bitso-streams/lib/WsOrderBookStream.js

Stream bitso websocket data

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = WsOrderBookStream;

var _bitsoWs = require('bitso-ws');

var _bitsoWs2 = _interopRequireDefault(_bitsoWs);

var _stream = require('stream');

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

function WsOrderBookStream() {
  const orderBookStream = new _stream.Readable();
  let bitso;

  const readOrderBook = data => orderBookStream.push(JSON.stringify(data));

  orderBookStream._read = () => {
    if (!orderBookStream.started) {
      orderBookStream.started = true;
      bitso = new _bitsoWs2.default({
        orders: true
      });

      bitso.on('data', readOrderBook);
    }
  };

  return orderBookStream;
}