refactor: change folder location for Backup and Extracted (#3282)

Author: unatried

src/cmd/cmd.go

@@ -15,7 +15,7 @@ import (
 var (
 	spicetifyFolder         = utils.GetSpicetifyFolder()
 	rawFolder, themedFolder = getExtractFolder()
-	backupFolder            = utils.GetUserFolder("Backup")
+	backupFolder            = utils.GetStateFolder("Backup")
 	userThemesFolder        = utils.GetUserFolder("Themes")
 	quiet                   bool
 	isAppX                  = false
@@ -205,7 +205,7 @@ func GetSpotifyPath() string {
 }
 
 func getExtractFolder() (string, string) {
-	dir := utils.GetUserFolder("Extracted")
+	dir := utils.GetStateFolder("Extracted")
 
 	raw := filepath.Join(dir, "Raw")
 	utils.CheckExistAndCreate(raw)

src/utils/path-utils.go

@@ -65,6 +65,36 @@ func GetSpicetifyFolder() string {
 	return result
 }
 
+func GetStateFolder(name string) string {
+	result, isAvailable := os.LookupEnv("SPICETIFY_STATE")
+	defer func() { CheckExistAndCreate(result) }()
+
+	if isAvailable && len(result) > 0 {
+		return result
+	}
+
+	if runtime.GOOS == "windows" {
+		parent := os.Getenv("APPDATA")
+
+		result = filepath.Join(parent, "spicetify")
+	} else if runtime.GOOS == "linux" {
+		parent, isAvailable := os.LookupEnv("XDG_STATE_HOME")
+
+		if !isAvailable || len(parent) == 0 {
+			parent = filepath.Join(os.Getenv("HOME"), ".local", "state")
+			CheckExistAndCreate(parent)
+		}
+
+		result = filepath.Join(parent, "spicetify")
+	} else if runtime.GOOS == "darwin" {
+		parent := filepath.Join(os.Getenv("HOME"), ".local", "state")
+		CheckExistAndCreate(parent)
+
+		result = filepath.Join(parent, "spicetify")
+	}
+	return result
+}
+
 // getUserFolder checks if folder `name` is available in spicetifyFolder,
 // else creates then returns the path.
 func GetUserFolder(name string) string {