79 lines
2.8 KiB
JavaScript
79 lines
2.8 KiB
JavaScript
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import { innerFrom } from '../observable/innerFrom';
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import { Subject } from '../Subject';
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import { SafeSubscriber } from '../Subscriber';
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import { operate } from '../util/lift';
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export function share(options = {}) {
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const { connector = () => new Subject(), resetOnError = true, resetOnComplete = true, resetOnRefCountZero = true } = options;
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return (wrapperSource) => {
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let connection;
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let resetConnection;
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let subject;
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let refCount = 0;
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let hasCompleted = false;
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let hasErrored = false;
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const cancelReset = () => {
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resetConnection === null || resetConnection === void 0 ? void 0 : resetConnection.unsubscribe();
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resetConnection = undefined;
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};
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const reset = () => {
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cancelReset();
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connection = subject = undefined;
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hasCompleted = hasErrored = false;
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};
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const resetAndUnsubscribe = () => {
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const conn = connection;
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reset();
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conn === null || conn === void 0 ? void 0 : conn.unsubscribe();
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};
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return operate((source, subscriber) => {
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refCount++;
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if (!hasErrored && !hasCompleted) {
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cancelReset();
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}
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const dest = (subject = subject !== null && subject !== void 0 ? subject : connector());
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subscriber.add(() => {
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refCount--;
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if (refCount === 0 && !hasErrored && !hasCompleted) {
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resetConnection = handleReset(resetAndUnsubscribe, resetOnRefCountZero);
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}
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});
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dest.subscribe(subscriber);
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if (!connection &&
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refCount > 0) {
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connection = new SafeSubscriber({
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next: (value) => dest.next(value),
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error: (err) => {
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hasErrored = true;
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cancelReset();
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resetConnection = handleReset(reset, resetOnError, err);
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dest.error(err);
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},
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complete: () => {
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hasCompleted = true;
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cancelReset();
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resetConnection = handleReset(reset, resetOnComplete);
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dest.complete();
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},
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});
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innerFrom(source).subscribe(connection);
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}
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})(wrapperSource);
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};
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}
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function handleReset(reset, on, ...args) {
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if (on === true) {
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reset();
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return;
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}
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if (on === false) {
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return;
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}
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const onSubscriber = new SafeSubscriber({
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next: () => {
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onSubscriber.unsubscribe();
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reset();
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},
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});
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return on(...args).subscribe(onSubscriber);
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}
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//# sourceMappingURL=share.js.map
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