File

src/app/auth.guard.ts

Constructor

constructor(dataService: ApiService, router: Router)

Methods

canActivate
canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot)
Returns: boolean
isLogin
isLogin(routeUrl: string)
Returns: boolean
import {Injectable} from '@angular/core';
import {ActivatedRouteSnapshot, CanActivate, Router, RouterStateSnapshot} from '@angular/router';
import {ApiService} from './api.service';

@Injectable({
  providedIn: 'root'
})

export class AuthGuard implements CanActivate {
  constructor(private dataService: ApiService, private router: Router) {
  }

  /*! \brief
  This function checks the state of router and calls the boolean function isLogin() to check whether a user is logged in or not.
  */
  canActivate(
    route: ActivatedRouteSnapshot,
    state: RouterStateSnapshot
  ): boolean {
    const routeUrl: string = state.url;
    return this.isLogin(routeUrl);
  }

  /*! \brief
  This function calls Api Service to check the login status of the user and redirects the user to appropriate routes according to status.
  */

  isLogin(routeUrl: string): boolean {
    if (this.dataService.isLoggedIn()) {
      return true;
    }
    this.dataService.redirectUrl = routeUrl;
    this.router.navigate(['/login'], {queryParams: {returnUrl: routeUrl}});
  }
}

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