stuff

src/chess/board.rs

@@ -73,7 +73,7 @@ pub struct Board {
 // | 0;7 | 1;7 | 2;7 | 3;7 | 4;7 | 5;7 | 6;7 | 7;7 |
 // |-----------------------------------------------|
 // Chess board repesented in code
-//
+
 // NOTE: capture left/right is implemented relative to color
 // TODO: make this a doc comment
 
@@ -241,39 +241,135 @@ impl Board {
 
 /// Use position
 impl Board {
-    pub fn get_moves(&mut self) -> Vec<Move> {
+    pub fn position_init(&mut self) -> &mut Self {
+        let check = self.check_init();
+        self.mut_ref_position().ref_set_check(check);
+        let castl_possibilities = self.castling_possibilities_init();
+        trace!("{self:?}");
+        self.mut_ref_position().ref_set_castle_possibilities(castl_possibilities);
+        let moves = self.valid_moves_init();
+        // self.mut_ref_position().ref_set_moves(moves);
+        self
+    }
+
+    fn check_init(&mut self) -> Option<bool> {
+        let whites_turn = self.ref_whites_turn();
+        trace!("{whites_turn}");
+        let attacker = self.threatened_by(self.king_pos(*whites_turn));
+        match attacker.len() {
+            0 => None,
+            1 => Some(false),
+            _ => Some(true),
+        }
+    }
+
+    fn castling_possibilities_init(&mut self) -> [[bool; 2]; 2] {
+        let fields = if *self.mut_ref_whites_turn() {
+            if self.mut_ref_rows()[7][4] != Some(Piece::new(true, PieceVariant::King)) {
+                return [[false; 2]; 2]
+            }
+            [[5, 6], [2, 3]]
+        } else {
+            if self.mut_ref_rows()[0][4] != Some(Piece::new(false, PieceVariant::King)) {
+                return [[false; 2]; 2]
+            }
+            [[1, 2], [5, 6]]
+        };
+        let mut castle_possibilities = [[false; 2]; 2];
+        
+        let y = match self.mut_ref_whites_turn() {
+            true => 7,
+            false => 0,
+        };
+        for (i, side) in fields.iter().enumerate() {
+            for (j, field) in side.iter().enumerate() {
+                if self.used(Square::new(*field as u8, y)) || self.threatened(Square::new(*field as u8, y)) {
+                    castle_possibilities[i][j] = false;
+                    break;
+                }
+            }
+        }
+        castle_possibilities
+    }
+
+    fn valid_moves_init(&mut self) -> Vec<Move> {
+        let mut moves: Vec<Move> = vec![];
         if self.ref_position().ref_check().is_some() {
             if self.ref_position().ref_check().unwrap() {
                 let king_pos = self.king_pos(self.whites_turn);
-                self.mut_ref_position().ref_set_moves(MoveVariant::king_move(king_pos));
+                moves.append(&mut MoveVariant::king_move(king_pos));
+                for i in 0..moves.len() {
+                    if self.used(moves[i].to()) || self.threatened(moves[i].to()) {
+                        moves.remove(i);
+                    }
+                }
             } else {
                 todo!("take, block or king move");
             }
         }
-        todo!("finish");
+
+        if moves.is_empty() {
+            todo!("Any other move")
+        }
+        moves
+    }
 }
 
-    // INFO: solution 1 => reverse Change
-    // solution 2 => loops
-    pub fn rc_threatened(&self, square: Square) -> bool {
+
+impl Board {
+    pub fn used(&self, square: Square) -> bool {
+        self.ref_rows()[square.x() as usize][square.y() as usize].is_some()
+    }
+
+    pub fn threatened(&self, square: Square) -> bool {
         let mut changes;
-        let mut to_move;
+        let to_move = self.whites_turn;
         for variant in MoveVariant::iter() {
-            to_move = self.whites_turn;
             changes = MoveVariant::variant_move(variant.borrow());
-            for change in changes {
+            for mut change in changes {
+                change = change.reverse();
+                if square.x() as i8 + change.ref_x() < 0 || square.x() as i8 + change.ref_x() > 7 ||
+                    square.y() as i8 + change.ref_y() < 0 || square.y() as i8 + change.ref_y() > 7 {
+                    continue;
+                }
+                trace!("{:?}:{:?} => {}:{:?}", {square.x() as i8 + change.ref_x()}, {square.y() as i8 + change.ref_y()}, {if to_move {"w".to_string()} else {"b".to_string()}}, variant);
                 if self.ref_rows()
-                    [(square.clone().x() as i8 + change.ref_x()) as usize]
-                    [(square.clone().y() as i8 + change.ref_y()) as usize] == 
-                    Some(Piece::new(to_move, variant.as_piece_variant())) {
-                    return true;
+                    [(square.x() as i8 + change.ref_x()) as usize]
+                    [(square.y() as i8 + change.ref_y()) as usize] == 
+                    Some(Piece::new(to_move, variant.as_piece_variant()))
+                {
+                    return true
                 }
             }
         }
         false
     }
 
-    pub fn threatened_by(&self, _square: Square) -> Square {
-        todo!();
+    pub fn threatened_by(&self, square: Square) -> Vec<Square> {
+        let mut changes;
+        let to_move = self.whites_turn;
+        let mut attacker = vec![];
+        for variant in MoveVariant::iter() {
+            changes = MoveVariant::variant_move(variant.borrow());
+            for mut change in changes {
+                change = change.reverse();
+                if square.x() as i8 + change.ref_x() < 0 || square.x() as i8 + change.ref_x() > 7 ||
+                    square.y() as i8 + change.ref_y() < 0 || square.y() as i8 + change.ref_y() > 7 {
+                    continue;
+                }
+                trace!("{:?}:{:?} => {}:{:?}", {square.x() as i8 + change.ref_x()}, {square.y() as i8 + change.ref_y()}, {if to_move {"w".to_string()} else {"b".to_string()}}, variant);
+                if self.ref_rows()
+                    [(square.x() as i8 + change.ref_x()) as usize]
+                    [(square.y() as i8 + change.ref_y()) as usize] == 
+                    Some(Piece::new(to_move, variant.as_piece_variant())) {
+                    trace!("matched: {:?}:{:?}", {square.x() as i8 + change.ref_x()}, {square.y() as i8 + change.ref_y()});
+                    attacker.push(Square::new(
+                        (square.x() as i8 + change.ref_x()) as u8,
+                        (square.y() as i8 + change.ref_y()) as u8,
+                    ));
+                }
+            }
+        }
+        attacker
     }
 }

src/chess/moves.rs

@@ -3,7 +3,7 @@ use super::{piece::PieceVariant, square::Square};
 #[cfg(feature = "custom_pieces")]
 use serde_derive::Deserialize;
 
-#[derive(Debug)]
+#[derive(Debug, Clone, Copy)]
 pub struct Move {
     from: Square,
     to: Square,
@@ -70,17 +70,23 @@ impl Change {
 }
 
 impl Change {
-    pub fn reverse(&mut self) -> &Self {
+    pub fn ref_reverse(&mut self) -> &Self {
         let x = *self.ref_x();
         self.set_x(-x);
         let y = self.ref_y();
         self.set_y(-y)
     }
+
+    pub fn reverse(mut self) -> Self {
+        self.set_x(-self.x);
+        self.set_y(-self.y);
+        self
+    }
 }
 
 
 
-#[derive(strum_macros::EnumIter)]
+#[derive(strum_macros::EnumIter, Debug)]
 pub enum MoveVariant {
     King,
     KingCastle,
@@ -122,7 +128,7 @@ impl MoveVariant {
     pub fn variant_move(&self) -> Vec<Change> {
         match self {
             Self::King => Self::vec_king(),
-            Self::KingCastle => todo!(),
+            Self::KingCastle => vec![],
             Self::Queen => Self::vec_queen(),
             Self::Rook => Self::vec_rook(),
             Self::Bishop => Self::vec_bishop(),

src/chess/piece.rs

@@ -2,7 +2,7 @@
 #[cfg(feature = "custom_pieces")]
 use serde_derive::Deserialize;
 
-#[derive(PartialEq, Debug)]
+#[derive(PartialEq, Debug, Clone, Copy)]
 pub enum PieceVariant {
     King,
     Queen,

src/chess/square.rs

@@ -2,7 +2,7 @@ use log::{debug, trace};
 
 use super::moves::Change;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Square {
     x: u8,
     y: u8,
@@ -25,6 +25,16 @@ impl Square {
             ))
         }
     }
+
+    pub fn add_change(&self, change: &Change) -> Option<Self> {
+        let x = self.x as i8 + change.ref_x();
+        let y = self.y as i8 + change.ref_y();
+        if !(0..7).contains(&x) || !(0..7).contains(&y) {
+            None
+        } else {
+            Some(Square::new(x as u8, y as u8))
+        }
+    }
 }
 
 impl Square {
@@ -41,15 +51,3 @@ impl Square {
         &self.y
     }
 }
-
-impl Square {
-    pub fn add_change(&self, change: &Change) -> Option<Self> {
-        let x = self.x as i8 + change.ref_x();
-        let y = self.y as i8 + change.ref_y();
-        if !(0..7).contains(&x) || !(0..7).contains(&y) {
-            None
-        } else {
-            Some(Square::new(x as u8, y as u8))
-        }
-    }
-}

src/main.rs

@@ -18,6 +18,13 @@ fn main() {
     let config = get_config().unwrap_or_else(||panic!(""));
     trace!("{:?}", config);
 
-    let board = Board::from_fen("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1".to_string());
-    trace!("{:?}", board);
+    let mut board = Board::from_fen(
+        // "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1".to_string() // start
+        "2r2q1k/5pp1/4p1N1/8/1bp5/5P1R/6P1/2R4K b - - 0 1".to_string() // double-check
+    );
+
+    let moves = board
+        .position_init()
+        .ref_position()
+        .ref_moves();
 }