DeepSeek V4 Flash (free)

<?php

namespace Drupal\current_date\Plugin\Block;

use Drupal\Core\Block\Attribute\Block;
use Drupal\Core\Block\BlockBase;
use Drupal\Core\Datetime\DateFormatterInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Symfony\Component\DependencyInjection\ContainerInterface;

#[Block(
  id: "current_date",
  admin_label: new TranslatableMarkup("Current date"),
  category: new TranslatableMarkup("Custom")
)]
class CurrentDateBlock extends BlockBase implements ContainerFactoryPluginInterface {

  public function __construct(
    array $configuration,
    $plugin_id,
    $plugin_definition,
    protected DateFormatterInterface $dateFormatter,
  ) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
  }

  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition): static {
    return new static(
      $configuration,
      $plugin_id,
      $plugin_definition,
      $container->get('date.formatter'),
    );
  }

  public function defaultConfiguration(): array {
    return [
      'date_format' => 'Y-m-d',
    ];
  }

  public function blockForm($form, FormStateInterface $form_state): array {
    $form['date_format'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Date format'),
      '#description' => $this->t('A PHP date format string as used by <a href=":url">date()</a>.', [
        ':url' => 'https://www.php.net/manual/en/datetime.format.php',
      ]),
      '#default_value' => $this->configuration['date_format'],
    ];
    return $form;
  }

  public function blockSubmit($form, FormStateInterface $form_state): void {
    $this->configuration['date_format'] = $form_state->getValue('date_format');
  }

  public function build(): array {
    $date = $this->dateFormatter->format(time(), 'custom', $this->configuration['date_format']);
    return [
      '#markup' => '<div class="current-date">' . $this->t('Today is @date', ['@date' => $date]) . '</div>',
    ];
  }

}