protected function moveTo(Model_Ordered $target, $aftertarget = true)
{
if ($aftertarget) {
$above = $target;
$below = $target->getNext();
if (!$below) {
$below = clone $target;
$below->order++;
} else {
if ($below->getId() == $this->getId()) {
return;
}
}
} else {
$above = $target->getPrev();
$below = $target;
if (!$above) {
$above = clone $target;
$above->order--;
} else {
if ($above->getId() == $this->getId()) {
return;
}
}
}
$delta = $below->order - $above->order;
$this->order = $above->order + 1;
$this->_db->update($this->_table, array($this->_order_by_field => $this->order), array($this->_pk => $this->getId()));
if ($delta < 2) {
$update = $above->getNextId(0);
$update = array_diff($update, array($this->getId()));
if ($update) {
$delta = 2 - $delta;
$this->_db->update($this->_table, "{$this->_order_by_field} = {$this->_order_by_field} + {$delta}", array($this->_pk => $update));
}
}
}
