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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\node\Cache\NodeAccessGrantsCacheContext. | |
| */ | |
| namespace Drupal\node\Cache; | |
| use Drupal\Core\Cache\CacheableMetadata; | |
| use Drupal\Core\Cache\Context\CalculatedCacheContextInterface; | |
| use Drupal\Core\Cache\Context\UserCacheContextBase; | |
| /** | |
| * Defines the node access view cache context service. | |
| * | |
| * Cache context ID: 'user.node_grants' (to vary by all operations' grants). | |
| * Calculated cache context ID: 'user.node_grants:%operation', e.g. | |
| * 'user.node_grants:view' (to vary by the view operation's grants). | |
| * | |
| * This allows for node access grants-sensitive caching when listing nodes. | |
| * | |
| * @see node_query_node_access_alter() | |
| * @ingroup node_access | |
| */ | |
| class NodeAccessGrantsCacheContext extends UserCacheContextBase implements CalculatedCacheContextInterface { | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public static function getLabel() { | |
| return t("Content access view grants"); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function getContext($operation = NULL) { | |
| // If the current user either can bypass node access then we don't need to | |
| // determine the exact node grants for the current user. | |
| if ($this->user->hasPermission('bypass node access')) { | |
| return 'all'; | |
| } | |
| // When no specific operation is specified, check the grants for all three | |
| // possible operations. | |
| if ($operation === NULL) { | |
| $result = []; | |
| foreach (['view', 'update', 'delete'] as $op) { | |
| $result[] = $this->checkNodeGrants($op); | |
| } | |
| return implode('-', $result); | |
| } | |
| else { | |
| return $this->checkNodeGrants($operation); | |
| } | |
| } | |
| /** | |
| * Checks the node grants for the given operation. | |
| * | |
| * @param string $operation | |
| * The operation to check the node grants for. | |
| * | |
| * @return string | |
| * The string representation of the cache context. | |
| */ | |
| protected function checkNodeGrants($operation) { | |
| // When checking the grants for the 'view' operation and the current user | |
| // has a global view grant (i.e. a view grant for node ID 0) — note that | |
| // this is automatically the case if no node access modules exist (no | |
| // hook_node_grants() implementations) then we don't need to determine the | |
| // exact node view grants for the current user. | |
| if ($operation === 'view' && node_access_view_all_nodes($this->user)) { | |
| return 'view.all'; | |
| } | |
| $grants = node_access_grants($operation, $this->user); | |
| $grants_context_parts = []; | |
| foreach ($grants as $realm => $gids) { | |
| $grants_context_parts[] = $realm . ':' . implode(',', $gids); | |
| } | |
| return $operation . '.' . implode(';', $grants_context_parts); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function getCacheableMetadata($operation = NULL) { | |
| $cacheable_metadata = new CacheableMetadata(); | |
| if (!\Drupal::moduleHandler()->getImplementations('node_grants')) { | |
| return $cacheable_metadata; | |
| } | |
| // The node grants may change if the user is updated. (The max-age is set to | |
| // zero below, but sites may override this cache context, and change it to a | |
| // non-zero value. In such cases, this cache tag is needed for correctness.) | |
| $cacheable_metadata->setCacheTags(['user:' . $this->user->id()]); | |
| // If the site is using node grants, this cache context can not be | |
| // optimized. | |
| return $cacheable_metadata->setCacheMaxAge(0); | |
| } | |
| } |