/**
* Explain your records in the {node_access} table.
*
* In order to help developers and administrators understand the forces
* that control access to any given node, the DNA module provides the
* Devel Node Access block, which lists all the grant records in the
* {node_access} table for that node.
*
* However, every Node Access module is free in how it defines and uses the
* 'realm' and 'gid' fields in its records in the {node_access} table, and
* it's often difficult to interpret them. This hook passes each record
* that DNA wants to display, and the owning module is expected to return
* an explanation of that record.
*
* The explanation should not be localized (not be passed through t()), so
* that administrators seeking help can present English explanations.
*
* @param $row
* The record from the {node_access} table, as object. The member fields are:
* nid, gid, realm, grant_view, grant_update, grant_delete.
*
* @return
* A string with a (short!) explanation of the given {node_access} row,
* to be displayed in DNA's 'Devel Node Access' block. It will be displayed
* as HTML; any variable parts must already be sanitized.
*
* @see hook_node_access_records()
* @see devel_node_access_node_access_explain()
*
* @ingroup node_access
*/
function hook_node_access_explain($row)
{
if ($row->realm == 'mymodule_myrealm') {
if ($row->grant_view) {
$name = db_result(db_query('SELECT name FROM {role} WHERE rid = %d', $row->gid));
return 'Role ' . theme_placeholder($name) . ' may view this node.';
} else {
return 'No access.';
}
}
}
function theme_strong($txt)
{
return '<strong>' . theme_placeholder($txt) . '</strong>';
}