LocalhostBunny/config.go

package bunny

import (
	"github.com/rs/xid"
	"github.com/rs/zerolog"
	"github.com/rs/zerolog/log"
	"gogs.mikescher.com/BlackForestBytes/goext/confext"
	"os"
	"time"
)

const APILevel = 1

var SelfProcessID int

type Config struct {
	Namespace             string
	GinDebug              bool          `env:"GINDEBUG"`
	ReturnRawErrors       bool          `env:"RETURNERRORS"`
	Custom404             bool          `env:"CUSTOM404"`
	LogLevel              zerolog.Level `env:"LOGLEVEL"`
	ServerIP              string        `env:"IP"`
	ServerPort            int           `env:"PORT"`
	RequestTimeout        time.Duration `env:"REQUEST_TIMEOUT"`
	Cors                  bool          `env:"CORS"`
	VerifyConnTimeoutHTML time.Duration `env:"VERIFY_CONN_TIMEOUT_HTML"`
	VerifyConnTimeoutAPI  time.Duration `env:"VERIFY_CONN_TIMEOUT_API"`
	LiveReload            *string       `env:"LIVERELOAD"`
	CacheDuration         time.Duration `env:"CACHE_DURATION"`
}

var Conf Config

var configLocHost = func() Config {
	return Config{
		Namespace:             "local",
		GinDebug:              true,
		ServerIP:              "0.0.0.0",
		ServerPort:            80,
		Custom404:             true,
		ReturnRawErrors:       true,
		RequestTimeout:        16 * time.Second,
		LogLevel:              zerolog.DebugLevel,
		Cors:                  true,
		VerifyConnTimeoutAPI:  2 * time.Second,
		VerifyConnTimeoutHTML: 500 * time.Millisecond,
		LiveReload:            nil,
		CacheDuration:         8 * time.Second,
	}
}

var configLocDocker = func() Config {
	return Config{
		Namespace:             "local-docker",
		GinDebug:              true,
		ServerIP:              "0.0.0.0",
		ServerPort:            80,
		Custom404:             true,
		ReturnRawErrors:       true,
		RequestTimeout:        16 * time.Second,
		LogLevel:              zerolog.DebugLevel,
		Cors:                  true,
		VerifyConnTimeoutAPI:  2 * time.Second,
		VerifyConnTimeoutHTML: 500 * time.Millisecond,
		LiveReload:            nil,
		CacheDuration:         8 * time.Second,
	}
}

var configDev = func() Config {
	return Config{
		Namespace:             "develop",
		GinDebug:              true,
		ServerIP:              "0.0.0.0",
		ServerPort:            80,
		Custom404:             false,
		ReturnRawErrors:       false,
		RequestTimeout:        16 * time.Second,
		LogLevel:              zerolog.DebugLevel,
		Cors:                  false,
		VerifyConnTimeoutAPI:  2 * time.Second,
		VerifyConnTimeoutHTML: 500 * time.Millisecond,
		LiveReload:            nil,
		CacheDuration:         8 * time.Second,
	}
}

var configStag = func() Config {
	return Config{
		Namespace:             "staging",
		GinDebug:              true,
		ServerIP:              "0.0.0.0",
		ServerPort:            80,
		Custom404:             false,
		ReturnRawErrors:       false,
		RequestTimeout:        16 * time.Second,
		LogLevel:              zerolog.DebugLevel,
		Cors:                  false,
		VerifyConnTimeoutAPI:  2 * time.Second,
		VerifyConnTimeoutHTML: 500 * time.Millisecond,
		LiveReload:            nil,
		CacheDuration:         8 * time.Second,
	}
}

var configProd = func() Config {
	return Config{
		Namespace:             "production",
		GinDebug:              false,
		ServerIP:              "0.0.0.0",
		ServerPort:            80,
		Custom404:             false,
		ReturnRawErrors:       false,
		RequestTimeout:        16 * time.Second,
		LogLevel:              zerolog.InfoLevel,
		Cors:                  false,
		VerifyConnTimeoutAPI:  2 * time.Second,
		VerifyConnTimeoutHTML: 500 * time.Millisecond,
		LiveReload:            nil,
		CacheDuration:         8 * time.Second,
	}
}

var allConfig = map[string]func() Config{
	"local-host":   configLocHost,
	"local-docker": configLocDocker,
	"develop":      configDev,
	"staging":      configStag,
	"production":   configProd,
}

var instID xid.ID

func InstanceID() string {
	return instID.String()
}

func getConfig(ns string) (Config, bool) {
	if ns == "" {
		ns = "production"
	}
	if cfn, ok := allConfig[ns]; ok {
		c := cfn()
		err := confext.ApplyEnvOverrides("BUNNY_", &c, "_")
		if err != nil {
			panic(err)
		}
		return c, true
	}
	return Config{}, false
}

func init() {
	instID = xid.New()

	ns := os.Getenv("CONF_NS")

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

	Conf = cfg

	SelfProcessID = os.Getpid()
}