Follow-up for #3279663

namespace Drupal\project_browser\Controller;

use Drupal\Component\Serialization\Json;

use Drupal\Component\Utility\Xss;

use Drupal\Core\Cache\CacheableResponseInterface;

use Drupal\Core\Controller\ControllerBase;

      // Page and limit are checked against a valid list in in_array, below.

      'page' => (int) $request->query->get('page', 0),

      'limit' => (int) $request->query->get('limit', 12),

      'sort' => Xss::filter($request->query->get('sort')),

      'sort' => Xss::filter($request->query->get('sort', '')),

      'direction' => in_array($direction, ['ASC', 'DESC']) ? $direction : 'ASC',

    ];

    $title = $request->query->get('search', NULL);

    $title = $request->query->get('search');

    if ($title) {

      $query['search'] = Xss::filter($title);

    }

    $categories = $request->query->get('categories', NULL);

    $categories = $request->query->get('categories');

    if ($categories) {

      $query['categories'] = Xss::filter($categories);

    }

    $maintenance_status = $request->query->get('maintenance_status', NULL);

    $maintenance_status = $request->query->get('maintenance_status');

    if ($maintenance_status) {

      $query['maintenance_status'] = Xss::filter($maintenance_status);

    }

    $development_status = $request->query->get('development_status', NULL);

    $development_status = $request->query->get('development_status');

    if ($development_status) {

      $query['development_status'] = Xss::filter($development_status);

    }

    $security_advisory_coverage = $request->query->get('security_advisory_coverage', NULL);

    $security_advisory_coverage = $request->query->get('security_advisory_coverage');

    if ($security_advisory_coverage) {

      $query['security_advisory_coverage'] = Xss::filter($security_advisory_coverage);

    }

    // Cache only exact query, down to the page number.

    $cache_key = 'project_browser:projects:' . md5(json_encode($query));

    $cache_key = 'project_browser:projects:' . md5(Json::encode($query));

    if ($projects = $this->cacheBin->get($cache_key)) {

      $projects = $projects->data;

    }