mean-guide-frontend/src/app/auth/auth.guard.ts

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import { CanActivate, Router } from '@angular/router';
import { AuthService } from './auth.service';
import { Injectable } from '@angular/core';

@Injectable()
export class AuthGuard implements CanActivate {
  constructor(private authService: AuthService, private router: Router) {}

  canActivate(
    route: import('@angular/router').ActivatedRouteSnapshot,
    state: import('@angular/router').RouterStateSnapshot
  ):
    | boolean
    | import('@angular/router').UrlTree
    | import('rxjs').Observable<boolean | import('@angular/router').UrlTree>
    | Promise<boolean | import('@angular/router').UrlTree> {
    const isAuth = this.authService.getIsAuthenticated();
    if (!isAuth){
      this.router.navigate['/auth/login']
    }
    return isAuth
  }
}