angular-docs-cn/public/docs/_examples/router/ts/app/auth-guard.service.ts

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TypeScript
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// #docplaster
// #docregion, admin-can-load
import { Injectable } from '@angular/core';
import {
CanActivate, Router,
ActivatedRouteSnapshot,
RouterStateSnapshot,
CanActivateChild,
NavigationExtras,
CanLoad, Route
} from '@angular/router';
import { AuthService } from './auth.service';
@Injectable()
export class AuthGuard implements CanActivate, CanActivateChild, CanLoad {
constructor(private authService: AuthService, private router: Router) {}
canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
let url: string = state.url;
return this.checkLogin(url);
}
canActivateChild(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
return this.canActivate(route, state);
}
canLoad(route: Route): boolean {
let url = `/${route.path}`;
return this.checkLogin(url);
}
// #enddocregion admin-can-load
checkLogin(url: string): boolean {
if (this.authService.isLoggedIn) { return true; }
// Store the attempted URL for redirecting
this.authService.redirectUrl = url;
// Create a dummy session id
let sessionId = 123456789;
// Set our navigation extras object
// that contains our global query params and fragment
let navigationExtras: NavigationExtras = {
queryParams: { 'session_id': sessionId },
fragment: 'anchor'
};
// Navigate to the login page with extras
this.router.navigate(['/login'], navigationExtras);
return false;
}
// #docregion admin-can-load
}