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// Copyright 2017 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package core
import (
"encoding/json"
"errors"
"log"
"net/http"
)
type JsonResponse struct {
writer http.ResponseWriter
request *http.Request
}
func (j *JsonResponse) Standard(v interface{}) {
j.writer.WriteHeader(http.StatusOK)
j.commonHeaders()
j.writer.Write(j.toJSON(v))
}
func (j *JsonResponse) Created(v interface{}) {
j.writer.WriteHeader(http.StatusCreated)
j.commonHeaders()
j.writer.Write(j.toJSON(v))
}
func (j *JsonResponse) NoContent() {
j.writer.WriteHeader(http.StatusNoContent)
j.commonHeaders()
}
func (j *JsonResponse) BadRequest(err error) {
log.Println("[API:BadRequest]", err)
j.writer.WriteHeader(http.StatusBadRequest)
j.commonHeaders()
if err != nil {
j.writer.Write(j.encodeError(err))
}
}
func (j *JsonResponse) NotFound(err error) {
log.Println("[API:NotFound]", err)
j.writer.WriteHeader(http.StatusNotFound)
j.commonHeaders()
j.writer.Write(j.encodeError(err))
}
func (j *JsonResponse) ServerError(err error) {
log.Println("[API:ServerError]", err)
j.writer.WriteHeader(http.StatusInternalServerError)
j.commonHeaders()
if err != nil {
j.writer.Write(j.encodeError(err))
}
}
func (j *JsonResponse) Forbidden() {
log.Println("[API:Forbidden]")
j.writer.WriteHeader(http.StatusForbidden)
j.commonHeaders()
j.writer.Write(j.encodeError(errors.New("Access Forbidden")))
}
func (j *JsonResponse) commonHeaders() {
j.writer.Header().Set("Accept", "application/json")
j.writer.Header().Set("Content-Type", "application/json")
}
func (j *JsonResponse) encodeError(err error) []byte {
type errorMsg struct {
ErrorMessage string `json:"error_message"`
}
tmp := errorMsg{ErrorMessage: err.Error()}
data, err := json.Marshal(tmp)
if err != nil {
log.Println("encodeError:", err)
}
return data
}
func (j *JsonResponse) toJSON(v interface{}) []byte {
b, err := json.Marshal(v)
if err != nil {
log.Println("Unable to convert interface to JSON:", err)
return []byte("")
}
return b
}
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