blips/lib/utils/toObservable.js

State management for the GraphQL heads

'use strict';

exports.__esModule = true;
exports.toObservable = toObservable;

var _zenObservable = require('zen-observable');

var _zenObservable2 = _interopRequireDefault(_zenObservable);

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

function _asyncIterator(iterable) { if (typeof Symbol === "function") { if (Symbol.asyncIterator) { var method = iterable[Symbol.asyncIterator]; if (method != null) return method.call(iterable); } if (Symbol.iterator) { return iterable[Symbol.iterator](); } } throw new TypeError("Object is not async iterable"); }

function _asyncToGenerator(fn) { return function () { var gen = fn.apply(this, arguments); return new Promise(function (resolve, reject) { function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { return Promise.resolve(value).then(function (value) { step("next", value); }, function (err) { step("throw", err); }); } } return step("next"); }); }; }

function toObservable(iterator) {
  var _this = this;

  return new _zenObservable2.default(function (observer) {
    ;_asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee() {
      var _iteratorNormalCompletion, _didIteratorError, _iteratorError, _iterator, _step, _value, tick;

      return regeneratorRuntime.wrap(function _callee$(_context) {
        while (1) {
          switch (_context.prev = _context.next) {
            case 0:
              _context.prev = 0;
              _iteratorNormalCompletion = true;
              _didIteratorError = false;
              _iteratorError = undefined;
              _context.prev = 4;
              _iterator = _asyncIterator(iterator);

            case 6:
              _context.next = 8;
              return _iterator.next();

            case 8:
              _step = _context.sent;
              _iteratorNormalCompletion = _step.done;
              _context.next = 12;
              return _step.value;

            case 12:
              _value = _context.sent;

              if (_iteratorNormalCompletion) {
                _context.next = 19;
                break;
              }

              tick = _value;

              observer.next(tick);

            case 16:
              _iteratorNormalCompletion = true;
              _context.next = 6;
              break;

            case 19:
              _context.next = 25;
              break;

            case 21:
              _context.prev = 21;
              _context.t0 = _context['catch'](4);
              _didIteratorError = true;
              _iteratorError = _context.t0;

            case 25:
              _context.prev = 25;
              _context.prev = 26;

              if (!(!_iteratorNormalCompletion && _iterator.return)) {
                _context.next = 30;
                break;
              }

              _context.next = 30;
              return _iterator.return();

            case 30:
              _context.prev = 30;

              if (!_didIteratorError) {
                _context.next = 33;
                break;
              }

              throw _iteratorError;

            case 33:
              return _context.finish(30);

            case 34:
              return _context.finish(25);

            case 35:
              _context.next = 41;
              break;

            case 37:
              _context.prev = 37;
              _context.t1 = _context['catch'](0);

              iterator.return();
              observer.error(_context.t1);

            case 41:
            case 'end':
              return _context.stop();
          }
        }
      }, _callee, _this, [[0, 37], [4, 21, 25, 35], [26,, 30, 34]]);
    }))();
    return function () {
      observer.complete();
      iterator.return();
    };
  });
}