27-05-2026 Update DHL Modul v2.0

app/Services/DhlShipmentWeightCalculator.php

@@ -0,0 +1,89 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\ShoppingOrder;
+use InvalidArgumentException;
+
+class DhlShipmentWeightCalculator
+{
+    public const DEFAULT_WEIGHT_KG = 1.0;
+
+    public const DEFAULT_MAX_WEIGHT_KG = 31.5;
+
+    public const PRODUCT_MAX_WEIGHTS_KG = [
+        'V01PAK' => 31.5,
+        'V53PAK' => 31.5,
+        'V62KP' => 1.0,
+    ];
+
+    public function calculate(ShoppingOrder $order): float
+    {
+        $this->loadOrderItems($order);
+
+        $baseWeightGrams = max((int) ($order->weight ?? 0), 0);
+        $compensationWeightGrams = $this->calculateCompensationWeightGrams($order);
+        $totalWeightGrams = $baseWeightGrams + $compensationWeightGrams;
+
+        if ($totalWeightGrams <= 0) {
+            return self::DEFAULT_WEIGHT_KG;
+        }
+
+        return $this->roundWeightKg($totalWeightGrams / 1000);
+    }
+
+    public function getMaxWeightKgForProduct(?string $productCode): float
+    {
+        $productCode = strtoupper(trim((string) $productCode));
+
+        return self::PRODUCT_MAX_WEIGHTS_KG[$productCode] ?? self::DEFAULT_MAX_WEIGHT_KG;
+    }
+
+    public function assertWithinProductLimit(float $weightKg, ?string $productCode): void
+    {
+        $maxWeightKg = $this->getMaxWeightKgForProduct($productCode);
+
+        if ($weightKg > $maxWeightKg) {
+            throw new InvalidArgumentException(sprintf(
+                'Gewicht %.3f kg ueberschreitet das DHL-Maximalgewicht fuer %s (%.1f kg).',
+                $weightKg,
+                $productCode ?: 'das gewaehlte Produkt',
+                $maxWeightKg
+            ));
+        }
+    }
+
+    private function calculateCompensationWeightGrams(ShoppingOrder $order): int
+    {
+        $items = $order->shopping_order_items ?? collect();
+        $weightGrams = 0;
+
+        foreach ($items as $item) {
+            if ((int) ($item->comp ?? 0) <= 0) {
+                continue;
+            }
+
+            $productWeight = (int) ($item->product?->weight ?? 0);
+            if ($productWeight <= 0) {
+                continue;
+            }
+
+            $quantity = max((int) ($item->qty ?? 1), 1);
+            $weightGrams += $productWeight * $quantity;
+        }
+
+        return $weightGrams;
+    }
+
+    private function roundWeightKg(float $weightKg): float
+    {
+        return round(max($weightKg, 0.1), 3);
+    }
+
+    private function loadOrderItems(ShoppingOrder $order): void
+    {
+        if ($order->exists && ! $order->relationLoaded('shopping_order_items')) {
+            $order->loadMissing('shopping_order_items.product');
+        }
+    }
+}