src/app/factories/truncator/truncator.service.factory.ts
// SPDX-License-Identifier: Apache-2.0
// Copyright (c) 2018 Georgi Marinov
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
import { Injectable, InjectionToken } from '@angular/core';
import { TruncatorService } from '../../services/truncator/truncator.service';
import { TruncatorKind } from '../../enums/truncator-kind.enum';
import { PersistenceService } from '../../services/persistence/persistence.service';
/**
* A truncator service.
*/
@Injectable({
providedIn: 'root'
})
export class TruncatorServiceFactory {
/**
* Token description prefix.
*/
private static get tokenDescriptionPrefix() { return 'TruncatorService'; }
/**
* TruncatorKind values.
*/
public static get TruncatorKindValues() {
return Object.values(TruncatorKind).filter((_) => !isNaN(Number(_))) as TruncatorKind[];
}
/**
* Module specific providers.
*/
public static get providers() {
return TruncatorServiceFactory.TruncatorKindValues.map((truncatorKind) => ({
provide: TruncatorServiceFactory.tokenDescription(truncatorKind), useFactory: (
persistenceService: PersistenceService
) => TruncatorServiceFactory.useFactory(truncatorKind, persistenceService),
deps: [PersistenceService]
}));
}
/**
* Constructs the Truncator service factory.
* ~constructor
*
*/
constructor(
) {
}
/**
* Constructs the truncator component. Static construction factory.
* ~static constructor
*
* @param truncatorKind The truncator kind injected dependency.
* @param deps The factory dependencies.
*/
public static useFactory(
truncatorKind: TruncatorKind,
...deps: (PersistenceService |
(PersistenceService)[])[]
) {
const serviceInstance = new TruncatorService(
deps[0] as PersistenceService
);
serviceInstance.truncatorKind = truncatorKind;
return serviceInstance;
}
/**
* Token description.
*
* @param truncatorKind The truncator kind injected dependency.
*/
public static tokenDescription(truncatorKind: TruncatorKind) {
return TruncatorServiceFactory.tokenDescriptionPrefix + TruncatorKind[truncatorKind];
}
/**
* Injection token providers.
*
* @param truncatorKind The truncator kind injected dependency.
* @param deps The factory dependencies.
*/
public static InjectionToken(
truncatorKind: TruncatorKind,
...deps: (PersistenceService |
(PersistenceService)[])[]
) {
return new InjectionToken<TruncatorService>(TruncatorServiceFactory.tokenDescription(truncatorKind), {
providedIn: 'root',
factory: () => TruncatorServiceFactory.useFactory(truncatorKind, ...deps)
});
}
}