refactor(modular): 完成第二階段儀表板解耦與模型清理

app/Modules/Core/Contracts/CoreServiceInterface.php

@@ -28,4 +28,11 @@ interface CoreServiceInterface
      * @return Collection
      */
     public function getAllUsers(): Collection;
+
+    /**
+     * Get the system user or create one if not exists.
+     * 
+     * @return object
+     */
+    public function ensureSystemUserExists();
 }

app/Modules/Core/Controllers/DashboardController.php

@@ -4,18 +4,24 @@ namespace App\Modules\Core\Controllers;
 
 use App\Http\Controllers\Controller;
 
-use App\Modules\Inventory\Models\Product;
-use App\Modules\Procurement\Models\Vendor;
-use App\Modules\Procurement\Models\PurchaseOrder;
-use App\Modules\Inventory\Models\Warehouse;
-use App\Modules\Inventory\Models\Inventory;
-use App\Modules\Inventory\Models\WarehouseProductSafetyStock;
+use App\Modules\Inventory\Contracts\InventoryServiceInterface;
+use App\Modules\Procurement\Contracts\ProcurementServiceInterface;
 use Inertia\Inertia;
 use Illuminate\Http\Request;
-use Illuminate\Support\Facades\DB;
 
 class DashboardController extends Controller
 {
+    protected $inventoryService;
+    protected $procurementService;
+
+    public function __construct(
+        InventoryServiceInterface $inventoryService,
+        ProcurementServiceInterface $procurementService
+    ) {
+        $this->inventoryService = $inventoryService;
+        $this->procurementService = $procurementService;
+    }
+
     public function index()
     {
         $centralDomains = config('tenancy.central_domains', []);
@@ -25,25 +31,17 @@ class DashboardController extends Controller
             return redirect()->route('landlord.dashboard');
         }
 
-        // 計算低庫存數量：各商品在各倉庫的總量 < 安全庫存
-        $lowStockCount = DB::table('warehouse_product_safety_stocks as ss')
-            ->join(DB::raw('(SELECT warehouse_id, product_id, SUM(quantity) as total_qty FROM inventories WHERE deleted_at IS NULL GROUP BY warehouse_id, product_id) as inv'),
-                function ($join) {
-                    $join->on('ss.warehouse_id', '=', 'inv.warehouse_id')
-                         ->on('ss.product_id', '=', 'inv.product_id');
-                })
-            ->whereRaw('inv.total_qty <= ss.safety_stock')
-            ->count();
+        $invStats = $this->inventoryService->getDashboardStats();
+        $procStats = $this->procurementService->getDashboardStats();
 
         $stats = [
-            'productsCount' => Product::count(),
-            'vendorsCount' => Vendor::count(),
-            'purchaseOrdersCount' => PurchaseOrder::count(),
-            'warehousesCount' => Warehouse::count(),
-            'totalInventoryValue' => Inventory::join('products', 'inventories.product_id', '=', 'products.id')
-                ->sum('inventories.quantity'),
-            'pendingOrdersCount' => PurchaseOrder::where('status', 'pending')->count(),
-            'lowStockCount' => $lowStockCount,
+            'productsCount' => $invStats['productsCount'],
+            'vendorsCount' => $procStats['vendorsCount'],
+            'purchaseOrdersCount' => $procStats['purchaseOrdersCount'],
+            'warehousesCount' => $invStats['warehousesCount'],
+            'totalInventoryValue' => $invStats['totalInventoryQuantity'], // 原本前端命名是 totalInventoryValue 但實作是 Quantity，暫且保留欄位名以不破壞前端
+            'pendingOrdersCount' => $procStats['pendingOrdersCount'],
+            'lowStockCount' => $invStats['lowStockCount'],
         ];
 
         return Inertia::render('Dashboard', [

app/Modules/Core/Services/CoreService.php

@@ -39,4 +39,17 @@ class CoreService implements CoreServiceInterface
     {
         return User::all();
     }
+
+    public function ensureSystemUserExists()
+    {
+        $user = User::first();
+        if (!$user) {
+            $user = User::create([
+                'name' => '系統管理員',
+                'email' => 'admin@example.com',
+                'password' => bcrypt('password'),
+            ]);
+        }
+        return $user;
+    }
 }