Squash merge audio-player-component into main

backend/system/userdata.go

@@ -0,0 +1,81 @@
+// Package system provides OS-specific system utilities.
+package system
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/user"
+	"runtime"
+)
+
+var (
+	errNotDirectory  = errors.New("path is not a directory")
+	errUnsupportedOS = errors.New("unsupported operating system")
+)
+
+// dirType represents the type of user directory.
+type dirType string
+
+const (
+	dirTypeConfig dirType = "config"
+	dirTypeData   dirType = "data"
+)
+
+// getUserDirPath returns and creates the path for a user directory.
+func getUserDirPath(dt dirType) (string, error) {
+	currentUser, err := user.Current()
+	if err != nil {
+		return "", fmt.Errorf("could not get current user: %w", err)
+	}
+
+	path, err := buildUserDirPath(currentUser.Username, dt)
+	if err != nil {
+		return "", err
+	}
+
+	if err := os.MkdirAll(path, os.ModePerm); err != nil {
+		return "", fmt.Errorf("could not make user %s directory: %w", dt, err)
+	}
+
+	dirInfo, err := os.Stat(path)
+	if err != nil {
+		return "", fmt.Errorf("could not stat the user %s directory %s: %w", dt, path, err)
+	}
+
+	if !dirInfo.IsDir() {
+		return "", fmt.Errorf("%w: %s", errNotDirectory, path)
+	}
+
+	return path, nil
+}
+
+// buildUserDirPath constructs the OS-specific path for a user directory.
+func buildUserDirPath(username string, dt dirType) (string, error) {
+	// Map directory types to their Unix subdirectory paths
+	unixSubdirs := map[dirType]string{
+		dirTypeConfig: ".config",
+		dirTypeData:   ".local/share",
+	}
+
+	switch currentOS := runtime.GOOS; currentOS {
+	case "darwin":
+		return fmt.Sprintf("/Users/%s/%s/yellowjacket", username, unixSubdirs[dt]), nil
+	case "linux":
+		return fmt.Sprintf("/home/%s/%s/yellowjacket", username, unixSubdirs[dt]), nil
+	case "windows":
+		return fmt.Sprintf(`C:\Users\%s\AppData\local\yellowjacket\%s`, username, dt), nil
+	default:
+		return "", fmt.Errorf("%w: %s", errUnsupportedOS, currentOS)
+	}
+}
+
+// GetUserConfigDirPath returns the user config directory path.
+func GetUserConfigDirPath() (string, error) {
+	return getUserDirPath(dirTypeConfig)
+}
+
+// GetUserDataDirPath returns the user data directory path.
+func GetUserDataDirPath() (string, error) {
+	return getUserDirPath(dirTypeData)
+}