IsIslandora views filter and context condition use Islandora Utils.

islandora.views.inc

@@ -37,4 +37,16 @@ function islandora_views_data_alter(&$data) {
       'id' => 'islandora_node_has_media_use',
     ],
   ];
+
+  // Add Is Islandora filter.
+  $data['node_field_data']['islandora_node_is_islandora'] = [
+    'title' => t('Node is Islandora'),
+    'group' => t('Content'),
+    'filter' => [
+      'title' => t('Node is Islandora'),
+      'help' => t('Node has a content type that possesses the mandatory Islandora fields.'),
+      'field' => 'nid',
+      'id' => 'islandora_node_is_islandora',
+    ],
+  ];
 }

src/Plugin/Condition/NodeIsIslandoraObject.php

@@ -5,28 +5,54 @@
 use Drupal\Core\Condition\ConditionPluginBase;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
+use Drupal\Islandora\IslandoraUtils;
 
 /**
  * Checks whether node has fields that qualify it as an "Islandora" node.
  *
  * @Condition(
  *   id = "node_is_islandora_object",
- *   label = @Translation("Node is an Islandora object"),
+ *   label = @Translation("Node is an Islandora node"),
  *   context_definitions = {
  *     "node" = @ContextDefinition("entity:node", required = TRUE , label = @Translation("node"))
  *   }
  * )
  */
 class NodeIsIslandoraObject extends ConditionPluginBase implements ContainerFactoryPluginInterface {
 
+  /**
+   * Islandora Utils.
+   *
+   * @var \Drupal\islandora\IslandoraUtils
+   */
+  protected $utils;
+
+  /**
+   * Constructs a Node is Islandora Condition plugin.
+   *
+   * @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\islandora\IslandoraUtils $islandora_utils
+   *   Islandora utilities.
+   */
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, IslandoraUtils $islandora_utils) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
+    $this->utils = $islandora_utils;
+  }
+
   /**
    * {@inheritdoc}
    */
   public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
     return new static(
       $configuration,
       $plugin_id,
-      $plugin_definition
+      $plugin_definition,
+      $container->get('islandora.utils')
     );
   }
 
@@ -38,8 +64,8 @@ public function evaluate() {
     if (!$node) {
       return FALSE;
     }
-    // Islandora objects have these two fields.
-    if ($node->hasField('field_model') && $node->hasField('field_member_of')) {
+    // Determine if node is Islandora.
+    if ($this->utils->isIslandoraType('node', $node->bundle())) {
       return TRUE;
     }
   }
@@ -49,10 +75,10 @@ public function evaluate() {
    */
   public function summary() {
     if (!empty($this->configuration['negate'])) {
-      return $this->t('The node is not an Islandora object.');
+      return $this->t('The node is not an Islandora node.');
     }
     else {
-      return $this->t('The node is an Islandora object.');
+      return $this->t('The node is an Islandora node.');
     }
   }
 

src/Plugin/views/filter/NodeIsIslandora.php

@@ -0,0 +1,144 @@
+<?php
+
+namespace Drupal\islandora\Plugin\views\filter;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\views\Plugin\views\filter\FilterPluginBase;
+use Drupal\views\Plugin\ViewsHandlerManager;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Drupal\islandora\IslandoraUtils;
+use Drupal\Core\Entity\EntityTypeBundleInfoInterface;
+
+/**
+ * Views Filter to show only Islandora nodes.
+ *
+ * @ingroup views_filter_handlers
+ *
+ * @ViewsFilter("islandora_node_is_islandora")
+ */
+class NodeIsIslandora extends FilterPluginBase implements ContainerFactoryPluginInterface {
+
+  /**
+   * Views Handler Plugin Manager.
+   *
+   * @var \Drupal\views\Plugin\ViewsHandlerManager
+   */
+  protected $joinHandler;
+
+  /**
+   * Islandora Utils.
+   *
+   * @var \Drupal\islandora\IslandoraUtils
+   */
+  protected $utils;
+
+  /**
+   * The entity type bundle info service.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeBundleInfoInterface
+   */
+  protected $entityTypeBundleInfo;
+
+  /**
+   * Constructs a Node is Islandora views filter plugin.
+   *
+   * @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\views\Plugin\ViewsHandlerManager $join_handler
+   *   Views Handler Plugin Manager.
+   * @param \Drupal\islandora\IslandoraUtils $islandora_utils
+   *   Islandora utilities.
+   * @param \Drupal\Core\Entity\EntityTypeBundleInfoInterface $entity_type_bundle_info
+   *   The entity type bundle service.
+   */
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, ViewsHandlerManager $join_handler, IslandoraUtils $islandora_utils, EntityTypeBundleInfoInterface $entity_type_bundle_info) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
+    $this->joinHandler = $join_handler;
+    $this->utils = $islandora_utils;
+    $this->entityTypeBundleInfo = $entity_type_bundle_info;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $configuration, $plugin_id, $plugin_definition,
+      $container->get('plugin.manager.views.join'),
+      $container->get('islandora.utils'),
+      $container->get('entity_type.bundle.info')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function defineOptions() {
+    return [
+      'negated' => ['default' => FALSE],
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
+    $types = [];
+    foreach ($this->entityTypeBundleInfo->getBundleInfo('node') as $bundle_id => $bundle) {
+      if ($this->utils->isIslandoraType('node', $bundle_id)) {
+        $types[] = "{$bundle['label']} ($bundle_id)";
+      }
+    }
+    $types_list = implode(', ', $types);
+    $form['info'] = [
+      '#type' => 'item',
+      '#title' => 'Information',
+      '#description' => t("Configured Islandora bundles: @types", ['@types' => $types_list]),
+    ];
+    $form['negated'] = [
+      '#type' => 'checkbox',
+      '#title' => 'Negated',
+      '#description' => $this->t("Return nodes that <em>don't</em> have islandora fields"),
+      '#default_value' => $this->options['negated'],
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function adminSummary() {
+    $operator = ($this->options['negated']) ? "is not" : "is";
+    return "Node {$operator} an islandora node";
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function query() {
+    $types = [];
+    foreach (array_keys($this->entityTypeBundleInfo->getBundleInfo('node')) as $bundle_id) {
+      if ($this->utils->isIslandoraType('node', $bundle_id)) {
+        $types[] = $bundle_id;
+      }
+    }
+    $condition = ($this->options['negated']) ? 'NOT IN' : 'IN';
+    $query_base_table = $this->relationship ?: $this->view->storage->get('base_table');
+
+    $definition = [
+      'table' => 'node',
+      'type' => 'LEFT',
+      'field' => 'nid',
+      'left_table' => $query_base_table,
+      'left_field' => 'nid',
+    ];
+    $join = $this->joinHandler->createInstance('standard', $definition);
+    $node_table_alias = $this->query->addTable('node', $this->relationship, $join);
+    $this->query->addWhere($this->options['group'], "$node_table_alias.type", $types, $condition);
+  }
+
+}