feat: add Master Admin application functionality

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

@@ -0,0 +1,37 @@
+import { inject } from '@angular/core';
+import { CanActivateChildFn, Router } from '@angular/router';
+import { catchError, map, of } from 'rxjs';
+import { AuthService } from '../auth/auth.service';
+import { TokenStorageService } from '../auth/token-storage.service';
+
+export const authGuard: CanActivateChildFn = (_childRoute, state) => {
+  const authService = inject(AuthService);
+  const tokenStorage = inject(TokenStorageService);
+  const router = inject(Router);
+
+  const loginUrlTree = router.createUrlTree(['/auth/login'], {
+    queryParams: { returnUrl: state.url },
+  });
+
+  if (!authService.accessToken || !authService.currentUser) {
+    authService.logout();
+    return loginUrlTree;
+  }
+
+  if (!tokenStorage.isAccessTokenExpired()) {
+    return true;
+  }
+
+  if (!authService.refreshToken || tokenStorage.isRefreshTokenExpired()) {
+    authService.logout();
+    return loginUrlTree;
+  }
+
+  return authService.refreshAccessToken().pipe(
+    map(() => true),
+    catchError(() => {
+      authService.logout();
+      return of(loginUrlTree);
+    })
+  );
+};