74 lines
2.1 KiB
TypeScript
74 lines
2.1 KiB
TypeScript
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import { Injectable } from '@angular/core';
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import { HttpRequest, HttpResponse, HttpHandler, HttpEvent, HttpInterceptor, HTTP_INTERCEPTORS } from '@angular/common/http';
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import { Observable, of, throwError } from 'rxjs';
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import { delay, mergeMap, materialize, dematerialize } from 'rxjs/operators';
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let users = JSON.parse(localStorage.getItem('users')) || [];
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@Injectable()
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export class FakeBackend implements HttpInterceptor {
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intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
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const { url, method, headers, body } = request;
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return of(null)
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.pipe(mergeMap(handleRoute))
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.pipe(materialize())
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.pipe(delay(500))
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.pipe(dematerialize());
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function handleRoute() {
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switch (true) {
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case url.endsWith('fake_login') && method === 'POST':
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return authenticate();
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case url.endsWith('fake_registration') && method === 'POST':
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return register();
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default:
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return next.handle(request);
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}
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}
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function authenticate() {
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const { username, password } = body;
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const user = users.find(x => x.username === username.value && x.password === password.value);
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if (!user) {
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console.log(password);
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return error('Username or password is incorrect.');
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}
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return ok({
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id: user.id,
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username: user.username,
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token: 'fake-jwt-token',
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});
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}
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function register() {
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const user = body;
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if (users.find(x => x.username === user.username)) {
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return error('Username ' + user.username + ' is already taken.');
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}
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user.id = users.length ? Math.max(...users.map(x => x.id)) + 1 : 1;
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users.push(user);
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localStorage.setItem('users', JSON.stringify(users));
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console.log('Register user: ' + user);
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return ok();
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}
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function ok(body?) {
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return of(new HttpResponse({ status: 200, body }));
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}
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function error(message) {
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return throwError({ error: { message } });
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}
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}
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}
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export const fakeBackendProvider = {
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provide: HTTP_INTERCEPTORS,
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useClass: FakeBackend,
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multi: true,
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}
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