Chore: Upgrade to Angular v18

Chore: Upgrade to Python 3.12
Chore: Upgrade to psycopg3

bookie/src/app/auth/auth-guard.service.ts

@@ -1,34 +1,26 @@
-import { Injectable } from '@angular/core';
-import { Router, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
+import { inject } from '@angular/core';
+import { CanActivateFn } from '@angular/router';
+import { Router } from '@angular/router';
 
 import { ToasterService } from '../core/toaster.service';
 
 import { AuthService } from './auth.service';
 
-@Injectable({ providedIn: 'root' })
-export class AuthGuard {
-  constructor(
-    private router: Router,
-    private authService: AuthService,
-    private toaster: ToasterService,
-  ) {}
-
-  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
-    const { user } = this.authService;
-    const permission =
-      route.data['permission'] === undefined
-        ? route.data['permission']
-        : route.data['permission'].replace(/ /g, '-').toLowerCase();
-    if (!user) {
-      // not logged in so redirect to login page with the return url
-      this.router.navigate(['/login'], { queryParams: { returnUrl: state.url } });
-      return false;
-    }
-    if (permission !== undefined && !this.authService.allowed(permission)) {
-      this.toaster.show('Error', 'You do not have the permission to access this area.');
-      return false;
-    }
-    // logged in so return true
-    return true;
+export const authGuard: CanActivateFn = (route, state) => {
+  const user = inject(AuthService).user;
+  const permission =
+    route.data['permission'] === undefined
+      ? route.data['permission']
+      : route.data['permission'].replace(/ /g, '-').toLowerCase();
+  if (!user) {
+    // not logged in so redirect to login page with the return url
+    inject(Router).navigate(['/login'], { queryParams: { returnUrl: state.url } });
+    return false;
   }
-}
+  if (permission !== undefined && user.perms.indexOf(permission) === -1) {
+    inject(ToasterService).show('Danger', 'You do not have the permission to access this area.');
+    return false;
+  }
+  // logged in so return true
+  return true;
+};