AlexAegis/loreplotter

import { OnDestroy } from '@angular/core';
import { Subscription } from 'rxjs';

/**
 * Adds a subscription object and a default OnDestroy hook to the child component
 *
 * If ngOnDestroy is is overriden in the child component don't forget to call
 * ```typescript
 * super.ngOnDestroy();
 * ```
 */
export class BaseDirective implements OnDestroy {
    protected subscriptions = new Subscription();

    /**
     * Add the subsription to a directive wide subscription object
     * which will be unsubscribed OnDestroy by default making
     * all the added subscriptions unsubsribe
     *
     * @param subscription to be torn down on destroy
     */
    protected set teardown(subscription: Subscription) {
        this.subscriptions.add(subscription);
    }

    public ngOnDestroy(): void {
        this.subscriptions.unsubscribe();
    }
}