Begin detecting mentions, and slicing to the actual message portion

Also convert source_nick to a plain string, instead of an Option. Next should be making weather code get weather for specified locations.

src/main.rs

@@ -1,11 +1,13 @@
 extern crate irc;
 extern crate hyper;
 extern crate rustc_serialize;
+extern crate regex;
 
 use std::io::Read;
 use irc::client::prelude::*;
 use hyper::{Client};
 use rustc_serialize::json::{self};
+use regex::Regex;
 
 static WEATHER_API_BASE: &'static str = "http://api.wunderground.com/api/";
 
@@ -26,15 +28,27 @@ fn main() {
 
 fn handle_privmsg(target: &String, message_body: &String, message_obj: &Message, server: &IrcServer) {
     println!("Received message in {} from {}: {}", target, message_obj.source_nickname().unwrap(), message_body);
-    let source_nick = message_obj.source_nickname();
-    if message_body.contains("rust-bot") {
-        server.send_privmsg(target, "Hello!").unwrap();
-    } else if message_body.contains("test_get_weather") {
+    let source_nick = message_obj.source_nickname().unwrap();
+    let my_nick = server.current_nickname();
+    let mentions_regex = Regex::new(&format!("({}(:|,) )(.+)$", my_nick)).unwrap();
+    let mut inner_message = String::new();
+    match mentions_regex.captures(message_body) {
+        Some(capture) => match capture.at(3) {
+            Some(inner_message_match) => {inner_message = String::from(inner_message_match); println!("mentioned_message: {}", inner_message)},
+            _ => (),
+        },
+        _ => (),
+    }
+    println!("mentioned_message: {}", inner_message);
+
+    if inner_message == String::from("test") {
+        server.send_privmsg(target, &format!("{}: Hello!", source_nick)).unwrap();
+    } else if inner_message.starts_with("weather") {
         match server.config().options {
             None => println!("Options not configured!"),
             Some(ref options) => match options.get("wunderground_api_key") {
                 None => println!("wunderground_api_key not configured!"),
-                Some(api_key) => server.send_privmsg(target, &format!("{}: {}", source_nick.unwrap(), &test_get_weather(api_key))).unwrap(),
+                Some(api_key) => server.send_privmsg(target, &format!("{}: {}", source_nick, &test_get_weather(api_key))).unwrap(),
             }
         }
     } else if message_body.contains("bot-quit") {