Basic Chat and Message model implementation

src/models/Base.js

@@ -11,6 +11,29 @@ class Base {
          */
         Object.defineProperty(this, 'client', { value: client });
     }
+
+    _clone() {
+        return Object.assign(Object.create(this), this);
+      }
+    
+    _patch(data) { return data; }
+
+    /**
+     * Name that represents this model in the WhatsApp Web Store
+     * @readonly
+     */
+    static get WAppModel() {
+        return this.name;
+    }
+
+    /**
+     * Extra fields to add to model serialization 
+     * @readonly
+     */
+    static get extraFields() {
+        return [];
+    }
+
 }
 
 module.exports = Base;