go-rel/gin-example

package handler

import (
    "errors"

    "github.com/gin-gonic/gin"
    "go.uber.org/zap"
)

var (
    logger, _ = zap.NewProduction(zap.Fields(zap.String("type", "handler")))
    // ErrBadRequest error.
    ErrBadRequest = errors.New("Bad Request")
)

func render(c *gin.Context, body interface{}, status int) {
    switch v := body.(type) {
    case string:
        c.JSON(status, struct {
            Message string `json:"message"`
        }{
            Message: v,
        })
    case error:
        c.JSON(status, struct {
            Error string `json:"error"`
        }{
            Error: v.Error(),
        })
    case nil:
        c.Status(status)
    default:
        c.JSON(status, body)
    }
}