Login E-Health

public function login_post()
    {
        $username = trim($this->post('username'));
        $password = trim($this->post('password'));

        if ($username == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Username harus diisi.',
            ];
        } elseif ($password == '') {
            $response = [
                'resp_error' => true,
                'resp_msg'   => 'Password harus diisi.',
            ];
        } else {
            $checkUser = $this->db->get_where('ehealth_users', array('user_username' => $username))->row();
            if (count($checkUser) == 0) {
                $response = [
                    'resp_error' => true,
                    'resp_msg'   => 'Username Tidak Terdaftar.',
                ];
            } else {
                if ($checkUser->user_status == 'Non Active') {
                    $response = [
                        'resp_error' => true,
                        'resp_msg'   => 'Akun Anda belum di Aktifkan.',
                    ];
                } else {
                    $checkLogin = $this->db->get_where('ehealth_users', array('user_username' => $username, 'user_password' => sha1($password), 'user_status' => 'Active'))->row();
                    if (count($checkLogin) == 0) {
                        $response = [
                            'resp_error' => true,
                            'resp_msg'   => 'Password Anda Salah.',
                        ];
                    } else {
                        if ($checkLogin->user_image != '') {
                            $avatar = base_url('icon/' . $checkLogin->user_image);
                        } else {
                            $avatar = base_url('img/no-avatar.png');
                        }

                        $response = [
                            'resp_error' => false,
                            'resp_msg'   => 'success',
                            'username'   => trim($checkLogin->user_username),
                            'nama'       => trim($checkLogin->user_name),
                            'no_telp'    => trim($checkLogin->user_phone),
                            'email'      => trim($checkLogin->user_email),
                            'avatar'     => $avatar,
                            'level'      => trim($checkLogin->user_level),
                        ];
                    }
                }
            }
        }

        $this->response($response, 200);
    }