SimpleCloudNotifier/server/config.go

package server

import (
	"fmt"
	"github.com/rs/zerolog/log"
	"os"
	"time"
)

type Config struct {
	Namespace          string
	GinDebug           bool
	ServerIP           string
	ServerPort         string
	DBFile             string
	RequestTimeout     time.Duration
	ReturnRawErrors    bool
	FirebaseTokenURI   string
	FirebaseProjectID  string
	FirebasePrivKeyID  string
	FirebaseClientMail string
	FirebasePrivateKey string
}

var Conf Config

var configLocHost = Config{
	Namespace:          "local-host",
	GinDebug:           true,
	ServerIP:           "0.0.0.0",
	ServerPort:         "8080",
	DBFile:             ".run-data/db.sqlite3",
	RequestTimeout:     16 * time.Second,
	ReturnRawErrors:    true,
	FirebaseTokenURI:   "https://oauth2.googleapis.com/token",
	FirebaseProjectID:  "",
	FirebasePrivKeyID:  "",
	FirebaseClientMail: "",
	FirebasePrivateKey: "",
}

var configLocDocker = Config{
	Namespace:          "local-docker",
	GinDebug:           true,
	ServerIP:           "0.0.0.0",
	ServerPort:         "80",
	DBFile:             "/data/scn_docker.sqlite3",
	RequestTimeout:     16 * time.Second,
	ReturnRawErrors:    true,
	FirebaseTokenURI:   "https://oauth2.googleapis.com/token",
	FirebaseProjectID:  "",
	FirebasePrivKeyID:  "",
	FirebaseClientMail: "",
	FirebasePrivateKey: "",
}

var configDev = Config{
	Namespace:          "develop",
	GinDebug:           true,
	ServerIP:           "0.0.0.0",
	ServerPort:         "80",
	DBFile:             "/data/scn.sqlite3",
	RequestTimeout:     16 * time.Second,
	ReturnRawErrors:    true,
	FirebaseTokenURI:   "https://oauth2.googleapis.com/token",
	FirebaseProjectID:  confEnv("FB_PROJECTID"),
	FirebasePrivKeyID:  confEnv("FB_PRIVATEKEYID"),
	FirebaseClientMail: confEnv("FB_CLIENTEMAIL"),
	FirebasePrivateKey: confEnv("FB_PRIVATEKEY"),
}

var configStag = Config{
	Namespace:          "staging",
	GinDebug:           true,
	ServerIP:           "0.0.0.0",
	ServerPort:         "80",
	DBFile:             "/data/scn.sqlite3",
	RequestTimeout:     16 * time.Second,
	ReturnRawErrors:    true,
	FirebaseTokenURI:   "https://oauth2.googleapis.com/token",
	FirebaseProjectID:  confEnv("FB_PROJECTID"),
	FirebasePrivKeyID:  confEnv("FB_PRIVATEKEYID"),
	FirebaseClientMail: confEnv("FB_CLIENTEMAIL"),
	FirebasePrivateKey: confEnv("FB_PRIVATEKEY"),
}

var configProd = Config{
	Namespace:          "production",
	GinDebug:           false,
	ServerIP:           "0.0.0.0",
	ServerPort:         "80",
	DBFile:             "/data/scn.sqlite3",
	RequestTimeout:     16 * time.Second,
	ReturnRawErrors:    false,
	FirebaseTokenURI:   "https://oauth2.googleapis.com/token",
	FirebaseProjectID:  confEnv("FB_PROJECTID"),
	FirebasePrivKeyID:  confEnv("FB_PRIVATEKEYID"),
	FirebaseClientMail: confEnv("FB_CLIENTEMAIL"),
	FirebasePrivateKey: confEnv("FB_PRIVATEKEY"),
}

var allConfig = []Config{
	configLocHost,
	configLocDocker,
	configDev,
	configStag,
	configProd,
}

func getConfig(ns string) (Config, bool) {
	if ns == "" {
		return configLocHost, true
	}
	for _, c := range allConfig {
		if c.Namespace == ns {
			return c, true
		}
	}
	return Config{}, false
}

func confEnv(key string) string {
	if v, ok := os.LookupEnv(key); ok {
		return v
	} else {
		panic(fmt.Sprintf("Missing required environment variable '%s'", key))
	}
}

func init() {
	ns := os.Getenv("CONF_NS")

	cfg, ok := getConfig(ns)
	if !ok {
		log.Fatal().Str("ns", ns).Msg("Unknown config-namespace")
	}

	Conf = cfg
}