90 lines
3.3 KiB
TypeScript
90 lines
3.3 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 with method overrides.
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*/
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import {Injectable} from '@angular/core';
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import {getStatusText, ParsedRequestUrl, RequestInfo, RequestInfoUtilities, ResponseOptions, STATUS} from 'angular-in-memory-web-api';
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import {Observable} from 'rxjs';
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import {HeroInMemDataService} from './hero-in-mem-data-service';
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const villains = [
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// deliberately using string ids that look numeric
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{id: 100, name: 'Snidley Wipsnatch'}, {id: 101, name: 'Boris Badenov'},
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{id: 103, name: 'Natasha Fatale'}
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];
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// Pseudo guid generator
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function guid() {
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const s4 = () => Math.floor((1 + Math.random()) * 0x10000).toString(16).substring(1);
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return s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
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}
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@Injectable()
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export class HeroInMemDataOverrideService extends HeroInMemDataService {
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// Overrides id generator and delivers next available `id`, starting with 1001.
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genId<T extends {id: any}>(collection: T[], collectionName: string): any {
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if (collectionName === 'nobodies') {
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return guid();
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} else if (collection) {
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return 1 + collection.reduce((prev, curr) => Math.max(prev, curr.id || 0), 1000);
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}
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}
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// HTTP GET interceptor
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get(reqInfo: RequestInfo): Observable<any>|undefined {
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const collectionName = reqInfo.collectionName;
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if (collectionName === 'villains') {
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return this.getVillains(reqInfo);
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}
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return undefined; // let the default GET handle all others
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}
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// HTTP GET interceptor handles requests for villains
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private getVillains(reqInfo: RequestInfo) {
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return reqInfo.utils.createResponse$(() => {
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const collection = villains.slice();
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const dataEncapsulation = reqInfo.utils.getConfig().dataEncapsulation;
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const id = reqInfo.id;
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const data = id == null ? collection : reqInfo.utils.findById(collection, id);
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const options: ResponseOptions = data ?
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{body: dataEncapsulation ? {data} : data, status: STATUS.OK} :
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{body: {error: `'Villains' with id='${id}' not found`}, status: STATUS.NOT_FOUND};
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return this.finishOptions(options, reqInfo);
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});
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}
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// parseRequestUrl override
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// Do this to manipulate the request URL or the parsed result
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// into something your data store can handle.
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// This example turns a request for `/foo/heroes` into just `/heroes`.
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// It leaves other URLs untouched and forwards to the default parser.
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// It also logs the result of the default parser.
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parseRequestUrl(url: string, utils: RequestInfoUtilities): ParsedRequestUrl {
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const newUrl = url.replace(/\/foo\/heroes/, '/heroes');
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return utils.parseRequestUrl(newUrl);
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}
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responseInterceptor(resOptions: ResponseOptions, reqInfo: RequestInfo) {
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if (resOptions.headers) {
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resOptions.headers = resOptions.headers.set('x-test', 'test-header');
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}
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return resOptions;
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}
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private finishOptions(options: ResponseOptions, {headers, url}: RequestInfo) {
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options.statusText = options.status == null ? undefined : getStatusText(options.status);
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options.headers = headers;
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options.url = url;
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return options;
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}
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}
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