--- /dev/null
+<?php
+
+namespace Drupal\inline_entity_form\Element;
+
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Render\Element;
+use Drupal\Core\Render\Element\RenderElement;
+use Drupal\inline_entity_form\ElementSubmit;
+use Drupal\inline_entity_form\TranslationHelper;
+
+/**
+ * Provides an inline entity form element.
+ *
+ * Usage example:
+ * @code
+ * $form['article'] = [
+ * '#type' => 'inline_entity_form',
+ * '#entity_type' => 'node',
+ * '#bundle' => 'article',
+ * // If the #default_value is NULL, a new entity will be created.
+ * '#default_value' => $loaded_article,
+ * ];
+ * @endcode
+ * To access the entity in validation or submission callbacks, use
+ * $form['article']['#entity']. Due to Drupal core limitations the entity
+ * can't be accessed via $form_state->getValue('article').
+ *
+ * @RenderElement("inline_entity_form")
+ */
+class InlineEntityForm extends RenderElement {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getInfo() {
+ $class = get_class($this);
+ return [
+ '#ief_id' => '',
+ '#entity_type' => NULL,
+ '#bundle' => NULL,
+ '#langcode' => NULL,
+ // Instance of \Drupal\Core\Entity\EntityInterface. If NULL, a new
+ // entity will be created.
+ '#default_value' => NULL,
+ // The form mode used to display the entity form.
+ '#form_mode' => 'default',
+ // Will save entity on submit if set to TRUE.
+ '#save_entity' => TRUE,
+ // 'add' or 'edit'. If NULL, determined by whether the entity is new.
+ '#op' => NULL,
+ '#process' => [
+ [$class, 'processEntityForm'],
+ ],
+ '#element_validate' => [
+ [$class, 'validateEntityForm'],
+ ],
+ '#ief_element_submit' => [
+ [$class, 'submitEntityForm'],
+ ],
+ '#theme_wrappers' => ['container'],
+ // Allow inline forms to use the #fieldset key.
+ '#pre_render' => [
+ [$class, 'addFieldsetMarkup'],
+ ],
+ ];
+ }
+
+ /**
+ * Builds the entity form using the inline form handler.
+ *
+ * @param array $entity_form
+ * The entity form.
+ * @param \Drupal\Core\Form\FormStateInterface $form_state
+ * The current state of the form.
+ * @param array $complete_form
+ * The complete form structure.
+ *
+ * @throws \InvalidArgumentException
+ * Thrown when the #entity_type or #bundle properties are empty, or when
+ * the #default_value property is not an entity.
+ *
+ * @return array
+ * The built entity form.
+ */
+ public static function processEntityForm($entity_form, FormStateInterface $form_state, &$complete_form) {
+ if (empty($entity_form['#entity_type'])) {
+ throw new \InvalidArgumentException('The inline_entity_form element requires the #entity_type property.');
+ }
+ if (isset($entity_form['#default_value']) && !($entity_form['#default_value'] instanceof EntityInterface)) {
+ throw new \InvalidArgumentException('The inline_entity_form #default_value property must be an entity object.');
+ }
+
+ if (empty($entity_form['#ief_id'])) {
+ $entity_form['#ief_id'] = \Drupal::service('uuid')->generate();
+ }
+ if (isset($entity_form['#default_value'])) {
+ // Transfer the #default_value to #entity, as expected by inline forms.
+ $entity_form['#entity'] = $entity_form['#default_value'];
+ }
+ else {
+ // This is an add operation, create a new entity.
+ $entity_type = \Drupal::entityTypeManager()->getDefinition($entity_form['#entity_type']);
+ $storage = \Drupal::entityTypeManager()->getStorage($entity_form['#entity_type']);
+ $values = [];
+ if ($langcode_key = $entity_type->getKey('langcode')) {
+ if (!empty($entity_form['#langcode'])) {
+ $values[$langcode_key] = $entity_form['#langcode'];
+ }
+ }
+ if ($bundle_key = $entity_type->getKey('bundle')) {
+ $values[$bundle_key] = $entity_form['#bundle'];
+ }
+ $entity_form['#entity'] = $storage->create($values);
+ }
+ if (!isset($entity_form['#op'])) {
+ $entity_form['#op'] = $entity_form['#entity']->isNew() ? 'add' : 'edit';
+ }
+ // Prepare the entity form and the entity itself for translating.
+ $entity_form['#entity'] = TranslationHelper::prepareEntity($entity_form['#entity'], $form_state);
+ $entity_form['#translating'] = TranslationHelper::isTranslating($form_state) && $entity_form['#entity']->isTranslatable();
+
+ $inline_form_handler = static::getInlineFormHandler($entity_form['#entity_type']);
+ $entity_form = $inline_form_handler->entityForm($entity_form, $form_state);
+ // The form element can't rely on inline_entity_form_form_alter() calling
+ // ElementSubmit::attach() since form alters run before #process callbacks.
+ ElementSubmit::attach($complete_form, $form_state);
+
+ return $entity_form;
+ }
+
+ /**
+ * Validates the entity form using the inline form handler.
+ *
+ * @param array $entity_form
+ * The entity form.
+ * @param \Drupal\Core\Form\FormStateInterface $form_state
+ * The current state of the form.
+ */
+ public static function validateEntityForm(&$entity_form, FormStateInterface $form_state) {
+ $inline_form_handler = static::getInlineFormHandler($entity_form['#entity_type']);
+ $inline_form_handler->entityFormValidate($entity_form, $form_state);
+ }
+
+ /**
+ * Handles the submission of the entity form using the inline form handler.
+ *
+ * @param array $entity_form
+ * The entity form.
+ * @param \Drupal\Core\Form\FormStateInterface $form_state
+ * The current state of the form.
+ */
+ public static function submitEntityForm(&$entity_form, FormStateInterface $form_state) {
+ $inline_form_handler = static::getInlineFormHandler($entity_form['#entity_type']);
+ $inline_form_handler->entityFormSubmit($entity_form, $form_state);
+ if ($entity_form['#save_entity']) {
+ $inline_form_handler->save($entity_form['#entity']);
+ }
+ }
+
+ /**
+ * Gets the inline form handler for the given entity type.
+ *
+ * @param string $entity_type
+ * The entity type id.
+ *
+ * @throws \InvalidArgumentException
+ * Thrown when the entity type has no inline form handler defined.
+ *
+ * @return \Drupal\inline_entity_form\InlineFormInterface
+ * The inline form handler.
+ */
+ public static function getInlineFormHandler($entity_type) {
+ $inline_form_handler = \Drupal::entityTypeManager()->getHandler($entity_type, 'inline_form');
+ if (empty($inline_form_handler)) {
+ throw new \InvalidArgumentException(sprintf('The %s entity type has no inline form handler.', $entity_type));
+ }
+
+ return $inline_form_handler;
+ }
+
+ /**
+ * Pre-render callback for the #fieldset form property.
+ *
+ * Inline forms use #tree = TRUE to keep their values in a hierarchy for
+ * easier storage. Moving the form elements into fieldsets during form
+ * building would break up that hierarchy, so it's not an option for entity
+ * fields. Therefore, we wait until the pre_render stage, where any changes
+ * we make affect presentation only and aren't reflected in $form_state.
+ *
+ * @param array $entity_form
+ * The entity form.
+ *
+ * @return array
+ * The modified entity form.
+ */
+ public static function addFieldsetMarkup($entity_form) {
+ $sort = [];
+ foreach (Element::children($entity_form) as $key) {
+ $element = $entity_form[$key];
+ if (isset($element['#fieldset']) && isset($entity_form[$element['#fieldset']])) {
+ $entity_form[$element['#fieldset']][$key] = $element;
+ // Remove the original element this duplicates.
+ unset($entity_form[$key]);
+ // Mark the fieldset for sorting.
+ if (!in_array($key, $sort)) {
+ $sort[] = $element['#fieldset'];
+ }
+ }
+ }
+
+ // Sort all fieldsets, so that element #weight stays respected.
+ foreach ($sort as $key) {
+ uasort($entity_form[$key], '\Drupal\Component\Utility\SortArray::sortByWeightProperty');
+ }
+
+ return $entity_form;
+ }
+
+}
projects / yaffs-website / blobdiff