I have a angular2 active guard which handle if the user is not logged in, redirect it to login page:
import { Injectable } from "@angular/core";
import { CanActivate , ActivatedRouteSnapshot, RouterStateSnapshot, Router} from "@angular/router";
import {Observable} from "rxjs";
import {TokenService} from "./token.service";
@Injectable()
export class AuthenticationGuard implements CanActivate {
constructor (
private router : Router,
private token : TokenService
) { }
/**
* Check if the user is logged in before calling http
*
* @param route
* @param state
* @returns {boolean}
*/
canActivate (
route : ActivatedRouteSnapshot,
state : RouterStateSnapshot
): Observable<boolean> | Promise<boolean> | boolean {
if(this.token.isLoggedIn()){
return true;
}
this.router.navigate(['/login'],{ queryParams: { returnUrl: state.url }});
return;
}
}
I have to implement it on each route like :
const routes: Routes = [
{ path : '', component: UsersListComponent, canActivate:[AuthenticationGuard] },
{ path : 'add', component : AddComponent, canActivate:[AuthenticationGuard]},
{ path : ':id', component: UserShowComponent },
{ path : 'delete/:id', component : DeleteComponent, canActivate:[AuthenticationGuard] },
{ path : 'ban/:id', component : BanComponent, canActivate:[AuthenticationGuard] },
{ path : 'edit/:id', component : EditComponent, canActivate:[AuthenticationGuard] }
];
Is there any better way to implement canActive option without adding it to each path.
What I want is to add it on main route, and it should apply to all other routes. I have searched alot, but I could not find any useful solution
Thanks
You can introduce a componentless parent route and apply the guard there:
const routes: Routes = [
{path: '', canActivate:[AuthenticationGuard], children: [
{ path : '', component: UsersListComponent },
{ path : 'add', component : AddComponent},
{ path : ':id', component: UserShowComponent },
{ path : 'delete/:id', component : DeleteComponent },
{ path : 'ban/:id', component : BanComponent },
{ path : 'edit/:id', component : EditComponent }
]}
];
You can also subscribe to the router's route changes in your app.component's ngOnInit function and check authentication from there e.g.
this.router.events.subscribe(event => {
if (event instanceof NavigationStart && !this.token.isLoggedIn()) {
this.router.navigate(['/login'],{ queryParams: { returnUrl: state.url}});
}
});
I prefer this way of doing any kind of app wide check(s) when a route changes.
I think you should implement "child routing" which allow you to have a parent (with a path "admin" for example) and his childs.
Then you can apply a canactivate to the parent which will automatically restrict the access to all his child. For example if I want to access "admin/home" I'll need to go throught "admin" which is protectected by canActivate. You can even define a parent with an empty path "" if you want