feat(integration): 實作並測試 POS 與販賣機訂單同步 API

主要變更：
- 實作 POS 與販賣機訂單同步邏輯，支援多租戶與 Sanctum 驗證。
- 修正多租戶識別中間件與 Sanctum 驗證順序問題。
- 切換快取驅動至 Redis 以支援 Tenancy 標籤功能。
- 新增商品同步 API (Upsert) 及相關單元測試。
- 新增手動測試腳本 tests/manual/test_integration_api.sh。
- 前端新增銷售訂單來源篩選與欄位顯示。

app/Modules/Integration/Actions/SyncOrderAction.php

@@ -0,0 +1,156 @@
+<?php
+
+namespace App\Modules\Integration\Actions;
+
+use App\Modules\Integration\Models\SalesOrder;
+use App\Modules\Integration\Models\SalesOrderItem;
+use App\Modules\Inventory\Contracts\InventoryServiceInterface;
+use App\Modules\Inventory\Contracts\ProductServiceInterface;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Log;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Validation\ValidationException;
+
+class SyncOrderAction
+{
+    protected $inventoryService;
+    protected $productService;
+
+    public function __construct(
+        InventoryServiceInterface $inventoryService,
+        ProductServiceInterface $productService
+    ) {
+        $this->inventoryService = $inventoryService;
+        $this->productService = $productService;
+    }
+
+    /**
+     * 執行訂單同步
+     *
+     * @param array $data
+     * @return array 包含 orders 建立結果的資訊
+     * @throws ValidationException
+     * @throws \Exception
+     */
+    public function execute(array $data)
+    {
+        $externalOrderId = $data['external_order_id'];
+
+        // 使用 Cache::lock 防護高併發，鎖定該訂單號 10 秒
+        // 此處需要 cache store 支援鎖 (如 memcached, dynamodb, redis, database, file, array)
+        // Laravel 預設的 file/redis 都支援。若無法取得鎖，表示有另一個相同的請求正在處理
+        $lock = Cache::lock("sync_order_{$externalOrderId}", 10);
+
+        if (!$lock->get()) {
+            throw ValidationException::withMessages([
+                'external_order_id' => ["The order {$externalOrderId} is currently being processed by another transaction. Please try again later."]
+            ]);
+        }
+
+        try {
+            // 冪等性處理：若訂單已存在，回傳已建立的訂單資訊
+            $existingOrder = SalesOrder::where('external_order_id', $externalOrderId)->first();
+            if ($existingOrder) {
+                return [
+                    'status' => 'exists',
+                    'message' => 'Order already exists',
+                    'order_id' => $existingOrder->id,
+                ];
+            }
+
+            // --- 預檢 (Pre-flight check) N+1 優化 ---
+            $items = $data['items'];
+            $posProductIds = array_column($items, 'pos_product_id');
+            
+            // 一次性查出所有相關的 Product
+            $products = $this->productService->findByExternalPosIds($posProductIds)->keyBy('external_pos_id');
+            
+            $missingIds = [];
+            foreach ($posProductIds as $id) {
+                if (!$products->has($id)) {
+                    $missingIds[] = $id;
+                }
+            }
+
+            if (!empty($missingIds)) {
+                // 回報所有缺漏的 ID
+                throw ValidationException::withMessages([
+                    'items' => ["The following products are not found: " . implode(', ', $missingIds) . ". Please sync products first."]
+                ]);
+            }
+
+            // --- 執行寫入交易 ---
+            $result = DB::transaction(function () use ($data, $items, $products) {
+                // 1. 建立訂單
+                $order = SalesOrder::create([
+                    'external_order_id' => $data['external_order_id'],
+                    'status' => 'completed',
+                    'payment_method' => $data['payment_method'] ?? 'cash',
+                    'total_amount' => 0,
+                    'sold_at' => $data['sold_at'] ?? now(),
+                    'raw_payload' => $data,
+                    'source' => $data['source'] ?? 'pos',
+                    'source_label' => $data['source_label'] ?? null,
+                ]);
+
+                // 2. 查找或建立倉庫
+                $warehouseId = $data['warehouse_id'] ?? null;
+
+                if (empty($warehouseId)) {
+                    $warehouseName = $data['warehouse'] ?? '銷售倉庫';
+                    $warehouse = $this->inventoryService->findOrCreateWarehouseByName($warehouseName);
+                    $warehouseId = $warehouse->id;
+                }
+
+                $totalAmount = 0;
+
+                // 3. 處理訂單明細
+                $orderItemsData = [];
+                foreach ($items as $itemData) {
+                    $product = $products->get($itemData['pos_product_id']);
+                    
+                    $qty = $itemData['qty'];
+                    $price = $itemData['price'];
+                    $lineTotal = $qty * $price;
+                    $totalAmount += $lineTotal;
+
+                    $orderItemsData[] = [
+                        'sales_order_id' => $order->id,
+                        'product_id' => $product->id,
+                        'product_name' => $product->name,
+                        'quantity' => $qty,
+                        'price' => $price,
+                        'total' => $lineTotal,
+                        'created_at' => now(),
+                        'updated_at' => now(),
+                    ];
+
+                    // 4. 扣除庫存（強制模式，允許負庫存）
+                    $this->inventoryService->decreaseStock(
+                        $product->id,
+                        $warehouseId,
+                        $qty,
+                        "POS Order: " . $order->external_order_id,
+                        true
+                    );
+                }
+
+                // Batch insert order items
+                SalesOrderItem::insert($orderItemsData);
+
+                $order->update(['total_amount' => $totalAmount]);
+
+                return [
+                    'status' => 'created',
+                    'message' => 'Order synced and stock deducted successfully',
+                    'order_id' => $order->id,
+                ];
+            });
+
+            return $result;
+        } finally {
+            // 無論成功失敗，最後釋放鎖定
+            $lock->release();
+        }
+    }
+}

app/Modules/Integration/Actions/SyncVendingOrderAction.php

@@ -0,0 +1,152 @@
+<?php
+
+namespace App\Modules\Integration\Actions;
+
+use App\Modules\Integration\Models\SalesOrder;
+use App\Modules\Integration\Models\SalesOrderItem;
+use App\Modules\Inventory\Contracts\InventoryServiceInterface;
+use App\Modules\Inventory\Contracts\ProductServiceInterface;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Log;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Validation\ValidationException;
+
+class SyncVendingOrderAction
+{
+    protected $inventoryService;
+    protected $productService;
+
+    public function __construct(
+        InventoryServiceInterface $inventoryService,
+        ProductServiceInterface $productService
+    ) {
+        $this->inventoryService = $inventoryService;
+        $this->productService = $productService;
+    }
+
+    /**
+     * 執行販賣機訂單同步
+     *
+     * @param array $data
+     * @return array 包含訂單建立結果的資訊
+     * @throws ValidationException
+     * @throws \Exception
+     */
+    public function execute(array $data)
+    {
+        $externalOrderId = $data['external_order_id'];
+
+        // 使用 Cache::lock 防護高併發
+        $lock = Cache::lock("sync_order_{$externalOrderId}", 10);
+
+        if (!$lock->get()) {
+            throw ValidationException::withMessages([
+                'external_order_id' => ["The order {$externalOrderId} is currently being processed by another transaction. Please try again later."]
+            ]);
+        }
+
+        try {
+            // 冪等性處理：若訂單已存在，回傳已建立的訂單資訊
+            $existingOrder = SalesOrder::where('external_order_id', $externalOrderId)->first();
+            if ($existingOrder) {
+                return [
+                    'status' => 'exists',
+                    'message' => 'Order already exists',
+                    'order_id' => $existingOrder->id,
+                ];
+            }
+
+            // --- 預檢：以 ERP 商品代碼查詢 ---
+            $items = $data['items'];
+            $productCodes = array_column($items, 'product_code');
+
+            // 一次性查出所有相關的 Product（以 code 查詢）
+            $products = $this->productService->findByCodes($productCodes)->keyBy('code');
+
+            $missingCodes = [];
+            foreach ($productCodes as $code) {
+                if (!$products->has($code)) {
+                    $missingCodes[] = $code;
+                }
+            }
+
+            if (!empty($missingCodes)) {
+                throw ValidationException::withMessages([
+                    'items' => ["The following products are not found by code: " . implode(', ', $missingCodes) . ". Please ensure these products exist in the system."]
+                ]);
+            }
+
+            // --- 執行寫入交易 ---
+            $result = DB::transaction(function () use ($data, $items, $products) {
+                // 1. 建立訂單
+                $order = SalesOrder::create([
+                    'external_order_id' => $data['external_order_id'],
+                    'status' => 'completed',
+                    'payment_method' => $data['payment_method'] ?? 'electronic',
+                    'total_amount' => 0,
+                    'sold_at' => $data['sold_at'] ?? now(),
+                    'raw_payload' => $data,
+                    'source' => 'vending',
+                    'source_label' => $data['machine_id'] ?? null,
+                ]);
+
+                // 2. 查找或建立倉庫
+                $warehouseId = $data['warehouse_id'] ?? null;
+
+                if (empty($warehouseId)) {
+                    $warehouseName = $data['warehouse'] ?? '販賣機倉庫';
+                    $warehouse = $this->inventoryService->findOrCreateWarehouseByName($warehouseName);
+                    $warehouseId = $warehouse->id;
+                }
+
+                $totalAmount = 0;
+
+                // 3. 處理訂單明細
+                $orderItemsData = [];
+                foreach ($items as $itemData) {
+                    $product = $products->get($itemData['product_code']);
+
+                    $qty = $itemData['qty'];
+                    $price = $itemData['price'];
+                    $lineTotal = $qty * $price;
+                    $totalAmount += $lineTotal;
+
+                    $orderItemsData[] = [
+                        'sales_order_id' => $order->id,
+                        'product_id' => $product->id,
+                        'product_name' => $product->name,
+                        'quantity' => $qty,
+                        'price' => $price,
+                        'total' => $lineTotal,
+                        'created_at' => now(),
+                        'updated_at' => now(),
+                    ];
+
+                    // 4. 扣除庫存（強制模式，允許負庫存）
+                    $this->inventoryService->decreaseStock(
+                        $product->id,
+                        $warehouseId,
+                        $qty,
+                        "Vending Order: " . $order->external_order_id,
+                        true
+                    );
+                }
+
+                // Batch insert order items
+                SalesOrderItem::insert($orderItemsData);
+
+                $order->update(['total_amount' => $totalAmount]);
+
+                return [
+                    'status' => 'created',
+                    'message' => 'Vending order synced and stock deducted successfully',
+                    'order_id' => $order->id,
+                ];
+            });
+
+            return $result;
+        } finally {
+            $lock->release();
+        }
+    }
+}

app/Modules/Integration/Controllers/OrderSyncController.php

@@ -3,120 +3,58 @@
 namespace App\Modules\Integration\Controllers;
 
 use App\Http\Controllers\Controller;
-use Illuminate\Http\Request;
-use App\Modules\Integration\Models\SalesOrder;
-use App\Modules\Integration\Models\SalesOrderItem;
-use App\Modules\Inventory\Contracts\InventoryServiceInterface;
-use App\Modules\Inventory\Contracts\ProductServiceInterface;
-use Illuminate\Support\Facades\DB;
+use App\Modules\Integration\Requests\SyncOrderRequest;
+use App\Modules\Integration\Actions\SyncOrderAction;
+use Illuminate\Http\JsonResponse;
 use Illuminate\Support\Facades\Log;
 
 class OrderSyncController extends Controller
 {
-    protected $inventoryService;
-    protected $productService;
+    protected $syncOrderAction;
 
-    public function __construct(
-        InventoryServiceInterface $inventoryService,
-        ProductServiceInterface $productService
-    ) {
-        $this->inventoryService = $inventoryService;
-        $this->productService = $productService;
+    public function __construct(SyncOrderAction $syncOrderAction)
+    {
+        $this->syncOrderAction = $syncOrderAction;
     }
 
-    public function store(Request $request)
+    /**
+     * 接收並同步外部交易訂單
+     *
+     * @param SyncOrderRequest $request
+     * @return JsonResponse
+     */
+    public function store(SyncOrderRequest $request): JsonResponse
     {
-        // 冪等性處理：若訂單已存在，回傳已建立的訂單資訊
-        $existingOrder = SalesOrder::where('external_order_id', $request->external_order_id)->first();
-        if ($existingOrder) {
-            return response()->json([
-                'message' => 'Order already exists',
-                'order_id' => $existingOrder->id,
-            ], 200);
-        }
-
-        $request->validate([
-            'external_order_id' => 'required|string|unique:sales_orders,external_order_id',
-            'warehouse' => 'nullable|string',
-            'warehouse_id' => 'nullable|integer',
-            'payment_method' => 'nullable|string|in:cash,credit_card,line_pay,ecpay,transfer,other',
-            'sold_at' => 'nullable|date',
-            'items' => 'required|array|min:1',
-            'items.*.pos_product_id' => 'required|string',
-            'items.*.qty' => 'required|numeric|min:0.0001',
-            'items.*.price' => 'required|numeric|min:0',
-        ]);
-
         try {
-            return DB::transaction(function () use ($request) {
-                // 1. 建立訂單
-                $order = SalesOrder::create([
-                    'external_order_id' => $request->external_order_id,
-                    'status' => 'completed',
-                    'payment_method' => $request->payment_method ?? 'cash',
-                    'total_amount' => 0,
-                    'sold_at' => $request->sold_at ?? now(),
-                    'raw_payload' => $request->all(),
-                ]);
+            // 所有驗證皆已透過 SyncOrderRequest 自動處理
+            // 將通過驗證的資料交由 Action 處理（包含併發鎖、預先驗證、與資料庫異動）
+            $result = $this->syncOrderAction->execute($request->validated());
 
-                // 2. 查找或建立倉庫
-                $warehouseId = $request->warehouse_id;
+            $statusCode = ($result['status'] === 'exists') ? 200 : 201;
 
-                if (empty($warehouseId)) {
-                    $warehouseName = $request->warehouse ?: '銷售倉庫';
-                    $warehouse = $this->inventoryService->findOrCreateWarehouseByName($warehouseName);
-                    $warehouseId = $warehouse->id;
-                }
+            return response()->json([
+                'message' => $result['message'],
+                'order_id' => $result['order_id'] ?? null,
+            ], $statusCode);
 
-                $totalAmount = 0;
-
-                // 3. 處理訂單明細
-                foreach ($request->items as $itemData) {
-                    // 透過介面查找產品
-                    $product = $this->productService->findByExternalPosId($itemData['pos_product_id']);
-
-                    if (!$product) {
-                        throw new \Exception(
-                            "Product not found for POS ID: " . $itemData['pos_product_id'] . ". Please sync product first."
-                        );
-                    }
-
-                    $qty = $itemData['qty'];
-                    $price = $itemData['price'];
-                    $lineTotal = $qty * $price;
-                    $totalAmount += $lineTotal;
-
-                    // 建立訂單明細
-                    SalesOrderItem::create([
-                        'sales_order_id' => $order->id,
-                        'product_id' => $product->id,
-                        'product_name' => $product->name,
-                        'quantity' => $qty,
-                        'price' => $price,
-                        'total' => $lineTotal,
-                    ]);
-
-                    // 4. 扣除庫存（強制模式，允許負庫存）
-                    $this->inventoryService->decreaseStock(
-                        $product->id,
-                        $warehouseId,
-                        $qty,
-                        "POS Order: " . $order->external_order_id,
-                        true
-                    );
-                }
-
-                $order->update(['total_amount' => $totalAmount]);
-
-                return response()->json([
-                    'message' => 'Order synced and stock deducted successfully',
-                    'order_id' => $order->id,
-                ], 201);
-            });
+        } catch (\Illuminate\Validation\ValidationException $e) {
+            // 捕捉 Action 中拋出的預先驗證錯誤 (如查無商品、或鎖定逾時)
+            return response()->json([
+                'message' => 'Validation failed',
+                'errors' => $e->errors()
+            ], 422);
 
         } catch (\Exception $e) {
-            Log::error('Order Sync Failed', ['error' => $e->getMessage(), 'payload' => $request->all()]);
-            return response()->json(['message' => 'Sync failed: ' . $e->getMessage()], 400);
+            // 系統層級的錯誤
+            Log::error('Order Sync Failed', [
+                'error' => $e->getMessage(),
+                'trace' => $e->getTraceAsString(),
+                'payload' => $request->all()
+            ]);
+            
+            return response()->json([
+                'message' => 'Sync failed: An unexpected error occurred.'
+            ], 500);
         }
     }
 }

app/Modules/Integration/Controllers/SalesOrderController.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace App\Modules\Integration\Controllers;
+
+use App\Http\Controllers\Controller;
+use App\Modules\Integration\Models\SalesOrder;
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+
+class SalesOrderController extends Controller
+{
+    /**
+     * 顯示銷售訂單列表
+     */
+    public function index(Request $request)
+    {
+        $query = SalesOrder::query();
+
+        // 搜尋篩選 (外部訂單號)
+        if ($request->filled('search')) {
+            $query->where('external_order_id', 'like', '%' . $request->search . '%');
+        }
+
+        // 來源篩選
+        if ($request->filled('source')) {
+            $query->where('source', $request->source);
+        }
+
+        // 排序
+        $query->orderBy('sold_at', 'desc');
+
+        $orders = $query->paginate($request->input('per_page', 10))
+            ->withQueryString();
+
+        return Inertia::render('Integration/SalesOrders/Index', [
+            'orders' => $orders,
+            'filters' => $request->only(['search', 'per_page', 'source']),
+        ]);
+    }
+
+    /**
+     * 顯示單一銷售訂單詳情
+     */
+    public function show(SalesOrder $salesOrder)
+    {
+        $salesOrder->load(['items']);
+
+        return Inertia::render('Integration/SalesOrders/Show', [
+            'order' => $salesOrder,
+        ]);
+    }
+}

app/Modules/Integration/Controllers/VendingOrderSyncController.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace App\Modules\Integration\Controllers;
+
+use App\Http\Controllers\Controller;
+use App\Modules\Integration\Requests\SyncVendingOrderRequest;
+use App\Modules\Integration\Actions\SyncVendingOrderAction;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Support\Facades\Log;
+
+class VendingOrderSyncController extends Controller
+{
+    protected $syncVendingOrderAction;
+
+    public function __construct(SyncVendingOrderAction $syncVendingOrderAction)
+    {
+        $this->syncVendingOrderAction = $syncVendingOrderAction;
+    }
+
+    /**
+     * 接收並同步販賣機交易訂單
+     *
+     * @param SyncVendingOrderRequest $request
+     * @return JsonResponse
+     */
+    public function store(SyncVendingOrderRequest $request): JsonResponse
+    {
+        try {
+            $result = $this->syncVendingOrderAction->execute($request->validated());
+
+            $statusCode = ($result['status'] === 'exists') ? 200 : 201;
+
+            return response()->json([
+                'message' => $result['message'],
+                'order_id' => $result['order_id'] ?? null,
+            ], $statusCode);
+
+        } catch (\Illuminate\Validation\ValidationException $e) {
+            return response()->json([
+                'message' => 'Validation failed',
+                'errors' => $e->errors()
+            ], 422);
+
+        } catch (\Exception $e) {
+            Log::error('Vending Order Sync Failed', [
+                'error' => $e->getMessage(),
+                'trace' => $e->getTraceAsString(),
+                'payload' => $request->all()
+            ]);
+
+            return response()->json([
+                'message' => 'Sync failed: An unexpected error occurred.'
+            ], 500);
+        }
+    }
+}

app/Modules/Integration/IntegrationServiceProvider.php

@@ -14,6 +14,7 @@ class IntegrationServiceProvider extends ServiceProvider
     public function boot()
     {
         $this->loadRoutesFrom(__DIR__ . '/Routes/api.php');
+        $this->loadRoutesFrom(__DIR__ . '/Routes/web.php');
         $this->loadMigrationsFrom(__DIR__ . '/Database/Migrations');
 
         // 註冊 Middleware 別名

app/Modules/Integration/Models/SalesOrder.php

@@ -16,6 +16,8 @@ class SalesOrder extends Model
         'total_amount',
         'sold_at',
         'raw_payload',
+        'source',
+        'source_label',
     ];
 
     protected $casts = [

app/Modules/Integration/Requests/SyncOrderRequest.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Modules\Integration\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class SyncOrderRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'external_order_id' => 'required|string',
+            'warehouse' => 'nullable|string',
+            'warehouse_id' => 'nullable|integer',
+            'payment_method' => 'nullable|string|in:cash,credit_card,line_pay,ecpay,transfer,other',
+            'sold_at' => 'nullable|date',
+            'items' => 'required|array|min:1',
+            'items.*.pos_product_id' => 'required|string',
+            'items.*.qty' => 'required|numeric|min:0.0001',
+            'items.*.price' => 'required|numeric|min:0',
+        ];
+    }
+}

app/Modules/Integration/Requests/SyncVendingOrderRequest.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Modules\Integration\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class SyncVendingOrderRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * 販賣機訂單同步的驗證規則
+     *
+     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'external_order_id' => 'required|string',
+            'machine_id'        => 'nullable|string',
+            'warehouse'         => 'nullable|string',
+            'warehouse_id'      => 'nullable|integer',
+            'payment_method'    => 'nullable|string|in:cash,electronic,line_pay,other',
+            'sold_at'           => 'nullable|date',
+            'items'             => 'required|array|min:1',
+            'items.*.product_code' => 'required|string',  // 使用 ERP 商品代碼
+            'items.*.qty'       => 'required|numeric|min:0.0001',
+            'items.*.price'     => 'required|numeric|min:0',
+        ];
+    }
+}

app/Modules/Integration/Routes/api.php

@@ -3,10 +3,12 @@
 use Illuminate\Support\Facades\Route;
 use App\Modules\Integration\Controllers\ProductSyncController;
 use App\Modules\Integration\Controllers\OrderSyncController;
+use App\Modules\Integration\Controllers\VendingOrderSyncController;
 
 Route::prefix('api/v1/integration')
     ->middleware(['api', 'throttle:integration', 'integration.tenant', 'auth:sanctum'])
     ->group(function () {
         Route::post('products/upsert', [ProductSyncController::class, 'upsert']);
         Route::post('orders', [OrderSyncController::class, 'store']);
+        Route::post('vending/orders', [VendingOrderSyncController::class, 'store']);
     });

app/Modules/Integration/Routes/web.php

@@ -0,0 +1,11 @@
+<?php
+
+use App\Modules\Integration\Controllers\SalesOrderController;
+use Illuminate\Support\Facades\Route;
+
+Route::middleware(['web', 'auth', 'verified'])->group(function () {
+    Route::prefix('integration')->name('integration.')->group(function () {
+        Route::get('sales-orders', [SalesOrderController::class, 'index'])->name('sales-orders.index');
+        Route::get('sales-orders/{salesOrder}', [SalesOrderController::class, 'show'])->name('sales-orders.show');
+    });
+});

app/Modules/Inventory/Contracts/ProductServiceInterface.php

@@ -22,4 +22,20 @@ interface ProductServiceInterface
      * @return object|null
      */
     public function findByExternalPosId(string $externalPosId);
+
+    /**
+     * 透過多個外部 POS ID 查找產品。
+     *
+     * @param array $externalPosIds
+     * @return \Illuminate\Database\Eloquent\Collection
+     */
+    public function findByExternalPosIds(array $externalPosIds);
+
+    /**
+     * 透過多個 ERP 商品代碼查找產品（供販賣機 API 使用）。
+     *
+     * @param array $codes
+     * @return \Illuminate\Database\Eloquent\Collection
+     */
+    public function findByCodes(array $codes);
 }

app/Modules/Inventory/Services/ProductService.php

@@ -88,4 +88,26 @@ class ProductService implements ProductServiceInterface
     {
         return Product::where('external_pos_id', $externalPosId)->first();
     }
+
+    /**
+     * 透過多個外部 POS ID 查找產品。
+     *
+     * @param array $externalPosIds
+     * @return \Illuminate\Database\Eloquent\Collection
+     */
+    public function findByExternalPosIds(array $externalPosIds)
+    {
+        return Product::whereIn('external_pos_id', $externalPosIds)->get();
+    }
+
+    /**
+     * 透過多個 ERP 商品代碼查找產品（供販賣機 API 使用）。
+     *
+     * @param array $codes
+     * @return \Illuminate\Database\Eloquent\Collection
+     */
+    public function findByCodes(array $codes)
+    {
+        return Product::whereIn('code', $codes)->get();
+    }
 }