public function getSalesJson($fromDate, $toDate, $interval)
{
$result = array();
$result[] = array('Year', 'Sales');
if ($interval == 'days') {
$interval2 = '+1 day';
} elseif ($interval == 'months') {
$interval2 = '+1 month';
} elseif ($interval == 'years') {
$interval2 = '+1 year';
}
foreach ($this->invoiceService->getDateRange($fromDate, $toDate, $interval2) as $date) {
$result[] = array($date, $this->entityManager->getRepository(Invoice::getClass())->getAmountByStringDate($date, $interval));
}
return $result;
}
