function comment_form_validate

Form validation handler for comment_form().

See also

comment_form_submit()

File

core/modules/comment/comment.module, line 2051

Enables users to comment on published content.

Code

function comment_form_validate($form, &$form_state) {
  global $user;

  entity_form_field_validate('comment', $form, $form_state);

  if (!empty($form_state['values']['cid'])) {
    // Verify the name in case it is being changed from being anonymous.
    $account = user_load_by_name($form_state['values']['name']);
    $form_state['values']['uid'] = $account ? $account->uid : 0;

    if ($form_state['values']['date'] && strtotime($form_state['values']['date']) === FALSE) {
      form_set_error('date', t('You have to specify a valid date.'));
    }
    if ($form_state['values']['name'] && !$form_state['values']['is_anonymous'] && !$account) {
      form_set_error('name', t('You have to specify a valid author.'));
    }
  }
  elseif ($form_state['values']['is_anonymous']) {
    // Validate anonymous comment author fields (if given). If the (original)
    // author of this comment was an anonymous user, verify that no registered
    // user with this name exists.
    if ($form_state['values']['name']) {
      $query = db_select('users', 'u');
      $query->addField('u', 'uid', 'uid');
      $taken = $query
      ->condition('name', db_like($form_state['values']['name']), 'LIKE')
        ->countQuery()
        ->execute()
        ->fetchField();
      if ($taken) {
        form_set_error('name', t('The name you used is a registered username. If it belongs to you, then login to post. If not, then use another name.'));
      }
    }
  }
}