| 1 | "use strict";
|
| 2 | Object.defineProperty(exports, "__esModule", { value: true });
|
| 3 | var tslib_1 = require("tslib");
|
| 4 | var apollo_link_1 = require("apollo-link");
|
| 5 | var DedupLink = (function (_super) {
|
| 6 | tslib_1.__extends(DedupLink, _super);
|
| 7 | function DedupLink() {
|
| 8 | var _this = _super !== null && _super.apply(this, arguments) || this;
|
| 9 | _this.inFlightRequestObservables = new Map();
|
| 10 | _this.subscribers = new Map();
|
| 11 | return _this;
|
| 12 | }
|
| 13 | DedupLink.prototype.request = function (operation, forward) {
|
| 14 | var _this = this;
|
| 15 | if (operation.getContext().forceFetch) {
|
| 16 | return forward(operation);
|
| 17 | }
|
| 18 | var key = operation.toKey();
|
| 19 | if (!this.inFlightRequestObservables.get(key)) {
|
| 20 | var singleObserver_1 = forward(operation);
|
| 21 | var subscription_1;
|
| 22 | var sharedObserver = new apollo_link_1.Observable(function (observer) {
|
| 23 | if (!_this.subscribers.has(key))
|
| 24 | _this.subscribers.set(key, new Set());
|
| 25 | _this.subscribers.get(key).add(observer);
|
| 26 | if (!subscription_1) {
|
| 27 | subscription_1 = singleObserver_1.subscribe({
|
| 28 | next: function (result) {
|
| 29 | var subscribers = _this.subscribers.get(key);
|
| 30 | _this.subscribers.delete(key);
|
| 31 | _this.inFlightRequestObservables.delete(key);
|
| 32 | if (subscribers) {
|
| 33 | subscribers.forEach(function (obs) { return obs.next(result); });
|
| 34 | subscribers.forEach(function (obs) { return obs.complete(); });
|
| 35 | }
|
| 36 | },
|
| 37 | error: function (error) {
|
| 38 | var subscribers = _this.subscribers.get(key);
|
| 39 | _this.subscribers.delete(key);
|
| 40 | _this.inFlightRequestObservables.delete(key);
|
| 41 | if (subscribers) {
|
| 42 | subscribers.forEach(function (obs) { return obs.error(error); });
|
| 43 | }
|
| 44 | },
|
| 45 | });
|
| 46 | }
|
| 47 | return function () {
|
| 48 | if (_this.subscribers.has(key)) {
|
| 49 | _this.subscribers.get(key).delete(observer);
|
| 50 | if (_this.subscribers.get(key).size === 0) {
|
| 51 | _this.inFlightRequestObservables.delete(key);
|
| 52 | if (subscription_1)
|
| 53 | subscription_1.unsubscribe();
|
| 54 | }
|
| 55 | }
|
| 56 | };
|
| 57 | });
|
| 58 | this.inFlightRequestObservables.set(key, sharedObserver);
|
| 59 | }
|
| 60 | return this.inFlightRequestObservables.get(key);
|
| 61 | };
|
| 62 | return DedupLink;
|
| 63 | }(apollo_link_1.ApolloLink));
|
| 64 | exports.DedupLink = DedupLink;
|
| 65 | |
| \ | No newline at end of file |