HistoryUserTimestamp.php

<?php

namespace Drupal\history\Plugin\views\filter;

use Drupal\Component\Datetime\TimeInterface;
use Drupal\Core\Cache\UncacheableDependencyTrait;
use Drupal\Core\Form\FormStateInterface;
use Drupal\views\Attribute\ViewsFilter;
use Drupal\views\Plugin\views\filter\FilterPluginBase;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Filter for new content.
 *
 * The handler is named history_user, because of compatibility reasons, the
 * table is history.
 *
 * @ingroup views_filter_handlers
 */
class HistoryUserTimestamp extends FilterPluginBase {
  use UncacheableDependencyTrait;
  
  /**
   * {@inheritdoc}
   */
  // phpcs:ignore Drupal.NamingConventions.ValidVariableName.LowerCamelName, Drupal.Commenting.VariableComment.Missing
  public $no_operator = TRUE;
  
  /**
   * Constructs a HistoryUserTimestamp object.
   *
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin ID for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\Component\Datetime\TimeInterface $time
   *   The time service.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, protected TimeInterface $time) {
    parent::__construct($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('datetime.time'));
  }
  
  /**
   * {@inheritdoc}
   */
  public function usesGroupBy() {
    return FALSE;
  }
  
  /**
   * {@inheritdoc}
   */
  public function buildExposeForm(&$form, FormStateInterface $form_state) {
    parent::buildExposeForm($form, $form_state);
    // @todo There are better ways of excluding required and multiple (object flags)
    unset($form['expose']['required']);
    unset($form['expose']['multiple']);
    unset($form['expose']['remember']);
  }
  
  /**
   * {@inheritdoc}
   */
  protected function valueForm(&$form, FormStateInterface $form_state) {
    // Only present a checkbox for the exposed filter itself. There's no way
    // to tell the difference between not checked and the default value, so
    // specifying the default value via the views UI is meaningless.
    if ($form_state->get('exposed')) {
      if (isset($this->options['expose']['label'])) {
        $label = $this->options['expose']['label'];
      }
      else {
        $label = $this->t('Has new content');
      }
      $form['value'] = [
        '#type' => 'checkbox',
        '#title' => $label,
        '#default_value' => $this->value,
      ];
    }
  }
  
  /**
   * {@inheritdoc}
   */
  public function query() {
    // This can only work if we're authenticated in.
    if (!\Drupal::currentUser()->isAuthenticated()) {
      return;
    }
    // Don't filter if we're exposed and the checkbox isn't selected.
    if (!empty($this->options['exposed']) && empty($this->value)) {
      return;
    }
    // Hey, Drupal kills old history, so nodes that haven't been updated
    // since HISTORY_READ_LIMIT are outta here!
    $limit = $this->time
      ->getRequestTime() - HISTORY_READ_LIMIT;
    $this->ensureMyTable();
    $field = "{$this->tableAlias}.{$this->realField}";
    $node = $this->query
      ->ensureTable('node_field_data', $this->relationship);
    $clause = '';
    $clause2 = '';
    if ($alias = $this->query
      ->ensureTable('comment_entity_statistics', $this->relationship)) {
      $clause = "OR {$alias}.last_comment_timestamp > (***CURRENT_TIME*** - {$limit})";
      $clause2 = "OR {$field} < {$alias}.last_comment_timestamp";
    }
    // NULL means a history record doesn't exist. That's clearly new content.
    // Unless it's very very old content. Everything in the query is already
    // type safe cause none of it is coming from outside here.
    $this->query
      ->addWhereExpression($this->options['group'], "({$field} IS NULL AND ({$node}.changed > (***CURRENT_TIME*** - {$limit}) {$clause})) OR {$field} < {$node}.changed {$clause2}");
  }
  
  /**
   * {@inheritdoc}
   */
  public function adminSummary() {
    if (!empty($this->options['exposed'])) {
      return $this->t('exposed');
    }
  }

}