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119 lines
3.1 KiB
119 lines
3.1 KiB
package util
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"reflect"
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"strconv"
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"github.com/sirupsen/logrus"
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"github.com/pkg/errors"
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"gopkg.in/yaml.v2"
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)
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type Configuration struct {
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ListenAddr string `yaml:"ListenAddr" env:"LISTEN_ADDR"`
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BaseURL string `yaml:"BaseURL" env:"BASE_URL"`
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DataDir string `yaml:"DataDir" env:"DATA_DIR"`
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EnableDebugMode bool `yaml:"EnableDebugMode" env:"ENABLE_DEBUG_MODE"`
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ShortedIDLength int `yaml:"ShortedIDLength" env:"SHORTED_ID_LENGTH"`
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Google oAuthConf `yaml:"Google" env:"GOOGLE"`
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GitHub oAuthConf `yaml:"GitHub" env:"GITHUB"`
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Microsoft oAuthConf `yaml:"Microsoft" env:"MICROSOFT"`
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}
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type oAuthConf struct {
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ClientID string `yaml:"ClientID" env:"CLIENT_ID"`
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ClientSecret string `yaml:"ClientSecret" env:"CLIENT_SECRET"`
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}
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var (
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config = Configuration{
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ListenAddr: ":8080",
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BaseURL: "http://localhost:3000",
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DataDir: "data",
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EnableDebugMode: false,
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ShortedIDLength: 4,
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}
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)
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// ReadInConfig loads the Configuration and other needed folders for further usage
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func ReadInConfig() error {
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file, err := ioutil.ReadFile("config.yaml")
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if err == nil {
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if err := yaml.Unmarshal(file, &config); err != nil {
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return errors.Wrap(err, "could not unmarshal yaml file")
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}
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} else if !os.IsNotExist(err) {
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return errors.Wrap(err, "could not read config file")
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}
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if err := config.ApplyEnvironmentConfig(); err != nil {
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return errors.Wrap(err, "could not apply environment configuration")
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}
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config.DataDir, err = filepath.Abs(config.DataDir)
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if err != nil {
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return errors.Wrap(err, "could not get relative data dir path")
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}
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if _, err = os.Stat(config.DataDir); os.IsNotExist(err) {
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if err = os.MkdirAll(config.DataDir, 0755); err != nil {
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return errors.Wrap(err, "could not create config directory")
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}
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}
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return nil
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}
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func (c *Configuration) ApplyEnvironmentConfig() error {
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return c.setDefaultValue(reflect.ValueOf(c), reflect.TypeOf(*c), reflect.StructField{}, "GUS")
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}
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func (c *Configuration) setDefaultValue(v reflect.Value, t reflect.Type, f reflect.StructField, prefix string) error {
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if v.Kind() != reflect.Ptr {
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return errors.New("Not a pointer value")
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}
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v = reflect.Indirect(v)
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fieldEnv, exists := f.Tag.Lookup("env")
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env := os.Getenv(prefix + fieldEnv)
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if exists && env != "" {
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switch v.Kind() {
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case reflect.Int:
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envI, err := strconv.Atoi(env)
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if err != nil {
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logrus.Warningf("could not parse to int: %v", err)
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break
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}
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v.SetInt(int64(envI))
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case reflect.String:
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v.SetString(env)
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case reflect.Bool:
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envB, err := strconv.ParseBool(env)
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if err != nil {
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logrus.Warningf("could not parse to bool: %v", err)
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break
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}
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v.SetBool(envB)
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}
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}
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if v.Kind() == reflect.Struct {
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// Iterate over the struct fields
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for i := 0; i < v.NumField(); i++ {
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if err := c.setDefaultValue(v.Field(i).Addr(), t, t.Field(i), prefix+fieldEnv+"_"); err != nil {
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return err
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}
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}
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}
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return nil
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}
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func (o oAuthConf) Enabled() bool {
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return o.ClientSecret != ""
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}
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func GetConfig() Configuration {
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return config
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}
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func SetConfig(c Configuration) {
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config = c
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}
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