First commit

1 files changed, 94 insertions, 0 deletions

diff --git a/server/core/json_response.go b/server/core/json_response.go
new file mode 100644
index 00000000..51a9ede8
--- /dev/null
+++ b/server/core/json_response.go
@@ -0,0 +1,94 @@
+// 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()
+	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
+}