function getProximateRacks($rack_id, $proximity = 0)
{
$ret = array($rack_id);
if ($proximity > 0) {
$rack = spotEntity('rack', $rack_id);
$rackList = doubleLink(listCells('rack', $rack['row_id']));
$todo = $proximity;
$cur_item = $rackList[$rack_id];
while ($todo and array_key_exists('prev_key', $cur_item)) {
$cur_item = $rackList[$cur_item['prev_key']];
$ret[] = $cur_item['id'];
$todo--;
}
$todo = $proximity;
$cur_item = $rackList[$rack_id];
while ($todo and array_key_exists('next_key', $cur_item)) {
$cur_item = $rackList[$cur_item['next_key']];
$ret[] = $cur_item['id'];
$todo--;
}
}
return $ret;
}
function getNextIDforRack($row_id, $rack_id)
{
$rackList = listCells('rack', $row_id);
doubleLink($rackList);
if (isset($rackList[$rack_id]['next_key'])) {
return $rackList[$rack_id]['next_key'];
}
return NULL;
}
