create method toJSON for item-metadata entity

src/api/endpoints/class-tainacan-rest-metadata-controller.php

@@ -137,7 +137,7 @@ class TAINACAN_REST_Metadata_Controller extends WP_REST_Controller {
 			if($item_metadata->validate()) {
 				$metadata_updated = $this->item_metadata_repository->insert( $item_metadata );
 
-				return new WP_REST_Response( $metadata_updated->get_metadata()->__toJSON(), 201 );
+				return new WP_REST_Response( $metadata_updated->__toJSON(), 201 );
 			} else {
 				return new WP_REST_Response( $item_metadata->get_errors(), 200);
 			}

src/classes/entities/class-tainacan-entity.php

@@ -251,7 +251,7 @@ class Entity {
 			$attributes[$prop] = $this->get_mapped_property($prop);
 		}
 
-		return json_encode($attributes, JSON_NUMERIC_CHECK, JSON_UNESCAPED_UNICODE);
+		return json_encode($attributes, JSON_NUMERIC_CHECK);
 	}
  
 }

src/classes/entities/class-tainacan-item-metadata-entity.php

@@ -25,6 +25,13 @@ class Item_Metadata_Entity extends Entity {
 	public function  __toString(){
 		return 'Hello, I\'m the Item Metadata Entity';
 	}
+
+    public function  __toJSON(){
+        $json['value'] = $this->get_value();
+        $json['item'] = $this->get_item();
+        $json['metadata'] = $this->get_metadata();
+	    return json_encode($json);
+    }
     
     /**
      * Define the item

src/js/store/store.js

@@ -1,8 +1,8 @@
 import Vue from 'vue';
 import Vuex from 'vuex';
 
-import item from './modules/item/item';
-import collection from './modules/collection/collection';
+import item from './modules/item/';
+import collection from './modules/collection/';
 
 Vue.use(Vuex);