feat #4: add storage config in config file

polyculeconnect/config/config.go

@@ -40,12 +40,19 @@ const (
 	ModeNet
 )
 
+type BackendConfigType string
+
+const (
+	Memory BackendConfigType = "memory"
+	SQLite BackendConfigType = "sqlite"
+)
+
 type BackendConfig struct {
-	Config *oidc.Config `json:"config"`
-	Name   string       `json:"name"`
-	ID     string       `json:"ID"`
-	Type   string       `json:"type"`
-	Local  bool         `json:"local"`
+	Config *oidc.Config      `json:"config"`
+	Name   string            `json:"name"`
+	ID     string            `json:"ID"`
+	Type   BackendConfigType `json:"type"`
+	Local  bool              `json:"local"`
 }
 
 type OpenConnectConfig struct {
@@ -54,6 +61,19 @@ type OpenConnectConfig struct {
 	Issuer         string            `json:"issuer"`
 }
 
+type StorageConfig struct {
+	File     string `json:"file"`
+	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 +84,10 @@ type jsonConf struct {
 		Mode     string `json:"mode"`
 		SockPath string `json:"sock"`
 	} `json:"server"`
+	Storage struct {
+		StorageType string         `json:"type"`
+		Config      *StorageConfig `json:"config"`
+	} `json:"storage"`
 	OpenConnectConfig *OpenConnectConfig `json:"openconnect"`
 }
 
@@ -73,6 +97,8 @@ type AppConfig struct {
 	Host              string
 	Port              int
 	SockPath          string
+	StorageType       string
+	StorageConfig     *StorageConfig
 	OpenConnectConfig *OpenConnectConfig
 }
 
@@ -102,14 +128,17 @@ 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.Config
 	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

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"flag"
+	"fmt"
 	"os"
 	"os/signal"
 	"time"
@@ -34,6 +35,17 @@ func parseArgs() *cliArgs {
 	}
 }
 
+func initStorage(conf *config.AppConfig) (storage.Storage, error) {
+	var storageType storage.Storage
+	switch conf.StorageType {
+	case "memory":
+		storageType = memory.New(logger.L)
+	default:
+		return storageType, fmt.Errorf("unsupported storage backend type: %s", conf.StorageType)
+	}
+	return storageType, nil
+}
+
 func main() {
 	args := parseArgs()
 
@@ -47,12 +59,17 @@ func main() {
 	logger.Init(conf.LogLevel)
 	logger.L.Infof("Initialized logger with level %v", conf.LogLevel)
 
+	storageType, err := initStorage(conf)
+	if err != nil {
+		logger.L.Fatalf("Failed to initialize storage backend: %s", err.Error())
+	}
+	logger.L.Infof("Initialized storage backend %q", 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,
@@ -82,7 +99,7 @@ func main() {
 		if err := dexConf.Storage.CreateConnector(storage.Connector{
 			ID:     backend.ID,
 			Name:   backend.Name,
-			Type:   backend.Type,
+			Type:   string(backend.Type),
 			Config: backendConfJson,
 		}); err != nil {
 			logger.L.Errorf("Failed to add connector for backend %q to stage: %s", backend.Name, err.Error())