--- /dev/null
+<?php
+
+namespace Drupal\node;
+
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Database\Connection;
+use Drupal\Core\Database\Query\SelectInterface;
+use Drupal\Core\Database\Query\Condition;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Language\LanguageManagerInterface;
+use Drupal\Core\Session\AccountInterface;
+
+/**
+ * Defines a storage handler class that handles the node grants system.
+ *
+ * This is used to build node query access.
+ *
+ * @ingroup node_access
+ */
+class NodeGrantDatabaseStorage implements NodeGrantDatabaseStorageInterface {
+
+ /**
+ * The database connection.
+ *
+ * @var \Drupal\Core\Database\Connection
+ */
+ protected $database;
+
+ /**
+ * The module handler.
+ *
+ * @var \Drupal\Core\Extension\ModuleHandlerInterface
+ */
+ protected $moduleHandler;
+
+ /**
+ * The language manager.
+ *
+ * @var \Drupal\Core\Language\LanguageManagerInterface
+ */
+ protected $languageManager;
+
+ /**
+ * Constructs a NodeGrantDatabaseStorage object.
+ *
+ * @param \Drupal\Core\Database\Connection $database
+ * The database connection.
+ * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+ * The module handler.
+ * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
+ * The language manager.
+ */
+ public function __construct(Connection $database, ModuleHandlerInterface $module_handler, LanguageManagerInterface $language_manager) {
+ $this->database = $database;
+ $this->moduleHandler = $module_handler;
+ $this->languageManager = $language_manager;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function access(NodeInterface $node, $operation, AccountInterface $account) {
+ // Grants only support these operations.
+ if (!in_array($operation, ['view', 'update', 'delete'])) {
+ return AccessResult::neutral();
+ }
+
+ // If no module implements the hook or the node does not have an id there is
+ // no point in querying the database for access grants.
+ if (!$this->moduleHandler->getImplementations('node_grants') || !$node->id()) {
+ // Return the equivalent of the default grant, defined by
+ // self::writeDefault().
+ if ($operation === 'view') {
+ return AccessResult::allowedIf($node->isPublished())->addCacheableDependency($node);
+ }
+ else {
+ return AccessResult::neutral();
+ }
+ }
+
+ // Check the database for potential access grants.
+ $query = $this->database->select('node_access');
+ $query->addExpression('1');
+ // Only interested for granting in the current operation.
+ $query->condition('grant_' . $operation, 1, '>=');
+ // Check for grants for this node and the correct langcode.
+ $nids = $query->andConditionGroup()
+ ->condition('nid', $node->id())
+ ->condition('langcode', $node->language()->getId());
+ // If the node is published, also take the default grant into account. The
+ // default is saved with a node ID of 0.
+ $status = $node->isPublished();
+ if ($status) {
+ $nids = $query->orConditionGroup()
+ ->condition($nids)
+ ->condition('nid', 0);
+ }
+ $query->condition($nids);
+ $query->range(0, 1);
+
+ $grants = static::buildGrantsQueryCondition(node_access_grants($operation, $account));
+
+ if (count($grants) > 0) {
+ $query->condition($grants);
+ }
+
+ // Only the 'view' node grant can currently be cached; the others currently
+ // don't have any cacheability metadata. Hopefully, we can add that in the
+ // future, which would allow this access check result to be cacheable in all
+ // cases. For now, this must remain marked as uncacheable, even when it is
+ // theoretically cacheable, because we don't have the necessary metadata to
+ // know it for a fact.
+ $set_cacheability = function (AccessResult $access_result) use ($operation) {
+ $access_result->addCacheContexts(['user.node_grants:' . $operation]);
+ if ($operation !== 'view') {
+ $access_result->setCacheMaxAge(0);
+ }
+ return $access_result;
+ };
+
+ if ($query->execute()->fetchField()) {
+ return $set_cacheability(AccessResult::allowed());
+ }
+ else {
+ return $set_cacheability(AccessResult::neutral());
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function checkAll(AccountInterface $account) {
+ $query = $this->database->select('node_access');
+ $query->addExpression('COUNT(*)');
+ $query
+ ->condition('nid', 0)
+ ->condition('grant_view', 1, '>=');
+
+ $grants = static::buildGrantsQueryCondition(node_access_grants('view', $account));
+
+ if (count($grants) > 0 ) {
+ $query->condition($grants);
+ }
+ return $query->execute()->fetchField();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function alterQuery($query, array $tables, $op, AccountInterface $account, $base_table) {
+ if (!$langcode = $query->getMetaData('langcode')) {
+ $langcode = FALSE;
+ }
+
+ // Find all instances of the base table being joined -- could appear
+ // more than once in the query, and could be aliased. Join each one to
+ // the node_access table.
+ $grants = node_access_grants($op, $account);
+ foreach ($tables as $nalias => $tableinfo) {
+ $table = $tableinfo['table'];
+ if (!($table instanceof SelectInterface) && $table == $base_table) {
+ // Set the subquery.
+ $subquery = $this->database->select('node_access', 'na')
+ ->fields('na', ['nid']);
+
+ // If any grant exists for the specified user, then user has access to the
+ // node for the specified operation.
+ $grant_conditions = static::buildGrantsQueryCondition($grants);
+
+ // Attach conditions to the subquery for nodes.
+ if (count($grant_conditions->conditions())) {
+ $subquery->condition($grant_conditions);
+ }
+ $subquery->condition('na.grant_' . $op, 1, '>=');
+
+ // Add langcode-based filtering if this is a multilingual site.
+ if (\Drupal::languageManager()->isMultilingual()) {
+ // If no specific langcode to check for is given, use the grant entry
+ // which is set as a fallback.
+ // If a specific langcode is given, use the grant entry for it.
+ if ($langcode === FALSE) {
+ $subquery->condition('na.fallback', 1, '=');
+ }
+ else {
+ $subquery->condition('na.langcode', $langcode, '=');
+ }
+ }
+
+ $field = 'nid';
+ // Now handle entities.
+ $subquery->where("$nalias.$field = na.nid");
+
+ $query->exists($subquery);
+ }
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function write(NodeInterface $node, array $grants, $realm = NULL, $delete = TRUE) {
+ if ($delete) {
+ $query = $this->database->delete('node_access')->condition('nid', $node->id());
+ if ($realm) {
+ $query->condition('realm', [$realm, 'all'], 'IN');
+ }
+ $query->execute();
+ }
+ // Only perform work when node_access modules are active.
+ if (!empty($grants) && count($this->moduleHandler->getImplementations('node_grants'))) {
+ $query = $this->database->insert('node_access')->fields(['nid', 'langcode', 'fallback', 'realm', 'gid', 'grant_view', 'grant_update', 'grant_delete']);
+ // If we have defined a granted langcode, use it. But if not, add a grant
+ // for every language this node is translated to.
+ foreach ($grants as $grant) {
+ if ($realm && $realm != $grant['realm']) {
+ continue;
+ }
+ if (isset($grant['langcode'])) {
+ $grant_languages = [$grant['langcode'] => $this->languageManager->getLanguage($grant['langcode'])];
+ }
+ else {
+ $grant_languages = $node->getTranslationLanguages(TRUE);
+ }
+ foreach ($grant_languages as $grant_langcode => $grant_language) {
+ // Only write grants; denies are implicit.
+ if ($grant['grant_view'] || $grant['grant_update'] || $grant['grant_delete']) {
+ $grant['nid'] = $node->id();
+ $grant['langcode'] = $grant_langcode;
+ // The record with the original langcode is used as the fallback.
+ if ($grant['langcode'] == $node->language()->getId()) {
+ $grant['fallback'] = 1;
+ }
+ else {
+ $grant['fallback'] = 0;
+ }
+ $query->values($grant);
+ }
+ }
+ }
+ $query->execute();
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function delete() {
+ $this->database->truncate('node_access')->execute();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function writeDefault() {
+ $this->database->insert('node_access')
+ ->fields([
+ 'nid' => 0,
+ 'realm' => 'all',
+ 'gid' => 0,
+ 'grant_view' => 1,
+ 'grant_update' => 0,
+ 'grant_delete' => 0,
+ ])
+ ->execute();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function count() {
+ return $this->database->query('SELECT COUNT(*) FROM {node_access}')->fetchField();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function deleteNodeRecords(array $nids) {
+ $this->database->delete('node_access')
+ ->condition('nid', $nids, 'IN')
+ ->execute();
+ }
+
+ /**
+ * Creates a query condition from an array of node access grants.
+ *
+ * @param array $node_access_grants
+ * An array of grants, as returned by node_access_grants().
+ * @return \Drupal\Core\Database\Query\Condition
+ * A condition object to be passed to $query->condition().
+ *
+ * @see node_access_grants()
+ */
+ protected static function buildGrantsQueryCondition(array $node_access_grants) {
+ $grants = new Condition("OR");
+ foreach ($node_access_grants as $realm => $gids) {
+ if (!empty($gids)) {
+ $and = new Condition('AND');
+ $grants->condition($and
+ ->condition('gid', $gids, 'IN')
+ ->condition('realm', $realm)
+ );
+ }
+ }
+
+ return $grants;
+ }
+
+}
projects / yaffs-website / blobdiff