feat #4: add storage config in config file

polyculeconnect/config/config.go

@@ -54,6 +54,18 @@ type OpenConnectConfig struct {
 	Issuer         string            `json:"issuer"`
 }
 
+type StorageConfigConfig struct {
+	Host     string `json:"host"`
+	Port     int    `json:"port"`
+	Database string `json:"database"`
+	User     string `json:"user"`
+	Password string `json:"password"`
+	Ssl      struct {
+		Mode   string `json:"mode"`
+		CaFile string `json:"caFile"`
+	} `json:"ssl"`
+}
+
 type jsonConf struct {
 	Log struct {
 		Level string `json:"level"`
@@ -64,6 +76,10 @@ type jsonConf struct {
 		Mode     string `json:"mode"`
 		SockPath string `json:"sock"`
 	} `json:"server"`
+	Storage struct {
+		StorageType   string               `json:"type"`
+		StorageConfig *StorageConfigConfig `json:"config"`
+	} `json:"storage"`
 	OpenConnectConfig *OpenConnectConfig `json:"openconnect"`
 }
 
@@ -73,6 +89,8 @@ type AppConfig struct {
 	Host              string
 	Port              int
 	SockPath          string
+	StorageType       string
+	StorageConfig     *StorageConfigConfig
 	OpenConnectConfig *OpenConnectConfig
 }
 
@@ -102,14 +120,17 @@ func (ac *AppConfig) UnmarshalJSON(data []byte) error {
 	ac.Host = jsonConf.Server.Host
 	ac.Port = jsonConf.Server.Port
 	ac.OpenConnectConfig = jsonConf.OpenConnectConfig
+	ac.StorageType = jsonConf.Storage.StorageType
+	ac.StorageConfig = jsonConf.Storage.StorageConfig
 	return nil
 }
 
 var defaultConfig AppConfig = AppConfig{
-	LogLevel:   logrus.InfoLevel,
-	ServerMode: ModeNet,
-	Host:       "0.0.0.0",
-	Port:       5000,
+	LogLevel:    logrus.InfoLevel,
+	ServerMode:  ModeNet,
+	Host:        "0.0.0.0",
+	Port:        5000,
+	StorageType: "memory",
 }
 
 func New(filepath string) (*AppConfig, error) {

polyculeconnect/main.go

@@ -47,12 +47,22 @@ func main() {
 	logger.Init(conf.LogLevel)
 	logger.L.Infof("Initialized logger with level %v", conf.LogLevel)
 
+	var storageType storage.Storage
+	switch conf.StorageType {
+	case "memory":
+		storageType = memory.New(logger.L)
+	default:
+		logger.L.Fatalf("Unsupported storage backend type: %s", conf.StorageType)
+	}
+
+	logger.L.Infof("Initialized storage backend \"%s\"", conf.StorageType)
+
 	dexConf := dex_server.Config{
 		Web: dex_server.WebConfig{
 			Dir:   "./",
 			Theme: "default",
 		},
-		Storage:                memory.New(logger.L),
+		Storage:                storageType,
 		Issuer:                 conf.OpenConnectConfig.Issuer,
 		SupportedResponseTypes: []string{"code"},
 		SkipApprovalScreen:     false,