YetiForceCompany/YetiForceCRM

<?php
/**
 * Calculations handler.
 *
 * @package Handler
 *
 * @copyright YetiForce S.A.
 * @license YetiForce Public License 6.5 (licenses/LicenseEN.txt or yetiforce.com)
 * @author Radosław Skrzypczak <r.skrzypczak@yetiforce.com>
 */
class Products_Calculations_Handler
{
    /**
     * EntityBeforeSave handler function.
     *
     * @param App\EventHandler $eventHandler
     */
    public function entityBeforeSave(App\EventHandler $eventHandler)
    {
        $recordModel = $eventHandler->getRecordModel();
        $resultField = \App\Config::module($eventHandler->getModuleName(), 'CALCULATION_FIELD', 'commissionrate');
        if ($resultField && ($purchaseField = $recordModel->getField('purchase')) && $purchaseField->isActiveField()
            && ($marginField = $recordModel->getField('commissionrate')) && $marginField->isActiveField()
            && ($unitPriceField = $recordModel->getField('unit_price')) && $unitPriceField->isActiveField()) {
            $uiTypeModel = $unitPriceField->getName() === $resultField ? $purchaseField->getUITypeModel() : $unitPriceField->getUITypeModel();
            $value = $recordModel->get($uiTypeModel->getFieldModel()->getName());
            $currencyId = $uiTypeModel->getBaseCurrency($value) ?? \App\Fields\Currency::getDefault()['id'];
            $value = (float) $uiTypeModel->getValueForCurrency($value, $currencyId);

            switch ($resultField) {
                case $unitPriceField->getName():
                    $value = $this->getValueField($currencyId, $value, null, (float) $recordModel->get($marginField->getName()));
                    break;
                case $marginField->getName():
                    $purchaseValue = $purchaseField->getUITypeModel()->getValueForCurrency($recordModel->get($purchaseField->getName()) ?? '', $currencyId);
                    $value = $this->getValueField($currencyId, (float) $purchaseValue, $value);
                    break;
                case $purchaseField->getName():
                    $value = $this->getValueField($currencyId, null, $value, (float) $recordModel->get($marginField->getName()));
                    break;
                default:
                    break;
            }
            $recordModel->set($resultField, $value);
        }
    }

    /**
     * Calculation.
     *
     * @param int        $currencyId
     * @param float|null $purchase
     * @param float|null $unitPrice
     * @param float|null $margin
     *
     * @return float|string
     */
    private function getValueField(int $currencyId, ?float $purchase = null, ?float $unitPrice = null, ?float $margin = null)
    {
        if (null === $margin) {
            $value = empty($purchase) ? 0 : round(100 * ($unitPrice - $purchase) / $purchase, 3);
        } else {
            if (null === $unitPrice) {
                $value = empty($purchase) ? 0 : ($margin / 100) * $purchase + $purchase;
            } else {
                $value = empty($unitPrice) ? 0 : ($unitPrice * 100) / ($margin + 1);
            }
            $value = \App\Json::encode(['currencies' => [$currencyId => ['price' => $value]], 'currencyId' => $currencyId]);
        }
        return $value;
    }
}