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<?php
namespace Drupal\search\Form;
use Drupal\Core\Entity\EntityForm;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
/**
* Provides a search form for site wide search.
*
* Search plugins can define method searchFormAlter() to alter the form. If they
* have additional or substitute fields, they will need to override the form
* submit, making sure to redirect with a GET parameter of 'keys' included, to
* trigger the search being processed by the controller, and adding in any
* additional query parameters they need to execute search.
*/
class SearchPageForm extends EntityForm {
/**
* {@inheritdoc}
*
* @var \Drupal\search\SearchPageInterface
*/
protected $entity;
/**
* {@inheritdoc}
*/
public function getFormId() {
return 'search_form';
}
/**
* {@inheritdoc}
*/
public function form(array $form, FormStateInterface $form_state) {
$plugin = $this->entity->getPlugin();
$form_state->set('search_page_id', $this->entity->id());
$form['basic'] = [
'#type' => 'container',
'#attributes' => [
'class' => ['container-inline'],
],
];
$form['basic']['keys'] = [
'#type' => 'search',
'#title' => $this->t('Enter your keywords'),
'#default_value' => $plugin->getKeywords(),
'#size' => 30,
'#maxlength' => 255,
];
// processed_keys is used to coordinate keyword passing between other forms
// that hook into the basic search form.
$form['basic']['processed_keys'] = [
'#type' => 'value',
'#value' => '',
];
$form['basic']['submit'] = [
'#type' => 'submit',
'#value' => $this->t('Search'),
];
$form['help_link'] = [
'#type' => 'link',
'#url' => new Url('search.help_' . $this->entity->id()),
'#title' => $this->t('Search help'),
'#options' => ['attributes' => ['class' => 'search-help-link']],
];
// Allow the plugin to add to or alter the search form.
$plugin->searchFormAlter($form, $form_state);
return parent::form($form, $form_state);
}
/**
* {@inheritdoc}
*/
protected function actions(array $form, FormStateInterface $form_state) {
// The submit button is added in the form directly.
return [];
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
// Redirect to the search page with keywords in the GET parameters.
// Plugins with additional search parameters will need to provide their
// own form submit handler to replace this, so they can put their values
// into the GET as well. If so, make sure to put 'keys' into the GET
// parameters so that the search results generation is triggered.
$query = $this->entity->getPlugin()->buildSearchUrlQuery($form_state);
$route = 'search.view_' . $form_state->get('search_page_id');
$form_state->setRedirect(
$route,
[],
['query' => $query]
);
}
}