[COMPONENT][Notification] Re-introduce the concept of note attention

Minor refactoring and bug fixing

components/Notification/Entity/Attention.php

@@ -0,0 +1,84 @@
+<?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\Entity;
+
+use App\Core\Entity;
+
+/**
+ * Entity for note attentions
+ *
+ * @category  DB
+ * @package   GNUsocial
+ *
+ * @author    Diogo Peralta Cordeiro <@diogo.site>
+ * @copyright 2022 Free Software Foundation, Inc http://www.fsf.org
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
+ */
+class Attention extends Entity
+{
+    // {{{ Autocode
+    // @codeCoverageIgnoreStart
+    private int $note_id;
+    private int $target_id;
+
+    public function setNoteId(int $note_id): self
+    {
+        $this->note_id = $note_id;
+        return $this;
+    }
+
+    public function getNoteId(): int
+    {
+        return $this->note_id;
+    }
+
+    public function setTargetId(int $target_id): self
+    {
+        $this->target_id = $target_id;
+        return $this;
+    }
+
+    public function getTargetId(): int
+    {
+        return $this->target_id;
+    }
+
+    // @codeCoverageIgnoreEnd
+    // }}} Autocode
+
+    public static function schemaDef(): array
+    {
+        return [
+            'name'        => 'note_attention',
+            'description' => 'Note attentions to actors (that are not a mention)',
+            'fields'      => [
+                'note_id'   => ['type' => 'int', 'foreign key' => true, 'target' => 'Note.id',  'multiplicity' => 'one to one', 'not null' => true, 'description' => 'note_id to give attention'],
+                'target_id' => ['type' => 'int', 'foreign key' => true, 'target' => 'Actor.id', 'multiplicity' => 'one to one', 'not null' => true, 'description' => 'actor_id for feed receiver'],
+            ],
+            'primary key' => ['note_id', 'target_id'],
+            'indexes'     => [
+                'attention_note_id_idx'   => ['note_id'],
+                'attention_target_id_idx' => ['target_id'],
+            ],
+        ];
+    }
+}