/**
* @inheritDoc
*/
public function validateForm(array &$form, FormStateInterface $form_state)
{
parent::validateForm($form, $form_state);
// Check if config entity that's being created already exists.
$id = 'flags_languages.flag_mapping.' . $form_state->getValue('source');
if (!$this->config($id)->isNew()) {
$form_state->setErrorByName('source', $this->t('Mapping for this language already exists.'));
}
}
/**
* @inheritDoc
*/
public function buildForm(array $form, FormStateInterface $form_state)
{
/** @var FlagMapping $mapping */
$mapping = $this->entity;
$allLanguages = $this->languageManager->getAllDefinedLanguages();
$id = $mapping->getSource();
$form['title'] = ['#type' => 'item', '#markup' => isset($allLanguages[$id]) ? $allLanguages[$id] : $id];
$form = parent::buildForm($form, $form_state);
// We do not allow editing of source language which is entity's ID.
$form['source'] = ['#type' => 'value', '#value' => $mapping->getSource()];
return $form;
}