created home node and some computed field

web/modules/custom/materio_home/src/Controller/HomeController.php

@@ -28,6 +28,15 @@ class HomeController extends ControllerBase {
 
     $contents = array("#theme"=>'materio_home');
 
+    // presentation
+    $query = \Drupal::entityQuery('node')
+      ->condition('status', 1)
+      ->condition('nid', 19990);
+    // TODO: présentation nid should be a setting
+
+    $pres_nid = $query->execute();
+    $contents["#frontpage_node"] = entity_load('node', array_pop($pres_nid));
+
     return $contents;
   }
 

web/modules/custom/materio_home/src/Plugin/Field/FieldType/ComputedMaterialsReferences.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace Drupal\materio_home\Plugin\Field\FieldType;
+
+use Drupal\Core\Entity\FieldableEntityInterface;
+use Drupal\Core\Field\EntityReferenceFieldItemList;
+use Drupal\Core\Field\EntityReferenceFieldItemListInterface;
+use Drupal\Core\Field\FieldItemList;
+use Drupal\Core\TypedData\TypedDataInterface;
+use Drupal\Core\Field\BaseFieldDefinition;
+use Drupal\Core\TypedData\ComputedItemListTrait;
+
+// https://www.drupal.org/node/2112677
+// https://www.cornel.co/article/entity-reference-computed-field-example-drupal
+// https://www.caxy.com/blog/drupal-custom-form-and-computed-fields
+
+class ComputedMaterialsReferences extends EntityReferenceFieldItemList
+{
+  use ComputedItemListTrait;
+
+  /**
+   * The entity type manager.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   */
+  protected $entityTypeManager;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct(BaseFieldDefinition $definition, $name, TypedDataInterface $parent) {
+    parent::__construct($definition, $name, $parent);
+    $this->entityTypeManager = \Drupal::entityTypeManager();
+  }
+
+  /**
+   * Compute the values.
+   */
+  protected function computeValue() {
+    $query = \Drupal::entityQuery('node')
+        ->condition('status', 1)
+        ->condition('type', 'materiau')
+        ->sort('created', 'DESC')
+        ->range(0,200);
+    $results = $query->execute();
+    $nids = array_rand($results, 20);
+    $nodes = entity_load_multiple('node', $nids);
+    // \Drupal::logger('materio_home')->notice(print_r($nodes, true));
+    $key = 0;
+    foreach ($nodes as $nid => $node) {
+      // \Drupal::logger('materio_home')->notice($nid);
+      $this->list[$key] = $this->createItem($key, $node->id());
+      $key++;
+    }
+  }
+
+}

web/modules/custom/materio_home/src/Plugin/Field/FieldType/ComputedShowroomsReferences.php

@@ -0,0 +1,53 @@
+<?php
+namespace Drupal\materio_home\Plugin\Field\FieldType;
+
+use Drupal\Core\Entity\FieldableEntityInterface;
+use Drupal\Core\Field\EntityReferenceFieldItemList;
+use Drupal\Core\Field\EntityReferenceFieldItemListInterface;
+use Drupal\Core\Field\FieldItemList;
+use Drupal\Core\TypedData\TypedDataInterface;
+use Drupal\Core\Field\BaseFieldDefinition;
+use Drupal\Core\TypedData\ComputedItemListTrait;
+
+// https://www.drupal.org/node/2112677
+// https://www.cornel.co/article/entity-reference-computed-field-example-drupal
+// https://www.caxy.com/blog/drupal-custom-form-and-computed-fields
+
+class ComputedShowroomsReferences extends EntityReferenceFieldItemList
+{
+  use ComputedItemListTrait;
+  /**
+   * The entity type manager.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   */
+  protected $entityTypeManager;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct(BaseFieldDefinition $definition, $name, TypedDataInterface $parent) {
+    parent::__construct($definition, $name, $parent);
+    $this->entityTypeManager = \Drupal::entityTypeManager();
+  }
+
+  /**
+   * Compute the values.
+   */
+  protected function computeValue() {
+    $query = \Drupal::entityQuery('taxonomy_term')
+        ->condition('status', 1)
+        ->condition('vid', 'showroom');
+    $tids = $query->execute();
+    shuffle($tids);
+    $terms = entity_load_multiple('taxonomy_term', $tids);
+    // \Drupal::logger('materio_home')->notice(print_r($nodes, true));
+    $key = 0;
+    foreach ($terms as $tid => $term) {
+      // \Drupal::logger('materio_home')->notice($nid);
+      $this->list[$key] = $this->createItem($key, $term->id());
+      $key++;
+    }
+  }
+
+}