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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | 195x 195x 195x 195x 195x 195x 301x 48x 253x 48x 205x 195x 42x 42x 7x 5x 5x | import { Injectable } from '@angular/core';
import { Store, select } from '@ngrx/store';
import { BehaviorSubject, Observable } from 'rxjs';
import { distinctUntilChanged, map } from 'rxjs/operators';
import type { Environment } from 'src/environments/environment.model';
import { getFeatures } from 'ish-core/store/core/configuration';
export type FeatureToggleType = Environment['features'][number];
export function checkFeature(
features: FeatureToggleType[] = [],
feature: 'always' | 'never' | FeatureToggleType
): boolean {
if (feature === 'always') {
return true;
} else if (feature === 'never') {
return false;
} else {
return features.includes(feature);
}
}
@Injectable({ providedIn: 'root' })
export class FeatureToggleService {
private featureToggles$ = new BehaviorSubject<FeatureToggleType[]>(undefined);
constructor(store: Store) {
store.pipe(select(getFeatures)).subscribe(this.featureToggles$);
}
/**
* Synchronously check if {@param feature} is active.
*
* This method should only be used for browser code and only for
* logic that is not included in the initialization process.
*/
enabled(feature: 'always' | 'never' | FeatureToggleType): boolean {
// eslint-disable-next-line rxjs/no-subject-value
return checkFeature(this.featureToggles$.value, feature);
}
/**
* Asynchronously check if {@param feature} is active.
*/
enabled$(feature: 'always' | 'never' | FeatureToggleType): Observable<boolean> {
return this.featureToggles$.pipe(
map(featureToggles => checkFeature(featureToggles, feature)),
distinctUntilChanged()
);
}
}
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