class PhpassHooks

class PhpassHooks {
    
    /**
     * Implements hook_help().
     */
    public function help($route_name, RouteMatchInterface $route_match) {
        switch ($route_name) {
            case 'help.page.phpass':
                $output = '';
                $output .= '<h2>' . t('About') . '</h2>';
                $output .= '<p>' . t('The Password Compatibility module provides the password checking algorithm for user accounts created with Drupal prior to version 10.1.0. For more information, see the <a href=":phpass">online documentation for the Password Compatibility module</a>.', [
                    ':phpass' => 'https://www.drupal.org/docs/core-modules-and-themes/core-modules/password-compatibility-module',
                ]) . '</p>';
                $output .= '<p>' . t('Drupal 10.1.0 and later use a different algorithm to compute the hashed password. This provides better security against brute-force attacks. The hashed passwords are different from the ones computed with Drupal versions before 10.1.0.') . '</p>';
                $output .= '<p>' . t('When the Password Compatibility module is installed, a user can log in with a username and password created before Drupal 10.1.0. The first time these credentials are used, a new hash is computed and saved. From then on, the user will be able to log in with the same username and password whether or not this module is installed.') . '</p>';
                $output .= '<p>' . t('Passwords created before Drupal 10.1.0 <strong>will not work</strong> unless they are used at least once while this module is installed. Make sure that you can log in before uninstalling this module.') . '</p>';
                return $output;
        }
    }
    
    /**
     * Implements hook_form_FORM_ID_alter() for system_modules_uninstall_confirm_form.
     */
    public function formSystemModulesUninstallConfirmFormAlter(array &$form, FormStateInterface $form_state) : void {
        $modules = \Drupal::keyValueExpirable('modules_uninstall')->get(\Drupal::currentUser()->id());
        if (!in_array('phpass', $modules)) {
            return;
        }
        \Drupal::messenger()->addWarning(t('Make sure that you can log in before uninstalling the Password Compatibility module. For more information, see the <a href=":phpass">online documentation for the Password Compatibility module</a>.', [
            ':phpass' => 'https://www.drupal.org/docs/core-modules-and-themes/core-modules/password-compatibility-module',
        ]));
    }

}