create config file/directory if it doesn't exist yet

src/var.rs

@@ -31,6 +31,7 @@ pub const TOKEN_LESS_EQUALS: &str = "<=";
 pub const TOKEN_NEGATE: &str = "~";
 
 pub const DEFAULT_CHAT_SPEED: f32 = 10.0;
+pub const DEFAULT_CONFIG_TOML: &str = include_str!("data/outfly.toml");
 
 #[derive(Resource)]
 pub struct Settings {
@@ -472,6 +473,12 @@ fn file_is_readable(file_path: &str) -> bool {
         .unwrap_or(false)
 }
 
+fn path_is_directory(file_path: &str) -> bool {
+    fs::metadata(file_path)
+        .map(|metadata| metadata.is_dir())
+        .unwrap_or(false)
+}
+
 fn get_prefs_path() -> Option<String> {
     let test = CONF_FILE;
     if file_is_readable(test) {
@@ -479,7 +486,30 @@ fn get_prefs_path() -> Option<String> {
     }
     if let Some(mut conf) = dirs::config_dir() {
         conf.push("OutFly");
+        if !conf.exists() {
+            match fs::create_dir_all(&conf) {
+                Ok(_) => {}
+                Err(error) => {
+                    eprintln!("Failed creating configuration directory: {error}");
+                }
+            }
+        }
+        if let Some(test) = conf.to_str() {
+            if !path_is_directory(test) {
+                eprintln!("Failed creating configuration directory");
+                return None;
+            }
+        }
+
         conf.push(CONF_FILE);
+        if !conf.exists() {
+            match fs::write(&conf, DEFAULT_CONFIG_TOML.to_string()) {
+                Ok(_) => {}
+                Err(error) => {
+                    eprintln!("Failed creating configuration file: {error}");
+                }
+            }
+        }
         if let Some(test) = conf.to_str() {
             if file_is_readable(test) {
                 return Some(test.to_string());
@@ -503,7 +533,7 @@ pub fn load_prefs() -> Preferences {
         }
         None => {
             println!("Found no preference file, using default preferences.");
-            (include_str!("data/outfly.toml").to_string(), None)
+            (DEFAULT_CONFIG_TOML.to_string(), None)
         }
     };
     match toml.parse::<DocumentMut>() {