refactor: implement JsonSerializable in wysiwyg_editor_data

Author: MHajoha

classes/local/api/wysiwyg_editor_data.php

@@ -16,8 +16,12 @@
 
 namespace qtype_questionpy\local\api;
 
+use coding_exception;
+use JsonSerializable;
+use qtype_questionpy\local\array_converter\array_converter;
 use qtype_questionpy\local\array_converter\attributes\array_element_class;
 use qtype_questionpy\local\array_converter\attributes\array_key;
+use qtype_questionpy\local\array_converter\conversion_exception;
 use qtype_questionpy\local\files\file_metadata;
 
 /**
@@ -28,7 +32,7 @@
  * @copyright  2025 TU Berlin, innoCampus {@link https://www.questionpy.org}
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class wysiwyg_editor_data {
+class wysiwyg_editor_data implements JsonSerializable {
     /**
      * Initialize a new WYSIWYG editor data instance.
      *
@@ -47,4 +51,16 @@ public function __construct(
         public array $files = [],
     ) {
     }
+
+    /**
+     * Specify data which should be serialized to JSON
+     * @link https://php.net/manual/en/jsonserializable.jsonserialize.php
+     * @return mixed data which can be serialized by <b>json_encode</b>,
+     * which is a value of any type other than a resource.
+     * @throws coding_exception
+     * @throws conversion_exception
+     */
+    public function jsonSerialize(): mixed {
+        return array_converter::to_array($this);
+    }
 }