How would you protect a component being activated through the router?

To protect a component from being activated through the router in Angular, you would use a route guard, specifically the CanActivate guard. The CanActivate guard is an interface that allows you to implement logic to determine whether a route can be activated or not. If the guard returns true, the navigation to the route will continue; if it returns false, the navigation will be cancelled.

Here's a step-by-step approach to implementing a CanActivate guard:

1. Create a Guard Service:
   First, you need to create a service that implements the CanActivate interface. This service will contain the logic to determine whether the route should be activated.

   typescript Copy

   import { Injectable } from '@angular/core';
   import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, Router } from '@angular/router';
   import { Observable } from 'rxjs';
   
   @Injectable({
     providedIn: 'root'
   })
   export class AuthGuardService implements CanActivate {
     constructor(private router: Router) {}
   
     canActivate(
       route: ActivatedRouteSnapshot,
       state: RouterStateSnapshot
     ): Observable<boolean> | Promise<boolean> | boolean {
       // Your authentication logic here
       if (this.isLoggedIn()) {
         return true;
       } else {
         this.router.navigate(['/login']);
         return false;
       }
     }
   
     private isLoggedIn(): boolean {
       // Implement check for login status
       return !!localStorage.getItem('userToken');
     }
   }

2. Register the Guard:
   After creating the guard, you need to provide it in your module's providers array.

   typescript Copy

   @NgModule({
     // ...
     providers: [AuthGuardService],
     // ...
   })
   export class AppModule { }

3. Protect the Route:
   In your routing configuration, you can now protect your route by adding the canActivate property and assigning the guard service to it.

   typescript Copy

   const routes: Routes = [
     {
       path: 'protected',
       component: ProtectedComponent,
       canActivate: [AuthGuardService]
     },
     // other routes...
   ];
   
   @NgModule({
     imports: [RouterModule.forRoot(rou...