[NOTIFICATION] Implement Target Collector

components/Notification/Notification.php

@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+// {{{ License
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU social is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+// }}}
+
+namespace Component\Notification;
+
+use App\Core\DB\DB;
+use App\Core\Event;
+use App\Core\Log;
+use App\Core\Modules\Component;
+use App\Entity\Activity;
+use App\Entity\Actor;
+use Component\FreeNetwork\FreeNetwork;
+use DateTime;
+use DateTimeInterface;
+
+class Notification extends Component
+{
+    /**
+     * Enqueues a notification for an Actor (user or group) which means
+     * it shows up in their home feed and such.
+     */
+    public function onNewNotification(Actor $sender, Activity $activity, array $ids_already_known = [], ?string $reason = null): bool
+    {
+        $targets = $activity->getNotificationTargets($ids_already_known);
+        foreach ($targets as $target) {
+            $this->notify($sender, $activity, $target, $reason);
+        }
+
+        return Event::next;
+    }
+
+    public function notify(Actor $sender, Activity $activity, Actor $target, ?string $reason = null): bool
+    {
+        if ($target->isGroup()) {
+            // FIXME: Make sure we check (for both local and remote) users are in the groups they send to!
+        } else {
+            if ($target->hasBlocked($activity->getActor())) {
+                Log::info("Not saving reply to actor {$target->getId()} from sender {$sender->getId()} because of a block.");
+                return false;
+            }
+        }
+
+        if ($target->getIsLocal()) {
+            // TODO: use https://symfony.com/doc/current/notifier.html
+        } else {
+            return FreeNetwork::notify($sender, $activity, $target, $reason);
+        }
+        return true;
+    }
+}