TaxonomyViewsHooks.php

<?php

namespace Drupal\taxonomy\Hook;

use Drupal\field\FieldStorageConfigInterface;
use Drupal\Core\Hook\Attribute\Hook;

/**
 * Hook implementations for taxonomy.
 */
class TaxonomyViewsHooks {
    
    /**
     * Implements hook_views_data_alter().
     */
    public function viewsDataAlter(&$data) {
        $data['node_field_data']['term_node_tid'] = [
            'title' => t('Taxonomy terms on node'),
            'help' => t('Relate nodes to taxonomy terms, specifying which vocabulary or vocabularies to use. This relationship will cause duplicated records if there are multiple terms.'),
            'relationship' => [
                'id' => 'node_term_data',
                'label' => t('term'),
                'base' => 'taxonomy_term_field_data',
            ],
            'field' => [
                'title' => t('All taxonomy terms'),
                'help' => t('Display all taxonomy terms associated with a node from specified vocabularies.'),
                'id' => 'taxonomy_index_tid',
                'no group by' => TRUE,
                'click sortable' => FALSE,
            ],
        ];
        $data['node_field_data']['term_node_tid_depth'] = [
            'help' => t('Display content if it has the selected taxonomy terms, or children of the selected terms. Due to additional complexity, this has fewer options than the versions without depth.'),
            'real field' => 'nid',
            'argument' => [
                'title' => t('Has taxonomy term ID (with depth)'),
                'id' => 'taxonomy_index_tid_depth',
                'accept depth modifier' => TRUE,
            ],
            'filter' => [
                'title' => t('Has taxonomy terms (with depth)'),
                'id' => 'taxonomy_index_tid_depth',
            ],
        ];
        $data['node_field_data']['term_node_tid_depth_modifier'] = [
            'title' => t('Has taxonomy term ID depth modifier'),
            'help' => t('Allows the "depth" for Taxonomy: Term ID (with depth) to be modified via an additional contextual filter value.'),
            'argument' => [
                'id' => 'taxonomy_index_tid_depth_modifier',
            ],
        ];
    }
    
    /**
     * Implements hook_field_views_data_alter().
     *
     * Views integration for entity reference fields which reference taxonomy terms.
     * Adds a term relationship to the default field data.
     *
     * @see views_field_default_views_data()
     */
    public function fieldViewsDataAlter(array &$data, FieldStorageConfigInterface $field_storage) {
        if ($field_storage->getType() == 'entity_reference' && $field_storage->getSetting('target_type') == 'taxonomy_term') {
            foreach ($data as $table_name => $table_data) {
                foreach ($table_data as $field_name => $field_data) {
                    if (isset($field_data['filter']) && $field_name != 'delta') {
                        $data[$table_name][$field_name]['filter']['id'] = 'taxonomy_index_tid';
                    }
                }
            }
        }
    }

}