From 315c8477b096de26d58c4a4140dadfec11e18adc Mon Sep 17 00:00:00 2001
From: leahb <leahb@172.30.31.30>
Date: Tue, 13 May 2025 16:27:06 +0200
Subject: [PATCH] attempt en passant

---
 src/backend/Board.java        | 36 +++++++++++++++++++++++++++++++++++
 src/backend/Piece.java        | 11 ++++++++++-
 src/backend/SpecialMoves.java | 33 +++++++++++++++++++++++++++++++-
 3 files changed, 78 insertions(+), 2 deletions(-)

diff --git a/src/backend/Board.java b/src/backend/Board.java
index e9ac46f..b3ff08a 100644
--- a/src/backend/Board.java
+++ b/src/backend/Board.java
@@ -102,6 +102,42 @@ public class Board {
 		}
 	}
 	
+	/*public void movePiece(int fromX, int fromY, int toX, int toY) {
+	    Piece piece = board.getPieceAt(fromX, fromY);
+	    if (piece == null) return;
+
+	    // --- En Passant ---
+	    SpecialMoves special = new SpecialMoves(piece, board);
+	    boolean isEnPassant = special.isEnpassant(fromX, fromY, toX, toY);
+
+	    // --- Move the piece
+	    board.setPieceAt(toX, toY, piece);
+	    board.setPieceAt(fromX, fromY, null);
+	    piece.setX(toX);
+	    piece.setY(toY);
+
+	    // --- Reset all pawns' en passant eligibility
+	    for (int i = 0; i < 8; i++) {
+	        for (int j = 0; j < 8; j++) {
+	            Piece p = board.getPieceAt(i, j);
+	            if (p != null && p.getType() == PieceType.Pawn) {
+	                p.setEnPassantEligible(false);
+	            }
+	        }
+	    }
+
+	    // --- If current pawn moved 2 steps forward, set it eligible for en passant
+	    if (piece.getType() == PieceType.Pawn && Math.abs(toY - fromY) == 2) {
+	        piece.setEnPassantEligible(true);
+	    }
+
+	    // --- En Passant message
+	    if (isEnPassant) {
+	        System.out.println("En Passant captured successfully!");
+	    }
+	}*/
+
+	
 	public void cleanBoard() {
 		pieces.clear();
 	}
diff --git a/src/backend/Piece.java b/src/backend/Piece.java
index da4dab6..3a8caf4 100644
--- a/src/backend/Piece.java
+++ b/src/backend/Piece.java
@@ -6,7 +6,16 @@ public class Piece {
 	private boolean isWhite;
 	private PieceType type;
 
-	
+	/*private boolean enPassantEligible = false;
+
+	public boolean isEnPassantEligible() {
+	    return enPassantEligible;
+	}
+
+	public void setEnPassantEligible(boolean eligible) {
+	    this.enPassantEligible = eligible;
+	}
+*/
 	public Piece(int x, int y, boolean isWhite, PieceType type) {
 		this.x=x;
 		this.y=y;
diff --git a/src/backend/SpecialMoves.java b/src/backend/SpecialMoves.java
index 3ce85ee..5bf6b40 100644
--- a/src/backend/SpecialMoves.java
+++ b/src/backend/SpecialMoves.java
@@ -57,4 +57,35 @@ public class SpecialMoves {
     	}
 	}
 
-}*/
+}
+package backend;
+
+public class SpecialMoves {
+
+    private Piece piece;
+    private Board board;
+
+    public SpecialMoves(Piece piece, Board board) {
+        this.piece = piece;
+        this.board = board;
+    }
+
+    // Call this when trying to move a pawn to check for en passant
+    public boolean isEnpassant(int fromX, int fromY, int toX, int toY) {
+        if (piece.getType() != PieceType.Pawn) return false;
+
+        boolean isWhite = piece.isWhite();
+
+        // En passant capture happens diagonally
+        int dx = toX - fromX;
+        int dy = toY - fromY;
+
+        if (Math.abs(dx) != 1 || (isWhite && dy != -1) || (!isWhite && dy != 1)) {
+            return false;
+        }
+
+        // Check the adjacent piece
+        Piece sidePawn = board.getPieceAt(toX, fromY);
+        if (sidePawn == null || sidePawn.getType() != PieceType.Pawn || sidePawn.isWhite() == isWhite) {
+
+*/
\ No newline at end of file