40 lines
1.7 KiB
JavaScript
40 lines
1.7 KiB
JavaScript
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import { Observable } from '../Observable';
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import { argsArgArrayOrObject } from '../util/argsArgArrayOrObject';
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import { innerFrom } from './innerFrom';
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import { popResultSelector } from '../util/args';
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import { createOperatorSubscriber } from '../operators/OperatorSubscriber';
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import { mapOneOrManyArgs } from '../util/mapOneOrManyArgs';
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import { createObject } from '../util/createObject';
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export function forkJoin(...args) {
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const resultSelector = popResultSelector(args);
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const { args: sources, keys } = argsArgArrayOrObject(args);
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const result = new Observable((subscriber) => {
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const { length } = sources;
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if (!length) {
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subscriber.complete();
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return;
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}
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const values = new Array(length);
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let remainingCompletions = length;
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let remainingEmissions = length;
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for (let sourceIndex = 0; sourceIndex < length; sourceIndex++) {
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let hasValue = false;
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innerFrom(sources[sourceIndex]).subscribe(createOperatorSubscriber(subscriber, (value) => {
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if (!hasValue) {
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hasValue = true;
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remainingEmissions--;
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}
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values[sourceIndex] = value;
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}, () => remainingCompletions--, undefined, () => {
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if (!remainingCompletions || !hasValue) {
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if (!remainingEmissions) {
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subscriber.next(keys ? createObject(keys, values) : values);
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}
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subscriber.complete();
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}
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}));
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}
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});
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return resultSelector ? result.pipe(mapOneOrManyArgs(resultSelector)) : result;
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}
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//# sourceMappingURL=forkJoin.js.map
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