opensourcepos/app/Controllers/Login.php

<?php

namespace App\Controllers;

use App\Libraries\MY_Migration;
use App\Models\Employee;
use CodeIgniter\HTTP\RedirectResponse;
use CodeIgniter\Model;
use Config\OSPOS;
use Config\Services;

/**
 * @property employee employee
 */
class Login extends BaseController
{
    public Model $employee;

    /**
     * @return RedirectResponse|string
     */
    public function index(): string|RedirectResponse
    {
        $this->employee = model(Employee::class);
        if (!$this->employee->is_logged_in()) {
            $migration = new MY_Migration(config('Migrations'));
            $config = config(OSPOS::class)->settings;

            $gcaptcha_enabled = array_key_exists('gcaptcha_enable', $config)
                ? $config['gcaptcha_enable']
                : false;

            $migration->migrate_to_ci4();

            $validation = Services::validation();

            $data = [
                'has_errors'       => false,
                'is_latest'        => $migration->is_latest(),
                'latest_version'   => $migration->get_latest_migration(),
                'gcaptcha_enabled' => $gcaptcha_enabled,
                'config'           => $config,
                'validation'       => $validation
            ];

            if ($this->request->getMethod() !== 'POST') {
                return view('login', $data);
            }

            $rules = ['username' => 'required|login_check[data]'];
            $messages = [
                'username' => [
                    'required'    => lang('Login.required_username'),
                    'login_check' => lang('Login.invalid_username_and_password'),
                ]
            ];

            if (!$this->validate($rules, $messages)) {
                $data['has_errors'] = !empty($validation->getErrors());

                return view('login', $data);
            }

            if (!$data['is_latest']) {
                set_time_limit(3600);

                $migration->setNamespace('App')->latest();
                return redirect()->to('login');
            }
        }

        return redirect()->to('home');
    }
}