57 lines
1.6 KiB
JavaScript
57 lines
1.6 KiB
JavaScript
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import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';
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export function distinct(keySelector, flushes) {
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return (source) => source.lift(new DistinctOperator(keySelector, flushes));
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}
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class DistinctOperator {
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constructor(keySelector, flushes) {
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this.keySelector = keySelector;
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this.flushes = flushes;
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}
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call(subscriber, source) {
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return source.subscribe(new DistinctSubscriber(subscriber, this.keySelector, this.flushes));
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}
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}
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export class DistinctSubscriber extends SimpleOuterSubscriber {
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constructor(destination, keySelector, flushes) {
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super(destination);
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this.keySelector = keySelector;
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this.values = new Set();
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if (flushes) {
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this.add(innerSubscribe(flushes, new SimpleInnerSubscriber(this)));
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}
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}
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notifyNext() {
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this.values.clear();
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}
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notifyError(error) {
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this._error(error);
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}
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_next(value) {
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if (this.keySelector) {
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this._useKeySelector(value);
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}
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else {
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this._finalizeNext(value, value);
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}
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}
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_useKeySelector(value) {
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let key;
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const { destination } = this;
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try {
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key = this.keySelector(value);
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}
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catch (err) {
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destination.error(err);
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return;
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}
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this._finalizeNext(key, value);
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}
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_finalizeNext(key, value) {
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const { values } = this;
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if (!values.has(key)) {
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values.add(key);
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this.destination.next(value);
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}
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}
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}
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//# sourceMappingURL=distinct.js.map
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