feat(#10): remove redundancy

modules/event-emitter.js

@@ -1,32 +1,27 @@
-class EventEmitterSingleton {
+export class EventEmitter {
   static instance;
-  eventEmitter;
+  events;
 
   constructor() {
-    this.eventEmitter = {};
+    if (!EventEmitter.instance) {
+      EventEmitter.instance = this;
+      this.events = {};
     }
-
+    return EventEmitter.instance;
-  static getInstance() {
-    if (!EventEmitterSingleton.instance) {
-      EventEmitterSingleton.instance = new EventEmitterSingleton();
-    }
-    return EventEmitterSingleton.instance;
   }
 
   on(eventName, callback) {
-    if (!this.eventEmitter[eventName]) {
+    if (!this.events[eventName]) {
-      this.eventEmitter[eventName] = [];
+      this.events[eventName] = [];
     }
-    this.eventEmitter[eventName].push(callback);
+    this.events[eventName].push(callback);
   }
 
   emit(eventName, ...args) {
-    if (this.eventEmitter[eventName]) {
+    if (this.events[eventName]) {
-      this.eventEmitter[eventName].forEach((callback) => {
+      this.events[eventName].forEach((callback) => {
         callback(...args);
       });
     }
   }
 }
-
-export const eventEmitter = EventEmitterSingleton.getInstance();

modules/game-objects/camera.js

@@ -10,12 +10,7 @@ export class Camera extends GameObject {
     height = GAME_HEIGHT,
     speed = 1,
   }) {
-    super({ x, y });
+    super({ x, y, gameObjects, width, height });
-    this.gameObjects = gameObjects;
-    this.x = x;
-    this.y = y;
-    this.width = width;
-    this.height = height;
     this.speed = speed;
     this.keys = [
       { key: "ArrowUp", pressed: false, value: [0, -1] },

modules/game-objects/game-object.js

@@ -1,4 +1,4 @@
-import { eventEmitter } from "../event-emitter.js";
+import { EventEmitter } from "../event-emitter.js";
 
 export class GameObject {
   constructor(options = {}) {
@@ -16,7 +16,7 @@ export class GameObject {
     this.height = height;
     this.gameObjects = gameObjects;
     this.debug = debug;
-    this.eventEmitter = eventEmitter;
+    this.eventEmitter = new EventEmitter();
   }
 
   async load() {
@@ -52,9 +52,7 @@ export class GameObject {
   }
 
   onMouseClick(elementId) {
-    if (elementId === "debug") {
+    if (elementId === "debug") this.debug = !this.debug;
-      this.debug = !this.debug;
-    }
     this.gameObjects.forEach((item) => {
       item.onMouseClick(elementId);
     });

modules/game-objects/map-management.js

@@ -3,8 +3,7 @@ import { Map } from "./map.js";
 
 export class MapManagement extends GameObject {
   constructor({ maps = [] }) {
-    super();
+    super({ gameObjects: maps.map((item) => new Map(item)) });
-    this.gameObjects = maps.map((item) => new Map(item));
     this.elementsId = this.gameObjects.map((item) => item.elementId);
   }
 

modules/game-objects/map.js

@@ -3,15 +3,8 @@ import { createCanvas } from "../utils.js";
 import { GameObject } from "./game-object.js";
 
 export class Map extends GameObject {
-  constructor({
+  constructor({ name, imageId, elementId, layer = 0, selected = false }) {
-    name,
+    super();
-    imageId,
-    elementId,
-    layer = 0,
-    selected = false,
-    debug = false,
-  }) {
-    super({ debug });
     this.name = name;
     this.imageId = imageId;
     this.layer = layer;
@@ -20,7 +13,6 @@ export class Map extends GameObject {
     this.imageHeight = this.image.height;
     this.selected = selected;
     this.elementId = elementId;
-    this.debug = debug;
   }
 
   async load() {
@@ -52,7 +44,8 @@ export class Map extends GameObject {
         if (row < 0 || col < 0 || row >= this.height || col >= this.width)
           continue;
 
-        if (this.debug) {
+        const tile = this.data[row * this.width + col] - 1;
+        if (this.debug && tile > -1) {
           ctx.strokeRect(
             col * TILE_SIZE,
             row * TILE_SIZE,
@@ -61,7 +54,6 @@ export class Map extends GameObject {
           );
         }
 
-        const tile = this.data[row * this.width + col] - 1;
         ctx.drawImage(
           this.image,
           (tile * TILE_SIZE) % this.imageWidth,
@@ -80,10 +72,8 @@ export class Map extends GameObject {
   }
 
   onMouseClick(elementId) {
-    if (elementId === "debug") {
+    super.onMouseClick(elementId);
-      this.debug = !this.debug;
+    if (elementId === "debug") this._level = null;
-      this._level = null;
-    }
   }
 
   render(ctx, sourceX, sourceY, width, height) {