Add types to Game class

src/frontend/game.ts

@@ -13,21 +13,24 @@
  * limitations under the License.
  */
 
-import Phaser from 'phaser';
+import * as Phaser from 'phaser';
 import SplashScene from './scenes/splash';
 import LoginScene from './scenes/login';
+import {BaseBackend} from '../backends/base'
 import './game.css';
 
 /** Main game class serving as frontend. */
 class Game extends Phaser.Game {
+  backend: BaseBackend;
+
   /**
    * Construct a game instance linked to an already initialised backend.
    *
    * @param {object} backend - Reference to the backend instance
    */
-  constructor(backend) {
+  constructor(backend: BaseBackend) {
     // Phaser configuration
-    const config = {
+    const config: Phaser.Types.Core.GameConfig = {
       title: 'Aug[m]entile',
       url: 'https://edugit.org/auglement/augmentile',
       backgroundColor: 0xffb175,
@@ -76,6 +79,8 @@ class Game extends Phaser.Game {
       'message': error,
     });
   }
+
+  loadMap(mapData) {}
 }
 
 export default Game;