OpenCart 🇺🇦

if (!empty($data['filter_group'])) {
	$group = $data['filter_group'];
} else {
	$group = 'week';
}

switch($group) {
	case 'day';
		$sql = "SELECT COUNT(DISTINCT DAY(date_added)) AS total FROM `" . DB_PREFIX . "order`";
		break;
	default:
	case 'week':
		$sql = "SELECT COUNT(DISTINCT WEEK(date_added)) AS total FROM `" . DB_PREFIX . "order`";
		break;	
	case 'month':
		$sql = "SELECT COUNT(DISTINCT MONTH(date_added)) AS total FROM `" . DB_PREFIX . "order`";
		break;
	case 'year':
		$sql = "SELECT COUNT(DISTINCT YEAR(date_added)) AS total FROM `" . DB_PREFIX . "order`";
		break;									
}

if (!empty($data['filter_order_status_id'])) {
	$sql .= " WHERE order_status_id = '" . (int)$data['filter_order_status_id'] . "'";
} else {
	$sql .= " WHERE order_status_id > '0'";
}
		
if (!empty($data['filter_date_start'])) {
	$sql .= " AND DATE(date_added) >= '" . $this->db->escape($data['filter_date_start']) . "'";
}

if (!empty($data['filter_date_end'])) {
	$sql .= " AND DATE(date_added) <= '" . $this->db->escape($data['filter_date_end']) . "'";
}

$query = $this->db->query($sql);

return $query->row['total'];