重定向到基于用户角色的惰性模块

问题描述

在我的 angular 8 应用程序中，我有 3 个延迟加载模块.每个模块用于特定用户的角色.我正在使用 canActivate 接口进行身份验证和角色保护.
对于以下路线

In my angular 8 application, I have 3 lazy-loading modules. Each module is for a specific user's role. I'm using canActivate interface for Auth and Role Guard.
For the following route

{ path : '' , pathMatch : 'full' , redirectTo : ''}

我应该如何使用 redirectTo 属性，以便它重定向到基于用户角色的延迟加载路由.这是路由模块的代码.

app.routing.module.ts

how should I use redirectTo property, so it redirects to a lazyloaded route based on user role .This is the code for routing module.

app.routing.module.ts

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';

const routes: Routes = [
  { path : '' , pathMatch: 'full' , redirectTo : ''},
  { path : 'admin'  , loadChildren : () => import('./modules/admin/admin.module').then(mod => mod.AdminModule) , canActivate : [AuthGuardService] , data : { role : 'admin'}} ,
  { path : 'member' , loadChildren : () => import('./modules/member/member.module').then(mod => mod.MemberModule) , canActivate : [AuthGuardService] ,   data : { role : 'member'}} ,
  { path : 'user'   , loadChildren : () => import('./modules/user/user.module').then(mod => mod.UserModule) , canActivate : [AuthGuardService] , data : { role : 'user'}} ,

  { path : '**' , component : NotFoundComponent }
];
@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

AuthGuardService.ts

import { Injectable } from '@angular/core';
import { Router , CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
import { Observable } from 'rxjs';
import { AuthService } from '../auth-service/auth-service.service';

@Injectable({
  providedIn: 'root'
})
export class AuthGuardService implements CanActivate {
  constructor(
      private router: Router,
      private authService: AuthService
  ) {}

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) : Observable<boolean> | Promise<boolean> | boolean {
    const currentUser = this.authService.userVal;
    const role       = route.data.role;
    if (currentUser) {
      if(role && role.indexOf(currentUser.role) > -1)
        return true;
      else
        return false;
    }
    return false;
  }
}

推荐答案

再次感谢 @DeborahK.完成此Github Disucssion后，这是有效的解决方法.

once again thanks to @DeborahK. After going through this Github Disucssion, This is the workaround which works.

app.routing.module.ts

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';

const routes: Routes = [
  { path : '' , pathMatch: 'full' , redirectTo : '' , canActivate : [RedirectGuardService]},
  { path : 'admin'  , loadChildren : () => import('./modules/admin/admin.module').then(mod => mod.AdminModule) , canActivate : [AuthGuardService] , data : { role : 'admin'}} ,
  { path : 'member' , loadChildren : () => import('./modules/member/member.module').then(mod => mod.MemberModule) , canActivate : [AuthGuardService] ,   data : { role : 'member'}} ,
  { path : 'user'   , loadChildren : () => import('./modules/user/user.module').then(mod => mod.UserModule) , canActivate : [AuthGuardService] , data : { role : 'user'}} ,

  { path : '**' , component : NotFoundComponent }
];
@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

redirect-guard.service.ts

import { Injectable } from '@angular/core';
import { CanActivate, Router, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
import { AuthService } from '../auth-service/auth-service.service';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class RedirectGuardService implements CanActivate {
  constructor(
      private router: Router,
      private authService: AuthService
  ) {}

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) : Observable<boolean> | Promise<boolean> | boolean {
    const user = this.authService.userVal;
    if (user) {
      this.router.navigate(['/'+ user.role]);
      return true;
    }
    this.router.navigate(['/login'], { queryParams: { returnUrl: state.url }});
    return false;
  }
}

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