core2d/src/GamePad.mjs

Multiplatform 2D interaction engine

"use strict";

import { Axis } from "./Axis.mjs";
import { Command } from "./Command.mjs";
import { ButtonLayout } from "./ButtonLayout.mjs";
import { ButtonLayoutMap } from "./ButtonLayoutMap.mjs";
import { Input } from "./Input.mjs";
import { Static } from "./Static.mjs";

export class GamePad {
  constructor(id = 0) {
    this._id = id;
    this.analogThreshold = 0.5;
    this.layout = ButtonLayout.standard;
    const MODEL = Static.getGamepads()[id].id.toLowerCase();

    for (let id in ButtonLayoutMap) {
      if (MODEL.includes(id)) {
        this.layout = ButtonLayout[ButtonLayoutMap[id]];
      }
    }
  }

  get commands() {
    const BUTTONS = Input.getGamePadButtons(this._id);
    const RESULT = {};

    if (Input.getGamePadAxes(this._id)[Axis.LEFT_Y] < -this.analogThreshold) {
      RESULT[Command.UP] = true;
    } else if (
      Input.getGamePadAxes(this._id)[Axis.LEFT_Y] > this.analogThreshold
    ) {
      RESULT[Command.DOWN] = true;
    }

    if (Input.getGamePadAxes(this._id)[Axis.LEFT_X] < -this.analogThreshold) {
      RESULT[Command.LEFT] = true;
    } else if (
      Input.getGamePadAxes(this._id)[Axis.LEFT_X] > this.analogThreshold
    ) {
      RESULT[Command.RIGHT] = true;
    }

    for (let i in Command) {
      const BUTTON = BUTTONS[this.layout[i]];

      if (BUTTON && BUTTON.pressed) {
        RESULT[Command[i]] = true;
      }
    }

    return RESULT;
  }
}