optional_end_date.module in Optional End Date 8

Make the end date in a Date range field optional.

File

optional_end_date.module

<?php

/**
 * @file
 * Make the end date in a Date range field optional.
 */
use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_field_info_alter().
 */
function optional_end_date_field_info_alter(&$info) {
  if (isset($info['daterange'])) {
    $info['daterange']['class'] = 'Drupal\\optional_end_date\\Plugin\\Field\\FieldType\\OptionalEndDateDateRangeItem';
  }
}

/**
 * Implements hook_field_formatter_info_alter().
 */
function optional_end_date_field_formatter_info_alter(&$info) {
  if (isset($info['daterange_default'])) {
    $info['daterange_default']['class'] = 'Drupal\\optional_end_date\\Plugin\\Field\\FieldFormatter\\OptionalEndDateDateRangeDefaultFormatter';
    $info['daterange_plain']['class'] = 'Drupal\\optional_end_date\\Plugin\\Field\\FieldFormatter\\OptionalEndDateDateRangePlainFormatter';
    $info['daterange_custom']['class'] = 'Drupal\\optional_end_date\\Plugin\\Field\\FieldFormatter\\OptionalEndDateDateRangeCustomFormatter';
  }
}

/**
 * Implements hook_field_formatter_info_alter().
 */
function optional_end_date_field_widget_info_alter(&$info) {
  if (isset($info['daterange_default'])) {
    $info['daterange_default']['class'] = 'Drupal\\optional_end_date\\Plugin\\Field\\FieldWidget\\OptionalEndDateDateRangeDefaultWidget';
    $info['daterange_datelist']['class'] = 'Drupal\\optional_end_date\\Plugin\\Field\\FieldWidget\\OptionalEndDateDateRangeDatelistWidget';
  }
}

/**
 * Implements hook_help().
 */
function optional_end_date_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.optional_end_date':
      $text = file_get_contents(__DIR__ . "/README.txt");
      if (!\Drupal::moduleHandler()
        ->moduleExists('markdown')) {
        return '<pre>' . $text . '</pre>';
      }
      else {

        // Use the Markdown filter to render the README.
        $filter_manager = \Drupal::service('plugin.manager.filter');
        $settings = \Drupal::configFactory()
          ->get('markdown.settings')
          ->getRawData();
        $config = [
          'settings' => $settings,
        ];
        $filter = $filter_manager
          ->createInstance('markdown', $config);
        return $filter
          ->process($text, 'en');
      }
  }
  return NULL;
}

Functions

Name	Description
optional_end_date_field_formatter_info_alter	Implements hook_field_formatter_info_alter().
optional_end_date_field_info_alter	Implements hook_field_info_alter().
optional_end_date_field_widget_info_alter	Implements hook_field_formatter_info_alter().
optional_end_date_help	Implements hook_help().