84 lines
2.9 KiB
PHP
84 lines
2.9 KiB
PHP
<?php
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namespace App\Services;
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use App\Models\CartModel;
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use App\Models\CustomerLevelModel;
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use App\Models\ProductModel;
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use App\Models\StoreModel;
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/**
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* 购物车共享服务：商品列表/详情附加购物车数量、悬浮球汇总（种数/总数量/总金额）
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*
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* 汇总口径（与 Mini/CartController::index 一致，勿偏离）：
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* - total_count = 购物车全部行数（含已下架等不可购项）
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* - total_quantity / total_amount = 仅统计可购项（商品在上架且门店已设等级），
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* 金额 = Σ 数量 × 等级上浮价（CustomerLevelModel::calcLevelPrice）
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*/
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class CartService
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{
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/**
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* 门店购物车行映射：product_id => ['id' => 购物车行ID, 'quantity' => 数量字符串]
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* （商品列表/详情附加 cart_id/cart_quantity 用；行ID供直接加减/删除操作）
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*
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* @return array<int, array{id: int, quantity: string}>
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*/
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public function cartRowMap(int $storeId): array
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{
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return CartModel::query()
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->where('store_id', $storeId)
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->get(['id', 'product_id', 'quantity'])
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->keyBy('product_id')
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->map(static fn (CartModel $row): array => [
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'id' => (int) $row->id,
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'quantity' => (string) $row->quantity,
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])
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->all();
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}
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/**
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* 购物车悬浮球汇总：种数/总数量/总金额（未登录或空购物车返回零值结构）
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*
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* @return array{total_count: int, total_quantity: string, total_amount: string}
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*/
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public function summary(?StoreModel $store): array
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{
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$empty = ['total_count' => 0, 'total_quantity' => '0.00', 'total_amount' => '0.00'];
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if ($store === null) {
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return $empty;
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}
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$rows = CartModel::query()
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->where('store_id', $store->id)
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->get(['id', 'product_id', 'quantity']);
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if ($rows->isEmpty()) {
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return $empty;
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}
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$products = ProductModel::query()
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->where('status', ProductModel::STATUS_ON)
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->whereIn('id', $rows->pluck('product_id')->all())
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->get(['id', 'cost_price'])
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->keyBy('id');
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$level = $store->level_id > 0 ? $store->level : null;
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$totalQuantity = '0.00';
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$totalAmount = '0.00';
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foreach ($rows as $row) {
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$product = $products->get($row->product_id);
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if ($product === null || $level === null) {
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continue;
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}
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$price = CustomerLevelModel::calcLevelPrice($product->cost_price, $level->percent);
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$totalQuantity = bcadd($totalQuantity, (string) $row->quantity, 2);
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$totalAmount = bcadd($totalAmount, bcmul($price, (string) $row->quantity, 2), 2);
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}
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return [
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'total_count' => $rows->count(),
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'total_quantity' => $totalQuantity,
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'total_amount' => $totalAmount,
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];
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}
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}
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