新增 POS 庫存查詢 API：實作 InventorySyncController 與相關 Service 邏輯，並更新 API 整合手冊

app/Modules/Core/Controllers/ActivityLogController.php

@@ -22,6 +22,7 @@ class ActivityLogController extends Controller
             'App\Modules\Procurement\Models\PurchaseOrder' => '採購單',
             'App\Modules\Inventory\Models\Warehouse' => '倉庫',
             'App\Modules\Inventory\Models\Inventory' => '庫存',
+            'App\Modules\Inventory\Models\InventoryTransaction' => '庫存異動紀錄',
             'App\Modules\Finance\Models\UtilityFee' => '公共事業費',
             'App\Modules\Inventory\Models\GoodsReceipt' => '進貨單',
             'App\Modules\Production\Models\ProductionOrder' => '生產工單',

app/Modules/Integration/Controllers/InventorySyncController.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Modules\Integration\Controllers;
+
+use App\Http\Controllers\Controller;
+use App\Modules\Inventory\Contracts\InventoryServiceInterface;
+use Illuminate\Http\JsonResponse;
+
+class InventorySyncController extends Controller
+{
+    protected $inventoryService;
+
+    public function __construct(InventoryServiceInterface $inventoryService)
+    {
+        $this->inventoryService = $inventoryService;
+    }
+
+    /**
+     * 提供外部 POS 查詢指定倉庫的商品庫存餘額
+     *
+     * @param string $warehouseCode
+     * @return JsonResponse
+     */
+    public function show(string $warehouseCode): JsonResponse
+    {
+        // 透過 Service 調用跨模組庫存查詢功能
+        $inventoryData = $this->inventoryService->getPosInventoryByWarehouseCode($warehouseCode);
+
+        // 若回傳 null，表示尋無此倉庫代碼
+        if (is_null($inventoryData)) {
+            return response()->json([
+                'status' => 'error',
+                'message' => "Warehouse with code '{$warehouseCode}' not found.",
+            ], 404);
+        }
+
+        // 以 JSON 格式回傳組合好的商品庫存列表
+        return response()->json([
+            'status' => 'success',
+            'warehouse_code' => $warehouseCode,
+            'data' => $inventoryData->map(function ($item) {
+                return [
+                    'external_pos_id' => $item->external_pos_id,
+                    'product_code' => $item->product_code,
+                    'product_name' => $item->product_name,
+                    'quantity' => (float) $item->total_quantity,
+                ];
+            })
+        ], 200);
+    }
+}

app/Modules/Integration/Routes/api.php

@@ -4,6 +4,7 @@ use Illuminate\Support\Facades\Route;
 use App\Modules\Integration\Controllers\ProductSyncController;
 use App\Modules\Integration\Controllers\OrderSyncController;
 use App\Modules\Integration\Controllers\VendingOrderSyncController;
+use App\Modules\Integration\Controllers\InventorySyncController;
 
 Route::prefix('api/v1/integration')
     ->middleware(['api', 'throttle:integration', 'integration.tenant', 'auth:sanctum'])
@@ -11,4 +12,5 @@ Route::prefix('api/v1/integration')
         Route::post('products/upsert', [ProductSyncController::class, 'upsert']);
         Route::post('orders', [OrderSyncController::class, 'store']);
         Route::post('vending/orders', [VendingOrderSyncController::class, 'store']);
+        Route::get('inventory/{warehouse_code}', [InventorySyncController::class, 'show']);
     });

app/Modules/Inventory/Contracts/InventoryServiceInterface.php

@@ -157,4 +157,12 @@ interface InventoryServiceInterface
      * Get items expiring soon for dashboard.
      */
     public function getExpiringSoon(int $limit = 5): \Illuminate\Support\Collection;
+
+    /**
+     * Get inventory summary (group by product) for a specific warehouse code
+     * 
+     * @param string $code
+     * @return \Illuminate\Support\Collection|null
+     */
+    public function getPosInventoryByWarehouseCode(string $code);
 }

app/Modules/Inventory/Controllers/InventoryController.php

@@ -259,7 +259,7 @@ class InventoryController extends Controller
                 $inventory->quantity = $newQty;
                 // 更新總價值
                 $inventory->total_value = $inventory->quantity * $inventory->unit_cost;
-                $inventory->save();
+                $inventory->saveQuietly(); // 使用 saveQuietly() 避免產生冗餘的「單據已更新」日誌
 
                 // 寫入異動紀錄
                 $inventory->transactions()->create([
@@ -436,7 +436,7 @@ class InventoryController extends Controller
             $inventory->quantity = $newQty;
             // 更新總值
             $inventory->total_value = $inventory->quantity * $inventory->unit_cost;
-            $inventory->save();
+            $inventory->saveQuietly(); // 使用 saveQuietly() 避免與下方的 transaction 紀錄重複
 
             // 異動類型映射
             $type = $validated['type'] ?? ($isAdjustment ? 'manual_adjustment' : 'adjustment');

app/Modules/Inventory/Models/Inventory.php

@@ -58,8 +58,11 @@ class Inventory extends Model
 
     public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
     {
-        $properties = $activity->properties;
+        // 核心：轉換為陣列以避免 Indirect modification error
-        $attributes = $properties['attributes'] ?? [];
+        $properties = $activity->properties instanceof \Illuminate\Support\Collection 
+            ? $activity->properties->toArray() 
+            : $activity->properties;
+
         $snapshot = $properties['snapshot'] ?? [];
 
         // 始終對名稱進行快照以便於上下文顯示，即使 ID 未更改
@@ -69,11 +72,28 @@ class Inventory extends Model
 
         // 如果已設定原因，則進行捕捉
         if ($this->activityLogReason) {
-            $attributes['_reason'] = $this->activityLogReason;
+            $properties['attributes']['_reason'] = $this->activityLogReason;
         }
-
+        
-        $properties['attributes'] = $attributes;
         $properties['snapshot'] = $snapshot;
+
+        // 全域 ID 轉名稱邏輯
+        $resolver = function (&$data) {
+            if (empty($data) || !is_array($data)) return;
+            
+            // 倉庫 ID 轉換
+            if (isset($data['warehouse_id']) && is_numeric($data['warehouse_id'])) {
+                $data['warehouse_id'] = \App\Modules\Inventory\Models\Warehouse::find($data['warehouse_id'])?->name;
+            }
+            // 商品 ID 轉換
+            if (isset($data['product_id']) && is_numeric($data['product_id'])) {
+                $data['product_id'] = \App\Modules\Inventory\Models\Product::find($data['product_id'])?->name;
+            }
+        };
+
+        if (isset($properties['attributes'])) $resolver($properties['attributes']);
+        if (isset($properties['old'])) $resolver($properties['old']);
+
         $activity->properties = $properties;
     }
 

app/Modules/Inventory/Models/InventoryTransaction.php

@@ -10,6 +10,7 @@ class InventoryTransaction extends Model
 {
     /** @use HasFactory<\Database\Factories\InventoryTransactionFactory> */
     use HasFactory;
+    use \Spatie\Activitylog\Traits\LogsActivity;
 
     protected $fillable = [
         'inventory_id',
@@ -41,4 +42,49 @@ class InventoryTransaction extends Model
     {
         return $this->morphTo();
     }
+
+    public function getActivitylogOptions(): \Spatie\Activitylog\LogOptions
+    {
+        return \Spatie\Activitylog\LogOptions::defaults()
+            ->logAll()
+            ->dontLogIfAttributesChangedOnly(['updated_at'])
+            // 取消 logOnlyDirty，代表新增時(created)也要留紀錄
+            ->dontSubmitEmptyLogs();
+    }
+
+    public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
+    {
+        $properties = $activity->properties instanceof \Illuminate\Support\Collection 
+            ? $activity->properties->toArray() 
+            : $activity->properties;
+
+        $snapshot = $properties['snapshot'] ?? [];
+
+        // 試著取得商品與倉庫名稱來作為主要顯示依據
+        $inventory = $this->inventory;
+        if ($inventory) {
+            $snapshot['warehouse_name'] = $inventory->warehouse ? $inventory->warehouse->name : null;
+            $snapshot['product_name'] = $inventory->product ? $inventory->product->name : null;
+            $snapshot['batch_number'] = $inventory->batch_number;
+        }
+
+        // 把異動類型與數量也拉到 snapshot
+        $snapshot['type'] = $this->type;
+        $snapshot['quantity'] = $this->quantity;
+        $snapshot['reason'] = $this->reason;
+        
+        // 替換使用者名稱
+        $resolver = function (&$data) {
+            if (empty($data) || !is_array($data)) return;
+            if (isset($data['user_id']) && is_numeric($data['user_id'])) {
+                $data['user_id'] = \App\Modules\Core\Models\User::find($data['user_id'])?->name;
+            }
+        };
+
+        if (isset($properties['attributes'])) $resolver($properties['attributes']);
+        if (isset($properties['old'])) $resolver($properties['old']);
+
+        $properties['snapshot'] = $snapshot;
+        $activity->properties = $properties;
+    }
 }

app/Modules/Inventory/Models/Product.php

@@ -85,30 +85,50 @@ class Product extends Model
 
     public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
     {
-        $properties = $activity->properties;
+        // 核心：轉換為陣列以避免 Indirect modification error
-        $attributes = $properties['attributes'] ?? [];
+        $properties = $activity->properties instanceof \Illuminate\Support\Collection 
+            ? $activity->properties->toArray() 
+            : $activity->properties;
+
         $snapshot = $properties['snapshot'] ?? [];
         
-        // 處理分類名稱快照
-        if (isset($attributes['category_id'])) {
-            $category = Category::find($attributes['category_id']);
-            $snapshot['category_name'] = $category ? $category->name : null;
-        }
-        
-        // 處理單位名稱快照
-        $unitFields = ['base_unit_id', 'large_unit_id', 'purchase_unit_id'];
-        foreach ($unitFields as $field) {
-            if (isset($attributes[$field])) {
-                $unit = Unit::find($attributes[$field]);
-                $nameKey = str_replace('_id', '_name', $field);
-                $snapshot[$nameKey] = $unit ? $unit->name : null;
-            }
-        }
-        
         // 始終對自身名稱進行快照以便於上下文顯示（這樣日誌總是顯示 "可樂"）
         $snapshot['name'] = $this->name;
 
-        $properties['attributes'] = $attributes;
+        $properties['snapshot'] = $snapshot;
+
+        // 全域 ID 轉名稱邏輯
+        $resolver = function (&$data) use (&$snapshot) {
+            if (empty($data) || !is_array($data)) return;
+            
+            // 處理分類名稱
+            if (isset($data['category_id']) && is_numeric($data['category_id'])) {
+                $categoryName = Category::find($data['category_id'])?->name;
+                $data['category_id'] = $categoryName;
+                if (!isset($snapshot['category_name']) && $categoryName) {
+                    $snapshot['category_name'] = $categoryName;
+                }
+            }
+            
+            // 處理單位名稱
+            $unitFields = ['base_unit_id', 'large_unit_id', 'purchase_unit_id'];
+            foreach ($unitFields as $field) {
+                if (isset($data[$field]) && is_numeric($data[$field])) {
+                    $unitName = Unit::find($data[$field])?->name;
+                    $data[$field] = $unitName;
+                    
+                    $nameKey = str_replace('_id', '_name', $field);
+                    if (!isset($snapshot[$nameKey]) && $unitName) {
+                        $snapshot[$nameKey] = $unitName;
+                    }
+                }
+            }
+        };
+
+        if (isset($properties['attributes'])) $resolver($properties['attributes']);
+        if (isset($properties['old'])) $resolver($properties['old']);
+
+        // 因為 resolver 內部可能更新了 snapshot，所以再覆寫一次
         $properties['snapshot'] = $snapshot;
         $activity->properties = $properties;
     }

app/Modules/Inventory/Services/InventoryService.php

@@ -644,4 +644,34 @@ class InventoryService implements InventoryServiceInterface
             ]
         );
     }
+
+    /**
+     * 取得特定倉庫代碼的所屬商品總庫存 (給 POS/外部系統同步使用)
+     *
+     * @param string $code
+     * @return \Illuminate\Support\Collection|null
+     */
+    public function getPosInventoryByWarehouseCode(string $code)
+    {
+        $warehouse = Warehouse::where('code', $code)->first();
+
+        if (!$warehouse) {
+            return null;
+        }
+
+        // 整理該倉庫的庫存，以 product_id 進行 GROUP BY 並加總 quantity
+        return DB::table('inventories')
+            ->join('products', 'inventories.product_id', '=', 'products.id')
+            ->where('inventories.warehouse_id', $warehouse->id)
+            ->whereNull('inventories.deleted_at')
+            ->whereNull('products.deleted_at')
+            ->select(
+                'products.external_pos_id',
+                'products.code as product_code',
+                'products.name as product_name',
+                DB::raw('SUM(inventories.quantity) as total_quantity')
+            )
+            ->groupBy('inventories.product_id', 'products.external_pos_id', 'products.code', 'products.name')
+            ->get();
+    }
 }

resources/markdown/manual/api-integration.md

@@ -73,7 +73,57 @@ Star ERP 系統提供外部整合 API (Integration API) 供電商前台、POS
 
 ---
 
-## 2. 訂單資料寫入與扣庫 (Create Order)
+## 2. 門市庫存查詢 (Query Inventory)
+
+此 API 用於讓外部系統（如 POS）依據特定的「倉庫代碼」，查詢該倉庫目前所有商品的庫存餘額。
+**注意**：此 API 會回傳該倉庫內的所有商品數量，不論該商品是否已綁定外部 POS ID。
+
+- **Endpoint**: `/inventory/{warehouse_code}`
+- **Method**: `GET`
+
+### URL 路徑參數
+
+| 參數名稱 | 類型 | 必填 | 說明 |
+| :--- | :--- | :---: | :--- |
+| `warehouse_code` | String | **是** | 要查詢的倉庫代碼 (例如：`STORE-001`) |
+
+### Response
+
+**Success (HTTP 200)**
+回傳該倉庫內所有的商品目前庫存總數。若商品未建置 `external_pos_id`，該欄位將顯示為 `null`。
+```json
+{
+    "status": "success",
+    "warehouse_code": "STORE-001",
+    "data": [
+        {
+            "external_pos_id": "POS-ITEM-001",
+            "product_code": "PROD-A001",
+            "product_name": "特級冷壓初榨橄欖油 500ml",
+            "quantity": 15
+        },
+        {
+            "external_pos_id": null,
+            "product_code": "MAT-001",
+            "product_name": "未包裝干貝醬原料",
+            "quantity": 2.5
+        }
+    ]
+}
+```
+
+**Error: Warehouse Not Found (HTTP 404)**
+當傳入系統中不存在的倉庫代碼時發生。
+```json
+{
+    "status": "error",
+    "message": "Warehouse with code 'STORE-999' not found."
+}
+```
+
+---
+
+## 3. 訂單資料寫入與扣庫 (Create Order)
 
 此 API 用於讓第三方系統（如 POS 結帳後）將「已成交」的訂單推送到 ERP。
 **重要提醒**：寫入訂單的同時，ERP 會自動且**強制**扣除對應倉庫的庫存（允許扣至負數，以利後續盤點或補單）。