lots of improvements

shared/lib/Mail/Entity/EntityMutableAbstract.php

@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: Sebastian Krupinski <krupinski01@gmail.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace KTXF\Mail\Entity;
+
+use KTXF\Mail\Object\MessagePropertiesMutableInterface;
+use KTXF\Resource\Provider\Node\NodeMutableAbstract;
+use KTXF\Resource\Provider\Node\NodePropertiesMutableInterface;
+
+/**
+ * Abstract Mail Entity Mutable Class
+ * 
+ * Provides common implementation for mutable mail entities
+ * 
+ * @since 2025.05.01
+ */
+abstract class EntityMutableAbstract extends NodeMutableAbstract implements EntityMutableInterface {
+
+    public const JSON_TYPE = EntityMutableInterface::JSON_TYPE;
+
+    protected MessagePropertiesMutableInterface $properties;
+
+    /**
+     * @inheritDoc
+     */
+    public function getProperties(): MessagePropertiesMutableInterface {
+        return $this->properties;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function setProperties(NodePropertiesMutableInterface $value): static {
+        if (!$value instanceof MessagePropertiesMutableInterface) {
+            throw new \InvalidArgumentException('Properties must implement MessagePropertiesMutableInterface');
+        }
+
+        $this->properties = $value;
+
+        return $this;
+    }
+}