Enforce pricelist write checks and auto-restart on DB settings change

cmd/qfs/main.go

@@ -165,7 +165,9 @@ func main() {
 	}
 
 	gin.SetMode(cfg.Server.Mode)
-	router, syncService, err := setupRouter(cfg, local, connMgr, mariaDB, dbUser)
+	restartSig := make(chan struct{}, 1)
+
+	router, syncService, err := setupRouter(cfg, local, connMgr, mariaDB, dbUser, restartSig)
 	if err != nil {
 		slog.Error("failed to setup router", "error", err)
 		os.Exit(1)
@@ -207,9 +209,15 @@ func main() {
 
 	quit := make(chan os.Signal, 1)
 	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
-	<-quit
 
-	slog.Info("shutting down server...")
+	shouldRestart := false
+	select {
+	case <-quit:
+		slog.Info("shutting down server...")
+	case <-restartSig:
+		shouldRestart = true
+		slog.Info("restarting application after connection settings update...")
+	}
 
 	// Stop background sync worker first
 	syncWorker.Stop()
@@ -224,6 +232,10 @@ func main() {
 	}
 
 	slog.Info("server stopped")
+
+	if shouldRestart {
+		restartProcess()
+	}
 }
 
 func setConfigDefaults(cfg *config.Config) {
@@ -394,7 +406,7 @@ func setupDatabaseFromDSN(dsn string) (*gorm.DB, error) {
 	return db, nil
 }
 
-func setupRouter(cfg *config.Config, local *localdb.LocalDB, connMgr *db.ConnectionManager, mariaDB *gorm.DB, dbUsername string) (*gin.Engine, *sync.Service, error) {
+func setupRouter(cfg *config.Config, local *localdb.LocalDB, connMgr *db.ConnectionManager, mariaDB *gorm.DB, dbUsername string, restartSig chan struct{}) (*gin.Engine, *sync.Service, error) {
 	// mariaDB may be nil if we're in offline mode
 
 	// Repositories
@@ -469,8 +481,8 @@ func setupRouter(cfg *config.Config, local *localdb.LocalDB, connMgr *db.Connect
 		return nil, nil, fmt.Errorf("creating sync handler: %w", err)
 	}
 
-	// Setup handler (for reconfiguration) - no restart signal in normal mode
-	setupHandler, err := handlers.NewSetupHandler(local, connMgr, templatesPath, nil)
+	// Setup handler (for reconfiguration)
+	setupHandler, err := handlers.NewSetupHandler(local, connMgr, templatesPath, restartSig)
 	if err != nil {
 		return nil, nil, fmt.Errorf("creating setup handler: %w", err)
 	}

cmd/qfs/versioning_api_test.go

@@ -37,7 +37,7 @@ func TestConfigurationVersioningAPI(t *testing.T) {
 
 	cfg := &config.Config{}
 	setConfigDefaults(cfg)
-	router, _, err := setupRouter(cfg, local, connMgr, nil, "tester")
+	router, _, err := setupRouter(cfg, local, connMgr, nil, "tester", nil)
 	if err != nil {
 		t.Fatalf("setup router: %v", err)
 	}