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<?php
namespace Drupal\language\Form;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Language\LanguageManager;
use Drupal\language\Entity\ConfigurableLanguage;
/**
* Controller for language addition forms.
*/
class LanguageAddForm extends LanguageFormBase {
/**
* {@inheritdoc}
*/
public function getFormId() {
// @todo Remove in favour of base method.
return 'language_admin_add_form';
}
/**
* {@inheritdoc}
*/
public function form(array $form, FormStateInterface $form_state) {
$form['#title'] = $this->t('Add language');
$predefined_languages = $this->languageManager->getStandardLanguageListWithoutConfigured();
$predefined_languages['custom'] = $this->t('Custom language...');
$predefined_default = $form_state->getValue('predefined_langcode', key($predefined_languages));
$form['predefined_langcode'] = [
'#type' => 'select',
'#title' => $this->t('Language name'),
'#default_value' => $predefined_default,
'#options' => $predefined_languages,
];
$form['predefined_submit'] = [
'#type' => 'submit',
'#value' => $this->t('Add language'),
'#name' => 'add_language',
'#limit_validation_errors' => [['predefined_langcode'], ['predefined_submit']],
'#states' => [
'invisible' => [
'select#edit-predefined-langcode' => ['value' => 'custom'],
],
],
'#validate' => ['::validatePredefined'],
'#submit' => ['::submitForm', '::save'],
'#button_type' => 'primary',
];
$custom_language_states_conditions = [
'select#edit-predefined-langcode' => ['value' => 'custom'],
];
$form['custom_language'] = [
'#type' => 'container',
'#states' => [
'visible' => $custom_language_states_conditions,
],
];
$this->commonForm($form['custom_language']);
$form['custom_language']['langcode']['#states'] = [
'required' => $custom_language_states_conditions,
];
$form['custom_language']['label']['#states'] = [
'required' => $custom_language_states_conditions,
];
$form['custom_language']['submit'] = [
'#type' => 'submit',
'#value' => $this->t('Add custom language'),
'#name' => 'add_custom_language',
'#validate' => ['::validateCustom'],
'#submit' => ['::submitForm', '::save'],
];
return $form;
}
/**
* {@inheritdoc}
*/
public function save(array $form, FormStateInterface $form_state) {
parent::save($form, $form_state);
$t_args = ['%language' => $this->entity->label(), '%langcode' => $this->entity->id()];
$this->logger('language')->notice('The %language (%langcode) language has been created.', $t_args);
drupal_set_message($this->t('The language %language has been created and can now be used.', $t_args));
if ($this->moduleHandler->moduleExists('block')) {
// Tell the user they have the option to add a language switcher block
// to their theme so they can switch between the languages.
drupal_set_message($this->t('Use one of the language switcher blocks to allow site visitors to switch between languages. You can enable these blocks on the <a href=":block-admin">block administration page</a>.', [':block-admin' => $this->url('block.admin_display')]));
}
$form_state->setRedirectUrl($this->entity->urlInfo('collection'));
}
/**
* {@inheritdoc}
*/
public function actions(array $form, FormStateInterface $form_state) {
// No actions needed.
return [];
}
/**
* Validates the language addition form on custom language button.
*/
public function validateCustom(array $form, FormStateInterface $form_state) {
if ($form_state->getValue('predefined_langcode') == 'custom') {
$langcode = $form_state->getValue('langcode');
// Reuse the editing form validation routine if we add a custom language.
$this->validateCommon($form['custom_language'], $form_state);
if ($language = $this->languageManager->getLanguage($langcode)) {
$form_state->setErrorByName('langcode', $this->t('The language %language (%langcode) already exists.', ['%language' => $language->getName(), '%langcode' => $langcode]));
}
}
else {
$form_state->setErrorByName('predefined_langcode', $this->t('Use the <em>Add language</em> button to save a predefined language.'));
}
}
/**
* Element specific validator for the Add language button.
*/
public function validatePredefined($form, FormStateInterface $form_state) {
$langcode = $form_state->getValue('predefined_langcode');
if ($langcode == 'custom') {
$form_state->setErrorByName('predefined_langcode', $this->t('Fill in the language details and save the language with <em>Add custom language</em>.'));
}
else {
if ($language = $this->languageManager->getLanguage($langcode)) {
$form_state->setErrorByName('predefined_langcode', $this->t('The language %language (%langcode) already exists.', ['%language' => $language->getName(), '%langcode' => $langcode]));
}
}
}
/**
* {@inheritdoc}
*/
protected function copyFormValuesToEntity(EntityInterface $entity, array $form, FormStateInterface $form_state) {
$langcode = $form_state->getValue('predefined_langcode');
if ($langcode == 'custom') {
$langcode = $form_state->getValue('langcode');
$label = $form_state->getValue('label');
$direction = $form_state->getValue('direction');
}
else {
$standard_languages = LanguageManager::getStandardLanguageList();
$label = $standard_languages[$langcode][0];
$direction = isset($standard_languages[$langcode][2]) ? $standard_languages[$langcode][2] : ConfigurableLanguage::DIRECTION_LTR;
}
$entity->set('id', $langcode);
$entity->set('label', $label);
$entity->set('direction', $direction);
// There is no weight on the edit form. Fetch all configurable languages
// ordered by weight and set the new language to be placed after them.
$languages = \Drupal::languageManager()->getLanguages(ConfigurableLanguage::STATE_CONFIGURABLE);
$last_language = end($languages);
$entity->setWeight($last_language->getWeight() + 1);
}
}