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<?php
namespace Drupal\forum\Form;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
use Drupal\taxonomy\TermForm;
/**
* Base form for forum term edit forms.
*/
class ForumForm extends TermForm {
/**
* Reusable type field to use in status messages.
*
* @var string
*/
protected $forumFormType;
/**
* Reusable url stub to use in watchdog messages.
*
* @var string
*/
protected $urlStub = 'forum';
/**
* {@inheritdoc}
*/
public function form(array $form, FormStateInterface $form_state) {
$taxonomy_term = $this->entity;
// Build the bulk of the form from the parent taxonomy term form.
$form = parent::form($form, $form_state, $taxonomy_term);
// Set the title and description of the name field.
$form['name']['#title'] = $this->t('Forum name');
$form['name']['#description'] = $this->t('Short but meaningful name for this collection of threaded discussions.');
// Change the description.
$form['description']['#description'] = $this->t('Description and guidelines for discussions within this forum.');
// Re-use the weight field.
$form['weight'] = $form['relations']['weight'];
// Remove the remaining relations fields.
unset($form['relations']);
// Our parent field is different to the taxonomy term.
$form['parent']['#tree'] = TRUE;
$form['parent'][0] = $this->forumParentSelect($taxonomy_term->id(), $this->t('Parent'));
$form['#theme_wrappers'] = ['form__forum'];
$this->forumFormType = $this->t('forum');
return $form;
}
/**
* {@inheritdoc}
*/
public function buildEntity(array $form, FormStateInterface $form_state) {
$term = parent::buildEntity($form, $form_state);
// Assign parents from forum parent select field.
$term->parent = [$form_state->getValue(['parent', 0])];
return $term;
}
/**
* {@inheritdoc}
*/
public function save(array $form, FormStateInterface $form_state) {
$term = $this->entity;
$term_storage = $this->entityManager->getStorage('taxonomy_term');
$status = $term_storage->save($term);
$route_name = $this->urlStub == 'container' ? 'entity.taxonomy_term.forum_edit_container_form' : 'entity.taxonomy_term.forum_edit_form';
$route_parameters = ['taxonomy_term' => $term->id()];
$link = $this->l($this->t('Edit'), new Url($route_name, $route_parameters));
$view_link = $term->link($term->getName());
switch ($status) {
case SAVED_NEW:
drupal_set_message($this->t('Created new @type %term.', ['%term' => $view_link, '@type' => $this->forumFormType]));
$this->logger('forum')->notice('Created new @type %term.', ['%term' => $term->getName(), '@type' => $this->forumFormType, 'link' => $link]);
$form_state->setValue('tid', $term->id());
break;
case SAVED_UPDATED:
drupal_set_message($this->t('The @type %term has been updated.', ['%term' => $term->getName(), '@type' => $this->forumFormType]));
$this->logger('forum')->notice('Updated @type %term.', ['%term' => $term->getName(), '@type' => $this->forumFormType, 'link' => $link]);
break;
}
$form_state->setRedirect('forum.overview');
return $term;
}
/**
* {@inheritdoc}
*/
protected function actions(array $form, FormStateInterface $form_state) {
$actions = parent::actions($form, $form_state);
if (!$this->entity->isNew() && $this->entity->hasLinkTemplate('forum-delete-form')) {
$actions['delete']['#url'] = $this->entity->urlInfo('forum-delete-form');
}
else {
unset($actions['delete']);
}
return $actions;
}
/**
* Returns a select box for available parent terms.
*
* @param int $tid
* ID of the term that is being added or edited.
* @param string $title
* Title for the select box.
*
* @return array
* A select form element.
*/
protected function forumParentSelect($tid, $title) {
$taxonomy_storage = $this->entityManager->getStorage('taxonomy_term');
$parents = $taxonomy_storage->loadParents($tid);
if ($parents) {
$parent = array_shift($parents);
$parent = $parent->id();
}
else {
$parent = 0;
}
$vid = $this->config('forum.settings')->get('vocabulary');
$children = $taxonomy_storage->loadTree($vid, $tid, NULL, TRUE);
// A term can't be the child of itself, nor of its children.
foreach ($children as $child) {
$exclude[] = $child->tid;
}
$exclude[] = $tid;
$tree = $taxonomy_storage->loadTree($vid, 0, NULL, TRUE);
$options[0] = '<' . $this->t('root') . '>';
if ($tree) {
foreach ($tree as $term) {
if (!in_array($term->id(), $exclude)) {
$options[$term->id()] = str_repeat(' -- ', $term->depth) . $term->getName();
}
}
}
$description = $this->t('Forums may be placed at the top (root) level, or inside another container or forum.');
return [
'#type' => 'select',
'#title' => $title,
'#default_value' => $parent,
'#options' => $options,
'#description' => $description,
'#required' => TRUE,
];
}
}