annotate core/lib/Drupal/Core/PageCache/ChainRequestPolicy.php @ 19:fa3358dc1485 tip

Add ndrum files
author Chris Cannam
date Wed, 28 Aug 2019 13:14:47 +0100
parents 4c8ae668cc8c
children
rev   line source
Chris@0 1 <?php
Chris@0 2
Chris@0 3 namespace Drupal\Core\PageCache;
Chris@0 4
Chris@0 5 use Symfony\Component\HttpFoundation\Request;
Chris@0 6
Chris@0 7 /**
Chris@0 8 * Implements a compound request policy.
Chris@0 9 *
Chris@0 10 * When evaluating the compound policy, all of the contained rules are applied
Chris@0 11 * to the request. The overall result is computed according to the following
Chris@0 12 * rules:
Chris@0 13 *
Chris@0 14 * <ol>
Chris@0 15 * <li>Returns static::DENY if any of the rules evaluated to static::DENY</li>
Chris@0 16 * <li>Returns static::ALLOW if at least one of the rules evaluated to
Chris@0 17 * static::ALLOW and none to static::DENY</li>
Chris@0 18 * <li>Otherwise returns NULL</li>
Chris@0 19 * </ol>
Chris@0 20 */
Chris@0 21 class ChainRequestPolicy implements ChainRequestPolicyInterface {
Chris@0 22
Chris@0 23 /**
Chris@0 24 * A list of policy rules to apply when this policy is evaluated.
Chris@0 25 *
Chris@0 26 * @var \Drupal\Core\PageCache\RequestPolicyInterface[]
Chris@0 27 */
Chris@0 28 protected $rules = [];
Chris@0 29
Chris@0 30 /**
Chris@0 31 * {@inheritdoc}
Chris@0 32 */
Chris@0 33 public function check(Request $request) {
Chris@0 34 $final_result = NULL;
Chris@0 35
Chris@0 36 foreach ($this->rules as $rule) {
Chris@0 37 $result = $rule->check($request);
Chris@0 38 if ($result === static::DENY) {
Chris@0 39 return $result;
Chris@0 40 }
Chris@0 41 elseif ($result === static::ALLOW) {
Chris@0 42 $final_result = $result;
Chris@0 43 }
Chris@0 44 elseif (isset($result)) {
Chris@0 45 throw new \UnexpectedValueException('Return value of RequestPolicyInterface::check() must be one of RequestPolicyInterface::ALLOW, RequestPolicyInterface::DENY or NULL');
Chris@0 46 }
Chris@0 47 }
Chris@0 48
Chris@0 49 return $final_result;
Chris@0 50 }
Chris@0 51
Chris@0 52 /**
Chris@0 53 * {@inheritdoc}
Chris@0 54 */
Chris@0 55 public function addPolicy(RequestPolicyInterface $policy) {
Chris@0 56 $this->rules[] = $policy;
Chris@0 57 return $this;
Chris@0 58 }
Chris@0 59
Chris@0 60 }