RouteCacheContext.php

<?php

namespace Drupal\Core\Cache\Context;

use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Defines the RouteCacheContext service, for "per route" caching.
 *
 * Cache context ID: 'route'.
 */
class RouteCacheContext implements CacheContextInterface {
    
    /**
     * The route match.
     *
     * @var \Drupal\Core\Routing\RouteMatchInterface
     */
    protected $routeMatch;
    
    /**
     * Constructs a new RouteCacheContext class.
     *
     * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
     *   The route match.
     */
    public function __construct(RouteMatchInterface $route_match) {
        $this->routeMatch = $route_match;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function getLabel() {
        return t('Route');
    }
    
    /**
     * {@inheritdoc}
     */
    public function getContext() {
        return $this->routeMatch
            ->getRouteName() . hash('sha256', serialize($this->routeMatch
            ->getRawParameters()
            ->all()));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheableMetadata() {
        return new CacheableMetadata();
    }

}