@graffy/common/graph/mergeStreams.js

Common libraries that used by various Graffy modules.

"use strict";

var _interopRequireDefault = require("@babel/runtime-corejs3/helpers/interopRequireDefault");

exports.__esModule = true;
exports["default"] = mergeStreams;

var _regenerator = _interopRequireDefault(require("@babel/runtime-corejs3/regenerator"));

var _getIterator2 = _interopRequireDefault(require("@babel/runtime-corejs3/core-js/get-iterator"));

var _isArray3 = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/array/is-array"));

var _some = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/instance/some"));

var _promise = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/promise"));

var _map = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/instance/map"));

var _wrapAsyncGenerator2 = _interopRequireDefault(require("@babel/runtime-corejs3/helpers/wrapAsyncGenerator"));

var _awaitAsyncGenerator2 = _interopRequireDefault(require("@babel/runtime-corejs3/helpers/awaitAsyncGenerator"));

var _asyncIterator2 = _interopRequireDefault(require("@babel/runtime-corejs3/helpers/asyncIterator"));

var _asyncGeneratorDelegate2 = _interopRequireDefault(require("@babel/runtime-corejs3/helpers/asyncGeneratorDelegate"));

var _mergeAsyncIterators = _interopRequireDefault(require("merge-async-iterators"));

var _merge = _interopRequireDefault(require("./merge"));

function mergeStreams() {
  return _mergeStreams.apply(this, arguments);
}

function _mergeStreams() {
  _mergeStreams = (0, _wrapAsyncGenerator2["default"])(
  /*#__PURE__*/
  _regenerator["default"].mark(function _callee() {
    var _context;

    var _len,
        streams,
        _key,
        firstValues,
        _iterator,
        _isArray,
        _i,
        _ref,
        value,
        merged,
        _iterator2,
        _isArray2,
        _i2,
        _ref2,
        _value,
        _args = arguments;

    return _regenerator["default"].wrap(function _callee$(_context2) {
      while (1) {
        switch (_context2.prev = _context2.next) {
          case 0:
            for (_len = _args.length, streams = new Array(_len), _key = 0; _key < _len; _key++) {
              streams[_key] = _args[_key];
            }

            _context2.t0 = _map["default"];
            _context2.next = 4;
            return (0, _awaitAsyncGenerator2["default"])(_promise["default"].all((0, _map["default"])(streams).call(streams, function (stream) {
              return stream.next();
            })));

          case 4:
            _context2.t1 = _context = _context2.sent;
            _context2.t2 = _context;

            _context2.t3 = function (iter) {
              return iter.value;
            };

            firstValues = (0, _context2.t0)(_context2.t1).call(_context2.t2, _context2.t3);

            if (!(0, _some["default"])(firstValues).call(firstValues, function (value) {
              return typeof value === 'undefined';
            })) {
              _context2.next = 30;
              break;
            }

            _context2.next = 11;
            return undefined;

          case 11:
            _iterator = firstValues, _isArray = (0, _isArray3["default"])(_iterator), _i = 0, _iterator = _isArray ? _iterator : (0, _getIterator2["default"])(_iterator);

          case 12:
            if (!_isArray) {
              _context2.next = 18;
              break;
            }

            if (!(_i >= _iterator.length)) {
              _context2.next = 15;
              break;
            }

            return _context2.abrupt("break", 28);

          case 15:
            _ref = _iterator[_i++];
            _context2.next = 22;
            break;

          case 18:
            _i = _iterator.next();

            if (!_i.done) {
              _context2.next = 21;
              break;
            }

            return _context2.abrupt("break", 28);

          case 21:
            _ref = _i.value;

          case 22:
            value = _ref;

            if (!(typeof value !== 'undefined')) {
              _context2.next = 26;
              break;
            }

            _context2.next = 26;
            return value;

          case 26:
            _context2.next = 12;
            break;

          case 28:
            _context2.next = 48;
            break;

          case 30:
            merged = [];
            _iterator2 = firstValues, _isArray2 = (0, _isArray3["default"])(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : (0, _getIterator2["default"])(_iterator2);

          case 32:
            if (!_isArray2) {
              _context2.next = 38;
              break;
            }

            if (!(_i2 >= _iterator2.length)) {
              _context2.next = 35;
              break;
            }

            return _context2.abrupt("break", 46);

          case 35:
            _ref2 = _iterator2[_i2++];
            _context2.next = 42;
            break;

          case 38:
            _i2 = _iterator2.next();

            if (!_i2.done) {
              _context2.next = 41;
              break;
            }

            return _context2.abrupt("break", 46);

          case 41:
            _ref2 = _i2.value;

          case 42:
            _value = _ref2;
            (0, _merge["default"])(merged, _value);

          case 44:
            _context2.next = 32;
            break;

          case 46:
            _context2.next = 48;
            return merged;

          case 48:
            return _context2.delegateYield((0, _asyncGeneratorDelegate2["default"])((0, _asyncIterator2["default"])((0, _mergeAsyncIterators["default"])(streams)), _awaitAsyncGenerator2["default"]), "t4", 49);

          case 49:
          case "end":
            return _context2.stop();
        }
      }
    }, _callee);
  }));
  return _mergeStreams.apply(this, arguments);
}

module.exports = exports.default;