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<?php
namespace Drupal\language\Form;
use Drupal\Core\Form\ConfigFormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Language\LanguageInterface;
use Drupal\Core\Language\LanguageManagerInterface;
use Drupal\Core\Config\ConfigFactoryInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationUrl;
/**
* Configure the URL language negotiation method for this site.
*/
class NegotiationUrlForm extends ConfigFormBase {
/**
* The language manager.
*
* @var \Drupal\Core\Language\LanguageManagerInterface
*/
protected $languageManager;
/**
* Constructs a new NegotiationUrlForm object.
*
* @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
* The factory for configuration objects.
* @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
* The language manager.
*/
public function __construct(ConfigFactoryInterface $config_factory, LanguageManagerInterface $language_manager) {
parent::__construct($config_factory);
$this->languageManager = $language_manager;
}
/**
* {@inheritdoc}
*/
public static function create(ContainerInterface $container) {
return new static(
$container->get('config.factory'),
$container->get('language_manager')
);
}
/**
* {@inheritdoc}
*/
public function getFormId() {
return 'language_negotiation_configure_url_form';
}
/**
* {@inheritdoc}
*/
protected function getEditableConfigNames() {
return ['language.negotiation'];
}
/**
* {@inheritdoc}
*/
public function buildForm(array $form, FormStateInterface $form_state) {
global $base_url;
$config = $this->config('language.negotiation');
$form['language_negotiation_url_part'] = [
'#title' => $this->t('Part of the URL that determines language'),
'#type' => 'radios',
'#options' => [
LanguageNegotiationUrl::CONFIG_PATH_PREFIX => $this->t('Path prefix'),
LanguageNegotiationUrl::CONFIG_DOMAIN => $this->t('Domain'),
],
'#default_value' => $config->get('url.source'),
];
$form['prefix'] = [
'#type' => 'details',
'#tree' => TRUE,
'#title' => $this->t('Path prefix configuration'),
'#open' => TRUE,
'#description' => $this->t('Language codes or other custom text to use as a path prefix for URL language detection. For the selected fallback language, this value may be left blank. <strong>Modifying this value may break existing URLs. Use with caution in a production environment.</strong> Example: Specifying "deutsch" as the path prefix code for German results in URLs like "example.com/deutsch/contact".'),
'#states' => [
'visible' => [
':input[name="language_negotiation_url_part"]' => [
'value' => (string) LanguageNegotiationUrl::CONFIG_PATH_PREFIX,
],
],
],
];
$form['domain'] = [
'#type' => 'details',
'#tree' => TRUE,
'#title' => $this->t('Domain configuration'),
'#open' => TRUE,
'#description' => $this->t('The domain names to use for these languages. <strong>Modifying this value may break existing URLs. Use with caution in a production environment.</strong> Example: Specifying "de.example.com" as language domain for German will result in a URL like "http://de.example.com/contact".'),
'#states' => [
'visible' => [
':input[name="language_negotiation_url_part"]' => [
'value' => (string) LanguageNegotiationUrl::CONFIG_DOMAIN,
],
],
],
];
$languages = $this->languageManager->getLanguages();
$prefixes = $config->get('url.prefixes');
$domains = $config->get('url.domains');
foreach ($languages as $langcode => $language) {
$t_args = ['%language' => $language->getName(), '%langcode' => $language->getId()];
$form['prefix'][$langcode] = [
'#type' => 'textfield',
'#title' => $language->isDefault() ? $this->t('%language (%langcode) path prefix (Default language)', $t_args) : $this->t('%language (%langcode) path prefix', $t_args),
'#maxlength' => 64,
'#default_value' => isset($prefixes[$langcode]) ? $prefixes[$langcode] : '',
'#field_prefix' => $base_url . '/',
];
$form['domain'][$langcode] = [
'#type' => 'textfield',
'#title' => $this->t('%language (%langcode) domain', ['%language' => $language->getName(), '%langcode' => $language->getId()]),
'#maxlength' => 128,
'#default_value' => isset($domains[$langcode]) ? $domains[$langcode] : '',
];
}
$form_state->setRedirect('language.negotiation');
return parent::buildForm($form, $form_state);
}
/**
* {@inheritdoc}
*/
public function validateForm(array &$form, FormStateInterface $form_state) {
$languages = $this->languageManager->getLanguages();
// Count repeated values for uniqueness check.
$count = array_count_values($form_state->getValue('prefix'));
$default_langcode = $this->config('language.negotiation')->get('selected_langcode');
if ($default_langcode == LanguageInterface::LANGCODE_SITE_DEFAULT) {
$default_langcode = $this->languageManager->getDefaultLanguage()->getId();
}
foreach ($languages as $langcode => $language) {
$value = $form_state->getValue(['prefix', $langcode]);
if ($value === '') {
if (!($default_langcode == $langcode) && $form_state->getValue('language_negotiation_url_part') == LanguageNegotiationUrl::CONFIG_PATH_PREFIX) {
// Throw a form error if the prefix is blank for a non-default language,
// although it is required for selected negotiation type.
$form_state->setErrorByName("prefix][$langcode", $this->t('The prefix may only be left blank for the <a href=":url">selected detection fallback language.</a>', [
':url' => $this->getUrlGenerator()->generate('language.negotiation_selected'),
]));
}
}
elseif (strpos($value, '/') !== FALSE) {
// Throw a form error if the string contains a slash,
// which would not work.
$form_state->setErrorByName("prefix][$langcode", $this->t('The prefix may not contain a slash.'));
}
elseif (isset($count[$value]) && $count[$value] > 1) {
// Throw a form error if there are two languages with the same
// domain/prefix.
$form_state->setErrorByName("prefix][$langcode", $this->t('The prefix for %language, %value, is not unique.', ['%language' => $language->getName(), '%value' => $value]));
}
}
// Count repeated values for uniqueness check.
$count = array_count_values($form_state->getValue('domain'));
foreach ($languages as $langcode => $language) {
$value = $form_state->getValue(['domain', $langcode]);
if ($value === '') {
if ($form_state->getValue('language_negotiation_url_part') == LanguageNegotiationUrl::CONFIG_DOMAIN) {
// Throw a form error if the domain is blank for a non-default language,
// although it is required for selected negotiation type.
$form_state->setErrorByName("domain][$langcode", $this->t('The domain may not be left blank for %language.', ['%language' => $language->getName()]));
}
}
elseif (isset($count[$value]) && $count[$value] > 1) {
// Throw a form error if there are two languages with the same
// domain/domain.
$form_state->setErrorByName("domain][$langcode", $this->t('The domain for %language, %value, is not unique.', ['%language' => $language->getName(), '%value' => $value]));
}
}
// Domain names should not contain protocol and/or ports.
foreach ($languages as $langcode => $language) {
$value = $form_state->getValue(['domain', $langcode]);
if (!empty($value)) {
// Ensure we have exactly one protocol when checking the hostname.
$host = 'http://' . str_replace(['http://', 'https://'], '', $value);
if (parse_url($host, PHP_URL_HOST) != $value) {
$form_state->setErrorByName("domain][$langcode", $this->t('The domain for %language may only contain the domain name, not a trailing slash, protocol and/or port.', ['%language' => $language->getName()]));
}
}
}
parent::validateForm($form, $form_state);
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
// Save selected format (prefix or domain).
$this->config('language.negotiation')
->set('url.source', $form_state->getValue('language_negotiation_url_part'))
// Save new domain and prefix values.
->set('url.prefixes', $form_state->getValue('prefix'))
->set('url.domains', $form_state->getValue('domain'))
->save();
parent::submitForm($form, $form_state);
}
}