采购单优化
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<?php
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namespace App\Services;
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use App\Models\ProductModel;
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use App\Models\PurchaseOrderModel;
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use App\Models\StoreOrderItemModel;
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use App\Models\StoreOrderModel;
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use Illuminate\Database\Eloquent\Collection;
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use Illuminate\Support\Facades\DB;
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/**
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* 采购单明细共享服务：订单/采购单汇总重算 + 门店/供应商维度的商品行聚合
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*
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* 汇总口径（勿偏离）：
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* - 订单：total_quantity=Σ数量、total_weight=Σ称重、total_amount=Σ金额
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* - 采购单：total_quantity=Σ数量、estimate_amount=Σ(数量×成本价)（预估成本）、total_weight=Σ称重
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*/
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class PurchaseItemService
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{
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/**
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* 重算门店订单汇总（明细增删改后调用）
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*/
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public function recalcOrder(int $orderId): void
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{
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$order = StoreOrderModel::query()->find($orderId);
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if ($order === null) {
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return;
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}
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$order->total_quantity = (int) $order->items()->sum('quantity');
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$order->total_weight = $order->items()->sum('weight');
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$order->total_amount = $order->items()->sum('amount');
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$order->save();
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}
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/**
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* 重算采购单汇总（明细增删改后调用）
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*/
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public function recalcPurchase(int $purchaseId): void
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{
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$purchase = PurchaseOrderModel::query()->find($purchaseId);
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if ($purchase === null) {
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return;
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}
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$purchase->total_quantity = (int) StoreOrderItemModel::query()
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->where('purchase_id', $purchaseId)->sum('quantity');
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$purchase->estimate_amount = StoreOrderItemModel::query()
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->where('purchase_id', $purchaseId)->sum(DB::raw('quantity * cost_price'));
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$purchase->total_weight = StoreOrderItemModel::query()
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->where('purchase_id', $purchaseId)->sum('weight');
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$purchase->save();
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}
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/**
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* 采购单内指定门店的采购汇总行（按商品聚合，单价=加权平均 Σ金额÷Σ数量，
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* 排序：分类 sort → 商品 sort，与明细矩阵同序）
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*
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* @return array<int, array<string, mixed>>
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*/
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public function storeSummaryRows(int $purchaseId, int $storeId): array
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{
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$items = $this->purchaseItems($purchaseId)
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->where('store_id', $storeId)
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->sortBy('id');
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$rows = [];
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foreach ($items->groupBy('product_id') as $productId => $group) {
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$first = $group->first();
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$quantity = 0;
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$amount = '0';
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$weight = '0';
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foreach ($group as $item) {
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$weight = bcadd($weight, (string) $item->weight, 3);
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$quantity += (int) $item->quantity;
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$amount = bcadd($amount, (string) $item->amount, 2);
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}
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$rows[] = [
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'product_id' => (int) $productId,
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'product_name' => $first->product_name,
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'product_spec' => $first->product_spec,
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'unit' => $first->unit,
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// 加权平均单价（保证 单价×数量=预计金额）
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'price' => $quantity > 0
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? bcdiv($amount, (string) $quantity, 2)
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: (string) $first->price,
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'quantity' => $quantity,
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'amount' => $amount,
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'weight' => $weight,
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'category_sort' => (int) data_get($first, 'category_sort', 9999),
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'product_sort' => (int) data_get($first, 'product_sort', 9999),
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];
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}
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return $this->sortRows($rows);
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}
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/**
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* 采购单内指定供应商的商品聚合行（成本口径：金额=Σ数量×成本价，
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* 排序：分类 sort → 商品 sort）
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*
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* @return array<int, array<string, mixed>>
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*/
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public function supplierRows(int $purchaseId, int $supplierId): array
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{
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$items = $this->purchaseItems($purchaseId)
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->where('supplier_id', $supplierId)
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->sortBy('id');
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$rows = [];
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foreach ($items->groupBy('product_id') as $productId => $group) {
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$first = $group->first();
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$quantity = 0;
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$weight = '0';
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$amount = '0';
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foreach ($group as $item) {
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$quantity += (int) $item->quantity;
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$weight = bcadd($weight, (string) $item->weight, 3);
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$amount = bcadd($amount, bcmul((string) $item->quantity, (string) $item->cost_price, 2), 2);
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}
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$rows[] = [
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'product_id' => (int) $productId,
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'product_name' => $first->product_name,
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'product_spec' => $first->product_spec,
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'unit' => $first->unit,
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'cost_price' => (string) $first->cost_price,
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'quantity' => $quantity,
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'weight' => $weight,
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'amount' => $amount,
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'category_sort' => (int) data_get($first, 'category_sort', 9999),
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'product_sort' => (int) data_get($first, 'product_sort', 9999),
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];
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}
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return $this->sortRows($rows);
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}
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/**
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* 采购单订货明细（关联订单过滤软删、成本价可见、附分类/商品排序键）
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*
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* @return Collection<int, StoreOrderItemModel>
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*/
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private function purchaseItems(int $purchaseId): Collection
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{
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$items = StoreOrderItemModel::query()
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->join('store_order', 'store_order.id', '=', 'store_order_item.order_id')
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->where('store_order_item.purchase_id', $purchaseId)
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->whereNull('store_order.deleted_at')
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->select('store_order_item.*')
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->get()
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->makeVisible('cost_price');
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// 排序键：商品分类 sort → 商品 sort（商品含软删除，保证历史单据可导出）
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$products = ProductModel::withTrashed()
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->with('category:id,sort')
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->whereIn('id', $items->pluck('product_id')->unique())
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->get(['id', 'category_id', 'sort'])
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->keyBy('id');
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foreach ($items as $item) {
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$product = $products->get((int) $item->product_id);
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$item->setAttribute('category_sort', (int) ($product?->category?->sort ?? 9999));
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$item->setAttribute('product_sort', (int) ($product?->sort ?? 9999));
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}
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return $items;
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}
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/**
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* 排序并剥离排序键
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*
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* @param array<int, array<string, mixed>> $rows
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* @return array<int, array<string, mixed>>
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*/
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private function sortRows(array $rows): array
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{
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usort($rows, static fn (array $a, array $b): int =>
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[$a['category_sort'], $a['product_sort'], $a['product_id']]
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<=> [$b['category_sort'], $b['product_sort'], $b['product_id']]);
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return array_map(static function (array $row): array {
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unset($row['category_sort'], $row['product_sort']);
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return $row;
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}, $rows);
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}
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}
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