opt-cc/static/src/app/login/login.guard.ts

import {Injectable} from '@angular/core';
import {ActivatedRouteSnapshot, CanActivate, Router, RouterStateSnapshot} from '@angular/router';
import {LoginService} from '../services/app-user-service/login-service';

@Injectable()
export class LoginGuardSQL implements CanActivate {

  constructor(private router: Router,
              private loginService: LoginService) {
  }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
    if (this.loginService.hasPermission(1)) {
      return true;
    }
    // not logged in so redirect to login page with the return url
    this.router.navigate(['/login'], {queryParams: {returnUrl: state.url}});
    return false;
  }
}

@Injectable()
export class LoginGuardHL implements CanActivate {

  constructor(private router: Router,
              private loginService: LoginService) {
  }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
    if (this.loginService.hasPermission(2)) {
      return true;
    }
    // not logged in so redirect to login page with the return url
    this.router.navigate(['/login'], {queryParams: {returnUrl: state.url}});
    return false;
  }
}

@Injectable()
export class LoginGuardMT implements CanActivate {

  constructor(private router: Router,
              private loginService: LoginService) {
  }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
    if (this.loginService.hasPermission(3)) {
      return true;
    }
    // not logged in so redirect to login page with the return url
    this.router.navigate(['/login'], {queryParams: {returnUrl: state.url}});
    return false;
  }
}

@Injectable()
export class LoginGuardAdmin implements CanActivate {

  constructor(private router: Router,
              private loginService: LoginService) {
  }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
    if (this.loginService.hasPermission(4)) {
      return true;
    }
    // not logged in so redirect to login page with the return url
    this.router.navigate(['/login'], {queryParams: {returnUrl: state.url}});
    return false;
  }
}