polygerrit-ui/app/services/app-context.ts

/**
 * @license
 * Copyright (C) 2020 The Android Open Source Project
 *
 * 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 {FlagsService} from './flags/flags';
import {EventEmitterService} from './gr-event-interface/gr-event-interface';
import {ReportingService} from './gr-reporting/gr-reporting';
import {AuthService} from './gr-auth/gr-auth';

export interface AppContext {
  flagsService: FlagsService;
  reportingService: ReportingService;
  eventEmitter: EventEmitterService;
  authService: AuthService;
}

/**
 * The AppContext holds immortal singleton instances of services. It's a
 * convenient way to provide singletons that can be swapped out for testing.
 *
 * AppContext is initialized in ./app-context-init.js
 *
 * It is guaranteed that all fields in appContext are always initialized
 * (except for shared gr-diff)
 */
export const appContext: AppContext = {} as AppContext;