reserve/reserve.module

<?php

/**
 * @file
 * Contains reserve.module..
 *
 * @todo: fix reserve cat field with cardinality of 1
 *
 */

use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Entity\BundleEntityFormBase;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Form\FormStateInterface;

define ('RESERVE_SAVE_CONFIRMATION_MSG', t('Configuration settings have been saved'));
define ('RESERVE_RESET_CONFIRMATION_MSG', t('Configuration settings have been reset to their default values'));

module_load_include('inc', 'reserve', 'reserve');
module_load_include('inc', 'reserve', 'reserve.series');
module_load_include('inc', 'reserve', 'reservation');

$GLOBALS['debug'] = false;

/**
 * Implements hook_help().
 */
function reserve_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the reserve module.
    case 'help.page.reserve':
      $output = '';
      $output .= '<h3>' . t('Overview') . '</h3>';
      $output .= '<p>' . t('The Reserve module allows for the "booking" of entities. It provides a calendar for each bundle which is set up to be bookable.
      From this calendar you can see what time slots have been booked as well as select a time slot to book. Many options are provided to make a very flexible
      booking system.') . '</p>';
      $output .= '<h3>' . t('Setup') . '</h3>';
      $output .= '<p>' . t('A few things must be set up before you may use the booking system:') . '</p>
        <ul>
        <li>' . t('Create the content bundle which is to be reservable. E.g. Room') . '</li>
        <li>' . t('Create Reservation Categories as required. E.g. Large, Small. Set required values for each category.') . '</li>
        <li>' . t('Add the Reservation Category field type to the bundle which you want to make reservable. Select which Reservation Categories
        will apply to this bundle.') . '</li>
        <li>' . t('Review the settings under Reserve Settings and modify as required.') . '</li>
        <li>' . t('Set required permissions.') . '</li>
        <li>' . t('Finally, define the default times that entities are reservable. You may also set any daily overrides that may be required (optional).') . '</li>
        </ul>
        <p>' . t('The booking calendar will now be available at /reserve/{entitytype.bundle}/calendar. E.g. /reserve/node.room/calendar') . '</p>';

      return $output;

    default:
  }
}

 /**
 * Implements hook_entity_insert().
 */
function reserve_entity_insert(EntityInterface $entity) {
  reserve_entity_type_save($entity);
}

/**
 * Implements hook_entity_update().
 */
function reserve_entity_update(EntityInterface $entity) {
  reserve_entity_type_save($entity);
}

/**
 * Helper to save group information.
 *
 * @param \Drupal\Core\Entity\EntityInterface $entity
 *   The entity object.
 */
function reserve_entity_type_save(EntityInterface $entity) {
  $bundle = $entity->id();
  $definition = \Drupal::entityTypeManager()->getDefinition($entity->getEntityTypeId());
  $entity_type_id = $definition->getBundleOf();
}

/**
 * Implements hook_theme().
 */
function reserve_theme($existing, $type, $theme, $path) {
  return array(
    'calendar_template' => array(
      'variables' => array(
        'date_picker' => NULL,
        'arrow' => NULL,
        'date' => NULL,
        'calendar_text' => NULL,
        'dates' => NULL,
        'categories' => NULL,
        'calendar_header' => NULL,
        'reservation_instructions' => NULL,
        'building_hours_display' => NULL,
      ),
    ),
  );
}