class FieldTestHooks

class FieldTestHooks {
    
    /**
     * Implements hook_entity_display_build_alter().
     */
    public function entityDisplayBuildAlter(&$output, $context) {
        $display_options = $context['display']->getComponent('test_field');
        if (isset($display_options['settings']['alter'])) {
            $output['test_field'][] = [
                '#markup' => 'field_test_entity_display_build_alter',
            ];
        }
        if (isset($output['test_field'])) {
            $output['test_field'][] = [
                '#markup' => 'entity language is ' . $context['entity']->language()
                    ->getId(),
            ];
        }
    }
    
    /**
     * Implements hook_field_widget_single_element_form_alter().
     */
    public function fieldWidgetSingleElementFormAlter(&$element, FormStateInterface $form_state, $context) {
        // Set a message if this is for the form displayed to set default value for
        // the field.
        if ($context['default']) {
            \Drupal::messenger()->addStatus('From hook_field_widget_single_element_form_alter(): Default form is true.');
        }
    }
    
    /**
     * Implements hook_field_widget_complete_form_alter().
     */
    public function fieldWidgetCompleteFormAlter(array &$field_widget_complete_form, FormStateInterface $form_state, array $context) {
        _field_test_alter_widget("hook_field_widget_complete_form_alter", $field_widget_complete_form, $form_state, $context);
    }
    
    /**
     * Implements hook_field_widget_complete_WIDGET_TYPE_form_alter().
     */
    public function fieldWidgetCompleteTestFieldWidgetMultipleFormAlter(array &$field_widget_complete_form, FormStateInterface $form_state, array $context) {
        _field_test_alter_widget("hook_field_widget_complete_WIDGET_TYPE_form_alter", $field_widget_complete_form, $form_state, $context);
    }
    
    /**
     * Implements hook_field_widget_complete_WIDGET_TYPE_form_alter().
     */
    public function fieldWidgetCompleteTestFieldWidgetMultipleSingleValueFormAlter(array &$field_widget_complete_form, FormStateInterface $form_state, array $context) {
        _field_test_alter_widget("hook_field_widget_complete_WIDGET_TYPE_form_alter", $field_widget_complete_form, $form_state, $context);
    }
    
    /**
     * Implements hook_query_TAG_alter() for tag 'efq_table_prefixing_test'.
     *
     * @see \Drupal\system\Tests\Entity\EntityFieldQueryTest::testTablePrefixing()
     */
    public function queryEfqTablePrefixingTestAlter(&$query) {
        // Add an additional join onto the entity base table. This will cause an
        // exception if the EFQ does not properly prefix the base table.
        $query->join('entity_test', 'et2', '[%alias].[id] = [entity_test].[id]');
    }
    
    /**
     * Implements hook_query_TAG_alter() for tag 'efq_metadata_test'.
     *
     * @see \Drupal\system\Tests\Entity\EntityQueryTest::testMetaData()
     */
    public function queryEfqMetadataTestAlter(&$query) {
        field_test_memorize('field_test_query_efq_metadata_test_alter', $query->getMetadata('foo'));
    }
    
    /**
     * Implements hook_entity_extra_field_info_alter().
     */
    public function entityExtraFieldInfoAlter(&$info) {
        // Remove all extra fields from the 'no_fields' content type;
        unset($info['node']['no_fields']);
    }
    
    /**
     * Implements hook_entity_bundle_field_info_alter().
     */
    public function entityBundleFieldInfoAlter(&$fields, EntityTypeInterface $entity_type, $bundle) {
        if (($field_name = \Drupal::state()->get('field_test_constraint', FALSE)) && $entity_type->id() == 'entity_test' && $bundle == 'entity_test' && !empty($fields[$field_name])) {
            // Set a property constraint using
            // \Drupal\Core\Field\FieldConfigInterface::setPropertyConstraints().
            $fields[$field_name]->setPropertyConstraints('value', [
                'TestField' => [
                    'value' => -2,
                    'message' => t('%name does not accept the value @value.', [
                        '%name' => $field_name,
                        '@value' => -2,
                    ]),
                ],
            ]);
            // Add a property constraint using
            // \Drupal\Core\Field\FieldConfigInterface::addPropertyConstraints().
            $fields[$field_name]->addPropertyConstraints('value', [
                'Range' => [
                    'min' => 0,
                    'max' => 32,
                ],
            ]);
        }
    }
    
    /**
     * Implements hook_field_ui_preconfigured_options_alter().
     */
    public function fieldUiPreconfiguredOptionsAlter(array &$options, $field_type) {
        if ($field_type === 'test_field_with_preconfigured_options') {
            $options['custom_options']['entity_view_display']['settings'] = [
                'test_formatter_setting_multiple' => 'altered dummy test string',
            ];
        }
    }
    
    /**
     * Implements hook_field_info_entity_type_ui_definitions_alter().
     */
    public function fieldInfoEntityTypeUiDefinitionsAlter(array &$ui_definitions, string $entity_type_id) {
        if ($entity_type_id === 'node') {
            $ui_definitions['boolean']['label'] = new TranslatableMarkup('Boolean (overridden by alter)');
        }
    }
    
    /**
     * Implements hook_entity_query_alter().
     *
     * @see Drupal\KernelTests\Core\Entity\EntityQueryTest::testAlterHook
     */
    public function entityQueryAlter(QueryInterface $query) : void {
        if ($query->hasTag('entity_query_alter_hook_test')) {
            $query->condition('id', '5', '<>');
        }
    }
    
    /**
     * Implements hook_entity_query_ENTITY_TYPE_alter() for 'entity_test_mulrev'.
     *
     * @see Drupal\KernelTests\Core\Entity\EntityQueryTest::testAlterHook
     */
    public function entityQueryEntityTestMulrevAlter(QueryInterface $query) : void {
        if ($query->hasTag('entity_query_entity_test_mulrev_alter_hook_test')) {
            $query->condition('id', '7', '<>');
        }
    }
    
    /**
     * Implements hook_entity_query_tag__TAG_alter() for 'entity_query_alter_tag_test'.
     *
     * @see Drupal\KernelTests\Core\Entity\EntityQueryTest::testAlterHook
     */
    public function entityQueryTagEntityQueryAlterTagTestAlter(QueryInterface $query) : void {
        $query->condition('id', '13', '<>');
    }
    
    /**
     * Implements hook_entity_query_tag__ENTITY_TYPE__TAG_alter().
     *
     * Entity type is 'entity_test_mulrev' and tag is
     * 'entity_query_entity_test_mulrev_alter_tag_test'.
     *
     * @see Drupal\KernelTests\Core\Entity\EntityQueryTest::testAlterHook
     */
    public function entityQueryTagEntityTestMulrevEntityQueryEntityTestMulrevAlterTagTestAlter(QueryInterface $query) : void {
        $query->condition('id', '15', '<>');
    }

}