132 lines
3.1 KiB
Go
132 lines
3.1 KiB
Go
package config
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import (
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"context"
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"flag"
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"log"
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"os"
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"strconv"
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"github.com/joho/godotenv"
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)
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const LOCAL_ENV = ".env.local"
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type Nats struct {
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Url string
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Name string
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VerifyCertificates bool
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Ctx context.Context
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}
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type Mongo struct {
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Uri string
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Ctx context.Context
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}
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type RestApi struct {
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Port string
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Ctx context.Context
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}
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type Enterprise struct {
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Enable bool
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SupportPassword string
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SupportEmail string
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}
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type Config struct {
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RestApi RestApi
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Nats Nats
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Mongo Mongo
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Enterprise Enterprise
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}
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func NewConfig() *Config {
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loadEnvVariables()
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log.SetFlags(log.LstdFlags | log.Lshortfile)
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natsUrl := flag.String("nats_url", lookupEnvOrString("NATS_URL", "nats://localhost:4222"), "url for nats server")
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natsName := flag.String("nats_name", lookupEnvOrString("NATS_NAME", "controller"), "name for nats client")
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natsVerifyCertificates := flag.Bool("nats_verify_certificates", lookupEnvOrBool("NATS_VERIFY_CERTIFICATES", false), "verify validity of certificates from nats server")
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flApiPort := flag.String("api_port", lookupEnvOrString("REST_API_PORT", "8000"), "Rest api port")
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mongoUri := flag.String("mongo_uri", lookupEnvOrString("MONGO_URI", "mongodb://localhost:27017"), "uri for mongodb server")
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enterpise := flag.Bool("enterprise", lookupEnvOrBool("ENTERPRISE", false), "enterprise version enable")
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enterprise_support_password := flag.String("enterprise_support_password", lookupEnvOrString("ENTERPRISE_SUPPORT_PASSWORD", ""), "enterprise support password")
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enterpise_support_email := flag.String("enterprise_support_email", lookupEnvOrString("ENTERPRISE_SUPPORT_EMAIL", ""), "enterprise support email")
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flHelp := flag.Bool("help", false, "Help")
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/*
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App variables priority:
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1º - Flag through command line.
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2º - Env variables.
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3º - Default flag value.
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*/
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flag.Parse()
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if *flHelp {
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flag.Usage()
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os.Exit(0)
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}
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ctx := context.TODO()
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return &Config{
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RestApi: RestApi{
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Port: *flApiPort,
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Ctx: ctx,
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},
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Nats: Nats{
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Url: *natsUrl,
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Name: *natsName,
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VerifyCertificates: *natsVerifyCertificates,
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Ctx: ctx,
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},
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Mongo: Mongo{
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Uri: *mongoUri,
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Ctx: ctx,
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},
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Enterprise: Enterprise{
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Enable: *enterpise,
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SupportPassword: *enterprise_support_password,
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SupportEmail: *enterpise_support_email,
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},
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}
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}
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func loadEnvVariables() {
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err := godotenv.Load()
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if _, err := os.Stat(LOCAL_ENV); err == nil {
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_ = godotenv.Overload(LOCAL_ENV)
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log.Printf("Loaded variables from '%s'", LOCAL_ENV)
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return
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}
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if err != nil {
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log.Println("Error to load environment variables:", err)
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} else {
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log.Println("Loaded variables from '.env'")
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}
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}
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func lookupEnvOrString(key string, defaultVal string) string {
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if val, _ := os.LookupEnv(key); val != "" {
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return val
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}
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return defaultVal
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}
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func lookupEnvOrBool(key string, defaultVal bool) bool {
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if val, _ := os.LookupEnv(key); val != "" {
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v, err := strconv.ParseBool(val)
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if err != nil {
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log.Fatalf("LookupEnvOrBool[%s]: %v", key, err)
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}
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return v
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}
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return defaultVal
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}
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