EntityFieldDeriver.php

<?php

namespace Drupal\ctools_block\Plugin\Deriver;

use Drupal\Core\Plugin\Context\EntityContextDefinition;
use Drupal\ctools\Plugin\Deriver\EntityDeriverBase;

/**
 * Provides entity field block definitions for every field.
 */
class EntityFieldDeriver extends EntityDeriverBase {
    
    /**
     * {@inheritdoc}
     */
    public function getDerivativeDefinitions($base_plugin_definition) {
        $entity_type_labels = $this->entityTypeRepository
            ->getEntityTypeLabels();
        foreach ($this->entityFieldManager
            ->getFieldMap() as $entity_type_id => $entity_field_map) {
            // Some base fields have no storage.
            
            /** @var \Drupal\Core\Field\FieldDefinitionInterface[] $field_storage_definitions */
            $field_storage_definitions = array_merge($this->entityFieldManager
                ->getBaseFieldDefinitions($entity_type_id), $this->entityFieldManager
                ->getFieldStorageDefinitions($entity_type_id));
            foreach ($field_storage_definitions as $field_storage_definition) {
                $field_name = $field_storage_definition->getName();
                // The blocks are based on fields. However, we are looping through field
                // storages for which no fields may exist. If that is the case, skip
                // this field storage.
                if (!isset($entity_field_map[$field_name])) {
                    continue;
                }
                $field_info = $entity_field_map[$field_name];
                $derivative_id = $entity_type_id . ":" . $field_name;
                // Get the admin label for both base and configurable fields.
                if ($field_storage_definition->isBaseField()) {
                    $admin_label = $field_storage_definition->getLabel();
                }
                else {
                    // We take the field label used on the first bundle.
                    $first_bundle = reset($field_info['bundles']);
                    $bundle_field_definitions = $this->entityFieldManager
                        ->getFieldDefinitions($entity_type_id, $first_bundle);
                    // The field storage config may exist, but it's possible that no
                    // fields are actually using it. If that's the case, skip to the next
                    // field.
                    if (empty($bundle_field_definitions[$field_name])) {
                        continue;
                    }
                    $admin_label = $bundle_field_definitions[$field_name]->getLabel();
                }
                // Set plugin definition for derivative.
                $derivative = $base_plugin_definition;
                $derivative['category'] = $this->t('@entity', [
                    '@entity' => $entity_type_labels[$entity_type_id],
                ]);
                $derivative['admin_label'] = $admin_label;
                $derivative['context_definitions'] = [
                    'entity' => new EntityContextDefinition('entity:' . $entity_type_id, $entity_type_labels[$entity_type_id], TRUE),
                ];
                $this->derivatives[$derivative_id] = $derivative;
            }
        }
        return $this->derivatives;
    }

}