| 1 | (function (global, factory) {
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| 2 | typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('tslib'), require('apollo-link')) :
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| 3 | typeof define === 'function' && define.amd ? define(['exports', 'tslib', 'apollo-link'], factory) :
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| 4 | (global = global || self, factory((global.apolloLink = global.apolloLink || {}, global.apolloLink.dedup = {}), global.tslib, global.apolloLink.core));
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| 5 | }(this, (function (exports, tslib_1, apolloLink) { 'use strict';
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| 6 |
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| 7 | var DedupLink = (function (_super) {
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| 8 | tslib_1.__extends(DedupLink, _super);
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| 9 | function DedupLink() {
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| 10 | var _this = _super !== null && _super.apply(this, arguments) || this;
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| 11 | _this.inFlightRequestObservables = new Map();
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| 12 | _this.subscribers = new Map();
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| 13 | return _this;
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| 14 | }
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| 15 | DedupLink.prototype.request = function (operation, forward) {
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| 16 | var _this = this;
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| 17 | if (operation.getContext().forceFetch) {
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| 18 | return forward(operation);
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| 19 | }
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| 20 | var key = operation.toKey();
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| 21 | if (!this.inFlightRequestObservables.get(key)) {
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| 22 | var singleObserver_1 = forward(operation);
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| 23 | var subscription_1;
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| 24 | var sharedObserver = new apolloLink.Observable(function (observer) {
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| 25 | if (!_this.subscribers.has(key))
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| 26 | _this.subscribers.set(key, new Set());
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| 27 | _this.subscribers.get(key).add(observer);
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| 28 | if (!subscription_1) {
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| 29 | subscription_1 = singleObserver_1.subscribe({
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| 30 | next: function (result) {
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| 31 | var subscribers = _this.subscribers.get(key);
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| 32 | _this.subscribers.delete(key);
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| 33 | _this.inFlightRequestObservables.delete(key);
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| 34 | if (subscribers) {
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| 35 | subscribers.forEach(function (obs) { return obs.next(result); });
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| 36 | subscribers.forEach(function (obs) { return obs.complete(); });
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| 37 | }
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| 38 | },
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| 39 | error: function (error) {
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| 40 | var subscribers = _this.subscribers.get(key);
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| 41 | _this.subscribers.delete(key);
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| 42 | _this.inFlightRequestObservables.delete(key);
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| 43 | if (subscribers) {
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| 44 | subscribers.forEach(function (obs) { return obs.error(error); });
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| 45 | }
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| 46 | },
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| 47 | });
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| 48 | }
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| 49 | return function () {
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| 50 | if (_this.subscribers.has(key)) {
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| 51 | _this.subscribers.get(key).delete(observer);
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| 52 | if (_this.subscribers.get(key).size === 0) {
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| 53 | _this.inFlightRequestObservables.delete(key);
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| 54 | if (subscription_1)
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| 55 | subscription_1.unsubscribe();
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| 56 | }
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| 57 | }
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| 58 | };
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| 59 | });
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| 60 | this.inFlightRequestObservables.set(key, sharedObserver);
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| 61 | }
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| 62 | return this.inFlightRequestObservables.get(key);
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| 63 | };
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| 64 | return DedupLink;
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| 65 | }(apolloLink.ApolloLink));
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| 66 |
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| 67 | exports.DedupLink = DedupLink;
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| 68 |
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| 69 | Object.defineProperty(exports, '__esModule', { value: true });
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| 70 |
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| 71 | })));
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| 72 |
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