public static function newFromVector($vector)
{
if ($vector instanceof PhabricatorQueryOrderVector) {
return clone $vector;
}
if (!is_array($vector)) {
throw new Exception(pht('An order vector can only be constructed from a list of strings or ' . 'another order vector.'));
}
if (!$vector) {
throw new Exception(pht('An order vector must not be empty.'));
}
$items = array();
foreach ($vector as $key => $scalar) {
if (!is_string($scalar)) {
throw new Exception(pht('Value with key "%s" in order vector is not a string (it has ' . 'type "%s"). An order vector must contain only strings.', $key, gettype($scalar)));
}
$item = PhabricatorQueryOrderItem::newFromScalar($scalar);
// Orderings like "id, id, id" or "id, -id" are meaningless and invalid.
if (isset($items[$item->getOrderKey()])) {
throw new Exception(pht('Order vector "%s" specifies order "%s" twice. Each component ' . 'of an ordering must be unique.', implode(', ', $vector), $item->getOrderKey()));
}
$items[$item->getOrderKey()] = $item;
}
$obj = new PhabricatorQueryOrderVector();
$obj->items = $items;
$obj->keys = array_keys($items);
return $obj;
}
public function testQueryOrderItem()
{
$item = PhabricatorQueryOrderItem::newFromScalar('id');
$this->assertEqual('id', $item->getOrderKey());
$this->assertEqual(false, $item->getIsReversed());
$item = PhabricatorQueryOrderItem::newFromScalar('-id');
$this->assertEqual('id', $item->getOrderKey());
$this->assertEqual(true, $item->getIsReversed());
}