Interface that a class can implement to be a guard deciding if a route can be activated.
class UserToken {} class Permissions { canActivate(user: UserToken, id: string): boolean { return true; } } @Injectable() class CanActivateTeam implements CanActivate { constructor(private permissions: Permissions, private currentUser: UserToken) {} canActivate( route: ActivatedRouteSnapshot, state: RouterStateSnapshot ): Observable<boolean>|Promise<boolean>|boolean { return this.permissions.canActivate(this.currentUser, route.params.id); } } @NgModule({ imports: [ RouterModule.forRoot([ { path: 'team/:id', component: TeamCmp, canActivate: [CanActivateTeam] } ]) ], providers: [CanActivateTeam, UserToken, Permissions] }) class AppModule {}
You can alternatively provide a function with the canActivate
signature:
@NgModule({ imports: [ RouterModule.forRoot([ { path: 'team/:id', component: TeamCmp, canActivate: ['canActivateTeam'] } ]) ], providers: [ { provide: 'canActivateTeam', useValue: (route: ActivatedRouteSnapshot, state: RouterStateSnapshot) => true } ] }) class AppModule {}
interface CanActivate { canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) : Observable<boolean>|Promise<boolean>|boolean }
canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) : Observable<boolean>|Promise<boolean>|boolean
exported from @angular/router/index, defined in @angular/router/src/interfaces.ts
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https://v2.angular.io/docs/ts/latest/api/router/index/CanActivate-interface.html