node-haxball/examples/plugins/slidingAvatar.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, Callback, Utils, Room, Replay, Query, Library, RoomConfig, Plugin, Renderer, Errors, Language, Impl } = API;

  Object.setPrototypeOf(this, Plugin.prototype);
  Plugin.call(this, "slidingAvatar", false, {
    version: "0.1",
    author: "JerryOldson",
    description: `This plugin will slide the characters of your avatar.`,
    allowFlags: AllowFlags.JoinRoom | AllowFlags.CreateRoom
  });

  this.defineVariable({
    name: "avatar",
    description: "The avatar you want to have.",
    type: VariableType.String,
    value: "JerryOldson"
  });

  this.defineVariable({
    name: "slideInterval",
    description: "This variable is used to determine the frequency of sliding in miliseconds",
    type: VariableType.Number,
    value: 500,
    range: {
      min: 0,
      step: 1
    }
  });

  var that = this, avatarIndex = -1, interval;

  function slideAvatar() {
    if (that.active) {
      let newAvatar;
      if (avatarIndex === -1) {
        newAvatar = that.avatar.substr(avatarIndex + 1, 1);
      } else {
        newAvatar = that.avatar.substr(avatarIndex, 2);
      }
      that.room.setAvatar(newAvatar);
      avatarIndex++;
      if (avatarIndex >= that.avatar.length) avatarIndex = -1;
    }
  };

  this.initialize = () => {
    Utils.runAfterGameTick(() => {
      interval = setInterval(slideAvatar, that.slideInterval);
    }, 1);
  };

  this.finalize = () => {
    that = null;
    avatarIndex = null;
    clearInterval(interval);
    interval = null;
  };

  this.onVariableValueChange = (addonObject, variableName, oldValue, newValue) => {
    if (addonObject == that && variableName == "slideInterval") {
      clearInterval(interval);
      interval = setInterval(slideAvatar, newValue);
    }
  };

  // snapshot support

  this.takeSnapshot = function(){
    var { avatar, slideInterval } = that;
    return {
      avatar,
      slideInterval,
      avatarIndex
    };
  };

  this.useSnapshot = function(snapshot){
    var {
      avatar,
      slideInterval
    } = snapshot;
    Object.assign(that, {
      avatar,
      slideInterval
    });
    avatarIndex = snapshot.avatarIndex;
  };
}