Add internal/handler/shop.go

internal/handler/shop.go

@@ -0,0 +1,89 @@
+package handler
+
+import (
+	"strconv"
+
+	"gotest/internal/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+// ShopHandler 电商数据处理器
+type ShopHandler struct {
+	svc *service.ShopService
+}
+
+// NewShopHandler 创建电商数据处理器
+func NewShopHandler(svc *service.ShopService) *ShopHandler {
+	return &ShopHandler{svc: svc}
+}
+
+// GetHomeData 获取商城首页数据 GET /api/v1/shop/home
+func (h *ShopHandler) GetHomeData(c *gin.Context) {
+	data, err := h.svc.GetHomeData()
+	if err != nil {
+		FailInternal(c, "获取首页数据失败")
+		return
+	}
+	Success(c, data)
+}
+
+// ListCategories 获取分类列表 GET /api/v1/shop/categories
+func (h *ShopHandler) ListCategories(c *gin.Context) {
+	data, err := h.svc.ListCategories()
+	if err != nil {
+		FailInternal(c, "获取分类失败")
+		return
+	}
+	Success(c, data)
+}
+
+// ListProducts 获取商品列表 GET /api/v1/shop/products?category_id=&keyword=&sort=&page=&page_size=
+func (h *ShopHandler) ListProducts(c *gin.Context) {
+	categoryID, _ := strconv.ParseUint(c.Query("category_id"), 10, 64)
+	keyword := c.Query("keyword")
+	sort := c.Query("sort")
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "12"))
+	if page < 1 {
+		page = 1
+	}
+	if pageSize < 1 || pageSize > 100 {
+		pageSize = 12
+	}
+	data, err := h.svc.ListProducts(uint(categoryID), keyword, sort, page, pageSize)
+	if err != nil {
+		FailInternal(c, "获取商品列表失败")
+		return
+	}
+	Success(c, data)
+}
+
+// GetProduct 获取商品详情 GET /api/v1/shop/products/:id
+func (h *ShopHandler) GetProduct(c *gin.Context) {
+	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
+	if err != nil {
+		FailBadRequest(c, "无效的商品 ID")
+		return
+	}
+	data, err := h.svc.GetProduct(uint(id))
+	if err != nil {
+		FailBadRequest(c, "商品不存在")
+		return
+	}
+	Success(c, data)
+}
+
+// ListFeatured 获取推荐商品 GET /api/v1/shop/featured?limit=
+func (h *ShopHandler) ListFeatured(c *gin.Context) {
+	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "8"))
+	if limit < 1 || limit > 50 {
+		limit = 8
+	}
+	data, err := h.svc.ListFeatured(limit)
+	if err != nil {
+		FailInternal(c, "获取推荐商品失败")
+		return
+	}
+	Success(c, data)
+}