function node_access_acquire_grants

Gets the list of node access grants and writes them to the database.

This function is called when a node is saved, and can also be called by modules if something other than a node save causes node access permissions to change. It collects all node access grants for the node from hook_node_access_records() implementations, allows these grants to be altered via hook_node_access_records_alter() implementations, and saves the collected and altered grants to the database.

Parameters

$node: The $node to acquire grants for.

$delete: Whether to delete existing node access records before inserting new ones. Defaults to TRUE.

Related topics

File

modules/node/node.module, line 3496

Code

function node_access_acquire_grants($node, $delete = TRUE) {
    $grants = module_invoke_all('node_access_records', $node);
    // Let modules alter the grants.
    drupal_alter('node_access_records', $grants, $node);
    // If no grants are set and the node is published, then use the default grant.
    if (empty($grants) && !empty($node->status)) {
        $grants[] = array(
            'realm' => 'all',
            'gid' => 0,
            'grant_view' => 1,
            'grant_update' => 0,
            'grant_delete' => 0,
        );
    }
    else {
        // Retain grants by highest priority.
        $grant_by_priority = array();
        foreach ($grants as $g) {
            $grant_by_priority[intval($g['priority'])][] = $g;
        }
        krsort($grant_by_priority);
        $grants = array_shift($grant_by_priority);
    }
    node_access_write_grants($node, $grants, NULL, $delete);
}