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/*
* Copyright 2018 Intel Corporation, Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package api
import (
"encoding/json"
"errors"
"io/ioutil"
"net/http"
)
var (
IoutilRead = ioutil.ReadFile
IoutilWrite = ioutil.WriteFile
JsonReader = ReadJSON
JsonChecker = CheckJSONExists
JsonCreate = CreateJSON
)
type Token_service_map struct {
Token string `json:"token"`
Service string `json:"service"`
}
func CheckJSONExists(path string) (bool, error) {
_, err := IoutilRead(path)
if err != nil {
return false, err
} else {
return true, nil
}
}
func CreateJSON(path string) error {
var tsm Token_service_map
var tsm_list []Token_service_map
tsm.Token = "default"
tsm.Service = "default"
tsm_list = append(tsm_list, tsm)
raw, err := json.Marshal(tsm_list)
if err != nil {
return err
}
err = IoutilWrite(path, raw, 0644)
if err != nil {
return err
}
return nil
}
func ReadJSON(path string) ([]Token_service_map, error) {
var tsm_list []Token_service_map
// raw, err := ioutil.ReadFile("./token_service_map.json")
raw, err := IoutilRead(path)
if err != nil {
return tsm_list, err
}
json.Unmarshal(raw, &tsm_list)
return tsm_list, nil
}
func WriteJSON(path string, token string, service string) error {
tsm_list, err := JsonReader(path)
if err != nil {
return err
}
var tsm Token_service_map
tsm.Token = token
tsm.Service = service
tsm_list = append(tsm_list, tsm)
raw, err := json.Marshal(tsm_list)
if err != nil {
return err
}
err = IoutilWrite(path, raw, 0644)
if err != nil {
return err
}
return nil
}
func DeleteInJSON(path string, token string) error {
serviceList, err := JsonReader(path)
if err != nil {
return err
}
var resultList []Token_service_map
var foundFlag = false
// Linear search for the token. If found set found flag. If not, keep
// copying the different values to resultList.
for _, service := range serviceList {
if service.Token == token {
foundFlag = true
} else {
resultList = append(resultList, service)
}
}
if foundFlag == false {
return errors.New("Service not found. Check if Token is correct or service is registered.")
} else {
// This is done to avoid writing 'null' in the json file.
if len(serviceList) == 1 {
dummy := Token_service_map{Token: "", Service: ""}
resultList = append(resultList, dummy)
}
raw, err := json.Marshal(resultList)
if err != nil {
return err
}
err = IoutilWrite(path, raw, 0644)
if err != nil {
return err
}
return nil
}
}
func FindTokenInJSON(path string, token string) (bool, error) {
serviceList, err := JsonReader(path)
if err != nil {
return false, err
}
for _, service := range serviceList {
if service.Token == token {
return true, nil
}
}
return false, nil
}
func FindServiceInJSON(path string, serviceName string) (bool, error) {
serviceList, err := JsonReader(path)
if err != nil {
return false, err
}
for _, service := range serviceList {
if service.Service == serviceName {
return true, nil
}
}
return false, nil
}
func GetServicebyToken(path string, token string) (string, bool, error) {
serviceList, err := JsonReader(path)
if err != nil {
return "", false, err
}
for _, service := range serviceList {
if service.Token == token {
return service.Service, true, nil
}
}
return "", false, nil
}
func GenerateResponse(w http.ResponseWriter, r *http.Request, httpStatus int, msg string) {
req := ResponseStringStruct{Response: msg}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(httpStatus)
json.NewEncoder(w).Encode(req)
}
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