Created auth module. Created Visitor auth guard for non-logged in users.

src/app/auth/impersonation/impersonation.component.html

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+@if (isAdmin()) {
+<mat-card appearance="outlined">
+  <mat-card-header>
+    <mat-card-title> Impersonation</mat-card-title>
+    <mat-card-subtitle>Impersonate as another user</mat-card-subtitle>
+  </mat-card-header>
+  <mat-card-actions>
+    <mat-form-field>
+      <mat-label>User to impersonate</mat-label>
+      <mat-select (selectionChange)="onChange($event)" [(value)]="impersonated">
+        <mat-option>{{getUsername()}}</mat-option>
+        @for (user of users; track user.id) {
+        <mat-option [value]="user.id">{{ user.name }}</mat-option>
+        }
+      </mat-select>
+    </mat-form-field>
+  </mat-card-actions>
+</mat-card>
+}

src/app/auth/impersonation/impersonation.component.spec.ts

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

src/app/auth/impersonation/impersonation.component.ts

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+import { Component, Inject, OnInit, PLATFORM_ID } from '@angular/core';
+import { ApiAuthenticationService } from '../../shared/services/api/api-authentication.service';
+import { MatCardModule } from '@angular/material/card';
+import { MatSelectModule } from '@angular/material/select';
+import { HttpClient } from '@angular/common/http';
+import { isPlatformBrowser } from '@angular/common';
+import { environment } from '../../../environments/environment';
+import EventService from '../../shared/services/EventService';
+import { HermesClientService } from '../../hermes-client.service';
+import { Router } from '@angular/router';
+
+@Component({
+    selector: 'impersonation',
+    standalone: true,
+    imports: [MatCardModule, MatSelectModule],
+    templateUrl: './impersonation.component.html',
+    styleUrl: './impersonation.component.scss'
+})
+export class ImpersonationComponent implements OnInit {
+    impersonated: string | undefined;
+    users: { id: string, name: string }[];
+
+    constructor(private hermes: HermesClientService, private auth: ApiAuthenticationService, private router: Router, private events: EventService, private http: HttpClient, @Inject(PLATFORM_ID) private platformId: Object) {
+        this.users = []
+    }
+
+    ngOnInit(): void {
+        if (!isPlatformBrowser(this.platformId)) {
+            return;
+        }
+
+        this.http.get(environment.API_HOST + '/admin/users', {
+            headers: {
+                'Authorization': 'Bearer ' + localStorage.getItem('jwt')
+            }
+        }).subscribe((data: any) => {
+            this.users = data.filter((d: any) => d.name != this.auth.getUsername());
+            const id = this.auth.getImpersonatedId();
+            if (id && this.users.find(u => u.id == id)) {
+                this.impersonated = id;
+            }
+        });
+    }
+
+    public isAdmin() {
+        return this.auth.isAdmin();
+    }
+
+    public getUsername() {
+        return this.auth.getUsername();
+    }
+
+    public onChange(e: any) {
+        console.log('impersonate befre', e.value);
+        if (!e.value) {
+            this.http.delete(environment.API_HOST + '/admin/impersonate', {
+                headers: {
+                    'Authorization': 'Bearer ' + localStorage.getItem('jwt')
+                },
+                body: {
+                    impersonation: e.value
+                }
+            }).subscribe((data: any) => {
+                this.hermes.disconnect();
+                this.events.emit('impersonation', e.value);
+                this.router.navigate(['/tts-login']);
+            });
+        } else {
+            this.http.put(environment.API_HOST + '/admin/impersonate', {
+                impersonation: e.value
+            }, {
+                headers: {
+                    'Authorization': 'Bearer ' + localStorage.getItem('jwt')
+                }
+            }).subscribe((data: any) => {
+                this.hermes.disconnect();
+                this.events.emit('impersonation', e.value);
+                this.router.navigate(['/tts-login']);
+            });
+        }
+    }
+}