Move Mastodon API entities to src/Object

src/BaseEntity.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Friendica;
+
+/**
+ * The API entity classes are meant as data transfer objects. As such, their member should be protected.
+ * Then the JsonSerializable interface ensures the protected members will be included in a JSON encode situation.
+ *
+ * Constructors are supposed to take as arguments the Friendica dependencies/model/collection/data it needs to
+ * populate the class members.
+ */
+abstract class BaseEntity implements \JsonSerializable
+{
+	public function jsonSerialize()
+	{
+		return get_object_vars($this);
+	}
+}