move into sonardesk

Commerce/Services/DatabaseInventoryProvider.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Modules\Commerce\Services;
+
+use Illuminate\Support\Facades\DB;
+use Modules\Commerce\Contracts\InventoryProvider;
+use Modules\Commerce\Models\InventoryMovement;
+use Modules\Commerce\Models\Product;
+
+final class DatabaseInventoryProvider implements InventoryProvider
+{
+    public function adjust(Product $product, int $quantity, string $reason, ?int $userId = null): void
+    {
+        DB::transaction(function () use ($product, $quantity, $reason, $userId) {
+            $product->increment('stock_quantity', $quantity);
+            InventoryMovement::create(['product_id' => $product->id, 'quantity' => $quantity, 'reason' => $reason, 'created_by' => $userId]);
+        });
+    }
+
+    public function available(Product $product): int
+    {
+        return max(0, (int) $product->stock_quantity);
+    }
+}