添加优惠券功能，实现价格计算

web/error.go

@@ -2,18 +2,32 @@ package web
 
 import (
 	"errors"
+	"log/slog"
+	"platform/web/common"
+	"reflect"
 
 	"github.com/gofiber/fiber/v2"
 )
 
 func ErrorHandler(c *fiber.Ctx, err error) error {
-	code := fiber.StatusInternalServerError
-	message := "服务器异常"
-	var e *fiber.Error
-	if errors.As(err, &e) {
-		code = e.Code
-		message = e.Message
+
+	var code int
+	var message string
+
+	var fiberErr *fiber.Error
+	var serviceErr common.ServiceErr
+	if errors.As(err, &fiberErr) {
+		code = fiberErr.Code
+		message = fiberErr.Message
+	} else if errors.As(err, &fiberErr) {
+		code = serviceErr.Code()
+		message = serviceErr.Error()
+	} else {
+		code = fiber.StatusInternalServerError
+		message = "服务器异常"
+		slog.Debug("未处理的异常", slog.String("type", reflect.TypeOf(err).Name()), slog.String("error", err.Error()))
 	}
+
 	c.Set(fiber.HeaderContentType, fiber.MIMETextPlainCharsetUTF8)
 	return c.Status(code).SendString(message)
 }