80 lines
2.2 KiB
TypeScript
80 lines
2.2 KiB
TypeScript
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/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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/**
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* This is an example of a Hero-oriented InMemoryDbService.
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*
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* For demonstration purposes, it can return the database
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* synchronously as an object (default),
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* as an observable, or as a promise.
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*
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* Add the following line to `AppModule.imports`
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* InMemoryWebApiModule.forRoot(HeroInMemDataService) // or HeroInMemDataOverrideService
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*/
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import {Injectable} from '@angular/core';
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import {InMemoryDbService, RequestInfo} from 'angular-in-memory-web-api';
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import {Observable, of} from 'rxjs';
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import {delay} from 'rxjs/operators';
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interface Person {
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id: string|number;
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name: string;
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}
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interface PersonResponse {
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heroes: Person[];
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stringers: Person[];
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nobodies: Person[];
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}
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@Injectable()
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export class HeroInMemDataService implements InMemoryDbService {
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createDb(reqInfo?: RequestInfo):
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Observable<PersonResponse>|Promise<PersonResponse>|PersonResponse {
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const heroes = [
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{id: 1, name: 'Windstorm'}, {id: 2, name: 'Bombasto'}, {id: 3, name: 'Magneta'},
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{id: 4, name: 'Tornado'}
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];
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const nobodies: any[] = [];
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// entities with string ids that look like numbers
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const stringers = [{id: '10', name: 'Bob String'}, {id: '20', name: 'Jill String'}];
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// default returnType
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let returnType = 'object';
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// let returnType = 'observable';
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// let returnType = 'promise';
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// demonstrate POST commands/resetDb
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// this example clears the collections if the request body tells it to do so
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if (reqInfo) {
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const body = reqInfo.utils.getJsonBody(reqInfo.req) || {};
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if (body.clear === true) {
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heroes.length = 0;
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nobodies.length = 0;
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stringers.length = 0;
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}
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// 'returnType` can be 'object' | 'observable' | 'promise'
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returnType = body.returnType || 'object';
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}
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const db = {heroes, nobodies, stringers};
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switch (returnType) {
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case 'observable':
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return of(db).pipe(delay(10));
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case 'promise':
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return new Promise(resolve => setTimeout(() => resolve(db), 10));
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default:
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return db;
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}
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}
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}
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