sam-ecs/dist/ClientInputSharer.js

A specialized entity component system

'use strict';

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _get = function get(object, property, receiver) { if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { return get(parent, property, receiver); } } else if ("value" in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } };

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

//ClientInputSharer.js//

/**
 * @description - An input sharing model for the client
 * @author - Sam Faulkner
 */

//constants
var MAXIMUM_BUFFER_SIZE = 12;

//user imports
var Manager = require('./Manager.js');
var StateManager = require('./StateManager.js');

var InputSharer = function (_Manager) {
  _inherits(InputSharer, _Manager);

  function InputSharer(socket) {
    _classCallCheck(this, InputSharer);

    var _this = _possibleConstructorReturn(this, (InputSharer.__proto__ || Object.getPrototypeOf(InputSharer)).call(this));

    _this._user = null;

    _this.setMaxBufferSize(MAXIMUM_BUFFER_SIZE);
    _this._eventBuffer = new Array();

    _this._socket = socket;
    socket.on('CONNECTION', function () {
      socket.emit('BUFFER', MAXIMUM_BUFFER_SIZE - 4);
      socket.emit('ACKNOWLEDGE', { 'tick': _this._lastAcknowledgedState });
    });
    return _this;
  }

  /**
   * @description - Receives the checksum from the server and
   * verifies that the states are synchronized
   * @param {Object} data - the data received from the server
   */


  _createClass(InputSharer, [{
    key: 'receiveState',
    value: function receiveState(data) {
      var serverTick = data.tick;
      var stateObject = this._stateManager.getBufferedState(serverTick);
      if (!stateObject) {
        //we're really far behind!
      }
      var filteredStateObject = this._stateManager._getSubState(stateObject);

      var serializedStateObject = this._stateManager._serializeState(filteredStateObject);
      var checkSum = this._stateManager.generateCheckSum(serializedStateObject);
      if (data.checkSum !== checkSum) {
        console.log("We no matchy!");
      } else {
        console.log("We're good");
      }
    }

    /**
     * @description - Getter method for the socket
     * @returns {Socket}
     */

  }, {
    key: 'getSocket',
    value: function getSocket() {
      return this._socket;
    }

    /**
     * @description - Event emission side effect that buffers events before
     * sending them to the server
     * @param {Event} event - the event object that is to be emitted
     */

  }, {
    key: 'eventFun',
    value: function eventFun(event) {
      if (!event.local) {
        Object.assign(event, { 'tick': this._currentTick });
        this._eventBuffer.push(event);
      }
    }

    /** 
     * @description - Setter method for the user
     * @param {String} user - the new user value
     */

  }, {
    key: 'setUser',
    value: function setUser(user) {
      this._user = user;
    }

    /**
     * @description - Getter method for the user
     * @returns {String}
     */

  }, {
    key: 'getUser',
    value: function getUser() {
      return this._user;
    }

    /**
     * @description - Sends all the events in the buffer, then clears the buffer
     */

  }, {
    key: 'sendEvents',
    value: function sendEvents() {
      var _iteratorNormalCompletion = true;
      var _didIteratorError = false;
      var _iteratorError = undefined;

      try {
        for (var _iterator = this._eventBuffer[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
          var event = _step.value;

          this._socket.emit('EVENT', event);
        }
      } catch (err) {
        _didIteratorError = true;
        _iteratorError = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion && _iterator.return) {
            _iterator.return();
          }
        } finally {
          if (_didIteratorError) {
            throw _iteratorError;
          }
        }
      }

      this._eventBuffer.length = 0;
    }

    /**
     * @description - Update function that will send our buffered events to the server
     */

  }, {
    key: 'update',
    value: function update() {
      _get(InputSharer.prototype.__proto__ || Object.getPrototypeOf(InputSharer.prototype), 'update', this).call(this);
      this.sendEvents();
      this._currentTick++;
    }
  }]);

  return InputSharer;
}(Manager);