caa-game/src/entities/chest.js

var asdf = require("asdf-games");
// eslint-disable-next-line no-unused-vars
const { Texture, Sound, TileSprite, entity } = asdf;

const texture = new Texture(__dirname + "/../../res/images/tilemap.png");
const sounds = {
  forbidden: new Sound(__dirname + "/../../res/sounds/forbidden.wav"),
  obtain: new Sound(__dirname + "/../../res/sounds/obtain.wav", { volume: 0.1 })
};

const Pointer = require("./pointer.js");

const state = {
  open: 0,
  closed: 1
};

const frames = {
  closed: { x: 2, y: 6 },
  open: { x: 3, y: 6 }
};

class Chest extends TileSprite {
  constructor(pos, player, keys, level, action) {
    super(texture, 32, 32);
    this.pos = pos;
    this.scale = { x: 1, y: 1 };

    this.frame = frames.closed;
    this.state = state.closed;
    this.player = player;
    this.keys = keys;
    this.action = action;
    this.level = level;

    this.pointer = false;
    this.pressed = false;

    this.hitBox = {
      x: 1,
      y: 1,
      w: 28,
      h: 28
    };
  }
    
  update(dt) {
    super.update(dt);

    if (entity.hit(this, this.player)) {
      if (!this.pointer) {
        var pointer = new Pointer({ 
          x: (this.pos.x + this.tileW / 2) - 8, 
          y: this.pos.y - 16
        });
        this.level.entities.add(pointer);
        this.pointer = pointer;
      }

      if (this.state == state.closed) {
        this.pointer.anims.play("white");
      } else {
        this.pointer.anims.play("red");
      }

      if (this.keys.action) {
        if (this.state == state.closed) {
          this.state = state.open;
          this.pressed = true;
          this.action();          
          sounds.obtain.play();
        } else {
          if (!sounds.forbidden.playing && !this.pressed) {
            sounds.forbidden.play();
            this.pressed = true;
          }
        }
      } else {
        this.pressed = false;
      }

    } else {
      this.level.entities.remove(this.pointer);
      this.pointer = false;
    }

    if (this.state == state.closed) {
      this.frame = frames.closed;
    } else if (this.state == state.open) {
      this.frame = frames.open;
    }
  }
}

module.exports = Chest;