rxjs
Version:
Reactive Extensions for modern JavaScript
46 lines (45 loc) • 1.57 kB
JavaScript
/** PURE_IMPORTS_START _ReplaySubject PURE_IMPORTS_END */
import { ReplaySubject } from '../ReplaySubject';
export function shareReplay(bufferSize, windowTime, scheduler) {
if (bufferSize === void 0) {
bufferSize = Number.POSITIVE_INFINITY;
}
if (windowTime === void 0) {
windowTime = Number.MAX_VALUE;
}
return function (source) { return source.lift(shareReplayOperator(bufferSize, windowTime, scheduler)); };
}
function shareReplayOperator(bufferSize, windowTime, scheduler) {
var subject;
var refCount = 0;
var subscription;
var hasError = false;
var isComplete = false;
return function shareReplayOperation(source) {
refCount++;
if (!subject || hasError) {
hasError = false;
subject = new ReplaySubject(bufferSize, windowTime, scheduler);
subscription = source.subscribe({
next: function (value) { subject.next(value); },
error: function (err) {
hasError = true;
subject.error(err);
},
complete: function () {
isComplete = true;
subject.complete();
},
});
}
var innerSub = subject.subscribe(this);
return function () {
refCount--;
innerSub.unsubscribe();
if (subscription && refCount === 0 && isComplete) {
subscription.unsubscribe();
}
};
};
}
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