Twitch login, TTS Login, and basic policies ui.

src/app/twitch-auth-callback/twitch-auth-callback.component.spec.ts

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+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { TwitchAuthCallbackComponent } from './twitch-auth-callback.component';
+
+describe('TwitchAuthCallbackComponent', () => {
+  let component: TwitchAuthCallbackComponent;
+  let fixture: ComponentFixture<TwitchAuthCallbackComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [TwitchAuthCallbackComponent]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(TwitchAuthCallbackComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/twitch-auth-callback/twitch-auth-callback.component.ts

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+import { isPlatformBrowser } from '@angular/common';
+import { HttpClient } from '@angular/common/http';
+import { Component, Inject, OnInit, PLATFORM_ID } from '@angular/core';
+import { ActivatedRoute, Router } from '@angular/router';
+import { ApiAuthenticationService } from '../shared/services/api/api-authentication.service';
+import { environment } from '../../environments/environment';
+
+@Component({
+    selector: 'app-twitch-auth-callback',
+    standalone: true,
+    imports: [],
+    templateUrl: './twitch-auth-callback.component.html',
+    styleUrl: './twitch-auth-callback.component.scss'
+})
+export class TwitchAuthCallbackComponent implements OnInit {
+    private isBrowser: boolean;
+
+    constructor(private http: HttpClient, private auth: ApiAuthenticationService, private route: ActivatedRoute, private router: Router, @Inject(PLATFORM_ID) private platformId: Object) {
+        this.isBrowser = isPlatformBrowser(this.platformId)
+    }
+
+    ngOnInit(): void {
+        if (!this.isBrowser) {
+            return;
+        }
+
+        const code = this.route.snapshot.queryParamMap.get('code');
+        const scope = this.route.snapshot.queryParamMap.get('scope');
+        const state = this.route.snapshot.queryParamMap.get('state');
+
+        console.log('twitch callback', code, scope, state);
+        if (!code || !scope || !state)
+            return;
+
+        this.http.post(environment.API_HOST + '/auth/twitch/callback', { code, scope, state })
+            .subscribe((data: any) => {
+                console.log('twitch callback response', code, scope, state, data);
+                if (!data?.authenticated) {
+                    this.router.navigate(['/login?error=callback_error']);
+                    return;
+                }
+
+                localStorage.setItem('jwt', data.token);
+                this.auth.update();
+                this.router.navigate(['/tts-login']);
+            });
+    }
+}