we_bstly-web/src/app/auth/auth.guard.ts

import {Injectable} from '@angular/core';
import {Router} from '@angular/router';
import {    CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot} from '@angular/router';
import {AuthService} from '../services/auth.service';

@Injectable({
    providedIn: 'root'
})
export class AuthUpdateGuard implements CanActivate {
    constructor(private authService: AuthService) {}

    canActivate(next: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
        this.authService.getAuth().catch(function(error) {});
        return true;
    }
}

@Injectable({
    providedIn: 'root'
})
export class AuthGuard implements CanActivate {
    constructor(private authService: AuthService, private router: Router) {}

    canActivate(next: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
        const that = this;
        return this.authService.getAuth().then(response => {
            return true;
        }).catch(function(error) {
            return that.router.parseUrl('/unavailable');
        });
    }
}

@Injectable({
    providedIn: 'root'
})
export class AuthenticatedGuard implements CanActivate {
    constructor(private authService: AuthService, private router: Router) {}

    canActivate(next: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
        const that = this;
        return this.authService.getAuth().then((data: any) => {
            if(!data.authenticated) {
                this.router.navigateByUrl('/login');
                return false;
            }
            return true;
        }).catch(function(error) {
            return that.router.parseUrl('/unavailable');
        });
    }
}

@Injectable({
    providedIn: 'root'
})
export class AnonymousGuard implements CanActivate {
    constructor(private authService: AuthService, private router: Router) {}

    canActivate(next: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
        const that = this;
        return this.authService.getAuth().then((data: any) => {
            if(data.authenticated) {
                this.router.navigateByUrl('/account/info');
                return false;
            }
            return true;
        }).catch(function(error) {
            return that.router.parseUrl('/unavailable');
        });
    }

}