采购单优化

app/Exports/PurchaseStoreExport.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Exports;
+
+use App\Exceptions\RepositoryException;
+use App\Models\PurchaseOrderModel;
+use App\Models\StoreModel;
+use App\Models\StoreOrderItemModel;
+use Maatwebsite\Excel\Concerns\WithMultipleSheets;
+
+/**
+ * 门店购买详情导出：多门店合并为一个 XLSX（每门店一个工作表，工作表名=门店名称）；
+ * 构造传入 storeId 时仅导出该门店（单工作表）
+ */
+class PurchaseStoreExport implements WithMultipleSheets
+{
+    /**
+     * @param PurchaseOrderModel $purchase 采购单
+     * @param int $storeId 单门店导出（0=全部门店）
+     */
+    public function __construct(
+        private readonly PurchaseOrderModel $purchase,
+        private readonly int $storeId = 0,
+    ) {
+    }
+
+    /**
+     * @return array<int, PurchaseStoreSheet>
+     */
+    public function sheets(): array
+    {
+        // 本采购单内有明细的门店（含软删除，保证历史单据可导出）
+        $query = StoreOrderItemModel::query()
+            ->join('store_order', 'store_order.id', '=', 'store_order_item.order_id')
+            ->where('store_order_item.purchase_id', $this->purchase->id)
+            ->whereNull('store_order.deleted_at');
+        if ($this->storeId > 0) {
+            $query->where('store_order_item.store_id', $this->storeId);
+        }
+        $storeIds = $query->distinct()->pluck('store_order_item.store_id');
+
+        if ($storeIds->isEmpty()) {
+            throw new RepositoryException(
+                $this->storeId > 0 ? '该门店在此采购单中无采购商品' : '该采购单无门店采购明细，无法导出'
+            );
+        }
+
+        $stores = StoreModel::withTrashed()
+            ->whereIn('id', $storeIds)
+            ->orderBy('id')
+            ->get(['id', 'name']);
+
+        $usedNames = [];
+        $sheets = [];
+        foreach ($stores as $store) {
+            $sheets[] = new PurchaseStoreSheet(
+                $this->purchase,
+                $store,
+                SheetName::make((string) $store->name, (int) $store->id, $usedNames),
+            );
+        }
+
+        return $sheets;
+    }
+}