[moves, position] Move MoveRecord to the moves crate

moves/src/lib.rs

@@ -6,8 +6,10 @@ pub mod testing;
 mod builder;
 mod defs;
 mod moves;
+mod record;
 
 pub use builder::{Builder, Error as BuildMoveError, Result as BuildMoveResult};
 pub use defs::{Kind, PromotionShape};
 pub use generators::GeneratedMove;
 pub use moves::Move;
+pub use record::MoveRecord;

moves/src/record.rs

@@ -0,0 +1,43 @@
+// Eryn Wells <eryn@erynwells.me>
+
+use crate::Move;
+use chessfriend_board::{board::HalfMoveClock, Board, CastleRights};
+use chessfriend_core::{Color, Piece, Square};
+
+/// A record of a move made on a board. This struct contains all the information
+/// necessary to restore the board position to its state immediately before the
+/// move was made.
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct MoveRecord {
+    /// The color of the player who made the move
+    pub color: Color,
+
+    /// The move played
+    pub ply: Move,
+
+    /// The en passant square when the move was made
+    pub en_passant_target: Option<Square>,
+
+    /// Castling rights for all players when the move was made
+    pub castling_rights: CastleRights,
+
+    /// The half move clock when the move was made
+    pub half_move_clock: HalfMoveClock,
+
+    /// The piece captured by the move, if any
+    pub captured_piece: Option<Piece>,
+}
+
+impl MoveRecord {
+    #[must_use]
+    pub fn new(board: &Board, ply: Move, capture: Option<Piece>) -> Self {
+        Self {
+            color: board.active_color,
+            ply,
+            en_passant_target: board.en_passant_target,
+            castling_rights: board.castling_rights,
+            half_move_clock: board.half_move_clock,
+            captured_piece: capture,
+        }
+    }
+}