omelop/template/frontend/web/public/js/lib/pinusclient.js

[](https://travis-ci.org/node-omelop/omelop)

(function () {
  var isArray = Array.isArray;

  var root = this;

  function EventEmitter() {
  }


  if (typeof module !== 'undefined' && module.exports) {
    module.exports.EventEmitter = EventEmitter;
  }
  else {
    root = window;
    root.EventEmitter = EventEmitter;
  }

  // By default EventEmitters will print a warning if more than
  // 10 listeners are added to it. This is a useful default which
  // helps finding memory leaks.
  //
  // Obviously not all Emitters should be limited to 10. This function allows
  // that to be increased. Set to zero for unlimited.
  var defaultMaxListeners = 10;
  EventEmitter.prototype.setMaxListeners = function (n) {
    if (!this._events) this._events = {};
    this._maxListeners = n;
  };


  EventEmitter.prototype.emit = function () {
    var type = arguments[0];
    // If there is no 'error' event listener then throw.
    if (type === 'error') {
      if (!this._events || !this._events.error ||
        (isArray(this._events.error) && !this._events.error.length)) {
        if (this.domain) {
          var er = arguments[1];
          er.domain_emitter = this;
          er.domain = this.domain;
          er.domain_thrown = false;
          this.domain.emit('error', er);
          return false;
        }

        if (arguments[1] instanceof Error) {
          throw arguments[1]; // Unhandled 'error' event
        } else {
          throw new Error("Uncaught, unspecified 'error' event.");
        }
        return false;
      }
    }

    if (!this._events) return false;
    var handler = this._events[type];
    if (!handler) return false;

    if (typeof handler == 'function') {
      if (this.domain) {
        this.domain.enter();
      }
      switch (arguments.length) {
        // fast cases
        case 1:
          handler.call(this);
          break;
        case 2:
          handler.call(this, arguments[1]);
          break;
        case 3:
          handler.call(this, arguments[1], arguments[2]);
          break;
        // slower
        default:
          var l = arguments.length;
          var args = new Array(l - 1);
          for (var i = 1; i < l; i++) args[i - 1] = arguments[i];
          handler.apply(this, args);
      }
      if (this.domain) {
        this.domain.exit();
      }
      return true;

    } else if (isArray(handler)) {
      if (this.domain) {
        this.domain.enter();
      }
      var l = arguments.length;
      var args = new Array(l - 1);
      for (var i = 1; i < l; i++) args[i - 1] = arguments[i];

      var listeners = handler.slice();
      for (var i = 0, l = listeners.length; i < l; i++) {
        listeners[i].apply(this, args);
      }
      if (this.domain) {
        this.domain.exit();
      }
      return true;

    } else {
      return false;
    }
  };

  EventEmitter.prototype.addListener = function (type, listener) {
    if ('function' !== typeof listener) {
      throw new Error('addListener only takes instances of Function');
    }

    if (!this._events) this._events = {};

    // To avoid recursion in the case that type == "newListeners"! Before
    // adding it to the listeners, first emit "newListeners".
    this.emit('newListener', type, typeof listener.listener === 'function' ?
      listener.listener : listener);

    if (!this._events[type]) {
      // Optimize the case of one listener. Don't need the extra array object.
      this._events[type] = listener;
    } else if (isArray(this._events[type])) {

      // If we've already got an array, just append.
      this._events[type].push(listener);

    } else {
      // Adding the second element, need to change to array.
      this._events[type] = [this._events[type], listener];

    }

    // Check for listener leak
    if (isArray(this._events[type]) && !this._events[type].warned) {
      var m;
      if (this._maxListeners !== undefined) {
        m = this._maxListeners;
      } else {
        m = defaultMaxListeners;
      }

      if (m && m > 0 && this._events[type].length > m) {
        this._events[type].warned = true;
        console.error('(node) warning: possible EventEmitter memory ' +
          'leak detected. %d listeners added. ' +
          'Use emitter.setMaxListeners() to increase limit.',
          this._events[type].length);
        console.trace();
      }
    }

    return this;
  };

  EventEmitter.prototype.on = EventEmitter.prototype.addListener;

  EventEmitter.prototype.once = function (type, listener) {
    if ('function' !== typeof listener) {
      throw new Error('.once only takes instances of Function');
    }

    var self = this;
    function g() {
      self.removeListener(type, g);
      listener.apply(this, arguments);
    };

    g.listener = listener;
    self.on(type, g);

    return this;
  };

  EventEmitter.prototype.removeListener = function (type, listener) {
    if ('function' !== typeof listener) {
      throw new Error('removeListener only takes instances of Function');
    }

    // does not use listeners(), so no side effect of creating _events[type]
    if (!this._events || !this._events[type]) return this;

    var list = this._events[type];

    if (isArray(list)) {
      var position = -1;
      for (var i = 0, length = list.length; i < length; i++) {
        if (list[i] === listener ||
          (list[i].listener && list[i].listener === listener)) {
          position = i;
          break;
        }
      }

      if (position < 0) return this;
      list.splice(position, 1);
    } else if (list === listener ||
      (list.listener && list.listener === listener)) {
      delete this._events[type];
    }

    return this;
  };

  EventEmitter.prototype.removeAllListeners = function (type) {
    if (arguments.length === 0) {
      this._events = {};
      return this;
    }

    var events = this._events && this._events[type];
    if (!events) return this;

    if (isArray(events)) {
      events.splice(0);
    } else {
      this._events[type] = null;
    }

    return this;
  };

  EventEmitter.prototype.listeners = function (type) {
    if (!this._events) this._events = {};
    if (!this._events[type]) this._events[type] = [];
    if (!isArray(this._events[type])) {
      this._events[type] = [this._events[type]];
    }
    return this._events[type];
  }
})();

(function (exports, global) {

  var Protocol = exports;

  var HEADER = 5;

  var Message = function (id, route, body) {
    this.id = id;
    this.route = route;
    this.body = body;
  };

  /**
   *
   *pomele client encode
   * id message id;
   * route message route
   * msg message body
   * socketio current support string
   *
   */
  Protocol.encode = function (id, route, msg) {
    var msgStr = JSON.stringify(msg);
    if (route.length > 255) { throw new Error('route maxlength is overflow'); }
    var byteArray = new Uint16Array(HEADER + route.length + msgStr.length);
    var index = 0;
    byteArray[index++] = (id >> 24) & 0xFF;
    byteArray[index++] = (id >> 16) & 0xFF;
    byteArray[index++] = (id >> 8) & 0xFF;
    byteArray[index++] = id & 0xFF;
    byteArray[index++] = route.length & 0xFF;
    for (var i = 0; i < route.length; i++) {
      byteArray[index++] = route.charCodeAt(i);
    }
    for (var i = 0; i < msgStr.length; i++) {
      byteArray[index++] = msgStr.charCodeAt(i);
    }
    return bt2Str(byteArray, 0, byteArray.length);
  };




  /**
   *
   *client decode
   *msg String data
   *return Message Object
   */
  Protocol.decode = function (msg) {
    var idx, len = msg.length, arr = new Array(len);
    for (idx = 0; idx < len; ++idx) {
      arr[idx] = msg.charCodeAt(idx);
    }
    var index = 0;
    var buf = new Uint16Array(arr);
    var id = ((buf[index++] << 24) | (buf[index++]) << 16 | (buf[index++]) << 8 | buf[index++]) >>> 0;
    var routeLen = buf[HEADER - 1];
    var route = bt2Str(buf, HEADER, routeLen + HEADER);
    var body = bt2Str(buf, routeLen + HEADER, buf.length);
    return new Message(id, route, body);
  };

  var bt2Str = function (byteArray, start, end) {
    var result = "";
    for (var i = start; i < byteArray.length && i < end; i++) {
      result = result + String.fromCharCode(byteArray[i]);
    };
    return result;
  }

})('object' === typeof module ? module.exports : (this.Protocol = {}), this);

(function () {
  if (typeof Object.create !== 'function') {
    Object.create = function (o) {
      function F() { }
      F.prototype = o;
      return new F();
    };
  }

  var root = window;
  var omelop = Object.create(EventEmitter.prototype); // object extend from object
  root.omelop = omelop;
  var socket = null;
  var id = 1;
  var callbacks = {};

  omelop.init = function (params, cb) {
    omelop.params = params;
    params.debug = true;
    var host = params.host;
    var port = params.port;

    var url = 'ws://' + host;
    if (port) {
      url += ':' + port;
    }

    socket = io(url, { 'force new connection': true, reconnect: false });

    socket.on('connect', function () {
      console.log('[pinusclient.init] websocket connected!');
      if (cb) {
        cb(socket);
      }
    });

    socket.on('reconnect', function () {
      console.log('reconnect');
    });

    socket.on('message', function (data) {
      if (typeof data === 'string') {
        data = JSON.parse(data);
      }
      if (data instanceof Array) {
        processMessageBatch(omelop, data);
      } else {
        processMessage(omelop, data);
      }
    });

    socket.on('error', function (err) {
      console.log(err);
    });

    socket.on('disconnect', function (reason) {
      omelop.emit('disconnect', reason);
    });
  };

  omelop.disconnect = function () {
    if (socket) {
      socket.disconnect();
      socket = null;
    }
  };

  omelop.request = function (route) {
    if (!route) {
      return;
    }
    var msg = {};
    var cb;
    arguments = Array.prototype.slice.apply(arguments);
    if (arguments.length === 2) {
      if (typeof arguments[1] === 'function') {
        cb = arguments[1];
      } else if (typeof arguments[1] === 'object') {
        msg = arguments[1];
      }
    } else if (arguments.length === 3) {
      msg = arguments[1];
      cb = arguments[2];
    }
    msg = filter(msg, route);
    id++;
    callbacks[id] = cb;
    var sg = Protocol.encode(id, route, msg);
    socket.send(sg);
  };

  omelop.notify = function (route, msg) {
    this.request(route, msg);
  };

  var processMessage = function (omelop, msg) {
    var route;
    if (msg.id) {
      //if have a id then find the callback function with the request
      var cb = callbacks[msg.id];

      delete callbacks[msg.id];
      if (typeof cb !== 'function') {
        console.log('[pinusclient.processMessage] cb is not a function for request ' + msg.id);
        return;
      }

      cb(msg.body);
      return;
    }

    // server push message or old format message
    processCall(msg);

    //if no id then it should be a server push message
    function processCall(msg) {
      var route = msg.route;
      if (!!route) {
        if (!!msg.body) {
          var body = msg.body.body;
          if (!body) { body = msg.body; }
          omelop.emit(route, body);
        } else {
          omelop.emit(route, msg);
        }
      } else {
        omelop.emit(msg.body.route, msg.body);
      }
    }
  };

  var processMessageBatch = function (omelop, msgs) {
    for (var i = 0, l = msgs.length; i < l; i++) {
      processMessage(omelop, msgs[i]);
    }
  };

  function filter(msg, route) {
    if (route.indexOf('area.') === 0) {
      msg.areaId = omelop.areaId;
    }

    msg.timestamp = Date.now();
    return msg;
  }


})();