58 lines
No EOL
1.7 KiB
JavaScript
58 lines
No EOL
1.7 KiB
JavaScript
import { OuterSubscriber } from '../OuterSubscriber';
|
|
import { subscribeToResult } from '../util/subscribeToResult';
|
|
export function distinct(keySelector, flushes) {
|
|
return (source) => source.lift(new DistinctOperator(keySelector, flushes));
|
|
}
|
|
class DistinctOperator {
|
|
constructor(keySelector, flushes) {
|
|
this.keySelector = keySelector;
|
|
this.flushes = flushes;
|
|
}
|
|
call(subscriber, source) {
|
|
return source.subscribe(new DistinctSubscriber(subscriber, this.keySelector, this.flushes));
|
|
}
|
|
}
|
|
export class DistinctSubscriber extends OuterSubscriber {
|
|
constructor(destination, keySelector, flushes) {
|
|
super(destination);
|
|
this.keySelector = keySelector;
|
|
this.values = new Set();
|
|
if (flushes) {
|
|
this.add(subscribeToResult(this, flushes));
|
|
}
|
|
}
|
|
notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) {
|
|
this.values.clear();
|
|
}
|
|
notifyError(error, innerSub) {
|
|
this._error(error);
|
|
}
|
|
_next(value) {
|
|
if (this.keySelector) {
|
|
this._useKeySelector(value);
|
|
}
|
|
else {
|
|
this._finalizeNext(value, value);
|
|
}
|
|
}
|
|
_useKeySelector(value) {
|
|
let key;
|
|
const { destination } = this;
|
|
try {
|
|
key = this.keySelector(value);
|
|
}
|
|
catch (err) {
|
|
destination.error(err);
|
|
return;
|
|
}
|
|
this._finalizeNext(key, value);
|
|
}
|
|
_finalizeNext(key, value) {
|
|
const { values } = this;
|
|
if (!values.has(key)) {
|
|
values.add(key);
|
|
this.destination.next(value);
|
|
}
|
|
}
|
|
}
|
|
//# sourceMappingURL=distinct.js.map
|