Add Tutorial button to toggle it on/off

src/tutorial.rs

@@ -16,15 +16,19 @@ impl Plugin for TutorialPlugin {
             )
             .add_systems(
                 Update,
-                menu::handle_menu_button::<TutorialState>.run_if(in_state(GameState::Play)),
+                // Toggle the tutorial state iff we are in the play state and the tutorial button was pressed
+                toggle_tutorial_button.run_if(in_state(GameState::Play).and_then(
+                    |buttons: Query<&Interaction, (With<Button>, With<Tutorial>, Changed<Interaction>)>| -> bool {
+                        buttons.iter().any(|i| *i == Interaction::Pressed)
+                    },
+                )),
             )
             .add_systems(
                 Update,
                 (
                     // Evaluate if a piece is selected
-                    step.run_if(state_exists::<TutorialState>())
-                        .run_if(not(in_state(TutorialState::None)))
-                        .run_if(
+                    step.run_if(
+                        state_exists::<TutorialState>().and_then(
                             // A piece changes sides
                             any_component_changed::<game::Side>
                                 // When a piece is selected, we
@@ -36,13 +40,16 @@ impl Plugin for TutorialPlugin {
                                     keys.just_pressed(KeyCode::Return)
                                 }),
                         ),
+                    ),
                 ),
             )
             .add_systems(OnExit(GameState::Play), deactivate::<TutorialState>)
             .add_systems(OnEnter(GameState::Play), activate::<Tutorial>)
             .add_systems(
                 Update,
-                activate_tutorial_step.run_if(state_changed::<TutorialState>()),
+                activate_tutorial_step.run_if(
+                    state_exists::<TutorialState>().and_then(state_changed::<TutorialState>()),
+                ),
             );
     }
 }
@@ -54,9 +61,9 @@ pub(crate) struct Tutorial;
 pub(crate) enum TutorialState {
     #[default]
     None,
-    Empty,
     Intro,
     Objective,
+    Empty,
     PieceIntro,
     PieceQueen,
     PieceDrone,
@@ -270,13 +277,13 @@ fn step(
 
     info!("Curr: {:?}, Seen: {:?}", curr_state.get(), seen);
 
-    next_state.set(match curr_state.get() {
-        // This transition is implicit. Menu transitions from None to Intro
-        TutorialState::None => TutorialState::Intro,
+    match curr_state.get() {
+        // None does not go to Intro, that is controlled by the button handler
+        TutorialState::None => next_state.set(TutorialState::None),
         // From Intro we always go to Objective
-        TutorialState::Intro => TutorialState::Objective,
+        TutorialState::Intro => next_state.set(TutorialState::Objective),
         // From objective we go to the Pieces flow intro
-        TutorialState::Objective => TutorialState::PieceIntro,
+        TutorialState::Objective => next_state.set(TutorialState::PieceIntro),
         // From PiecesIntro we can go to any other Pieces if a piece is selected
         // Each pieces tutorial can transition to any other, as well as Ownership
         TutorialState::PieceIntro
@@ -304,7 +311,7 @@ fn step(
             let pawn_seen = seen.0.contains(&TutorialState::PiecePawn);
 
             // A piece is selected, so talk about it
-            if piece_selected {
+            let next = if piece_selected {
                 // When a queen is selected for the first time...
                 if queen_selected && !queen_seen {
                     TutorialState::PieceQueen
@@ -335,14 +342,16 @@ fn step(
                     TutorialState::PieceEnd
                 // Default, empty (tutorial doesn't always need to show something)
                 } else {
-                    TutorialState::Empty
+                    TutorialState::PieceIntro
                 }
-            }
+            };
+
+            next_state.set(next);
         }
         // After the outro, we exit the tutorial
-        TutorialState::Outro => TutorialState::None,
+        TutorialState::Outro => next_state.set(TutorialState::None),
         TutorialState::_Promotions => todo!("Not implemented yet!"),
-    });
+    }
 }
 
 fn activate_tutorial_step(
@@ -363,29 +372,15 @@ fn activate_tutorial_step(
     });
 }
 
-// Start by loading the same game as display3d does
-
-// Show the intro text when entering Intro TutorialState
-// Continue
-
-// Show objective when entering Objective TutorialState
-// Continue
-
-// Prompt user to click some pieces
-// When each piece type is clicked, show relevant text
-// Once all pieces are described say jumping text
-// Finally end with final text
-// Continue
-
-// When a piece crosses the canal, show ownership text
-// Continue
-
-// A few moves in, show field promotions text
-// Continue
-
-// End with outro text
-// Continue
-
-// Play game out as usual
-
-// If player early exits, set TutorialState to None
+// Toggles the menu on/off by inserting/removing the Tutorial state
+fn toggle_tutorial_button(
+    state: Res<State<TutorialState>>,
+    mut next_state: ResMut<NextState<TutorialState>>,
+) {
+    match state.get() {
+        // If inactive, start the intro
+        TutorialState::None => next_state.set(TutorialState::Intro),
+        // Else, revert to None state
+        _ => next_state.set(TutorialState::None),
+    }
+}