How to create user validation with access levels in codeigniter?

Question

I have this model and control that checks and validates users registered in the table tb_users database. I need a script that checks whether the user is 0 or 1 in the column nv_nivel. If the user is equal to 0 it directs to redirect('usuario/home', 'refresh'); if it equals 1 directs to redirect('admin/home', 'refresh');

Follow the code below Model and Controller.

-> Model

   class Login_model extends CI_Model {

    function ValidaLogin() {
        $this->db->where('hl_email', $this->input->post('email'));
        $this->db->where('pw_password', md5($this->input->post('senha')));
        $query = $this->db->get('tb_user');
        if ($query->num_rows == 1) {
            return true;
        }
    }
}

-> controller

public function valida() {

        $this->load->model('login_model'); //Carrega o model
        $query = $this->login_model->ValidaLogin(); //Chama a função da Model que checa o usuário no BD

        if ($query) { //Se o Usuário e senha existir no mesmo registro...
            $data = array(
                'login' => $this->input->post('email'),
                'is_logged_in' => true
            );
            $this->session->set_userdata($data);
            redirect('usuario/home', 'refresh');
        } else { // incorreto username ou password
            $info['msg'] = "Informações incorretas";
            $this->load->view('header_html');
            $this->load->view('header_view');
            $this->load->view('login/login_view', $info);
            $this->load->view('footer_view');
            $this->load->view('footer_html');
        }
    }

Answer 1

The first option you have is to create this "privilege system" on your arm. Like?

In your user table or in a related third, create a column called role or function and determine such a value.

Then breaking with if, we can distinguish the role of the user and determine something for him. For example:

if ($user->role == 1) {
    // é administrador
} else {
   // não é administrador
}

Or, if you want, you can use a ready-made library, such as the Ion Auth.

Unfortunately the IC does not have a role Provider native.

Answer 2

What you need is a ACL - ACESS CONTROL LIST, there is a ready that is very good called Ion Auth.

Visit the website Ion Auth Docs, and see its documentation, download and configure in your project.