第 4 阶段：订单、交接与账务--ok

backend/internal/modules/wallet/handler.go

@@ -0,0 +1,64 @@
+package wallet
+
+import (
+	"errors"
+
+	"hfb_sys/backend/internal/middleware"
+	"hfb_sys/backend/pkg/response"
+
+	"github.com/gin-gonic/gin"
+)
+
+type Handler struct {
+	service *Service
+}
+
+func NewHandler(service *Service) *Handler {
+	return &Handler{service: service}
+}
+
+func (h *Handler) Balance(c *gin.Context) {
+	userID, ok := currentUserID(c)
+	if !ok {
+		response.Unauthorized(c, "缺少用户上下文")
+		return
+	}
+	account, err := h.service.Account(userID)
+	if err != nil {
+		writeWalletError(c, err)
+		return
+	}
+	response.OK(c, account)
+}
+
+func (h *Handler) Ledger(c *gin.Context) {
+	userID, ok := currentUserID(c)
+	if !ok {
+		response.Unauthorized(c, "缺少用户上下文")
+		return
+	}
+	items, err := h.service.Ledger(userID)
+	if err != nil {
+		writeWalletError(c, err)
+		return
+	}
+	response.OK(c, gin.H{"items": items})
+}
+
+func currentUserID(c *gin.Context) (uint64, bool) {
+	value, ok := c.Get(middleware.ContextUserID)
+	if !ok {
+		return 0, false
+	}
+	userID, ok := value.(uint64)
+	return userID, ok
+}
+
+func writeWalletError(c *gin.Context, err error) {
+	switch {
+	case errors.Is(err, ErrDependencyUnavailable):
+		response.ServiceUnavailable(c, "数据库未连接")
+	default:
+		response.ServiceUnavailable(c, "钱包服务暂时不可用")
+	}
+}