check that name is valid per name requirements

src/game/state/login.rs

@@ -3,7 +3,7 @@ use log::warn;
 use mio::Token;
 
 use crate::command::Command;
-use crate::game::Game;
+use crate::game::{Game, PlayerCheck};
 use crate::player::Player;
 use crate::queue::SendQueue;
 use crate::state::*;
@@ -26,24 +26,35 @@ impl Game {
 				if message.is_empty() {
 					send_queue.push(token, "\n\nUsername: ", false, None);
 				} else {
-					match self.db.find_player_by_name(&message) {
-						Ok(Some(_)) => {
-							send_queue.push(token, "\nPassword: ", false, None);
-							client.state = State::Login(Login::Password(message));
-						}
-						Ok(None) => {
-							send_queue.push(
-								token,
-								format!("\nCreate {}? [y/N]: ", message.clone()),
-								false,
-								None,
-							);
-							client.state = State::Login(Login::CreateUser(message));
-						}
-						Err(_) => {
-							send_queue.push(token, "\nError\n\nUsername: ", false, None);
-						}
-					}
+					match self.check_player_name(message) {
+						PlayerCheck::Ok(name) => {
+							match self.db.find_player_by_name(&name) {
+								Ok(Some(_)) => {
+									send_queue.push(token, "\nPassword: ", false, None);
+									client.state = State::Login(Login::Password(name));
+								}
+								Ok(None) => {
+									send_queue.push(
+										token,
+										format!("\nCreate {}? [y/N]: ", name),
+										false,
+										None,
+									);
+									client.state = State::Login(Login::CreateUser(name));
+								}
+								Err(_) => {
+									send_queue.push(token, "\nError\n\nUsername: ", false, None);
+								}
+							}
+						},
+						PlayerCheck::Err(err) => {
+							send_queue.push(token, "\nInvalid username:\n", false, None);
+							for line in err {
+								send_queue.push(token, format!("{}\n", line), false, None);
+							}
+							send_queue.push(token, "\n\nUsername: ", false, None);
+						},
+					};
 				}
 			}