recurring_events-2.0.x-dev/modules/recurring_events_ical/recurring_events_ical.module

<?php

/**
 * @file
 * Contains recurring_events_ical.module.
 */

declare(strict_types=1);

use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Field\BaseFieldDefinition;
use Drupal\Core\Form\FormStateInterface;

/**
 * Implements hook_entity_base_field_info_alter().
 */
function recurring_events_ical_entity_base_field_info_alter(&$fields, EntityTypeInterface $entity_type) {
  if ($entity_type->id() === 'eventseries' || $entity_type->id() === 'eventinstance') {
    $fields['event_ical_link'] = BaseFieldDefinition::create('event_ical_link')
      ->setName('event_ical_link')
      ->setLabel(t('Event iCalendar Link'))
      ->setComputed(TRUE)
      ->setClass('\Drupal\recurring_events_ical\Field\EventICalLinkItemList')
      ->setTargetEntityTypeId($entity_type->id())
      ->setDisplayConfigurable('form', FALSE)
      ->setDisplayConfigurable('view', TRUE)
      ->setDisplayOptions('view', [
        'label' => 'hidden',
        'weight' => 10,
      ]);
  }
}

/**
 * Implements hook_entity_type_alter().
 */
function recurring_events_ical_entity_type_alter(array &$entity_types) {
  /** @var \Drupal\Core\Entity\EntityTypeInterface[] $entity_types */
  $entity_types['eventseries']->setLinkTemplate('ical', $entity_types['eventseries']->getLinkTemplate('canonical') . '/ical');
  $entity_types['eventinstance']->setLinkTemplate('ical', $entity_types['eventinstance']->getLinkTemplate('canonical') . '/ical');
}

/**
 * Implements hook_config_schema_info_alter().
 */
function recurring_events_ical_config_schema_info_alter(&$definitions) {
  foreach (['eventseries', 'eventinstance'] as $entity_type) {
    $definitions["recurring_events.$entity_type.config"]['mapping']['ical_link_title'] = [
      'type' => 'string',
      'label' => 'iCalendar link title',
    ];
  }
}

/**
 * Implements hook_form_FORM_ID_alter() for 'eventseries_settings'.
 */
function recurring_events_ical_form_eventseries_settings_alter(&$form, FormStateInterface $form_state, $form_id) {
  _recurring_events_ical_settings($form, 'eventseries');
  $form['#submit'][] = 'recurring_events_ical_form_eventseries_settings_submit';
}

/**
 * Implements hook_form_FORM_ID_alter() for 'eventinstance_settings'.
 */
function recurring_events_ical_form_eventinstance_settings_alter(&$form, FormStateInterface $form_state, $form_id) {
  _recurring_events_ical_settings($form, 'eventinstance');
  $form['#submit'][] = 'recurring_events_ical_form_eventinstance_settings_submit';
}

/**
 * Helper function to add the iCalendar settings fields to a form.
 *
 * @param array &$form
 *   Nested array of form elements that comprise the form.
 * @param string $entity_type
 *   The type of event entity, either 'eventseries' or 'eventinstance'.
 */
function _recurring_events_ical_settings(array &$form, string $entity_type) {
  $config = \Drupal::config("recurring_events.$entity_type.config");

  /** @var \Drupal\token\TokenEntityMapperInterface $token_entity_mapper */
  $token_entity_mapper = \Drupal::service('token.entity_mapper');
  $token_types[$entity_type] = $token_entity_mapper->getTokenTypeForEntityType($entity_type);

  $form['ical'] = [
    '#type' => 'details',
    '#title' => t('iCalendar'),
    '#open' => TRUE,
  ];
  $form['ical']['ical_link_title'] = [
    '#type' => 'textfield',
    '#title' => t('iCalendar Link Title'),
    '#description' => t('Link text for the Event iCalendar Link field.'),
    '#size' => 65,
    '#maxlength' => 1280,
    '#element_validate' => ['token_element_validate'],
    '#after_build' => ['token_element_validate'],
    '#token_types' => $token_types,
    '#default_value' => $config->get('ical_link_title') ?? t('Download as iCal'),
  ];
  $form['ical']['token_browser'] = [
    '#theme' => 'token_tree_link',
    '#token_types' => $token_types,
    '#global_types' => TRUE,
    '#show_nested' => TRUE,
  ];
}

/**
 * Additional submission handler for the eventseries_settings form.
 *
 * @param array &$form
 *   Nested array of form elements that comprise the form.
 * @param \Drupal\Core\Form\FormStateInterface $form_state
 *   The form state.
 */
function recurring_events_ical_form_eventseries_settings_submit(array &$form, FormStateInterface $form_state) {
  \Drupal::configFactory()->getEditable('recurring_events.eventseries.config')
    ->set('ical_link_title', $form_state->getValue('ical_link_title'))
    ->save();
}

/**
 * Additional submission handler for the eventinstance_settings form.
 *
 * @param array &$form
 *   Nested array of form elements that comprise the form.
 * @param \Drupal\Core\Form\FormStateInterface $form_state
 *   The form state.
 */
function recurring_events_ical_form_eventinstance_settings_submit(array &$form, FormStateInterface $form_state) {
  \Drupal::configFactory()->getEditable('recurring_events.eventinstance.config')
    ->set('ical_link_title', $form_state->getValue('ical_link_title'))
    ->save();
}