D-Net

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

import {ActivatedRouteSnapshot, CanActivate, CanLoad, Route, Router, RouterStateSnapshot} from '@angular/router';

import {Observable} from 'rxjs/Observable';

import {Session} from './utils/helper.class';

import {LoginErrorCodes} from './utils/guardHelper.class';

import {filter, map} from "rxjs/operators";

import {UserManagementService} from "../services/user-management.service";

@Injectable()

export class LoginGuard implements CanActivate, CanLoad {

  constructor(private router: Router,

              private userManagementService: UserManagementService) {

  }

  check(path: string): Observable<boolean> | boolean {

    if (Session.isLoggedIn()) {

      const obs = this.userManagementService.getUserInfo(false).pipe(map(user => {

        return user !== null;

      }));

      obs.pipe(filter(isLoggedIn => !isLoggedIn)).subscribe(() => {

        this.router.navigate(['/user-info'], {queryParams: {'errorCode': LoginErrorCodes.NOT_LOGIN, path}});

      });

      return obs;

    } else {

      this.router.navigate(['/user-info'], {queryParams: {'errorCode': LoginErrorCodes.NOT_LOGIN, path}});

      return false;

    }

  }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | boolean {

    return this.check(state.url);

  }

  canLoad(route: Route): Observable<boolean> | Promise<boolean> | boolean {

    return this.check('/' + route.path);

  }

}