config.go

package config

import (
  "os"
  "fmt"
  "encoding/json"
  "path/filepath"
  "go_rest_api/pkg"
)


func GetConfig() *root.Config {
  configuration, err := loadConfig()
  if(err != nil) {
    fmt.Println("Unable to load config file, using defaults")
    configuration = getDefaultConfig()
    return configuration
  }
  return configuration
}

func loadConfig() (*root.Config,error) {
  dir, _ := filepath.Abs(filepath.Dir(os.Args[0]))
  file, err := os.Open(dir+"/config.json")
  if(err != nil) {
    return nil, err
  }
  decoder := json.NewDecoder(file)
  configuration := root.Config{}
  err = decoder.Decode(&configuration)
  return &configuration, err
}

func getDefaultConfig() *root.Config {
  return &root.Config {
    Mongo: &root.MongoConfig {
      Ip: "127.0.0.1:27017",
      DbName: "myDb" },
    Server: &root.ServerConfig { Port: ":1337"},
    Auth: &root.AuthConfig { Secret: "mysecret"} }
}