Use configuration file (config.json)

src/config.rs

@@ -0,0 +1,36 @@
+
+use std::fs;
+use std::io;
+use serde::Deserialize;
+
+//// Config Example
+// {
+//   "nick": "RustBot",
+//   "ident": "icedragon",
+//   "gecos": "IceDragon's Rust client thingy",
+//   "server": "irc.quickfox.net:6667"
+// }
+
+#[derive(Debug, Deserialize)]
+pub struct IrcConfig {
+    pub nick: String,    // "RustBot"
+    pub ident: String,   // "icedragon"
+    pub gecos: String,   // "IceDragon's Rust Bot Thing"
+    pub server: String,  // "irc.quickfox.net:6667"
+}
+
+/// Load IRC configuration from a given file:
+/// 
+/// # Examples
+/// 
+/// ```rust,nodoc
+/// let conf = config::load_config("config.json").expect("failed to load config");
+/// 
+/// ```
+pub fn load_config(path: &str) -> io::Result<IrcConfig> {
+    let json_string = fs::read_to_string(path)?;
+    match serde_json::from_str(&json_string) {
+        Ok(conf) => Ok(conf),
+        Err(e) =>  Err(io::Error::new(io::ErrorKind::InvalidInput, e.to_string())),
+    }
+}

src/main.rs

@@ -2,6 +2,8 @@ use std::net::TcpStream;
 use std::io::{self, Read, Write};
 use std::ops::ControlFlow;
 
+mod config;
+
 #[derive(Debug)]
 #[allow(dead_code)]
 enum IrcClientMessage<'msg> {
@@ -280,7 +282,15 @@ impl Client {
 }
 
 fn main() -> io::Result<()> {
-    let mut client = Client::new("RustBot", "icedragon", "IceDragon's Rust client thingy");
-    client.connect("irc.quickfox.net:6667")?;
+    const CONFIG_FILE: &str = "config.json";
+
+    // load configuration
+    println!("[++] Loading configuration from {CONFIG_FILE}...");
+    let config = config::load_config(CONFIG_FILE)?;
+
+    // create & connect client
+    println!("[++] Creating & connecting bot client (nick: {})", config.nick);
+    let mut client = Client::new(&config.nick, &config.ident, &config.gecos);
+    client.connect(&config.server)?;
     client.serve()
 }