refactor Conf to be object oriented

src/conf.rs

@@ -16,11 +16,14 @@ pub struct Conf {
     pub dac_id: Option<u8>,
     pub dac_url: Option<String>,
 }
-pub fn load_config(path: &str) -> Result<Conf, Box<dyn std::error::Error>> {
-    let settings = Config::builder()
-        .add_source(config::File::with_name(path))
-	.build()?;
 
-    let conf : Conf = settings.try_deserialize()?;
-    Ok(conf)
+impl Conf {
+    pub fn new(path: &str) -> Result<Conf, Box<dyn std::error::Error>> {
+	let settings = Config::builder()
+            .add_source(config::File::with_name(path))
+	    .build()?;
+        
+	let conf : Conf = settings.try_deserialize()?;
+	Ok(conf)
+    }
 }

src/main.rs

@@ -18,7 +18,7 @@ use helios_dac::{
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
 use redis_ctrl::{RedisCtrl,Order};
-use conf::{load_config,Conf};
+use conf::Conf;
 use errors::LJError;
 
 const CENTER : (u16,u16) = (2000, 2000);
@@ -36,7 +36,7 @@ fn run_all() -> Result<(), Box<dyn std::error::Error>> {
     let Some(filename) = std::env::args().nth(1) else {
 	return Err(Box::new(LJError::ConfigFileMissing));
     };    
-    let config = load_config(&filename)?;    
+    let config = Conf::new(&filename)?;
     let mut rs = RedisCtrl::new()?;
     
     let running = Arc::new(AtomicBool::new(true));

tests/test_conf.rs

@@ -1,20 +1,20 @@
-use lj_rust::conf::{load_config, DacFamily};
+use lj_rust::conf::{Conf, DacFamily};
 
 #[test]
 fn it_loads_a_valid_conf() {
-    let result = load_config("tests/settings/valid");
+    let result = Conf::new("tests/settings/valid");
     assert!(result.is_ok());
 }
 
 #[test]
 fn it_fails_invalid_conf() {
-    let result = load_config("tests/settings/empty");
+    let result = Conf::new("tests/settings/empty");
     assert!(result.is_err());
 }
 
 #[test]
 fn it_finds_struct_fields() {
-    let config = match load_config("tests/settings/valid") {
+    let config = match Conf::new("tests/settings/valid") {
         Ok(c) => c,
         Err(err) => {
             panic!("Unable to load config file: {:?}", err)