| import { Observable } from '../Observable'; |
| import { subscribeToResult } from '../util/subscribeToResult'; |
| import { OuterSubscriber } from '../OuterSubscriber'; |
| /** |
| * We need this JSDoc comment for affecting ESDoc. |
| * @extends {Ignored} |
| * @hide true |
| */ |
| export class IfObservable extends Observable { |
| constructor(condition, thenSource, elseSource) { |
| super(); |
| this.condition = condition; |
| this.thenSource = thenSource; |
| this.elseSource = elseSource; |
| } |
| static create(condition, thenSource, elseSource) { |
| return new IfObservable(condition, thenSource, elseSource); |
| } |
| _subscribe(subscriber) { |
| const { condition, thenSource, elseSource } = this; |
| return new IfSubscriber(subscriber, condition, thenSource, elseSource); |
| } |
| } |
| class IfSubscriber extends OuterSubscriber { |
| constructor(destination, condition, thenSource, elseSource) { |
| super(destination); |
| this.condition = condition; |
| this.thenSource = thenSource; |
| this.elseSource = elseSource; |
| this.tryIf(); |
| } |
| tryIf() { |
| const { condition, thenSource, elseSource } = this; |
| let result; |
| try { |
| result = condition(); |
| const source = result ? thenSource : elseSource; |
| if (source) { |
| this.add(subscribeToResult(this, source)); |
| } |
| else { |
| this._complete(); |
| } |
| } |
| catch (err) { |
| this._error(err); |
| } |
| } |
| } |
| //# sourceMappingURL=IfObservable.js.map |