158 lines
3.7 KiB
JavaScript
158 lines
3.7 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*
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* @format
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*/
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// flowlint ambiguous-object-type:error
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'use strict';
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var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
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var _createForOfIteratorHelper2 = _interopRequireDefault(require("@babel/runtime/helpers/createForOfIteratorHelper"));
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var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
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var RelayObservable = require('../network/RelayObservable');
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var invariant = require('invariant');
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/**
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* An implementation of a `ReplaySubject` for Relay Observables.
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*
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* Records events provided and synchronously plays them back to new subscribers,
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* as well as forwarding new asynchronous events.
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*/
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var RelayReplaySubject = /*#__PURE__*/function () {
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function RelayReplaySubject() {
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var _this = this;
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(0, _defineProperty2["default"])(this, "_complete", false);
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(0, _defineProperty2["default"])(this, "_events", []);
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(0, _defineProperty2["default"])(this, "_sinks", new Set());
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(0, _defineProperty2["default"])(this, "_subscription", []);
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this._observable = RelayObservable.create(function (sink) {
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_this._sinks.add(sink);
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var events = _this._events;
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for (var i = 0; i < events.length; i++) {
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if (sink.closed) {
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// Bail if an event made the observer unsubscribe.
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break;
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}
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var event = events[i];
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switch (event.kind) {
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case 'complete':
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sink.complete();
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break;
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case 'error':
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sink.error(event.error);
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break;
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case 'next':
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sink.next(event.data);
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break;
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default:
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event.kind;
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!false ? process.env.NODE_ENV !== "production" ? invariant(false, 'RelayReplaySubject: Unknown event kind `%s`.', event.kind) : invariant(false) : void 0;
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}
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}
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return function () {
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_this._sinks["delete"](sink);
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};
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});
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}
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var _proto = RelayReplaySubject.prototype;
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_proto.complete = function complete() {
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if (this._complete === true) {
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return;
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}
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this._complete = true;
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this._events.push({
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kind: 'complete'
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});
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this._sinks.forEach(function (sink) {
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return sink.complete();
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});
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};
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_proto.error = function error(_error) {
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if (this._complete === true) {
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return;
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}
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this._complete = true;
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this._events.push({
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kind: 'error',
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error: _error
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});
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this._sinks.forEach(function (sink) {
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return sink.error(_error);
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});
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};
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_proto.next = function next(data) {
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if (this._complete === true) {
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return;
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}
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this._events.push({
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kind: 'next',
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data: data
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});
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this._sinks.forEach(function (sink) {
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return sink.next(data);
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});
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};
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_proto.subscribe = function subscribe(observer) {
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var subscription = this._observable.subscribe(observer);
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this._subscription.push(subscription);
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return subscription;
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};
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_proto.unsubscribe = function unsubscribe() {
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var _iterator = (0, _createForOfIteratorHelper2["default"])(this._subscription),
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_step;
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try {
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for (_iterator.s(); !(_step = _iterator.n()).done;) {
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var subscription = _step.value;
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subscription.unsubscribe();
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}
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} catch (err) {
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_iterator.e(err);
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} finally {
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_iterator.f();
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}
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this._subscription = [];
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};
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_proto.getObserverCount = function getObserverCount() {
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return this._sinks.size;
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};
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return RelayReplaySubject;
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}();
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module.exports = RelayReplaySubject; |