@graffy/common/cjs/stream/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 _bind = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/instance/bind"));

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

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

var _getIteratorMethod2 = _interopRequireDefault(require("@babel/runtime-corejs3/core-js/get-iterator-method"));

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

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

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

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

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 _graph = require("../graph");

function _createForOfIteratorHelperLoose(o, allowArrayLike) { var _context4; var it; if (typeof _symbol.default === "undefined" || (0, _getIteratorMethod2.default)(o) == null) { if ((0, _isArray.default)(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; return function () { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } it = (0, _getIterator2.default)(o); return (0, _bind.default)(_context4 = it.next).call(_context4, it); }

function _unsupportedIterableToArray(o, minLen) { var _context3; if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = (0, _slice.default)(_context3 = Object.prototype.toString.call(o)).call(_context3, 8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return (0, _from.default)(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

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,
        _step,
        value,
        merged,
        _iterator2,
        _step2,
        _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;
            firstValues = (0, _context2.t0)(_context2.t1).call(_context, function (iter) {
              return iter.value;
            });

            if (!(0, _some.default)(firstValues).call(firstValues, function (value) {
              return typeof value === 'undefined';
            })) {
              _context2.next = 19;
              break;
            }

            _context2.next = 9;
            return undefined;

          case 9:
            _iterator = _createForOfIteratorHelperLoose(firstValues);

          case 10:
            if ((_step = _iterator()).done) {
              _context2.next = 17;
              break;
            }

            value = _step.value;

            if (!(typeof value !== 'undefined')) {
              _context2.next = 15;
              break;
            }

            _context2.next = 15;
            return value;

          case 15:
            _context2.next = 10;
            break;

          case 17:
            _context2.next = 23;
            break;

          case 19:
            merged = [];

            for (_iterator2 = _createForOfIteratorHelperLoose(firstValues); !(_step2 = _iterator2()).done;) {
              _value = _step2.value;
              (0, _graph.merge)(merged, _value);
            }

            _context2.next = 23;
            return merged;

          case 23:
            return _context2.delegateYield((0, _asyncGeneratorDelegate2.default)((0, _asyncIterator2.default)((0, _mergeAsyncIterators.default)(streams)), _awaitAsyncGenerator2.default), "t2", 24);

          case 24:
          case "end":
            return _context2.stop();
        }
      }
    }, _callee);
  }));
  return _mergeStreams.apply(this, arguments);
}

module.exports = exports.default;