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[转载备份] 关于tradingView与websocket结合的可用案例

2021-11-11 10:28:50
 
585

自己使用tradingView比较早,在6月份就接入了tradingView,不过那时候国内使用tradingView的并不多,而且关于websocket的实现少之又少,并没有一个完整的实现

今天偶然见看到网上有一篇关于websocket实现tradingView的示例,故转载过来权当传播及备份

HTML部分:

<!DOCTYPE html>
<html>

    <head>
        <meta charset="utf-8" />
        <title></title>
    </head>

    <body>
        <div id="trade-view">
        </div>
        <script src="static/tradeview/charting_library/charting_library.min.js" type="text/javascript" charset="utf-8"></script>
        <script src="js/dataUpdater.js" type="text/javascript" charset="utf-8"></script>
        <script src="js/datafees.js" type="text/javascript" charset="utf-8"></script>
        <script src="js/socket.js" type="text/javascript" charset="utf-8"></script>
        <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
        <script>
            var count = 0;
            function TVjsApi() {
//                var urls = 'ws://*****';
//                var urls = 'ws://****/trade_market/websocket/btc_usdt'
                var urls = 'wss://api.fcoin.com/v2/ws';
                this.widgets = null;
                this.socket = new socket(urls);
//                this.socket = new socket();
                this.datafeeds = new datafeeds(this);
                this.symbol = null,
                    this.interval = null,
                    this.cacheData = {},
                    this.lastTime = null,
                    this.getBarTimer = null,
                    this.isLoading = true;
                var that = this;
                this.socket.doOpen()
                this.socket.on('open', function() {
                    that.socket.send({
                        cmd: 'req',
                        args: ["candle.M5.ethusdt", 150, parseInt(Date.now() / 1000)]
                    })
                })
                this.socket.on('message', that.onMessage)
            }
            TVjsApi.prototype.init = function() {
                //设置默认symbol,interval的默认值
                var symbol = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'ethusdt';
                var interval = arguments.length > 0 && arguments[1] !== undefined ? arguments[1] : 5;
                if (!this.widgets) {
                    this.widgets = window.tvWidget = new TradingView.widget({
                        //默认商品设置
                        symbol: symbol,
                        //默认请求间隔
                        interval: interval,
                        //默认是否全屏
                        // fullscreen: true,
                        //默认是否自适应
                        // autosize:true,    
                        //设置容器
                        container_id: 'trade-view',
                        datafeed: this.datafeeds,
                        library_path: './static/tradeview/charting_library/',                    
                        enabled_features: [],
                        timezone: 'Asia/Shanghai',
                        locale: 'zh',
                        debug: false,
                        //设置默认工具条背景颜色
                        toolbar_bg:"#121A2E",
                        //设置默认不显示组件
                        disabled_features: [
                            'header_symbol_search',
                            "use_localstorage_for_settings",
                            "left_toolbar",
                            'legend_context_menu',
                            "border_around_the_chart",
                            "timeframes_toolbar",
                            "volume_force_overlay",
                            "pane_context_menu",
                            "header_symbol_search",
                            "symbol_search_hot_key",
                            "header_undo_redo",
                            "header_compare",
                            "header_chart_type",
                            "header_screenshot",
                            "header_resolutions",
                            // "header_settings",
                            // "header_indicators"
                        ],
                        //设置初始化样式配置
                        overrides: {
                            "mainSeriesProperties.candleStyle.upColor": "#589065",
                            "mainSeriesProperties.candleStyle.downColor": "#AE4E54",
                            "mainSeriesProperties.candleStyle.drawWick": true,
                            "mainSeriesProperties.candleStyle.wickUpColor:": '#AE4E54',
                            "mainSeriesProperties.candleStyle.wickDownColor": "#AE4E54",
                            "mainSeriesProperties.candleStyle.drawBorder": true,
                            "mainSeriesProperties.candleStyle.borderUpColor": "#589065",
                            "mainSeriesProperties.candleStyle.borderDownColor": "#AE4E54",
                            //-----------------------------------------------------------------------
                            "paneProperties.background": "#121a2e",
                            "paneProperties.vertGridProperties.color": "#1e273c",
                            "paneProperties.vertGridProperties.style": 0,
                            "paneProperties.horzGridProperties.color": "#1e273c",
                            "paneProperties.horzGridProperties.style": 0,
                            "scalesProperties.lineColor": "#505d7b",
                            "scalesProperties.textColor": "#333e58",
                    
                            "paneProperties.legendProperties.showLegend": false,
                            //"scalesProperties.showLeftScale":false,
                        
                            "volumePaneSize": "medium",
                            "MACDPaneSize": "tiny",
                            
                            
                        },

                 //设置初始化加载条样式

                        loading_screen: {
                                "backgroundColor": "#1e222d",
                                "foregroundColor": "#5d7d93"
               },
                        studies_overrides: {        
                            //设置成交量默认样式
                            "volume.volume.color.0": "rgba(174,78,84,0.7)",
                            "volume.volume.color.1": "rgba(88,144,101,0.7)",
                        }
                    })
                    this.symbol = symbol
                    this.interval = interval
                    var thats = this.widgets;
                    this.widgets.onChartReady(function() {
                        //设置均线种类 均线样式
                        thats.chart().createStudy('Moving Average', false, false, [5], null, {'Plot.color': 'rgb(150, 95, 196)'});
                        thats.chart().createStudy('Moving Average', false, false, [10], null, {'Plot.color': 'rgb(116,149,187)'});
                        thats.chart().createStudy('Moving Average', false, false, [20],null,{"plot.color": "rgb(58,113,74)"});
                        thats.chart().createStudy('Moving Average', false, false, [30],null,{"plot.color": "rgb(118,32,99)"});
                        //设置自定义按钮种类 样式  事件
                        thats.createButton()
                            .attr('title', "1min").addClass("mydate")
                            .text("1min")
                            .on('click', function(e) {
                            $(this).parent().siblings().children().removeClass("clickBtn");
                            $(this).parent().siblings().children().addClass("mydate");
                            $(this).removeClass("mydate");
                            $(this).addClass("clickBtn");
                            thats.chart().setResolution('1', function onReadyCallback() {});
                            });
                        thats.createButton().addClass("clickBtn")
                            .attr('title', "5min")
                            .text("5min")
                            .on('click', function(e) {
                                    $(this).parent().siblings().children().removeClass("clickBtn");
                            $(this).parent().siblings().children().addClass("mydate");
                            $(this).removeClass("mydate");
                            $(this).addClass("clickBtn");
                            thats.chart().setResolution('5', function onReadyCallback() {});
                            });
                        thats.createButton().addClass("mydate")
                            .attr('title', "15min")
                            .text("15min")
                            .on('click', function(e) {
                                    $(this).parent().siblings().children().removeClass("clickBtn");
                            $(this).parent().siblings().children().addClass("mydate");
                            $(this).removeClass("mydate");
                            $(this).addClass("clickBtn");
                            thats.chart().setResolution('15', function onReadyCallback() {});
                            });
                        thats.createButton().addClass("mydate")
                            .attr('title', "30min")
                            .text("30min")
                            .css("background-color", "#4e5b85")
                            .on('click', function(e) {
                                    $(this).parent().siblings().children().removeClass("clickBtn");
                            $(this).parent().siblings().children().addClass("mydate");
                            $(this).removeClass("mydate");
                            $(this).addClass("clickBtn");
                            thats.chart().setResolution('30', function onReadyCallback() {});
                            });
                        thats.createButton().addClass("mydate")
                            .attr('title', "1hour")
                            .text("1hour")
                            .on('click', function(e) {
                                    $(this).parent().siblings().children().removeClass("clickBtn");
                            $(this).parent().siblings().children().addClass("mydate");
                            $(this).removeClass("mydate");
                            $(this).addClass("clickBtn");
                            thats.chart().setResolution('60', function onReadyCallback() {});
                            });
                        thats.createButton().addClass("mydate")
                            .attr('title', "4hour")
                            .text("4hour")
                            .on('click', function(e) {
                                    $(this).parent().siblings().children().removeClass("clickBtn");
                            $(this).parent().siblings().children().addClass("mydate");
                            $(this).removeClass("mydate");
                            $(this).addClass("clickBtn");
                            thats.chart().setResolution('240', function onReadyCallback() {});
                            });
                        
                        thats.createButton().addClass("mydate")
                            .attr('title', "1day")
                            .text("1day")
                            .on('click', function(e) {
                                    $(this).parent().siblings().children().removeClass("clickBtn");
                            $(this).parent().siblings().children().addClass("mydate");
                            $(this).removeClass("mydate");
                            $(this).addClass("clickBtn");
                            thats.chart().setResolution('1D', function onReadyCallback() {});
                            });
                        thats.createButton().addClass("mydate")
                            .attr('title', "5day")
                            .text("5day")
                            .on('click', function(e) {
                                    $(this).parent().siblings().children().removeClass("clickBtn");
                            $(this).parent().siblings().children().addClass("mydate");
                            $(this).removeClass("mydate");
                            $(this).addClass("clickBtn");
                            thats.chart().setResolution('5D', function onReadyCallback() {});
                            });
                        thats.createButton().addClass("mydate")
                            .attr('title', "1week")
                            .text("1week")
                            .on('click', function(e) {
                                    $(this).parent().siblings().children().removeClass("clickBtn");
                            $(this).parent().siblings().children().addClass("mydate");
                            $(this).removeClass("mydate");
                            $(this).addClass("clickBtn");
                            thats.chart().setResolution('1W', function onReadyCallback() {});
                            });
                        thats.createButton().addClass("mydate")
                            .attr('title', "1mon")
                            .text("1mon")
                            .on('click', function(e) {
                                    $(this).parent().siblings().children().removeClass("clickBtn");
                            $(this).parent().siblings().children().addClass("mydate");
                            $(this).removeClass("mydate");
                            $(this).addClass("clickBtn");
                            thats.chart().setResolution('1M', function onReadyCallback() {});
                            });    
                    })
                }
            }
            TVjsApi.prototype.sendMessage = function(data) {
                var that = this;
                console.log("这是要发送的数据:"+JSON.stringify(data) )
                if (this.socket.checkOpen()) {
                    this.socket.send(data)
                } else {
                    this.socket.on('open', function() {
                        that.socket.send(data)
                    })
                }
            }
            TVjsApi.prototype.unSubscribe = function(interval) {
                if (interval < 60) {
                    this.sendMessage({
                        cmd: 'unsub',
                        args: ["candle.M" + interval + "." + this.symbol.toLowerCase(), 1440, parseInt(Date.now() / 1000)]
                    })
                } else if (interval >= 60) {
                    this.sendMessage({
                        cmd: 'unsub',
                        args: ["candle.H" + (interval / 60) + "." + this.symbol.toLowerCase(), 1440, parseInt(Date.now() / 1000)]
                    })
                } else {
                    this.sendMessage({
                        cmd: 'unsub',
                        args: ["candle.D1." + this.symbol.toLowerCase(), 207, parseInt(Date.now() / 1000)]
                    })
                }
            }
            TVjsApi.prototype.subscribe = function() {
                if (this.interval < 60) {
                    this.sendMessage({
                        cmd: 'sub',
                        args: ["candle.M" + this.interval + "." + this.symbol.toLowerCase()]
                    })
                } else if (this.interval >= 60) {
                    this.sendMessage({
                        cmd: 'sub',
                        args: ["candle.H" + (this.interval / 60) + "." + this.symbol.toLowerCase()]
                    })
                } else {
                    this.sendMessage({
                        cmd: 'sub',
                        args: ["candle.D1." + this.symbol.toLowerCase()]
                    })
                }
            }
            TVjsApi.prototype.onMessage = function(data) {
                var thats = this.TVjsApi;
                count++;
                if(count<15){
                    console.log("这是后台返回的数据"+count+":"+JSON.stringify(data) )
                }
                
                if (data.data && data.data.length) {
                    var list = []
                    var ticker = thats.symbol + "-" + thats.interval;
                    var that = thats;
                    data.data.forEach(function(element) {
                        list.push({
                            time: that.interval !== 'D' || that.interval !== '1D' ? element.id * 1000 : element.id,
                            open: element.open,
                            high: element.high,
                            low: element.low,
                            close: element.close,
                            volume: element.quote_vol
                        })
                    }, that)
                    thats.cacheData[ticker] = list
                    thats.lastTime = list[list.length - 1].time
                    thats.subscribe()
                }
                if (data.type && data.type.indexOf(thats.symbol.toLowerCase()) !== -1) {
                    // console.log(' >> sub:', data.type)
                    thats.datafeeds.barsUpdater.updateData()
                    var ticker = thats.symbol + "-" + thats.interval;
                    var barsData = {
                        time: data.id * 1000,
                        open: data.open,
                        high: data.high,
                        low: data.low,
                        close: data.close,
                        volume: data.quote_vol
                    }
                    if (barsData.time >= thats.lastTime && thats.cacheData[ticker] && thats.cacheData[ticker].length) {
                        thats.cacheData[ticker][thats.cacheData[ticker].length - 1] = barsData
                    }
                }
            }
            TVjsApi.prototype.getBars = function(symbolInfo, resolution, rangeStartDate, rangeEndDate, onLoadedCallback) {
                // console.log(' >> :', rangeStartDate, rangeEndDate)
                if (this.interval !== resolution) {
                    this.unSubscribe(this.interval)
                    this.interval = resolution
                    if (resolution < 60) {
                        this.sendMessage({
                            cmd: 'req',
                            args: ["candle.M" + this.interval + "." + this.symbol.toLowerCase(), 1440, parseInt(Date.now() / 1000)]
                        })
                    } else if (resolution >= 60) {
                        this.sendMessage({
                            cmd: 'req',
                            args: ["candle.H" + (this.interval / 60) + "." + this.symbol.toLowerCase(), 1440, parseInt(Date.now() / 1000)]
                        })
                    } else {
                        this.sendMessage({
                            cmd: 'req',
                            args: ["candle.D1." + this.symbol.toLowerCase(), 800, parseInt(Date.now() / 1000)]
                        })
                    }
                }
                var ticker = this.symbol + "-" + this.interval
                if (this.cacheData[ticker] && this.cacheData[ticker].length) {
                    this.isLoading = false
                    var newBars = []
                    this.cacheData[ticker].forEach(item => {
                        if (item.time >= rangeStartDate * 1000 && item.time <= rangeEndDate * 1000) {
                            newBars.push(item)
                        }
                    })
                    onLoadedCallback(newBars)
                } else {
                    var self = this
                    this.getBarTimer = setTimeout(function() {
                        self.getBars(symbolInfo, resolution, rangeStartDate, rangeEndDate, onLoadedCallback)
                    }, 10)
                }
            }
            var TVjsApi = new TVjsApi();
            TVjsApi.init()
        </script>
    </body>

</html>

socket.js部分:

'use strict';


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

var socket = function () {
  function socket() {
    var url = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'wss://api.fcoin.com/v2/ws';
    var options = arguments[1];

    _classCallCheck(this, socket);

    this.heartBeatTimer = null;
    this.options = options;
    this.messageMap = {};
    this.connState = 0;
    this.socket = null;
    this.url = url;
  }

  socket.prototype.doOpen = function doOpen() {
    var _this = this;
    console.log("我被调用了")
    if (this.connState) return;
    this.connState = 1;
    this.afterOpenEmit = [];
    var BrowserWebSocket = window.WebSocket || window.MozWebSocket;
    var socket = new BrowserWebSocket(this.url);
    socket.binaryType = 'arraybuffer';
    socket.onopen = function (evt) {
      return _this.onOpen(evt);
    };
    socket.onclose = function (evt) {
      return _this.onClose(evt);
    };
    socket.onmessage = function (evt) {
      return _this.onMessage(evt.data);
    };
    socket.onerror = function (err) {
      return _this.onError(err);
    };
    this.socket = socket;
  };

  socket.prototype.onOpen = function onOpen(evt) {
    this.connState = 2;
    this.heartBeatTimer = setInterval(this.checkHeartbeat.bind(this), 20000);
    this.onReceiver({ Event: 'open' });
  };

  socket.prototype.checkOpen = function checkOpen() {
    return this.connState === 2;
  };

  socket.prototype.onClose = function onClose() {
    this.connState = 0;
    if (this.connState) {
      this.onReceiver({ Event: 'close' });
    }
  };

  socket.prototype.send = function send(data) {
    this.socket.send(JSON.stringify(data));
  };

  socket.prototype.emit = function emit(data) {
    var _this2 = this;

    return new Promise(function (resolve) {
      _this2.socket.send(JSON.stringify(data));
      _this2.on('message', function (data) {
        resolve(data);
      });
    });
  };

  socket.prototype.onMessage = function onMessage(message) {
    try {
      var data = JSON.parse(message);
      this.onReceiver({ Event: 'message', Data: data });
    } catch (err) {
      console.error(' >> Data parsing error:', err);
    }
  };

  socket.prototype.checkHeartbeat = function checkHeartbeat() {
    var data = {
      'cmd': 'ping',
      'args': [Date.parse(new Date())]
    };
    this.send(data);
  };

  socket.prototype.onError = function onError(err) {};

  socket.prototype.onReceiver = function onReceiver(data) {
    var callback = this.messageMap[data.Event];
    if (callback) callback(data.Data);
  };

  socket.prototype.on = function on(name, handler) {
    this.messageMap[name] = handler;
  };

  socket.prototype.doClose = function doClose() {
    this.socket.close();
  };

  socket.prototype.destroy = function destroy() {
    if (this.heartBeatTimer) {
      clearInterval(this, this.heartBeatTimer);
      this.heartBeatTimer = null;
    }
    this.doClose();
    this.messageMap = {};
    this.connState = 0;
    this.socket = null;
  };

  return socket;
}();

datafees.js部分:

'use strict';

var _dataUpdater2 = _interopRequireDefault(dataUpdater);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } /**
                                                                                                                                                           * JS API
                                                                                                                                                           */
var datafeeds = function () {

  /**
   * JS API
   * @param {*Object} vue vue实例
   */
  function datafeeds(vue) {
    _classCallCheck(this, datafeeds);

    this.self = vue;
    this.barsUpdater = new _dataUpdater2.default(this);
  }

  /**
   * @param {*Function} callback  回调函数
   * `onReady` should return result asynchronously.
   */


  datafeeds.prototype.onReady = function onReady(callback) {
    var _this = this;

    return new Promise(function (resolve, reject) {
      var configuration = _this.defaultConfiguration();
      if (_this.self.getConfig) {
        configuration = Object.assign(_this.defaultConfiguration(), _this.self.getConfig());
      }
      resolve(configuration);
    }).then(function (data) {
      return callback(data);
    });
  };

  /**
   * @param {*String} symbolName  商品名称或ticker
   * @param {*Function} onSymbolResolvedCallback 成功回调 
   * @param {*Function} onResolveErrorCallback   失败回调
   * `resolveSymbol` should return result asynchronously.
   */


  datafeeds.prototype.resolveSymbol = function resolveSymbol(symbolName, onSymbolResolvedCallback, onResolveErrorCallback) {
    var _this2 = this;

    return new Promise(function (resolve, reject) {
      var symbolInfo = _this2.defaultSymbol();
      if (_this2.self.getSymbol) {
        symbolInfo = Object.assign(_this2.defaultSymbol(), _this2.self.getSymbol());
      }
      resolve(symbolInfo);
    }).then(function (data) {
      return onSymbolResolvedCallback(data);
    }).catch(function (err) {
      return onResolveErrorCallback(err);
    });
  };

  /**
   * @param {*Object} symbolInfo  商品信息对象
   * @param {*String} resolution  分辨率
   * @param {*Number} rangeStartDate  时间戳、最左边请求的K线时间
   * @param {*Number} rangeEndDate  时间戳、最右边请求的K线时间
   * @param {*Function} onDataCallback  回调函数
   * @param {*Function} onErrorCallback  回调函数
   */


  datafeeds.prototype.getBars = function getBars(symbolInfo, resolution, rangeStartDate, rangeEndDate, onDataCallback, onErrorCallback) {
    var onLoadedCallback = function onLoadedCallback(data) {

                 if(data&&LastLength!=data.length){
                        onDataCallback(data, { noData: false });
                 }else{
                         onDataCallback([], { noData: true });
                }
                 LastLength = data.length;

 

//或者可以这样写:
      data && data.length ? onDataCallback(data, { noData: true }) : onDataCallback([], { noData: true });
    };
    this.self.getBars(symbolInfo, resolution, rangeStartDate, rangeEndDate, onLoadedCallback);
  };

  /**
   * 订阅K线数据。图表库将调用onRealtimeCallback方法以更新实时数据
   * @param {*Object} symbolInfo 商品信息
   * @param {*String} resolution 分辨率
   * @param {*Function} onRealtimeCallback 回调函数 
   * @param {*String} subscriberUID 监听的唯一标识符
   * @param {*Function} onResetCacheNeededCallback (从1.7开始): 将在bars数据发生变化时执行
   */


  datafeeds.prototype.subscribeBars = function subscribeBars(symbolInfo, resolution, onRealtimeCallback, subscriberUID, onResetCacheNeededCallback) {
    this.barsUpdater.subscribeBars(symbolInfo, resolution, onRealtimeCallback, subscriberUID, onResetCacheNeededCallback);
  };

  /**
   * 取消订阅K线数据
   * @param {*String} subscriberUID 监听的唯一标识符
   */


  datafeeds.prototype.unsubscribeBars = function unsubscribeBars(subscriberUID) {
    this.barsUpdater.unsubscribeBars(subscriberUID);
  };

  /**
   * 默认配置
   */


  datafeeds.prototype.defaultConfiguration = function defaultConfiguration() {
      //设置默认配置
    return {
      supports_search: false,
      supports_group_request: false,
      supported_resolutions: ['1', '5', '15', '30', '60', '240','1D', '5D', '1W', '1M'],
      supports_marks: true,
      supports_timescale_marks: true,
      supports_time: true
    };
  };

  /**
   * 默认商品信息
   */


  datafeeds.prototype.defaultSymbol = function defaultSymbol() {
    return {
      'name': 'BTCUSDT',
      'timezone': 'Asia/Shanghai',
      'minmov': 1,
      'minmov2': 0,
      'pointvalue': 1,
      'fractional': false,
      //设置周期
      'session': '24x7',
      'has_intraday': true,
      'has_no_volume': false,  
       //设置是否支持周月线
       "has_daily":true,
       //设置是否支持周月线
       "has_weekly_and_monthly":true,
      'description': 'BTCUSDT',
          //设置精度  100表示保留两位小数   1000三位   10000四位
      'pricescale': 100,
      'ticker': 'BTCUSDT',
      'supported_resolutions': ['1', '5', '15', '30', '60', '240','1D', '5D', '1W', '1M']
    };
  };

  return datafeeds;
}();

dataUpdater.js部分:

'use strict';


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

/**
 * 数据更新器
 * 通过更新器触发datafeeds的getBars实时更新图表数据
 */
var dataUpdater = function () {
  function dataUpdater(datafeeds) {
    _classCallCheck(this, dataUpdater);

    this.subscribers = {};
    this.requestsPending = 0;
    this.historyProvider = datafeeds;
  }

  dataUpdater.prototype.subscribeBars = function subscribeBars(symbolInfo, resolution, newDataCallback, listenerGuid) {
    this.subscribers[listenerGuid] = {
      lastBarTime: null,
      listener: newDataCallback,
      resolution: resolution,
      symbolInfo: symbolInfo
    };
  };

  dataUpdater.prototype.unsubscribeBars = function unsubscribeBars(listenerGuid) {
    delete this.subscribers[listenerGuid];
  };

  dataUpdater.prototype.updateData = function updateData() {
    var _this = this;

    if (this.requestsPending) return;
    this.requestsPending = 0;
    for (var listenerGuid in this.subscribers) {
      this.requestsPending++;
      this.updateDataForSubscriber(listenerGuid).then(function () {
        return _this.requestsPending--;
      }).catch(function () {
        return _this.requestsPending--;
      });
    }
  };

  dataUpdater.prototype.updateDataForSubscriber = function updateDataForSubscriber(listenerGuid) {
    var _this2 = this;

    return new Promise(function (resolve, reject) {
      var subscriptionRecord = _this2.subscribers[listenerGuid];
      var rangeEndTime = parseInt((Date.now() / 1000).toString());
      var rangeStartTime = rangeEndTime - _this2.periodLengthSeconds(subscriptionRecord.resolution, 10);
      _this2.historyProvider.getBars(subscriptionRecord.symbolInfo, subscriptionRecord.resolution, rangeStartTime, rangeEndTime, function (bars) {
        _this2.onSubscriberDataReceived(listenerGuid, bars);
        resolve();
      }, function () {
        reject();
      });
    });
  };

  dataUpdater.prototype.onSubscriberDataReceived = function onSubscriberDataReceived(listenerGuid, bars) {
    if (!this.subscribers.hasOwnProperty(listenerGuid)) return;
    if (!bars.length) return;
    var lastBar = bars[bars.length - 1];
    var subscriptionRecord = this.subscribers[listenerGuid];
    if (subscriptionRecord.lastBarTime !== null && lastBar.time < subscriptionRecord.lastBarTime) return;
    var isNewBar = subscriptionRecord.lastBarTime !== null && lastBar.time > subscriptionRecord.lastBarTime;
    if (isNewBar) {
      if (bars.length < 2) {
        throw new Error('Not enough bars in history for proper pulse update. Need at least 2.');
      }

      var previousBar = bars[bars.length - 2];
      subscriptionRecord.listener(previousBar);
    }

    subscriptionRecord.lastBarTime = lastBar.time;
    subscriptionRecord.listener(lastBar);
  };

  dataUpdater.prototype.periodLengthSeconds = function periodLengthSeconds(resolution, requiredPeriodsCount) {
    var daysCount = 0;
    if (resolution === 'D' || resolution === '1D') {
      daysCount = requiredPeriodsCount;
    } else if (resolution === 'M' || resolution === '1M') {
      daysCount = 31 * requiredPeriodsCount;
    } else if (resolution === 'W' || resolution === '1W') {
      daysCount = 7 * requiredPeriodsCount;
    } else {
      daysCount = requiredPeriodsCount * parseInt(resolution) / (24 * 60);
    }
    return daysCount * 24 * 60 * 60;
  };

  return dataUpdater;
}();


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