Only show piece tutorials once

src/tutorial.rs

@@ -262,22 +262,25 @@ fn step(
             let ownership_check = !ownership_done && transitions.iter().count() > 0;
             let jump_done = seen.0.contains(&TutorialState::PieceJump);
             let queen_selected = pieces.iter().filter(|&p| *p == game::Piece::Queen).count() > 0;
+            let queen_seen = seen.0.contains(&TutorialState::PieceQueen);
             let drone_selected = pieces.iter().filter(|&p| *p == game::Piece::Drone).count() > 0;
+            let drone_seen = seen.0.contains(&TutorialState::PieceDrone);
             let pawn_selected = pieces.iter().filter(|&p| *p == game::Piece::Pawn).count() > 0;
+            let pawn_seen = seen.0.contains(&TutorialState::PiecePawn);
 
             // A piece is selected, so talk about it
             if piece_selected {
                 // When a queen is selected for the first time...
-                if queen_selected {
+                if queen_selected && !queen_seen {
                     TutorialState::PieceQueen
                 // When a drone is selected for the first time...
-                } else if drone_selected {
+                } else if drone_selected && !drone_seen {
                     TutorialState::PieceDrone
                 // When a pawn is selected for the first time...
-                } else if pawn_selected {
+                } else if pawn_selected && !pawn_seen {
                     TutorialState::PiecePawn
                 } else {
-                    panic!("This shouldn't be possible...!")
+                    TutorialState::Empty
                 }
             // There are no pieces selected
             } else {