options_test.module

<?php


/**
 * @file
 * Helper module for the List module tests.
 */
use Drupal\Core\Entity\FieldableEntityInterface;
use Drupal\Core\Field\FieldStorageDefinitionInterface;
use Drupal\Core\Form\FormStateInterface;

/**
 * Implements callback_allowed_values_function().
 *
 * @see options_allowed_values()
 */
function options_test_allowed_values_callback(FieldStorageDefinitionInterface $definition, ?FieldableEntityInterface $entity = NULL) {
    $values = [
        'Group 1' => [
            0 => 'Zero',
        ],
        1 => 'One',
        'Group 2' => [
            2 => 'Some <script>dangerous</script> & unescaped <strong>markup</strong>',
        ],
        'More <script>dangerous</script> markup' => [
            3 => 'Three',
        ],
    ];
    return $values;
}

/**
 * Implements callback_allowed_values_function().
 *
 * @todo This function violates the recommendation in options_allowed_values()
 *   to return a list of all possible values in any context when $items is
 *   NULL. Since this is not yet used for testing Views integration, that is
 *   alright for now. Fix this in https://www.drupal.org/node/2012130.
 *
 * @see options_allowed_values()
 */
function options_test_dynamic_values_callback(FieldStorageDefinitionInterface $definition, ?FieldableEntityInterface $entity = NULL, &$cacheable = NULL) {
    $values = [];
    if (isset($entity)) {
        $cacheable = FALSE;
        $values = [
            $entity->label(),
            $entity->toUrl()
                ->toString(),
            $entity->uuid(),
            $entity->bundle(),
        ];
    }
    // We need the values of the entity as keys.
    return array_combine($values, $values);
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function options_test_form_entity_test_entity_test_form_alter(&$form, FormStateInterface $form_state, $form_id) {
    if (\Drupal::state()->get('options_test.form_alter_enable', FALSE)) {
        $form['card_1']['widget']['#required_error'] = t('This is custom message for required field.');
    }
}

/**
 * Implements hook_options_list_alter().
 */
function options_test_options_list_alter(array &$options, array $context) {
    if ($context['fieldDefinition']->getName() === 'card_4' && $context['widget']->getPluginId() === 'options_select') {
        // Rename _none option.
        $options['_none'] = '- Select something -';
    }
    if ($context['fieldDefinition']->getName() === 'card_4' && $context['entity']->bundle() === 'entity_test') {
        // Remove 0 option.
        unset($options[0]);
    }
}