From b4270899d2f4e09fb52d1451662d77a41f84c2b3 Mon Sep 17 00:00:00 2001
From: "Elijah C. Voigt" <elijah.caine.mv@gmail.com>
Date: Tue, 7 Nov 2023 20:15:35 -0800
Subject: [PATCH] Moving works in 2d!

Now just need to generalize 3d selection to select pieces + board tiles for movement to work there!

Exicted!
---
 src/game.rs | 36 +++++++++++++++++++++++++++++++-----
 1 file changed, 31 insertions(+), 5 deletions(-)

diff --git a/src/game.rs b/src/game.rs
index 58d67c4..57eb053 100644
--- a/src/game.rs
+++ b/src/game.rs
@@ -18,6 +18,7 @@ impl Plugin for GamePlugin {
                     }),
                     select_sync.run_if(any_component_added::<Selected>),
                     deselect_sync.run_if(any_component_removed::<Selected>()),
+                    move_piece.run_if(any_component_added::<Selected>),
                 ),
             )
             .add_systems(
@@ -333,12 +334,37 @@ fn deselect_sync(
     })
 }
 
-fn cancel_place(
-    current: Query<Entity, (With<game::Selected>, With<game::Piece>)>,
-    mut commands: Commands,
-) {
+fn cancel_place(current: Query<Entity, (With<Selected>, With<Piece>)>, mut commands: Commands) {
     current.iter().for_each(|entity| {
         info!("De-selecting {:?}", entity);
-        commands.entity(entity).remove::<game::Selected>();
+        commands.entity(entity).remove::<Selected>();
+    });
+}
+
+/// When a tile is selected, move all selected pieces to that index
+fn move_piece(
+    events: Query<(Entity, &BoardIndex), (With<Tile>, Added<Selected>)>,
+    selected_pieces: Query<(Entity, &BoardIndex), (With<Selected>, With<Piece>)>,
+    mut board: ResMut<Board>,
+    mut commands: Commands,
+    mut move_events: EventWriter<Move>,
+) {
+    events.iter().for_each(|(tile, to)| {
+        selected_pieces.iter().for_each(|(piece, from)| {
+            // Move piece
+            match board.move_piece(from, to) {
+                Ok(moves) => {
+                    // De-select the piece
+                    commands.entity(piece).remove::<Selected>();
+                    moves.iter().for_each(|m| move_events.send(m.clone()));
+                }
+                Err(GameError::NullMove) => warn!("Null move!"),
+                Err(GameError::InvalidMove) => warn!("Invalid move!"),
+                Err(GameError::InvalidIndex) => warn!("Invalid index!"),
+            }
+        });
+
+        // De-select the tile
+        commands.entity(tile).remove::<Selected>();
     });
 }