Extract function for loading profile files

app/app.go

@@ -51,12 +51,32 @@ func New(options Options) (*App, error) {
 		return nil, errors.New("Title format string syntax error")
 	}
 
+	prefMap, err := loadProfileFile(options)
+	if err != nil {
+		return nil, err
+	}
+
+	return &App{
+		options: options,
+
+		upgrader: &websocket.Upgrader{
+			ReadBufferSize:  1024,
+			WriteBufferSize: 1024,
+			Subprotocols:    []string{"gotty"},
+		},
+
+		preferences:   prefMap,
+		titleTemplate: titleTemplate,
+	}, nil
+}
+
+func loadProfileFile(options Options) (map[string]interface{}, error) {
 	prefString := []byte{}
 	prefPath := options.ProfileFile
 	if options.ProfileFile == DefaultProfileFilePath {
 		prefPath = os.Getenv("HOME") + "/.gotty"
 	}
-	if _, err = os.Stat(prefPath); os.IsNotExist(err) {
+	if _, err := os.Stat(prefPath); os.IsNotExist(err) {
 		if options.ProfileFile != DefaultProfileFilePath {
 			return nil, err
 		}
@@ -68,23 +88,11 @@ func New(options Options) (*App, error) {
 		prefString = []byte(("{}"))
 	}
 	var prefMap map[string]interface{}
-	err = json.Unmarshal(prefString, &prefMap)
+	err := json.Unmarshal(prefString, &prefMap)
 	if err != nil {
 		return nil, err
 	}
-
-	return &App{
-		options: options,
-
-		upgrader: &websocket.Upgrader{
-			ReadBufferSize:  1024,
-			WriteBufferSize: 1024,
-			Subprotocols:    []string{"gotty"},
-		},
-
-		preferences:   prefMap,
-		titleTemplate: titleTemplate,
-	}, nil
+	return prefMap, nil
 }
 
 func (app *App) Run() error {