Added the SimpleTaxDeduction adjuster

Changelog.md

@@ -17,6 +17,7 @@
 - Removed the Vanilo v2 `Framework` namespace compatibility layer
 - Removed the throwing of `CartUpdated` event when destroying a cart (`CartDeleting` and `CartDeleted` remains)
 - Removed the deprecated `BuyableImageSpatieV7` and `BuyableImageSpatieV8` traits
+- Added the `SimpleTaxDeduction` adjuster
 - Added Cart item configuration support (different configurations constitute separate cart items) to the `Cart::addItem()` method
 - Added the `currency` field to the orders table
 - Added the following fields to the Channel model/table:

src/Adjustments/Adjusters/SimpleTaxDeduction.php

@@ -0,0 +1,81 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Contains the SimpleTaxDeduction class.
+ *
+ * @copyright Copyright (c) 2024 Vanilo UG
+ * @author Attila Fulop
+ * @license MIT
+ * @since 2024-04-03
+ *
+ */
+
+namespace Vanilo\Adjustments\Adjusters;
+
+use Vanilo\Adjustments\Contracts\Adjustable;
+use Vanilo\Adjustments\Contracts\Adjuster;
+use Vanilo\Adjustments\Contracts\Adjustment;
+use Vanilo\Adjustments\Models\AdjustmentProxy;
+use Vanilo\Adjustments\Models\AdjustmentTypeProxy;
+use Vanilo\Adjustments\Support\HasWriteableTitleAndDescription;
+use Vanilo\Adjustments\Support\IsLockable;
+
+final class SimpleTaxDeduction implements Adjuster
+{
+ use HasWriteableTitleAndDescription;
+ use IsLockable;
+
+ public function __construct(
+ private float $rate,
+ private bool $isIncluded = false,
+ ) {
+ }
+
+ public static function reproduceFromAdjustment(Adjustment $adjustment): Adjuster
+ {
+ $data = $adjustment->getData();
+
+ return new self(floatval($data['rate'] ?? 0));
+ }
+
+ public function createAdjustment(Adjustable $adjustable): Adjustment
+ {
+ $adjustmentClass = AdjustmentProxy::modelClass();
+
+ return new $adjustmentClass($this->getModelAttributes($adjustable));
+ }
+
+ public function recalculate(Adjustment $adjustment, Adjustable $adjustable): Adjustment
+ {
+ $adjustment->setAmount($this->calculateTaxAmount($adjustable));
+
+ return $adjustment;
+ }
+
+ public function isIncluded(): bool
+ {
+ return $this->isIncluded;
+ }
+
+ private function calculateTaxAmount(Adjustable $adjustable): float
+ {
+ return -1 * $adjustable->preAdjustmentTotal() * $this->rate / 100;
+ }
+
+ private function getModelAttributes(Adjustable $adjustable): array
+ {
+ return [
+ 'type' => AdjustmentTypeProxy::TAX(),
+ 'adjuster' => self::class,
+ 'origin' => null,
+ 'title' => $this->getTitle(),
+ 'description' => $this->getDescription(),
+ 'data' => ['rate' => $this->rate],
+ 'amount' => $this->calculateTaxAmount($adjustable),
+ 'is_locked' => $this->isLocked(),
+ 'is_included' => $this->isIncluded(),
+ ];
+ }
+}

src/Adjustments/Changelog.md

@@ -12,6 +12,7 @@
 - Added Laravel 11 Support
 - Changed minimum Laravel version to v10.38.2
 - Changed minimal Enum requirement to v4.2
+- Added the `SimpleTaxDeduction` adjuster
 - Added the `AdjusterAliases` class that for decoupling FQCNs from the database
 - Added automatic mapping of adjuster FQCN <-> aliases when saving an adjustment into the DB and when calling the `getAdjuster()` method
 - Added the `mapInto()` method to the `RelationAdjustmentCollection` class, which forwards the call to the underlying Eloquent collection