ꦫꦣꦺꦤ꧀ꦄꦤ꧀ꦠꦱꦺꦤ

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 { OuterSubscriber } from '../OuterSubscriber';
import { InnerSubscriber } from '../InnerSubscriber';
import { subscribeToResult } from '../util/subscribeToResult';
import { ObservableInput, OperatorFunction, ObservedValueOf } from '../types';

/* tslint:disable:max-line-length */
export function catchError<T, O extends ObservableInput<any>>(selector: (err: any, caught: Observable<T>) => O): OperatorFunction<T, T | ObservedValueOf<O>>;
/* tslint:enable:max-line-length */

/**
 * Catches errors on the observable to be handled by returning a new observable or throwing an error.
 *
 * ![](catch.png)
 *
 * ## Examples
 * Continues with a different Observable when there's an error
 *
 * ```ts
 * import { of } from 'rxjs';
 * import { map, catchError } from 'rxjs/operators';
 *
 * of(1, 2, 3, 4, 5).pipe(
 *     map(n => {
 *   	   if (n === 4) {
 * 	       throw 'four!';
 *       }
 *	     return n;
 *     }),
 *     catchError(err => of('I', 'II', 'III', 'IV', 'V')),
 *   )
 *   .subscribe(x => console.log(x));
 *   // 1, 2, 3, I, II, III, IV, V
 * ```
 *
 * Retries the caught source Observable again in case of error, similar to retry() operator
 *
 * ```ts
 * import { of } from 'rxjs';
 * import { map, catchError, take } from 'rxjs/operators';
 *
 * of(1, 2, 3, 4, 5).pipe(
 *     map(n => {
 *   	   if (n === 4) {
 *   	     throw 'four!';
 *       }
 * 	     return n;
 *     }),
 *     catchError((err, caught) => caught),
 *     take(30),
 *   )
 *   .subscribe(x => console.log(x));
 *   // 1, 2, 3, 1, 2, 3, ...
 * ```
 *
 * Throws a new error when the source Observable throws an error
 *
 * ```ts
 * import { of } from 'rxjs';
 * import { map, catchError } from 'rxjs/operators';
 *
 * of(1, 2, 3, 4, 5).pipe(
 *     map(n => {
 *       if (n === 4) {
 *         throw 'four!';
 *       }
 *       return n;
 *     }),
 *     catchError(err => {
 *       throw 'error in source. Details: ' + err;
 *     }),
 *   )
 *   .subscribe(
 *     x => console.log(x),
 *     err => console.log(err)
 *   );
 *   // 1, 2, 3, error in source. Details: four!
 * ```
 *
 *  @param {function} selector a function that takes as arguments `err`, which is the error, and `caught`, which
 *  is the source observable, in case you'd like to "retry" that observable by returning it again. Whatever observable
 *  is returned by the `selector` will be used to continue the observable chain.
 * @return {Observable} An observable that originates from either the source or the observable returned by the
 *  catch `selector` function.
 * @name catchError
 */
export function catchError<T, O extends ObservableInput<any>>(
  selector: (err: any, caught: Observable<T>) => O
): OperatorFunction<T, T | ObservedValueOf<O>> {
  return function catchErrorOperatorFunction(source: Observable<T>): Observable<T | ObservedValueOf<O>> {
    const operator = new CatchOperator(selector);
    const caught = source.lift(operator);
    return (operator.caught = caught as Observable<T>);
  };
}

class CatchOperator<T, R> implements Operator<T, T | R> {
  caught: Observable<T>;

constructor(private selector: (err: any, caught: Observable<T>) => ObservableInput<T | R>) {
  }

call(subscriber: Subscriber<R>, source: any): any {
    return source.subscribe(new CatchSubscriber(subscriber, this.selector, this.caught));
  }
}

/**
 * We need this JSDoc comment for affecting ESDoc.
 * @ignore
 * @extends {Ignored}
 */
class CatchSubscriber<T, R> extends OuterSubscriber<T, T | R> {
  constructor(destination: Subscriber<any>,
              private selector: (err: any, caught: Observable<T>) => ObservableInput<T | R>,
              private caught: Observable<T>) {
    super(destination);
  }

// NOTE: overriding `error` instead of `_error` because we don't want
  // to have this flag this subscriber as `isStopped`. We can mimic the
  // behavior of the RetrySubscriber (from the `retry` operator), where
  // we unsubscribe from our source chain, reset our Subscriber flags,
  // then subscribe to the selector result.
  error(err: any) {
    if (!this.isStopped) {
      let result: any;
      try {
        result = this.selector(err, this.caught);
      } catch (err2) {
        super.error(err2);
        return;
      }
      this._unsubscribeAndRecycle();
      const innerSubscriber = new InnerSubscriber(this, undefined, undefined);
      this.add(innerSubscriber);
      subscribeToResult(this, result, undefined, undefined, innerSubscriber);
    }
  }
}

[-] 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]