| 1 | import { OuterSubscriber } from '../OuterSubscriber';
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| 2 | import { subscribeToResult } from '../util/subscribeToResult';
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| 3 | export function withLatestFrom(...args) {
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| 4 | return (source) => {
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| 5 | let project;
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| 6 | if (typeof args[args.length - 1] === 'function') {
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| 7 | project = args.pop();
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| 8 | }
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| 9 | const observables = args;
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| 10 | return source.lift(new WithLatestFromOperator(observables, project));
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| 11 | };
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| 12 | }
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| 13 | class WithLatestFromOperator {
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| 14 | constructor(observables, project) {
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| 15 | this.observables = observables;
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| 16 | this.project = project;
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| 17 | }
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| 18 | call(subscriber, source) {
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| 19 | return source.subscribe(new WithLatestFromSubscriber(subscriber, this.observables, this.project));
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| 20 | }
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| 21 | }
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| 22 | class WithLatestFromSubscriber extends OuterSubscriber {
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| 23 | constructor(destination, observables, project) {
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| 24 | super(destination);
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| 25 | this.observables = observables;
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| 26 | this.project = project;
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| 27 | this.toRespond = [];
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| 28 | const len = observables.length;
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| 29 | this.values = new Array(len);
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| 30 | for (let i = 0; i < len; i++) {
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| 31 | this.toRespond.push(i);
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| 32 | }
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| 33 | for (let i = 0; i < len; i++) {
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| 34 | let observable = observables[i];
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| 35 | this.add(subscribeToResult(this, observable, undefined, i));
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| 36 | }
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| 37 | }
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| 38 | notifyNext(_outerValue, innerValue, outerIndex) {
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| 39 | this.values[outerIndex] = innerValue;
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| 40 | const toRespond = this.toRespond;
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| 41 | if (toRespond.length > 0) {
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| 42 | const found = toRespond.indexOf(outerIndex);
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| 43 | if (found !== -1) {
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| 44 | toRespond.splice(found, 1);
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| 45 | }
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| 46 | }
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| 47 | }
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| 48 | notifyComplete() {
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| 49 | }
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| 50 | _next(value) {
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| 51 | if (this.toRespond.length === 0) {
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| 52 | const args = [value, ...this.values];
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| 53 | if (this.project) {
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| 54 | this._tryProject(args);
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| 55 | }
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| 56 | else {
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| 57 | this.destination.next(args);
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| 58 | }
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| 59 | }
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| 60 | }
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| 61 | _tryProject(args) {
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| 62 | let result;
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| 63 | try {
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| 64 | result = this.project.apply(this, args);
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| 65 | }
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| 66 | catch (err) {
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| 67 | this.destination.error(err);
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| 68 | return;
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| 69 | }
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| 70 | this.destination.next(result);
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| 71 | }
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| 72 | }
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| 73 | //# sourceMappingURL=withLatestFrom.js.map |
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