auth.service.ts

import { Injectable } from '@angular/core';
import { User } from '../models/user';
import { Role } from '../models/role';
@Injectable()
export class AuthService {
    private user: User;
    isAuthorized() {
        return !!this.user;
    }
    hasRole(role: Role) {
        return this.isAuthorized() && this.user.Role === role;
    }
    login(role: Role) {
      this.user = { role: role };
    }
    logout() {
      this.user = null;
    }
}