Code coverage report for src/operator/repeat.ts

Statements: 100% (35 / 35)      Branches: 91.67% (11 / 12)      Functions: 100% (7 / 7)      Lines: 100% (31 / 31)      Ignored: none     

All files » src/operator/ » repeat.ts
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import {Operator} from '../Operator';
import {Subscriber} from '../Subscriber';
import {Observable} from '../Observable';
import {EmptyObservable} from '../observable/EmptyObservable';
 
/**
 * Returns an Observable that repeats the stream of items emitted by the source Observable at most count times,
 * on a particular Scheduler.
 *
 * <img src="./img/repeat.png" width="100%">
 *
 * @param {Scheduler} [scheduler] the Scheduler to emit the items on.
 * @param {number} [count] the number of times the source Observable items are repeated, a count of 0 will yield
 * an empty Observable.
 * @returns {Observable} an Observable that repeats the stream of items emitted by the source Observable at most
 * count times.
 */
export function repeat<T>(count: number = -1): Observable<T> {
  if (count === 0) {
    return new EmptyObservable<T>();
  } else if (count < 0) {
    return this.lift(new RepeatOperator(-1, this));
  } else {
    return this.lift(new RepeatOperator(count - 1, this));
  }
}
 
class RepeatOperator<T> implements Operator<T, T> {
  constructor(private count: number,
              private source: Observable<T>) {
  }
  call(subscriber: Subscriber<T>): Subscriber<T> {
    return new RepeatSubscriber(subscriber, this.count, this.source);
  }
}
 
class RepeatSubscriber<T> extends Subscriber<T> {
  constructor(destination: Subscriber<any>,
              private count: number,
              private source: Observable<T>) {
    super(destination);
  }
  complete() {
    Eif (!this.isStopped) {
      const { source, count } = this;
      if (count === 0) {
        return super.complete();
      } else if (count > -1) {
        this.count = count - 1;
      }
      this.unsubscribe();
      this.isStopped = false;
      this.isUnsubscribed = false;
      source.subscribe(this);
    }
  }
}