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<?php
namespace Drupal\node\Plugin\views\field;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
use Drupal\views\ResultRow;
use Drupal\views\ViewExecutable;
use Drupal\views\Plugin\views\display\DisplayPluginBase;
use Drupal\views\Plugin\views\field\FieldPluginBase;
/**
* Field handler to provide simple renderer that allows linking to a node.
* Definition terms:
* - link_to_node default: Should this field have the checkbox "link to node" enabled by default.
*
* @ingroup views_field_handlers
*
* @ViewsField("node")
*/
class Node extends FieldPluginBase {
/**
* {@inheritdoc}
*/
public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL) {
parent::init($view, $display, $options);
// Don't add the additional fields to groupby
if (!empty($this->options['link_to_node'])) {
$this->additional_fields['nid'] = ['table' => 'node_field_data', 'field' => 'nid'];
}
}
/**
* {@inheritdoc}
*/
protected function defineOptions() {
$options = parent::defineOptions();
$options['link_to_node'] = ['default' => isset($this->definition['link_to_node default']) ? $this->definition['link_to_node default'] : FALSE];
return $options;
}
/**
* Provide link to node option
*/
public function buildOptionsForm(&$form, FormStateInterface $form_state) {
$form['link_to_node'] = [
'#title' => $this->t('Link this field to the original piece of content'),
'#description' => $this->t("Enable to override this field's links."),
'#type' => 'checkbox',
'#default_value' => !empty($this->options['link_to_node']),
];
parent::buildOptionsForm($form, $form_state);
}
/**
* Prepares link to the node.
*
* @param string $data
* The XSS safe string for the link text.
* @param \Drupal\views\ResultRow $values
* The values retrieved from a single row of a view's query result.
*
* @return string
* Returns a string for the link text.
*/
protected function renderLink($data, ResultRow $values) {
if (!empty($this->options['link_to_node']) && !empty($this->additional_fields['nid'])) {
if ($data !== NULL && $data !== '') {
$this->options['alter']['make_link'] = TRUE;
$this->options['alter']['url'] = Url::fromRoute('entity.node.canonical', ['node' => $this->getValue($values, 'nid')]);
if (isset($this->aliases['langcode'])) {
$languages = \Drupal::languageManager()->getLanguages();
$langcode = $this->getValue($values, 'langcode');
if (isset($languages[$langcode])) {
$this->options['alter']['language'] = $languages[$langcode];
}
else {
unset($this->options['alter']['language']);
}
}
}
else {
$this->options['alter']['make_link'] = FALSE;
}
}
return $data;
}
/**
* {@inheritdoc}
*/
public function render(ResultRow $values) {
$value = $this->getValue($values);
return $this->renderLink($this->sanitizeValue($value), $values);
}
}