Extract LoginStatus to its own file.

src/client.rs

@@ -6,6 +6,7 @@ use slab;
 
 use crate::config;
 use crate::control;
+use crate::login::LoginStatus;
 use crate::proto;
 use crate::proto::peer;
 use crate::proto::server;
@@ -18,13 +19,6 @@ enum IncomingMessage {
     ControlNotification(control::Notification),
 }
 
-#[derive(Clone, Debug)]
-enum LoginStatus {
-    Pending,
-    Success(String),
-    Failure(String),
-}
-
 #[derive(Debug)]
 enum PeerState {
     /// We are trying to establish a direct connection.

src/login.rs

@@ -0,0 +1,22 @@
+/// Represents the status of the login operation.
+///
+/// In order to interact with the server, a client cannot simply open a network
+/// connection. Instead, it must send a login request with basic credentials.
+/// The server is supposed the respond with a success or error message. Once
+/// successfully logged in, the client can interact with the server.
+#[derive(Clone, Debug)]
+pub enum LoginStatus {
+    // TODO: add a state representing the fact that no request has been sent.
+
+    /// Sent request, awaiting response.
+    Pending,
+
+    /// Logged in.
+    /// Stores the MOTD as received from the server.
+    Success(String),
+
+    /// Failed to log in.
+    /// Stores the error message as received from the server.
+    Failure(String),
+}
+

src/main.rs

@@ -14,6 +14,7 @@ mod control;
 mod dispatcher;
 mod executor;
 mod handlers;
+mod login;
 mod message_handler;
 mod proto;
 mod room;