feat: user buy media

backend/pkg/errorx/error.go

@@ -2,18 +2,31 @@ package errorx
 
 import (
 	"fmt"
+	"net/http"
+
+	"github.com/gofiber/fiber/v3"
 )
 
 type Response struct {
-	Code    int    `json:"code"`
-	Message string `json:"message"`
+	StatusCode int    `json:"-"`
+	Code       int    `json:"code"`
+	Message    string `json:"message"`
+}
+
+func Wrap(err error) Response {
+	return Response{http.StatusInternalServerError, http.StatusInternalServerError, err.Error()}
 }
 
 func (r Response) Error() string {
-	return fmt.Sprintf("%d: %s", r.Code, r.Message)
+	return fmt.Sprintf("[%d] %s", r.Code, r.Message)
+}
+
+func (r Response) Response(ctx fiber.Ctx) error {
+	return ctx.Status(r.Code).JSON(r)
 }
 
 var (
-	RequestParseError = Response{400, "请求解析错误"}
-	InternalError     = Response{500, "内部错误"}
+	RequestParseError    = Response{http.StatusBadRequest, http.StatusBadRequest, "请求解析错误"}
+	InternalError        = Response{http.StatusInternalServerError, http.StatusInternalServerError, "内部错误"}
+	UserBalanceNotEnough = Response{http.StatusPaymentRequired, 1001, "余额不足，请充值"}
 )