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<?php
namespace Drupal\system\Form;
use Drupal\Core\Config\Entity\ConfigEntityStorageInterface;
use Drupal\Core\Datetime\DateFormatterInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Language\LanguageInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Drupal\Core\Datetime\DrupalDateTime;
use Drupal\Core\Entity\EntityForm;
/**
* Provides a base form for date formats.
*/
abstract class DateFormatFormBase extends EntityForm {
/**
* The date formatter service.
*
* @var \Drupal\Core\Datetime\DateFormatterInterface
*/
protected $dateFormatter;
/**
* The date format storage.
*
* @var \Drupal\Core\Config\Entity\ConfigEntityStorageInterface
*/
protected $dateFormatStorage;
/**
* Constructs a new date format form.
*
* @param \Drupal\Core\Datetime\DateFormatterInterface $date_formatter
* The date service.
* @param \Drupal\Core\Config\Entity\ConfigEntityStorageInterface $date_format_storage
* The date format storage.
*/
public function __construct(DateFormatterInterface $date_formatter, ConfigEntityStorageInterface $date_format_storage) {
$date = new DrupalDateTime();
$this->dateFormatter = $date_formatter;
$this->dateFormatStorage = $date_format_storage;
}
/**
* {@inheritdoc}
*/
public static function create(ContainerInterface $container) {
return new static(
$container->get('date.formatter'),
$container->get('entity.manager')->getStorage('date_format')
);
}
/**
* Checks for an existing date format.
*
* @param string|int $entity_id
* The entity ID.
* @param array $element
* The form element.
*
* @return bool
* TRUE if this format already exists, FALSE otherwise.
*/
public function exists($entity_id, array $element) {
return (bool) $this->dateFormatStorage
->getQuery()
->condition('id', $element['#field_prefix'] . $entity_id)
->execute();
}
/**
* {@inheritdoc}
*/
public function form(array $form, FormStateInterface $form_state) {
$form['label'] = [
'#type' => 'textfield',
'#title' => 'Name',
'#maxlength' => 100,
'#description' => t('Name of the date format'),
'#default_value' => $this->entity->label(),
];
$form['id'] = [
'#type' => 'machine_name',
'#description' => t('A unique machine-readable name. Can only contain lowercase letters, numbers, and underscores.'),
'#disabled' => !$this->entity->isNew(),
'#default_value' => $this->entity->id(),
'#machine_name' => [
'exists' => [$this, 'exists'],
'replace_pattern' => '([^a-z0-9_]+)|(^custom$)',
'error' => $this->t('The machine-readable name must be unique, and can only contain lowercase letters, numbers, and underscores. Additionally, it can not be the reserved word "custom".'),
],
];
$form['date_format_pattern'] = [
'#type' => 'textfield',
'#title' => t('Format string'),
'#maxlength' => 100,
'#description' => $this->t('A user-defined date format. See the <a href="http://php.net/manual/function.date.php">PHP manual</a> for available options.'),
'#required' => TRUE,
'#attributes' => [
'data-drupal-date-formatter' => 'source',
],
'#field_suffix' => ' <small class="js-hide" data-drupal-date-formatter="preview">' . $this->t('Displayed as %date_format', ['%date_format' => '']) . '</small>',
];
$form['langcode'] = [
'#type' => 'language_select',
'#title' => t('Language'),
'#languages' => LanguageInterface::STATE_ALL,
'#default_value' => $this->entity->language()->getId(),
];
$form['#attached']['drupalSettings']['dateFormats'] = $this->dateFormatter->getSampleDateFormats();
$form['#attached']['library'][] = 'system/drupal.system.date';
return parent::form($form, $form_state);
}
/**
* {@inheritdoc}
*/
public function validateForm(array &$form, FormStateInterface $form_state) {
parent::validateForm($form, $form_state);
// The machine name field should already check to see if the requested
// machine name is available.
$pattern = trim($form_state->getValue('date_format_pattern'));
foreach ($this->dateFormatStorage->loadMultiple() as $format) {
if ($format->getPattern() == $pattern && ($format->id() == $this->entity->id())) {
drupal_set_message(t('The existing format/name combination has not been altered.'));
continue;
}
}
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
$form_state->setValue('pattern', trim($form_state->getValue('date_format_pattern')));
parent::submitForm($form, $form_state);
}
/**
* {@inheritdoc}
*/
public function save(array $form, FormStateInterface $form_state) {
$status = $this->entity->save();
if ($status == SAVED_UPDATED) {
drupal_set_message(t('Custom date format updated.'));
}
else {
drupal_set_message(t('Custom date format added.'));
}
$form_state->setRedirectUrl($this->entity->urlInfo('collection'));
}
}