function cas_form_user_login_form_alter in CAS 2.x

Same name and namespace in other branches

1. 8 cas.module \cas_form_user_login_form_alter()

Implements hook_form_FORM_ID_alter().

Modify the user login form.

File

./cas.module, line 219

Provides CAS authentication for Drupal.

Code

function cas_form_user_login_form_alter(&$form, FormStateInterface $form_state) {
  $config = Drupal::config('cas.settings');

  // Cached form must be busted if we alter CAS settings.
  $form['#cache']['tags'] = array_merge($form['#cache']['tags'], $config
    ->getCacheTags());

  // Add a link to login via CAS on the user login form.
  $enabled = $config
    ->get('login_link_enabled');
  if ($enabled) {
    $url = new Url('cas.login', [], [
      'attributes' => [
        'class' => [
          'cas-login-link',
        ],
      ],
    ]);
    $form['cas_login_link'] = [
      '#type' => 'link',
      '#url' => $url,
      '#title' => $config
        ->get('login_link_label'),
      '#weight' => -1,
    ];
  }
  $form['#validate'][] = '_cas_user_login_validate';
}