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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** @license For full copyright and license information, please see the LICENSE.md file. */ |
| 6 | |
| 7 | namespace App\Modules\Tax\Domain\Service\Calculator; |
| 8 | |
| 9 | defined('AMMONLY_APP') || exit('Direct script access is forbidden.'); |
| 10 | |
| 11 | use App\Modules\Tax\Domain\Model\TaxRate; |
| 12 | use App\Modules\Tax\Domain\ValueObject\LineTaxResult; |
| 13 | use App\Modules\Tax\Domain\ValueObject\RoundingMethod; |
| 14 | |
| 15 | /** |
| 16 | * Calculator for Margin Scheme VAT (Special scheme: Tax is calculated only on positive gross margin). |
| 17 | */ |
| 18 | final readonly class MarginVatCalculator extends AbstractTaxCalculator |
| 19 | { |
| 20 | private const string DEFAULT_MARGIN_CLAUSE = 'Special scheme - Margin procedure'; |
| 21 | |
| 22 | /** |
| 23 | * @inheritDoc |
| 24 | */ |
| 25 | public function calculate( |
| 26 | float $unitPrice, |
| 27 | float $quantity, |
| 28 | float $discountAmount, |
| 29 | TaxRate $taxRate, |
| 30 | RoundingMethod $roundingMethod, |
| 31 | ?float $costPrice = null, |
| 32 | ): LineTaxResult { |
| 33 | $sellingTotal = $this->calculateBaseAmount($unitPrice, $quantity, $discountAmount, $roundingMethod); |
| 34 | $totalCost = ($costPrice !== null) ? $roundingMethod->round($costPrice * $quantity, 2) : 0.0; |
| 35 | $marginGross = max(0.0, $sellingTotal - $totalCost); |
| 36 | |
| 37 | if ($marginGross <= 0.0 || !$this->isStandardTaxableRate($taxRate)) { |
| 38 | return $this->buildZeroTaxResult($taxRate, $sellingTotal, self::DEFAULT_MARGIN_CLAUSE); |
| 39 | } |
| 40 | |
| 41 | $divisor = 1.0 + ($taxRate->ratePercent / 100.0); |
| 42 | $marginNet = $roundingMethod->round($marginGross / $divisor, 2); |
| 43 | $taxOnMargin = $roundingMethod->round($marginGross - $marginNet, 2); |
| 44 | $effectiveNet = $roundingMethod->round($sellingTotal - $taxOnMargin, 2); |
| 45 | |
| 46 | return $this->buildResult( |
| 47 | taxRate: $taxRate, |
| 48 | netAmount: $effectiveNet, |
| 49 | taxAmount: $taxOnMargin, |
| 50 | grossAmount: $sellingTotal, |
| 51 | whtAmount: 0.0, |
| 52 | defaultLegalClause: self::DEFAULT_MARGIN_CLAUSE |
| 53 | ); |
| 54 | } |
| 55 | } |