MiMo V2.5 (free)

<?php

namespace Drupal\current_date\Plugin\Block;

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

/**
 * Provides a block that displays the current date.
 */
#[Block(
  id: "current_date_block",
  admin_label: new TranslatableMarkup("Current date"),
)]
class CurrentDateBlock extends BlockBase implements ContainerFactoryPluginInterface {

  /**
   * Constructs a CurrentDateBlock instance.
   */
  public function __construct(
    array $configuration,
    $plugin_id,
    $plugin_definition,
    protected DateFormatterInterface $dateFormatter,
    protected EntityTypeManagerInterface $entityTypeManager,
  ) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static(
      $configuration,
      $plugin_id,
      $plugin_definition,
      $container->get('date.formatter'),
      $container->get('entity_type.manager'),
    );
  }

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration() {
    return [
      'date_format' => 'long',
      'label_display' => '',
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function blockForm($form, FormStateInterface $form_state) {
    $form['date_format'] = [
      '#type' => 'select',
      '#title' => $this->t('Date format'),
      '#description' => $this->t('Select the format in which to display the date.'),
      '#default_value' => $this->configuration['date_format'],
      '#options' => $this->getDateFormatOptions(),
    ];
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function blockSubmit($form, FormStateInterface $form_state) {
    $this->configuration['date_format'] = $form_state->getValue('date_format');
  }

  /**
   * {@inheritdoc}
   */
  public function build() {
    $formatted_date = $this->dateFormatter->format(
      time(),
      $this->configuration['date_format'],
    );

    return [
      '#markup' => $formatted_date,
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function getCacheContexts() {
    return Cache::mergeContexts(
      parent::getCacheContexts(),
      ['timezone', 'languages:language_interface'],
    );
  }

  /**
   * {@inheritdoc}
   */
  public function getCacheMaxAge() {
    return 0;
  }

  /**
   * Returns available date format options.
   *
   * @return array
   *   An associative array of date format ID => label.
   */
  protected function getDateFormatOptions() {
    $formats = $this->entityTypeManager->getStorage('date_format')->loadMultiple();
    $options = [];
    foreach ($formats as $id => $format) {
      $options[$id] = $format->label();
    }
    return $options;
  }

}