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[yaffs-website] / web / core / modules / views / src / Plugin / views / filter / LatestRevision.php

diff --git a/web/core/modules/views/src/Plugin/views/filter/LatestRevision.php b/web/core/modules/views/src/Plugin/views/filter/LatestRevision.php
new file mode 100644 (file)
index 0000000..7930a7f
--- /dev/null
+++ b/web/core/modules/views/src/Plugin/views/filter/LatestRevision.php
@@ -0,0 +1,113 @@
+<?php
+
+namespace Drupal\views\Plugin\views\filter;
+
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\views\Plugin\ViewsHandlerManager;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Filter to show only the latest revision of an entity.
+ *
+ * @ingroup views_filter_handlers
+ *
+ * @ViewsFilter("latest_revision")
+ */
+class LatestRevision extends FilterPluginBase implements ContainerFactoryPluginInterface {
+
+  /**
+   * Entity Type Manager service.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   */
+  protected $entityTypeManager;
+
+  /**
+   * Views Handler Plugin Manager.
+   *
+   * @var \Drupal\views\Plugin\ViewsHandlerManager
+   */
+  protected $joinHandler;
+
+  /**
+   * Constructs a new LatestRevision.
+   *
+   * @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\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+   *   Entity Type Manager Service.
+   * @param \Drupal\views\Plugin\ViewsHandlerManager $join_handler
+   *   Views Handler Plugin Manager.
+   */
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeManagerInterface $entity_type_manager, ViewsHandlerManager $join_handler) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
+
+    $this->entityTypeManager = $entity_type_manager;
+    $this->joinHandler = $join_handler;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $configuration, $plugin_id, $plugin_definition,
+      $container->get('entity_type.manager'),
+      $container->get('plugin.manager.views.join')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function adminSummary() {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function operatorForm(&$form, FormStateInterface $form_state) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function canExpose() {
+    return FALSE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function query() {
+    /** @var \Drupal\views\Plugin\views\query\Sql $query */
+    $query = $this->query;
+    $query_base_table = $this->relationship ?: $this->view->storage->get('base_table');
+
+    $entity_type = $this->entityTypeManager->getDefinition($this->getEntityType());
+    $keys = $entity_type->getKeys();
+
+    $definition = [
+      'table' => $query_base_table,
+      'type' => 'LEFT',
+      'field' => $keys['id'],
+      'left_table' => $query_base_table,
+      'left_field' => $keys['id'],
+      'extra' => [
+        ['left_field' => $keys['revision'], 'field' => $keys['revision'], 'operator' => '>'],
+      ],
+    ];
+
+    $join = $this->joinHandler->createInstance('standard', $definition);
+
+    $join_table_alias = $query->addTable($query_base_table, $this->relationship, $join);
+    $query->addWhere($this->options['group'], "$join_table_alias.{$keys['id']}", NULL, 'IS NULL');
+  }
+
+}