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

import { Operator } from '../Operator';
import { Subscriber } from '../Subscriber';
import { Observable } from '../Observable';
import { MonoTypeOperatorFunction, PartialObserver, TeardownLogic } from '../types';
import { noop } from '../util/noop';
import { isFunction } from '../util/isFunction';

/* tslint:disable:max-line-length */
/** @deprecated Use an observer instead of a complete callback */
export function tap<T>(next: null | undefined, error: null | undefined, complete: () => void): MonoTypeOperatorFunction<T>;
/** @deprecated Use an observer instead of an error callback */
export function tap<T>(next: null | undefined, error: (error: any) => void, complete?: () => void): MonoTypeOperatorFunction<T>;
/** @deprecated Use an observer instead of a complete callback */
export function tap<T>(next: (value: T) => void, error: null | undefined, complete: () => void): MonoTypeOperatorFunction<T>;
export function tap<T>(next?: (x: T) => void, error?: (e: any) => void, complete?: () => void): MonoTypeOperatorFunction<T>;
export function tap<T>(observer: PartialObserver<T>): MonoTypeOperatorFunction<T>;
/* tslint:enable:max-line-length */

/**
 * Perform a side effect for every emission on the source Observable, but return
 * an Observable that is identical to the source.
 *
 * <span class="informal">Intercepts each emission on the source and runs a
 * function, but returns an output which is identical to the source as long as errors don't occur.</span>
 *
 * ![](do.png)
 *
 * Returns a mirrored Observable of the source Observable, but modified so that
 * the provided Observer is called to perform a side effect for every value,
 * error, and completion emitted by the source. Any errors that are thrown in
 * the aforementioned Observer or handlers are safely sent down the error path
 * of the output Observable.
 *
 * This operator is useful for debugging your Observables for the correct values
 * or performing other side effects.
 *
 * Note: this is different to a `subscribe` on the Observable. If the Observable
 * returned by `tap` is not subscribed, the side effects specified by the
 * Observer will never happen. `tap` therefore simply spies on existing
 * execution, it does not trigger an execution to happen like `subscribe` does.
 *
 * ## Example
 * Map every click to the clientX position of that click, while also logging the click event
 * ```ts
 * import { fromEvent } from 'rxjs';
 * import { tap, map } from 'rxjs/operators';
 *
 * const clicks = fromEvent(document, 'click');
 * const positions = clicks.pipe(
 *   tap(ev => console.log(ev)),
 *   map(ev => ev.clientX),
 * );
 * positions.subscribe(x => console.log(x));
 * ```
 *
 * @see {@link map}
 * @see {@link Observable#subscribe}
 *
 * @param {Observer|function} [nextOrObserver] A normal Observer object or a
 * callback for `next`.
 * @param {function} [error] Callback for errors in the source.
 * @param {function} [complete] Callback for the completion of the source.
 * @return {Observable} An Observable identical to the source, but runs the
 * specified Observer or callback(s) for each item.
 * @name tap
 */
export function tap<T>(nextOrObserver?: PartialObserver<T> | ((x: T) => void),
                       error?: (e: any) => void,
                       complete?: () => void): MonoTypeOperatorFunction<T> {
  return function tapOperatorFunction(source: Observable<T>): Observable<T> {
    return source.lift(new DoOperator(nextOrObserver, error, complete));
  };
}

class DoOperator<T> implements Operator<T, T> {
  constructor(private nextOrObserver?: PartialObserver<T> | ((x: T) => void),
              private error?: (e: any) => void,
              private complete?: () => void) {
  }
  call(subscriber: Subscriber<T>, source: any): TeardownLogic {
    return source.subscribe(new TapSubscriber(subscriber, this.nextOrObserver, this.error, this.complete));
  }
}

/**
 * We need this JSDoc comment for affecting ESDoc.
 * @ignore
 * @extends {Ignored}
 */

class TapSubscriber<T> extends Subscriber<T> {
  private _context: any;

private _tapNext: ((value: T) => void) = noop;

private _tapError: ((err: any) => void) = noop;

private _tapComplete: (() => void) = noop;

constructor(destination: Subscriber<T>,
              observerOrNext?: PartialObserver<T> | ((value: T) => void),
              error?: (e?: any) => void,
              complete?: () => void) {
      super(destination);
      this._tapError = error || noop;
      this._tapComplete = complete || noop;
      if (isFunction(observerOrNext)) {
        this._context = this;
        this._tapNext = observerOrNext;
      } else if (observerOrNext) {
        this._context = observerOrNext;
        this._tapNext = observerOrNext.next || noop;
        this._tapError = observerOrNext.error || noop;
        this._tapComplete = observerOrNext.complete || noop;
      }
    }

_next(value: T) {
    try {
      this._tapNext.call(this._context, value);
    } catch (err) {
      this.destination.error(err);
      return;
    }
    this.destination.next(value);
  }

_error(err: any) {
    try {
      this._tapError.call(this._context, err);
    } catch (err) {
      this.destination.error(err);
      return;
    }
    this.destination.error(err);
  }

_complete() {
    try {
      this._tapComplete.call(this._context, );
    } catch (err) {
      this.destination.error(err);
      return;
    }
    return this.destination.complete();
  }
}

[-] 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]
[-] withLatestFrom.ts [edit]
[-] exhaust.ts [edit]
[-] exhaustMap.ts [edit]
[-] retryWhen.ts [edit]
[-] zipAll.ts [edit]
[-] find.ts [edit]
[-] mergeMap.ts [edit]
[-] single.ts [edit]
[-] 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]
[-] startWith.ts [edit]
[-] timeoutWith.ts [edit]
[-] concat.ts [edit]
[-] materialize.ts [edit]
[-] timestamp.ts [edit]
[-] onErrorResumeNext.ts [edit]
[-] subscribeOn.ts [edit]
[-] takeUntil.ts [edit]
[-] skipLast.ts [edit]
[-] throttleTime.ts [edit]
[-] mergeMapTo.ts [edit]
[-] multicast.ts [edit]
[-] merge.ts [edit]
[-] takeLast.ts [edit]
[-] delayWhen.ts [edit]
[-] sampleTime.ts [edit]
[-] tap.ts [edit]
[-] take.ts [edit]
[-] sample.ts [edit]
[-] filter.ts [edit]
[-] skip.ts [edit]
[-] expand.ts [edit]
[-] publishBehavior.ts [edit]
[-] sequenceEqual.ts [edit]
[-] ignoreElements.ts [edit]
[-] catchError.ts [edit]
[-] endWith.ts [edit]
[-] refCount.ts [edit]
[-] windowCount.ts [edit]
[-] defaultIfEmpty.ts [edit]
[-] windowTime.ts [edit]
[-] switchMapTo.ts [edit]
[-] switchMap.ts [edit]
[-] delay.ts [edit]
[-] bufferToggle.ts [edit]
[-] repeatWhen.ts [edit]
[-] concatAll.ts [edit]
[-] first.ts [edit]
[-] zip.ts [edit]
[-] elementAt.ts [edit]
[-] skipWhile.ts [edit]
[-] race.ts [edit]
[-] finalize.ts [edit]
[-] combineAll.ts [edit]
[-] distinctUntilKeyChanged.ts [edit]
[-] isEmpty.ts [edit]