购物车悬浮

2026-08-27 18:13:43 +08:00
parent 52dc6efadf
commit f3e190f460
9 changed files with 330 additions and 6 deletions
@@ -0,0 +1,83 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\CartModel;
+use App\Models\CustomerLevelModel;
+use App\Models\ProductModel;
+use App\Models\StoreModel;
+
+/**
+ * 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）
+ *
+ * 汇总口径（与 Mini/CartController::index 一致，勿偏离）：
+ * - total_count = 购物车全部行数（含已下架等不可购项）
+ * - total_quantity / total_amount = 仅统计可购项（商品在上架且门店已设等级），
+ *   金额 = Σ 数量 × 等级上浮价（CustomerLevelModel::calcLevelPrice）
+ */
+class CartService
+{
+    /**
+     * 门店购物车行映射：product_id => ['id' => 购物车行ID, 'quantity' => 数量字符串]
+     * （商品列表/详情附加 cart_id/cart_quantity 用；行ID供直接加减/删除操作）
+     *
+     * @return array<int, array{id: int, quantity: string}>
+     */
+    public function cartRowMap(int $storeId): array
+    {
+        return CartModel::query()
+            ->where('store_id', $storeId)
+            ->get(['id', 'product_id', 'quantity'])
+            ->keyBy('product_id')
+            ->map(static fn (CartModel $row): array => [
+                'id' => (int) $row->id,
+                'quantity' => (string) $row->quantity,
+            ])
+            ->all();
+    }
+
+    /**
+     * 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）
+     *
+     * @return array{total_count: int, total_quantity: string, total_amount: string}
+     */
+    public function summary(?StoreModel $store): array
+    {
+        $empty = ['total_count' => 0, 'total_quantity' => '0.00', 'total_amount' => '0.00'];
+        if ($store === null) {
+            return $empty;
+        }
+
+        $rows = CartModel::query()
+            ->where('store_id', $store->id)
+            ->get(['id', 'product_id', 'quantity']);
+        if ($rows->isEmpty()) {
+            return $empty;
+        }
+
+        $products = ProductModel::query()
+            ->where('status', ProductModel::STATUS_ON)
+            ->whereIn('id', $rows->pluck('product_id')->all())
+            ->get(['id', 'cost_price'])
+            ->keyBy('id');
+        $level = $store->level_id > 0 ? $store->level : null;
+
+        $totalQuantity = '0.00';
+        $totalAmount = '0.00';
+        foreach ($rows as $row) {
+            $product = $products->get($row->product_id);
+            if ($product === null || $level === null) {
+                continue;
+            }
+            $price = CustomerLevelModel::calcLevelPrice($product->cost_price, $level->percent);
+            $totalQuantity = bcadd($totalQuantity, (string) $row->quantity, 2);
+            $totalAmount = bcadd($totalAmount, bcmul($price, (string) $row->quantity, 2), 2);
+        }
+
+        return [
+            'total_count' => $rows->count(),
+            'total_quantity' => $totalQuantity,
+            'total_amount' => $totalAmount,
+        ];
+    }
+}