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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\Core\Url;
use Drupal\language\Entity\ConfigurableLanguage;
class LanguageAddForm extends LanguageFormBase {
public function getFormId() {
return 'language_admin_add_form';
}
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;
}
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);
$this
->messenger()
->addStatus($this
->t('The language %language has been created and can now be used.', $t_args));
if ($this->moduleHandler
->moduleExists('block')) {
$this
->messenger()
->addStatus($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' => Url::fromRoute('block.admin_display')
->toString(),
]));
}
$form_state
->setRedirectUrl($this->entity
->toUrl('collection'));
}
public function actions(array $form, FormStateInterface $form_state) {
return [];
}
public function validateCustom(array $form, FormStateInterface $form_state) {
if ($form_state
->getValue('predefined_langcode') == 'custom') {
$langcode = $form_state
->getValue('langcode');
$this
->validateCommon($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', $this
->t('Use the <em>Add language</em> button to save a predefined language.'));
}
}
public function validatePredefined($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,
]));
}
}
}
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);
$languages = \Drupal::languageManager()
->getLanguages(ConfigurableLanguage::STATE_CONFIGURABLE);
$last_language = end($languages);
$entity
->setWeight($last_language
->getWeight() + 1);
}
}