/**
* generate unique number
*
* @param model of sale
* @return unique_number
*/
public function generateUniqueNumber($sale)
{
if (!is_null($sale['unique_number'])) {
$i = 0;
$amount = true;
while ($amount) {
$prev_number = Sale::orderBy('id', 'DESC')->status('wait')->first();
$limit = StoreSetting::type('limit_unique_number')->ondate('now')->first();
if ($prev_number['unique_number'] < $limit['value']) {
$unique_number = $i + $prev_number['unique_number'] + 1;
} else {
$unique_number = $i + 1;
}
$amount = Sale::amount($sale->amount - $unique_number)->status('wait')->notid($sale->id)->first();
$i = $i + 1;
}
return $unique_number;
} else {
return $sale['unique_number'];
}
}