node-haxball/examples/roomConfigs/method1/modifyPlayerInput.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

const { OperationType, VariableType, ConnectionState, AllowFlags, Direction, CollisionFlags, CameraFollow, BackgroundType, GamePlayState, Callback, Utils, Room, Replay, Query, Library, RoomConfig, Plugin, Renderer, Errors, Language, Impl } = API = require("../../../src/index");

function roomCallback(room){ // examples start from here.

  var staticInputs = {};

  var setPlayerInput = function(playerId, value){
    if (!room.getPlayer(playerId))
      return;
    /*
    if (!inputPermitted[byPlayerId]) // example for custom permission logic
      return;
    */
    staticInputs[playerId] = (isNaN(value) || value<0 || value>31) ? null : value;  // store a static input value for this player
  };

  // keep in mind that room.onBeforeOperationReceived already has a default callback value. It parses chat messages and returns the result as customData.
  // if you need to insert custom logic before plugins are running, and you still want the original to also run, you may store the original callback value 
  // in a variable just after room is created and later use it inside your own room.onBeforeOperationReceived.
  room.onOperationReceived = function(type, msg, globalFrameNo, clientFrameNo, customData){ // this is host-only
    var playerId = msg.byId;
    switch (type){
      case OperationType.SendChat: {
        /*
        var m = msg.text;
        if (m.startsWith("!")){  // custom chat logic for extra commands
        */
        if (customData.isCommand){ // same as above 2 lines.
          var arr = customData.data; // same as var arr = m.trimEnd().split(" ");
          switch (arr[0]){
            case "!input":
              setPlayerInput(parseInt(arr[1]), parseInt(arr[2]));
              break;
          }
          //return false; // You may block this event from being processed by doing this. 
          // However, room.onAfterOperationReceived already has a default value. It blocks all command chat messages from being sent to clients, 
          // after it is received by all plugins. You may modify it to your needs.
        }
        break;
      }
      case OperationType.SendInput: { // this event runs only when player presses/releases a key
        var input = staticInputs[playerId]; // get a static input value for the player who sent this event.
        if (input != null) // if it exists,
          msg.input = input; // set the event's input value to it.
        break;
      }
    }
    return true;
  };

  room.onPlayerLeave = (playerObj, reason, isBanned, byId, customData) => {
    // get player's id
    var id = playerObj.id;

    // free extra memory allocated
    delete staticInputs[id];
  };

}