Add reset button

rs/src/ui.rs

@@ -230,6 +230,14 @@ impl Ui {
             Err("choose_move takes 1 arg".to_owned())
         }
     }
+    fn reset(&mut self, args: &[&str]) -> Result<String, String> {
+        if let [] = args {
+            self.engine.reset();
+            Ok(format!("{}", self.engine.get_state()))
+        } else {
+            Err("reset doesn't take args".to_owned())
+        }
+    }
     fn handle_command(&mut self, s: &str) -> Result<String, String> {
         let mut cmd = s.split(',');
         // There will be at least an empty string => otherwise panic
@@ -241,6 +249,7 @@ impl Ui {
             "make_move" => self.make_move(&args),
             "set_state" => self.set_state(&args),
             "choose_move" => self.choose_move(&args),
+            "reset" => self.reset(&args),
             "" => Err("No command given".to_owned()),
             _ => Err("Invalid command".to_owned()),
         }