Add route parameter handling for appeal paths and enhance AuthGuard to support login via code query parameter

frontend/src/app/app.routes.ts

@@ -118,18 +118,27 @@ export const routes: Routes = [
     path: 'forms',
     loadComponent: () => import('./pages/forms/forms.component').then(m => m.FormsComponent)
   },
+  {
+    path: 'appeal/:code',
+    redirectTo: 'forms/appeal/:code',
+    pathMatch: 'full'
+  },
   {
     path: 'appeal',
     redirectTo: 'forms/appeal',
     pathMatch: 'full'
   },
+  {
+    path: 'forms/appeal/:code',
+    loadComponent: () => import('./pages/forms/appeal/appeal.component').then(m => m.AppealComponent),
+    canActivate: [AuthGuard],
+    data: {requiredAuthorizations: ['SCOPE_user']}
+  },
   {
     path: 'forms/appeal',
     loadComponent: () => import('./pages/forms/appeal/appeal.component').then(m => m.AppealComponent),
     canActivate: [AuthGuard],
-    data: {
-      requiredAuthorizations: ['SCOPE_user']
-    }
+    data: {requiredAuthorizations: ['SCOPE_user']}
   },
   {
     path: 'forms/sent',

frontend/src/app/guards/auth.guard.ts

@@ -1,9 +1,10 @@
 import {Injectable} from '@angular/core';
 import {ActivatedRouteSnapshot, CanActivate, Router, RouterStateSnapshot, UrlTree} from '@angular/router';
-import {map, Observable} from 'rxjs';
+import {from, isObservable, map, Observable, of, switchMap} from 'rxjs';
 import {AuthService} from '@services/auth.service';
 import {MatDialog} from '@angular/material/dialog';
 import {LoginDialogComponent} from '@shared-components/login/login.component';
+import {catchError} from 'rxjs/operators';
 
 @Injectable({
   providedIn: 'root'
@@ -21,6 +22,20 @@ export class AuthGuard implements CanActivate {
     route: ActivatedRouteSnapshot,
     state: RouterStateSnapshot
   ): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {
+    const code = route.paramMap.get('code');
+    if (code) {
+      return this.authService.login(code).pipe(
+        switchMap(() => {
+          const result = this.canActivateInternal(route, state);
+          return isObservable(result) ? result : result instanceof Promise ? from(result) : of(result);
+        }),
+        catchError(() => of(this.router.createUrlTree(['/'])))
+      );
+    }
+    return this.canActivateInternal(route, state);
+  }
+
+  private canActivateInternal(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {
     if (!this.authService.isAuthenticated$()) {
       this.router.createUrlTree(['/']);
       const dialogRef = this.dialog.open(LoginDialogComponent, {