relay-runtime/lib/util/RelayReplaySubject.js

A core runtime for building GraphQL-driven applications.

'use strict';

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault")["default"];
var _createForOfIteratorHelper2 = _interopRequireDefault(require("@babel/runtime/helpers/createForOfIteratorHelper"));
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var RelayObservable = require('../network/RelayObservable');
var invariant = require('invariant');
var RelayReplaySubject = /*#__PURE__*/function () {
  function RelayReplaySubject() {
    var _this = this;
    (0, _defineProperty2["default"])(this, "_complete", false);
    (0, _defineProperty2["default"])(this, "_events", []);
    (0, _defineProperty2["default"])(this, "_sinks", new Set());
    (0, _defineProperty2["default"])(this, "_subscription", []);
    this._observable = RelayObservable.create(function (sink) {
      _this._sinks.add(sink);
      var events = _this._events;
      for (var i = 0; i < events.length; i++) {
        if (sink.closed) {
          break;
        }
        var event = events[i];
        switch (event.kind) {
          case 'complete':
            sink.complete();
            break;
          case 'error':
            sink.error(event.error);
            break;
          case 'next':
            sink.next(event.data);
            break;
          default:
            event.kind;
            !false ? process.env.NODE_ENV !== "production" ? invariant(false, 'RelayReplaySubject: Unknown event kind `%s`.', event.kind) : invariant(false) : void 0;
        }
      }
      return function () {
        _this._sinks["delete"](sink);
      };
    });
  }
  var _proto = RelayReplaySubject.prototype;
  _proto.complete = function complete() {
    if (this._complete === true) {
      return;
    }
    this._complete = true;
    this._events.push({
      kind: 'complete'
    });
    this._sinks.forEach(function (sink) {
      return sink.complete();
    });
  };
  _proto.error = function error(_error) {
    if (this._complete === true) {
      return;
    }
    this._complete = true;
    this._events.push({
      kind: 'error',
      error: _error
    });
    this._sinks.forEach(function (sink) {
      return sink.error(_error);
    });
  };
  _proto.next = function next(data) {
    if (this._complete === true) {
      return;
    }
    this._events.push({
      kind: 'next',
      data: data
    });
    this._sinks.forEach(function (sink) {
      return sink.next(data);
    });
  };
  _proto.subscribe = function subscribe(observer) {
    var subscription = this._observable.subscribe(observer);
    this._subscription.push(subscription);
    return subscription;
  };
  _proto.unsubscribe = function unsubscribe() {
    var _iterator = (0, _createForOfIteratorHelper2["default"])(this._subscription),
      _step;
    try {
      for (_iterator.s(); !(_step = _iterator.n()).done;) {
        var subscription = _step.value;
        subscription.unsubscribe();
      }
    } catch (err) {
      _iterator.e(err);
    } finally {
      _iterator.f();
    }
    this._subscription = [];
  };
  _proto.getObserverCount = function getObserverCount() {
    return this._sinks.size;
  };
  return RelayReplaySubject;
}();
module.exports = RelayReplaySubject;