♻️ refactor: extract gen_key pure function

crates/ptth_server/src/bin/ptth_server.rs

@@ -48,12 +48,18 @@ pub struct ConfigFile {
 	pub file_server_root: Option <PathBuf>,
 }
 
-fn gen_key (path: &Path) -> anyhow::Result <()> {
+/// Generates 64 bytes of entropy and returns it as Base64
+
+fn gen_key () -> String {
 	use rand::RngCore;
 	let mut buffer = vec! [0_u8; 64];
 	rand::thread_rng ().fill_bytes (&mut buffer);
 	
-	let api_key = base64::encode (&buffer);
+	base64::encode (&buffer)
+}
+
+fn gen_and_save_key (path: &Path) -> anyhow::Result <()> {
+	let api_key = gen_key ();
 	
 	{
 		let mut f = File::create (path)?;
@@ -89,7 +95,7 @@ async fn main () -> Result <(), anyhow::Error> {
 	
 	let config_file: ConfigFile = match load_toml::load (&path) {
 		Err (ptth_server::errors::LoadTomlError::Io (_)) => if opt.auto_gen_key {
-			gen_key (&path)?;
+			gen_and_save_key (&path)?;
 			
 			load_toml::load (&path)?
 		}