api.go

package middleware

import (
	"io"
	"net/http"
)


type MiddlewareResponse struct {
	isError      bool
	error        error
	responseSpec *responseSpec
}

type MiddlewareValue interface {
	Present() bool
	Value() interface{}
}

func NewErrorResult(err error) *MiddlewareResponse {
	return &MiddlewareResponse{isError: true, error: err}
}

type responseSpec struct {
	Header      http.Header
	StatusCode  int
	// TODO
}

func Response(
	statusCode int,
	body io.Reader,
	header http.Header,
) *MiddlewareResponse {
	return &MiddlewareResponse{
		responseSpec: &responseSpec{
			Header:      header,
			StatusCode:  statusCode,
		},
	}
}

func DefaultRespond(overide *MiddlewareResponse, res http.ResponseWriter) {
	if overide == nil {
		// programming error
		res.WriteHeader(500)
		res.Write([]byte("Server Misconfigured"))
		return
	}
	if overide.isError {
		// handle error
		res.WriteHeader(500)
		res.Write([]byte("Server Error"))
		return
	}
	// set headers, etc
	res.WriteHeader(overide.responseSpec.StatusCode)
	res.Write([]byte{})
}