validate_login

public function validate_login($from = "")
    {
        if ($this->crud_model->check_recaptcha() == false && get_frontend_settings('recaptcha_status') == true) {
            $this->session->set_flashdata('error_message', get_phrase('recaptcha_verification_failed'));
            redirect(site_url('home/login'), 'refresh');
        }

        $email = $this->input->post('email');
        $password = $this->input->post('password');
        $credential = array('email' => $email, 'password' => sha1($password), 'status' => 1);

        // Checking login credential for admin
        $query = $this->db->get_where('users', $credential);

        if ($query->num_rows() > 0) {
            $row = $query->row();
            $this->session->set_userdata('user_id', $row->id);
            $this->session->set_userdata('role_id', $row->role_id);
            $this->session->set_userdata('role', get_user_role('user_role', $row->id));
            $this->session->set_userdata('name', $row->first_name . ' ' . $row->last_name);
            $this->session->set_userdata('is_instructor', $row->is_instructor);
            $this->session->set_flashdata('flash_message', get_phrase('welcome') . ' ' . $row->first_name . ' ' . $row->last_name);
            if ($row->role_id == 1) {
                if ($this->input->post('rememberme')){
                    set_cookie("email",$email, 2 * 60);
                    set_cookie("password",$password, 2 * 60);
                    $this->session->set_userdata('admin_login', '1');
                redirect(site_url('admin/dashboard'), 'refresh');
                }else {
                    $this->session->set_userdata('admin_login', '1');
                    redirect(site_url('admin/dashboard'), 'refresh');
                }
            } else if ($row->role_id == 2) {
                if ($this->input->post('rememberme')){
                    set_cookie("email",$email, 2 * 60);
                    set_cookie("password",$password, 2 * 60);
                    $this->session->set_userdata('user_login', '1');

                if($this->session->userdata('url_history')){
                    redirect($this->session->userdata('url_history'), 'refresh');
                }
                redirect(site_url('home'), 'refresh');
                }else{
                    $this->session->set_userdata('user_login', '1');

                    if($this->session->userdata('url_history')){
                        redirect($this->session->userdata('url_history'), 'refresh');
                    }
                    redirect(site_url('home'), 'refresh');
                }
            }
        } else {
            $this->session->set_flashdata('error_message', get_phrase('invalid_login_credentials'));
            redirect(site_url('home/login'), 'refresh');
        }
    }