micro.module

<?php

use Drupal\Component\Utility\Xss;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Render\Element;
use Drupal\Core\Url;

/**
 * Implements hook_permission().
 */
function micro_permission() {
  $permissions['administer micro types'] = array(
    'title' => t('Administer micro types'),
    'description' => t('View, edit and delete all micro types.'),
  );

  $permissions['administer micro content'] = array(
    'title' => t('Administer micro content'),
    'description' => t('View, edit and delete all micro content.'),
  );

  return $permissions;
}

/**
 * Implements hook_theme().
 */
function micro_theme() {
  return array(
    'micro' => array(
      'render element' => 'elements',
      'template' => 'micro',
    ),
    'field__micro__title' => array(
      'base hook' => 'field',
    ),
    'micro_add_list' => [
      'variables' => ['micro' => NULL],
      'template' => 'micro-add-list',
    ],
  );
}


/**
 * Prepares variables for micro templates.
 *
 * Default template: micro.html.twig.
 *
 * @param array $variables
 *   An associative array containing:
 *   - elements: An array of elements to display in view mode.
 *   - node: The micro object.
 *   - view_mode: View mode; e.g., 'full', 'teaser'...
 */
function template_preprocess_micro(&$variables) {
  $variables['view_mode'] = $variables['elements']['#view_mode'];
  // Provide a distinct $teaser boolean.
  $variables['teaser'] = $variables['view_mode'] == 'teaser';
  $variables['micro'] = $variables['elements']['#micro'];

  $variables['label'] = $variables['elements']['title'];
  unset($variables['elements']['title']);

  // Helpful $content variable for templates.
  $variables += array('content' => array());
  foreach (Element::children($variables['elements']) as $key) {
    $variables['content'][$key] = $variables['elements'][$key];
  }
}

/**
 * Implements hook_theme_suggestions_HOOK().
 */
function micro_theme_suggestions_micro(array $variables) {
  $suggestions = array();
  $micro = $variables['elements']['#micro'];

  $suggestions[] = 'micro__' . $micro->bundle();
  $suggestions[] = 'micro__' . $micro->bundle() . '__' . $variables['elements']['#view_mode'];

  return $suggestions;
}

/**
 * Returns HTML for the micro title field.
 *
 * This is an override of theme_field() for the micro title field. See that
 * function for documentation about its details and overrides.
 *
 * @param array $variables
 *   An associative array. See theme_field() for details.
 *
 * @see theme_field()
 *
 * @ingroup themeable
 */
function theme_field__micro__title($variables) {
  return drupal_render($variables['items']);
}

/**
 * Implements hook_entity_type_alter().
 */
function micro_entity_type_alter(&$entity_types) {
  /**
   * @var \Drupal\Core\Entity\EntityType[] $entity_types
   */
  $entity_types['micro']->setFormClass('inline entity form', '\Drupal\micro\Plugin\InlineEntityForm\MicroInlineEntityFormController');
}

/**
 * Prepares variables for list of available micro type templates.
 *
 * Default template: micro-add-list.html.twig.
 *
 * @param array $variables
 *   An associative array containing:
 *   - content: An array of micro types.
 */
function template_preprocess_micro_add_list(&$variables) {
  $variables['types'] = array();
  if (!empty($variables['micro'])) {
    foreach ($variables['micro'] as $type) {
      $variables['types'][$type->type] = array(
        'type' => $type->type,
        'add_link' => \Drupal::l($type->name, Url::fromRoute('micro.add', ['micro_type' => $type->type])),
      );
    }
  }
}