/**
* Move a step up or down.
*
* @param int $id The step to move.
*/
protected function move_step($id)
{
require_sesskey();
$direction = required_param('direction', PARAM_INT);
$step = step::instance($id);
$currentsortorder = $step->get_sortorder();
$targetsortorder = $currentsortorder + $direction;
$tour = $step->get_tour();
$swapwith = helper::get_step_from_sortorder($tour->get_id(), $targetsortorder);
// Set the sort order to something out of the way.
$step->set_sortorder(-1);
$step->persist();
// Swap the two sort orders.
$swapwith->set_sortorder($currentsortorder);
$swapwith->persist();
$step->set_sortorder($targetsortorder);
$step->persist();
// Reset the sort order.
$tour->reset_step_sortorder();
redirect($tour->get_view_link());
}
