donation.module

<?php

/**
 * @file
 * Contains donation.module.
 */

/**
 * Implements hook_theme().
 */
function donation_theme() {
  $theme = [];
  $theme['donation'] = [
    'render element' => 'elements',
    'file' => 'donation.page.inc',
    'template' => 'donation',
  ];
  $theme['donation_content_add_list'] = [
    'render element' => 'content',
    'variables' => ['content' => NULL],
    'file' => 'donation.page.inc',
  ];
  return $theme;
}

/**
 * Implements hook_theme_suggestions_HOOK().
 */
function donation_theme_suggestions_donation(array $variables) {
  $suggestions = [];
  $entity = $variables['elements']['#donation'];
  $sanitized_view_mode = strtr($variables['elements']['#view_mode'], '.', '_');

  $suggestions[] = 'donation__' . $sanitized_view_mode;
  $suggestions[] = 'donation__' . $entity->bundle();
  $suggestions[] = 'donation__' . $entity->bundle() . '__' . $sanitized_view_mode;
  $suggestions[] = 'donation__' . $entity->id();
  $suggestions[] = 'donation__' . $entity->id() . '__' . $sanitized_view_mode;
  return $suggestions;
}

/**
 * Implements hook_entity_base_field_info_alter().
 */

function donation_entity_base_field_info_alter(&$fields, $entity_type) {
  // By default email address field of user entity is hidden in 'Manage display"
  // tab.
  if ($entity_type->id() == 'user') {
    if (isset($fields['mail'])) {
      $fields['mail']->setDisplayConfigurable('view', TRUE);
      $fields['mail']->setDisplayConfigurable('form', TRUE);
    }
  }
}