Angular 6+中基于角色的重定向

enum Role {
  Admin = 'admin',
  User = 'user',
  Guest = 'guest'
}

import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root'
})
export class RoleService {
  private currentUserRole: Role;

  constructor() { }

  setCurrentUserRole(role: Role) {
    this.currentUserRole = role;
  }

  getCurrentUserRole(): Role {
    return this.currentUserRole;
  }
}

import { Injectable } from '@angular/core';
import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, Router } from '@angular/router';
import { RoleService } from './role.service';
import { Role } from './role.enum';

@Injectable({
  providedIn: 'root'
})
export class RoleGuard implements CanActivate {
  constructor(private roleService: RoleService, private router: Router) {}

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
    const allowedRoles = route.data.allowedRoles as Role[];
    const currentUserRole = this.roleService.getCurrentUserRole();

    if (allowedRoles.includes(currentUserRole)) {
      return true;
    } else {
      this.router.navigate(['/unauthorized']);
      return false;
    }
  }
}

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { HomeComponent } from './home.component';
import { AdminComponent } from './admin.component';
import { UserComponent } from './user.component';
import { GuestComponent } from './guest.component';
import { UnauthorizedComponent } from './unauthorized.component';
import { RoleGuard } from './role.guard';
import { Role } from './role.enum';

const routes: Routes = [
  { path: '', component: HomeComponent },
  { path: 'admin', component: AdminComponent, canActivate: [RoleGuard], data: { allowedRoles: [Role.Admin] } },
  { path: 'user', component: UserComponent, canActivate: [RoleGuard], data: { allowedRoles: [Role.Admin, Role.User] } },
  { path: 'guest', component: GuestComponent, canActivate: [RoleGuard], data: { allowedRoles: [Role.Admin, Role.User, Role.Guest] } },
  { path: 'unauthorized', component: UnauthorizedComponent },
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }