node-haxball/examples/plugins/CMD_chess_clientSide.js

The most powerful and lightweight API that allows you to develop your original Haxball(www.haxball.com) host, client, and standalone applications both on node.js and browser environments and also includes every possible hack and functionality that you can

module.exports = function(API){
  const { OperationType, VariableType, ConnectionState, AllowFlags, Direction, CollisionFlags, CameraFollow, BackgroundType, GamePlayState, BanEntryType, Callback, Utils, Room, Replay, Query, Library, RoomConfig, Plugin, Renderer, Errors, Language, EventFactory, Impl } = API;

  Object.setPrototypeOf(this, Plugin.prototype);
  Plugin.call(this, "CMD_chess_clientSide", true, { // "CMD_chess_clientSide" is plugin's name, "true" means "activated just after initialization". Every plugin should have a unique name.
    version: "0.1",
    author: "abc",
    description: `This plugin allows mouse clicks on the client side while playing chess using custom clients.`,
    allowFlags: AllowFlags.JoinRoom // We allow this plugin to be activated on JoinRoom only.
  });

  var mouseRightClickPos = null, that = this;

  this.onGameStart = function(){
    mouseRightClickPos = null;
  };

  this.onMouseDown = function(e){
    var f = that.room?.renderer?.transformPixelCoordToMapCoord;
    if (!f){
      mouseRightClickPos = null;
      return;
    }
    var {x,y} = f(e.offsetX, e.offsetY);
    if (e.button==2){
      mouseRightClickPos = {x, y};
      return;
    }
    mouseRightClickPos = null;
    that.room.sendCustomEvent(60, {t: 1, x, y});
  };

  this.onMouseUp = function(e){
    var f = that.room?.renderer?.transformPixelCoordToMapCoord;
    if (!f || e.button!=2){
      mouseRightClickPos = null;
      return;
    }
    that.room.sendCustomEvent(60, {t: 0, p1: mouseRightClickPos, p2: f(e.offsetX, e.offsetY)});
    mouseRightClickPos = null;
  };
}