backend/pkg/api/param_validator.go

package api

import (
	"fmt"
	"github.com/go-playground/locales/zh_Hans_CN"
	ut "github.com/go-playground/universal-translator"
	"github.com/go-playground/validator/v10"
	zh_translations "github.com/go-playground/validator/v10/translations/zh"
	"github.com/gofiber/fiber/v2"
	"reflect"
	"strings"
)

var Validate *validator.Validate
var trans ut.Translator

func init() {
	Validate = validator.New()
	zh := zh_Hans_CN.New()
	uni := ut.New(zh, zh)
	var ok bool
	trans, ok = uni.GetTranslator("zh_Hans_CN")
	if !ok {
		panic(fmt.Errorf("uni.GetTranslator(%s) failed", "zh"))
	}
	Validate.RegisterTagNameFunc(func(field reflect.StructField) string {
		addWarp := func(tag string) string {
			return "[" + tag + "]"
		}
		if labelTag := field.Tag.Get("label"); labelTag != "" {
			return addWarp(labelTag)
		}
		if jsonTag := field.Tag.Get("json"); jsonTag != "" {
			return addWarp(jsonTag)
		}
		return addWarp(field.Name)
	})
	err := zh_translations.RegisterDefaultTranslations(Validate, trans)
	if err != nil {
		panic(err)
	}
}

func Bind(c *fiber.Ctx, out interface{}) error {
	if reflect.TypeOf(out).Kind() != reflect.Ptr {
		return NewFError("bind must ptr")
	}

	if err := c.BodyParser(out); err != nil {
		return WarpFError(err)
	}

	err := Validate.Struct(out)

	if err != nil {
		if errs, ok := err.(validator.ValidationErrors); ok {
			errString := make([]string, 0, len(errs))
			for _, fieldError := range errs.Translate(trans) {
				errString = append(errString, fieldError)
			}
			err = fmt.Errorf("%s", strings.Join(errString, ","))
		}
		return WarpFErrorWithCode(fiber.StatusBadRequest, err)
	}
	return nil
}