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PATH: usr / local / lib / node_modules / ghost-cli / node_modules / rxjs / src / internal / operators

import { Observable } from '../Observable';
import { ReplaySubject } from '../ReplaySubject';
import { Subscription } from '../Subscription';
import { MonoTypeOperatorFunction, SchedulerLike } from '../types';
import { Subscriber } from '../Subscriber';

export interface ShareReplayConfig {
  bufferSize?: number;
  windowTime?: number;
  refCount: boolean;
  scheduler?: SchedulerLike;
}

/**
 * Share source and replay specified number of emissions on subscription.
 *
 * This operator is a specialization of `replay` that connects to a source observable
 * and multicasts through a `ReplaySubject` constructed with the specified arguments.
 * A successfully completed source will stay cached in the `shareReplayed observable` forever,
 * but an errored source can be retried.
 *
 * ## Why use shareReplay?
 * You generally want to use `shareReplay` when you have side-effects or taxing computations
 * that you do not wish to be executed amongst multiple subscribers.
 * It may also be valuable in situations where you know you will have late subscribers to
 * a stream that need access to previously emitted values.
 * This ability to replay values on subscription is what differentiates {@link share} and `shareReplay`.
 *
 * ![](shareReplay.png)
 *
 * ## Example
 * ```ts
 * import { interval } from 'rxjs';
 * import { shareReplay, take } from 'rxjs/operators';
 *
 * const obs$ = interval(1000);
 * const shared$ = obs$.pipe(
 *   take(4),
 *   shareReplay(3)
 * );
 * shared$.subscribe(x => console.log('source A: ', x));
 * shared$.subscribe(y => console.log('source B: ', y));
 *
 * ```
 *
 * @see {@link publish}
 * @see {@link share}
 * @see {@link publishReplay}
 *
 * @param {Number} [bufferSize=Number.POSITIVE_INFINITY] Maximum element count of the replay buffer.
 * @param {Number} [windowTime=Number.POSITIVE_INFINITY] Maximum time length of the replay buffer in milliseconds.
 * @param {Scheduler} [scheduler] Scheduler where connected observers within the selector function
 * will be invoked on.
 * @return {Observable} An observable sequence that contains the elements of a sequence produced
 * by multicasting the source sequence within a selector function.
 * @method shareReplay
 * @owner Observable
 */
export function shareReplay<T>(config: ShareReplayConfig): MonoTypeOperatorFunction<T>;
export function shareReplay<T>(bufferSize?: number, windowTime?: number, scheduler?: SchedulerLike): MonoTypeOperatorFunction<T>;
export function shareReplay<T>(
  configOrBufferSize?: ShareReplayConfig | number,
  windowTime?: number,
  scheduler?: SchedulerLike
): MonoTypeOperatorFunction<T> {
  let config: ShareReplayConfig;
  if (configOrBufferSize && typeof configOrBufferSize === 'object') {
    config = configOrBufferSize as ShareReplayConfig;
  } else {
    config = {
      bufferSize: configOrBufferSize as number | undefined,
      windowTime,
      refCount: false,
      scheduler
    };
  }
  return (source: Observable<T>) => source.lift(shareReplayOperator(config));
}

function shareReplayOperator<T>({
  bufferSize = Number.POSITIVE_INFINITY,
  windowTime = Number.POSITIVE_INFINITY,
  refCount: useRefCount,
  scheduler
}: ShareReplayConfig) {
  let subject: ReplaySubject<T> | undefined;
  let refCount = 0;
  let subscription: Subscription | undefined;
  let hasError = false;
  let isComplete = false;

return function shareReplayOperation(this: Subscriber<T>, source: Observable<T>) {
    refCount++;
    if (!subject || hasError) {
      hasError = false;
      subject = new ReplaySubject<T>(bufferSize, windowTime, scheduler);
      subscription = source.subscribe({
        next(value) { subject.next(value); },
        error(err) {
          hasError = true;
          subject.error(err);
        },
        complete() {
          isComplete = true;
          subject.complete();
        },
      });
    }

const innerSub = subject.subscribe(this);
    this.add(() => {
      refCount--;
      innerSub.unsubscribe();
      if (subscription && !isComplete && useRefCount && refCount === 0) {
        subscription.unsubscribe();
        subscription = undefined;
        subject = undefined;
      }
    });
  };
}

[-] toArray.ts [edit]
[-] window.ts [edit]
[-] retry.ts [edit]
[-] mergeAll.ts [edit]
[-] windowWhen.ts [edit]
[-] every.ts [edit]
[-] timeout.ts [edit]
[-] debounceTime.ts [edit]
[-] index.ts [edit]
[-] takeWhile.ts [edit]
[-] audit.ts [edit]
[-] reduce.ts [edit]
[-] mapTo.ts [edit]
[-] count.ts [edit]
[-] debounce.ts [edit]
[-] throwIfEmpty.ts [edit]
[-] auditTime.ts [edit]
[-] scan.ts [edit]
[-] switchAll.ts [edit]
[-] map.ts [edit]
[-] bufferCount.ts [edit]
[-] mergeScan.ts [edit]
[-] publish.ts [edit]
[-] min.ts [edit]
[+] ..
[-] publishReplay.ts [edit]
[-] bufferTime.ts [edit]
[-] share.ts [edit]
[-] repeat.ts [edit]
[-] distinct.ts [edit]
[-] concatMapTo.ts [edit]
[-] buffer.ts [edit]
[-] concatMap.ts [edit]
[-] max.ts [edit]
[-] partition.ts [edit]
[-] observeOn.ts [edit]
[-] bufferWhen.ts [edit]
[-] dematerialize.ts [edit]
[-] throttle.ts [edit]
[-] groupBy.ts [edit]
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[-] last.ts [edit]
[-] combineLatest.ts [edit]
[-] publishLast.ts [edit]
[-] pluck.ts [edit]
[-] pairwise.ts [edit]
[-] distinctUntilChanged.ts [edit]
[-] timeInterval.ts [edit]
[-] shareReplay.ts [edit]
[-] skipUntil.ts [edit]
[-] findIndex.ts [edit]
[-] windowToggle.ts [edit]
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[-] timeoutWith.ts [edit]
[-] concat.ts [edit]
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[-] timestamp.ts [edit]
[-] onErrorResumeNext.ts [edit]
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[-] throttleTime.ts [edit]
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[-] multicast.ts [edit]
[-] merge.ts [edit]
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[-] sampleTime.ts [edit]
[-] tap.ts [edit]
[-] take.ts [edit]
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[-] publishBehavior.ts [edit]
[-] sequenceEqual.ts [edit]
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[-] race.ts [edit]
[-] finalize.ts [edit]
[-] combineAll.ts [edit]
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