Configuring Angular routes based on service method invocation

I have my routes configured in @NgModule. I also have a service that determines which parts of the application to display based on specific conditions. I need to call this service and adjust the routes according to its output.

Issue: The route configuration is defined within an annotation, and I am unsure how to access the service in this setup.

To clarify, here is the current routing configuration I am looking to improve:

Current routing setup:

const appRoutes: Routes = [
    {
        path: '',
        redirectTo: 'first-route',
        pathMatch: 'full'
    },
    {
        path: 'first-route',
        component: FirstComponent,
        pathMatch: 'full'
    },
    {
        path: 'second-route',
        component: SecondComponent,
        pathMatch: 'full'
    },
    ...
];

@NgModule({
    imports: [RouterModule.forChild(appRoutes)],
    exports: [RouterModule]
})
export class MyRoutingModule {
}

The service responsible for changing the route setup:

@Injectable()
export class MyService {
    getAccessibleRoutes(): Observable<string[]> {...}
}

Query: How can I invoke the service and modify the routes?

Note: I have also explored discussions on "Dynamically adding routes in Angular" and "How we can add new routes dynamically into RouterModule(@NgModule imports)", but have not found a clear solution there.

Answer №1

If I understand your issue correctly, I recommend considering the use of route guards to help achieve your goal. By implementing guards, you can specify conditions for accessing routes without necessarily altering the route list itself.

For more information on route guards, please refer to the following link:

I hope this solution proves helpful to you.

import { Injectable } from '@angular/core';
import { CanActivate, Router, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
import { YourSecurityService } from './your-security.service';

@Injectable()
export class YourRouteGuardService implements CanActivate {

    constructor(
        private router: Router, 
        private yourSecurityService: YourSecurityService) {
    }

    canActivate(
        route: ActivatedRouteSnapshot, 
        state: RouterStateSnapshot): boolean {

        console.log(state.url); // Access the requested route here

        if (this.yourSecurityService.checkIfUserHaveAccess())
            return true;
        
        this.router.navigate(['your-route-to-redirect']);
        return false;
    }
}

Don't forget to apply the guard to your route:

const appRoutes: Routes = [
    {
        path: 'someroute',
        component: RouteComponent,
        canActivate: [YourRouteGuardService]
    },
    ...
]

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