context ?? ActivityPub::CONTEXT];
+			$data = ['@context' => ActivityPub::CONTEXT];
 
 			if ($item['deleted'] && ($item['gravity'] == Item::GRAVITY_ACTIVITY)) {
 				$type = 'Undo';
@@ -1750,6 +1751,7 @@ class Transmitter
 
 		$title   = $item['title'];
 		$summary = $item['content-warning'] ?: BBCode::toPlaintext(BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB));
+		$type    = '';
 
 		if ($item['event-type'] == 'event') {
 			$type = 'Event';

src/Protocol/Delivery.php

@@ -12,7 +12,6 @@ use Friendica\Contact\FriendSuggest\Exception\FriendSuggestNotFoundException;
 use Friendica\Core\Logger;
 use Friendica\Core\Protocol;
 use Friendica\Core\Worker;
-use Friendica\Database\Database;
 use Friendica\Database\DBA;
 use Friendica\DI;
 use Friendica\Model\Contact;
@@ -48,6 +47,8 @@ class Delivery
 		$top_level      = false;
 		$followup       = false;
 		$public_message = false;
+		$parent         = false;
+		$thr_parent     = false;
 
 		$items = [];
 		if ($cmd == self::MAIL) {

src/Protocol/Diaspora.php

@@ -623,22 +623,21 @@ class Diaspora
 	 */
 	private static function validPosting(array $msg)
 	{
-		$data = XML::parseString($msg['message']);
+		$element = XML::parseString($msg['message']);
 
-		if (!is_object($data)) {
+		if (!is_object($element)) {
 			Logger::info('No valid XML', ['message' => $msg['message']]);
 			return false;
 		}
 
+		$oldXML = false;
+
 		// Is this the new or the old version?
-		if ($data->getName() == 'XML') {
+		if ($element->getName() === 'XML') {
 			$oldXML = true;
-			foreach ($data->post->children() as $child) {
+			foreach ($element->post->children() as $child) {
 				$element = $child;
 			}
-		} else {
-			$oldXML = false;
-			$element = $data;
 		}
 
 		$type = $element->getName();
@@ -1460,7 +1459,7 @@ class Diaspora
 		 */
 
 		foreach ($matches as $match) {
-			if (empty($match)) {
+			if ($match === '') {
 				continue;
 			}
 
@@ -3030,7 +3029,7 @@ class Diaspora
 			// The "addr" field should always be filled.
 			// If this isn't the case, it will raise a notice some lines later.
 			// And in the log we will see where it came from, and we can handle it there.
-			Logger::notice('Empty addr', ['contact' => $contact ?? []]);
+			Logger::notice('Empty addr', ['contact' => $contact]);
 		}
 
 		$envelope = self::buildMessage($msg, $owner, $contact, $owner['uprvkey'], $pubkey ?? '', $public_batch);
@@ -3655,6 +3654,8 @@ class Diaspora
 	 */
 	public static function sendFollowup(array $item, array $owner, array $contact, bool $public_batch = false): int
 	{
+		$type = '';
+
 		if (in_array($item['verb'], [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE])) {
 			$message = self::constructAttend($item, $owner);
 			$type = 'event_participation';

src/Protocol/Feed.php

@@ -736,7 +736,7 @@ class Feed
 				$publish_at = date(DateTimeFormat::MYSQL, $publish_time);
 
 				if (Post\Delayed::add($posting['item']['uri'], $posting['item'], $posting['notify'], Post\Delayed::PREPARED, $publish_at, $posting['taglist'], $posting['attachments'])) {
-					DI::pConfig()->set($item['uid'], 'system', 'last_publish', $publish_time);
+					DI::pConfig()->set($posting['item']['uid'], 'system', 'last_publish', $publish_time);
 				}
 			}
 		}
@@ -1407,7 +1407,7 @@ class Feed
 
 				$contact = Contact::getByURL($item['author-link']) ?: $owner;
 				$contact['nickname'] = $contact['nickname'] ?? $contact['nick'];
-				$author = self::addAuthor($doc, $contact, false);
+				$author = self::addAuthor($doc, $contact);
 				$entry->appendChild($author);
 			}
 		} else {

src/Util/JsonLD.php

@@ -286,7 +286,7 @@ class JsonLD
 	 * @param $type
 	 * @param $type_value
 	 *
-	 * @return string fetched element
+	 * @return string|null fetched element
 	 */
 	public static function fetchElement($array, $element, $key = '@id', $type = null, $type_value = null)
 	{