Created
October 18, 2019 14:59
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| type Constructor<T = {}> = new (...args: any[]) => T; | |
| function SubscriptionTrackerMixin<TBase extends Constructor>(Base: TBase) { | |
| return class extends Base implements OnDestroy { | |
| private subscriptions: Subscription[] = []; | |
| public subscribe<T>( | |
| observable: Observable<T>, | |
| observerOrNext?: PartialObserver<T> | ((value: T) => void), | |
| error?: (error: any) => void, | |
| complete?: () => void): Subscription { | |
| const subscription = observable.subscribe( | |
| toSubscriber(observerOrNext, error, complete) | |
| ); | |
| this.subscriptions.push(subscription); | |
| return subscription; | |
| } | |
| public unsubscribe(subscription: Subscription) { | |
| const indexOfSubscription = this.subscriptions.indexOf(subscription); | |
| if (indexOfSubscription == -1) { | |
| throw new Error("Unsubscribing to untracked subscription"); | |
| } | |
| subscription.unsubscribe(); | |
| this.subscriptions.splice(indexOfSubscription, 1); | |
| return subscription; | |
| } | |
| unsubscribeAll() { | |
| this.subscriptions.forEach((subscription) => subscription.unsubscribe()); | |
| this.subscriptions = []; | |
| } | |
| ngOnDestroy() { | |
| this.unsubscribeAll(); | |
| } | |
| }; | |
| } |
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