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<?php
namespace Drupal\taxonomy\ContextProvider;
use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Plugin\Context\Context;
use Drupal\Core\Plugin\Context\ContextProviderInterface;
use Drupal\Core\Plugin\Context\EntityContext;
use Drupal\Core\Plugin\Context\EntityContextDefinition;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\taxonomy\Entity\Term;
/**
* Sets the current taxonomy term as a context on taxonomy term routes.
*/
class TermRouteContext implements ContextProviderInterface {
use StringTranslationTrait;
/**
* The route match object.
*
* @var \Drupal\Core\Routing\RouteMatchInterface
*/
protected $routeMatch;
/**
* Constructs a new TermRouteContext.
*
* @param \Drupal\Core\Routing\RouteMatchInterface $route_match
* The route match object.
*/
public function __construct(RouteMatchInterface $route_match) {
$this->routeMatch = $route_match;
}
/**
* {@inheritdoc}
*/
public function getRuntimeContexts(array $unqualified_context_ids) {
$result = [];
$context_definition = EntityContextDefinition::create('taxonomy_term')->setRequired(FALSE);
$value = NULL;
if ($route_object = $this->routeMatch->getRouteObject()) {
$route_parameters = $route_object->getOption('parameters');
if (isset($route_parameters['taxonomy_term']) && $term = $this->routeMatch->getParameter('taxonomy_term')) {
$value = $term;
}
elseif ($this->routeMatch->getRouteName() == 'entity.taxonomy_term.add_form') {
$vocabulary = $this->routeMatch->getParameter('taxonomy_vocabulary');
$value = Term::create(['vid' => $vocabulary->id()]);
}
}
$cacheability = new CacheableMetadata();
$cacheability->setCacheContexts(['route']);
$context = new Context($context_definition, $value);
$context->addCacheableDependency($cacheability);
$result['taxonomy_term'] = $context;
return $result;
}
/**
* {@inheritdoc}
*/
public function getAvailableContexts() {
$context = EntityContext::fromEntityTypeId('taxonomy_term', $this->t('Term from URL'));
return ['taxonomy_term' => $context];
}
}
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