/**
* @return string
*/
protected function prepareSalesChart()
{
$tooltip = null !== $this->jsTooltip ? $this->jsTooltip : Yii::t('app', 'Your sales for <b>{date}</b> was <span>{price} {code}</span>', ['date' => '%x', 'price' => '%y', 'code' => CurrencyHelper::getCurrencySymbol($this->currency)]);
$shops = $this->getOrderSalesChart(Yii::$app->db, $this->currency);
$periodTotalSold = $shops['totalSum'];
$shops = [['label' => Yii::t('app', 'Main shop'), 'data' => $shops['orders']]];
$header = Yii::t('app', 'Last {period} sold for:', ['period' => Yii::t('app', $this->period)]) . ' ' . $this->currency->format($periodTotalSold);
$data = ['tooltip' => $tooltip, 'header' => $header, 'dateFormat' => $this->dateFormat, 'shops' => $shops];
return $data;
}
