From 2375f28ee390fb2a3a9b3543dc885d125347c656 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Varga=20D=C3=A1vid=20Lajos?=
 <vargadavidlajos@mailbox.unideb.hu>
Date: Thu, 27 Nov 2025 23:05:01 +0200
Subject: [PATCH] added getter method bitboard::board::fen

---
 engine/src/bitboard/board.rs | 29 +++++++++++++++++++++++++++++
 server/Cargo.lock            |  1 -
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/engine/src/bitboard/board.rs b/engine/src/bitboard/board.rs
index 78c96e2..75ac76b 100644
--- a/engine/src/bitboard/board.rs
+++ b/engine/src/bitboard/board.rs
@@ -1,3 +1,5 @@
+use crate::bitboard::utils::notation_from_square_number;
+
 use super::utils::try_get_square_number_from_notation;
 
 pub struct Board {
@@ -169,6 +171,7 @@ impl Board {
         if let Some(piece) = self.get_piece_character(sq) {
           if empty > 0 {
             fen.push_str(&empty.to_string());
+            empty = 0;
           }
           fen.push(piece);
         } else {
@@ -178,8 +181,34 @@ impl Board {
           }
         }
       }
+      if row > 0 {
+        fen.push('/');
+      }
     }
 
+    fen.push(' ');
+    if self.side_to_move() == 0 { fen.push('w'); } else { fen.push('b'); }
+
+    fen.push(' ');
+    if self.castling_rights() == 0 {
+      fen.push('-');
+    } else {
+      if self.castling_rights() & (1 << 3) != 0 { fen.push('K'); }
+      if self.castling_rights() & (1 << 2) != 0 { fen.push('Q'); }
+      if self.castling_rights() & (1 << 1) != 0 { fen.push('k'); }
+      if self.castling_rights() & (1 << 0) != 0 { fen.push('q'); }
+    }
+
+    fen.push(' ');
+    if self.en_passant_square() == 0 {
+      fen.push('-');
+    } else {
+      let sq = self.en_passant_square().trailing_zeros();
+      fen.push_str(&notation_from_square_number(sq as u8));
+    }
+
+    fen.push_str(" 0 1");
+
     return fen;
   }
 
diff --git a/server/Cargo.lock b/server/Cargo.lock
index 027f4a3..1037c3d 100644
--- a/server/Cargo.lock
+++ b/server/Cargo.lock
@@ -768,7 +768,6 @@ dependencies = [
  "env_logger",
  "futures-util",
  "log",
- "futures-util",
  "rand 0.9.2",
  "serde",
  "serde_json",