feat: Add level complete and load next level

Author: johnedvard

src/Game.js

@@ -1,4 +1,5 @@
-import { init, initPointer, initInput, GameLoop, onPointer } from 'kontra';
+import { init, initPointer, initInput, GameLoop, onPointer, on } from 'kontra';
+import { LEVEL_COMPLETE } from './gameEvents';
 import { Level } from './Level';
 
 export class Game {
@@ -16,7 +17,7 @@ export class Game {
     initInput();
     this.addPointerListeners();
 
-    this.loadLevel('level1');
+    this.loadLevel(1);
 
     let loop = GameLoop({
       update: function () {
@@ -28,9 +29,11 @@ export class Game {
     });
 
     loop.start(); // start the game
+    this.listenForGameEvents();
   }
 
   loadLevel(levelId) {
+    console.log('load level', levelId);
     this.level = new Level(levelId, { game: this });
   }
 
@@ -42,4 +45,12 @@ export class Game {
       this.isDragging = false;
     });
   }
+
+  listenForGameEvents() {
+    on(LEVEL_COMPLETE, this.onLevelComplete);
+  }
+  onLevelComplete = () => {
+    this.level.destroy();
+    this.loadLevel(this.level.levelId + 1);
+  };
 }

src/Goal.js

@@ -1,7 +1,7 @@
 import { emit } from 'kontra';
 
 import { isBoxCollision } from './utils';
-import { GOAL_COLLISION } from './gameEvents';
+import { GOAL_COLLISION, LEVEL_COMPLETE } from './gameEvents';
 
 export class Goal {
   level;
@@ -52,6 +52,7 @@ export class Goal {
     if (this.radiusY <= 0) this.radiusY = 0;
     if (this.radiusX <= 0 && this.radiusY <= 0) {
       this.hasVanished = true;
+      emit(LEVEL_COMPLETE);
     }
   }
   checkCollision() {

src/Level.js

@@ -1,3 +1,6 @@
+import { emit, on, off } from 'kontra';
+
+import { GOAL_COLLISION, LEVEL_COMPLETE } from './gameEvents';
 import { Goal } from './Goal';
 import { Player } from './Player';
 import { Saw } from './Saw';
@@ -8,9 +11,11 @@ export class Level {
   saws = [];
   goals = [];
   isLevelLoaded = false;
+  levelId = -1;
   constructor(levelId, { game }) {
     this.game = game;
-    this.loadLevel(levelId).then((levelData) => {
+    this.levelId = levelId;
+    this.loadLevel('level' + levelId).then((levelData) => {
       this.createPlayer(levelData);
       this.createSaws(levelData);
       this.createGoals(levelData);
@@ -89,4 +94,8 @@ export class Level {
       });
     }
   }
+
+  destroy() {
+    console.log('destroy level');
+  }
 }

src/gameEvents.js

@@ -1,2 +1,3 @@
 export const GOAL_COLLISION = 'gc';
 export const ARCADIAN_ADDED = 'aa';
+export const LEVEL_COMPLETE = 'lc';