angular -如何创建一个canActivate防护来只允许来自另一个组件的重定向？

ng generate guard auth

import { Injectable } from '@angular/core';
import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, UrlTree, Router } from '@angular/router';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class AuthGuard implements CanActivate {

  constructor(private router: Router) {}

  canActivate(
    route: ActivatedRouteSnapshot,
    state: RouterStateSnapshot): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {
    // 这里可以添加你的逻辑来判断是否允许导航
    const allowedFrom = route.data.allowedFrom;
    const currentUrl = state.url;

    // 假设我们有一个方法来检查当前URL是否来自允许的组件
    if (this.isAllowedFrom(allowedFrom, currentUrl)) {
      return true;
    } else {
      // 如果不允许，则重定向到其他页面
      this.router.navigate(['/unauthorized']);
      return false;
    }
  }

  private isAllowedFrom(allowedFrom: string, currentUrl: string): boolean {
    // 这里实现你的逻辑来检查当前URL是否来自允许的组件
    // 例如，可以通过比较URL片段或查询参数来判断
    return currentUrl.includes(allowedFrom);
  }
}

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { ProtectedComponent } from './protected/protected.component';
import { AuthGuard } from './auth.guard';

const routes: Routes = [
  {
    path: 'protected',
    component: ProtectedComponent,
    canActivate: [AuthGuard],
    data: { allowedFrom: 'allowed-component' }
  },
  // 其他路由配置
];

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