X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=client%2Fsrc%2Fbase_rules.js;h=e9ea7bc10e189f285100e5337b786f6b07805611;hb=9d15c433c207a2c3bb548d095939c3e08b4038fd;hp=d17ebe67a075bf77484e6923ce0726266268c3be;hpb=7e8a7ea1cb66adb4a987badfb0a3c2f99a21bd0a;p=vchess.git

diff --git a/client/src/base_rules.js b/client/src/base_rules.js
index d17ebe67..e9ea7bc1 100644
--- a/client/src/base_rules.js
+++ b/client/src/base_rules.js
@@ -112,6 +112,11 @@ export const ChessRules = class ChessRules {
     return false;
   }
 
+  // Some games are drawn unusually (bottom right corner is black)
+  static get DarkBottomRight() {
+    return false;
+  }
+
   // Some variants require lines drawing
   static get Lines() {
     if (V.Monochrome) {
@@ -126,6 +131,11 @@ export const ChessRules = class ChessRules {
     return null;
   }
 
+  // In some variants, the player who repeat a position loses
+  static get LoseOnRepetition() {
+    return false;
+  }
+
   // Some variants use click infos:
   doClick() {
     return null;
@@ -148,7 +158,7 @@ export const ChessRules = class ChessRules {
 
   // Turn "p" into "bp" (for board)
   static fen2board(f) {
-    return f.charCodeAt() <= 90 ? "w" + f.toLowerCase() : "b" + f;
+    return f.charCodeAt(0) <= 90 ? "w" + f.toLowerCase() : "b" + f;
   }
 
   // Check if FEN describes a board situation correctly
@@ -187,7 +197,7 @@ export const ChessRules = class ChessRules {
         if (V.PIECES.includes(row[i].toLowerCase())) sumElts++;
         else {
           const num = parseInt(row[i], 10);
-          if (isNaN(num)) return false;
+          if (isNaN(num) || num <= 0) return false;
           sumElts += num;
         }
       }
@@ -265,7 +275,7 @@ export const ChessRules = class ChessRules {
 
   // En-passant square, if any
   getEpSquare(moveOrSquare) {
-    if (!moveOrSquare) return undefined;
+    if (!moveOrSquare) return undefined; //TODO: necessary line?!
     if (typeof moveOrSquare === "string") {
       const square = moveOrSquare;
       if (square == "-") return undefined;
@@ -518,6 +528,7 @@ export const ChessRules = class ChessRules {
   }
 
   // Scan board for kings positions
+  // TODO: should be done from board, no need for the complete FEN
   scanKings(fen) {
     // Squares of white and black king:
     this.kingPos = { w: [-1, -1], b: [-1, -1] };
@@ -643,20 +654,14 @@ export const ChessRules = class ChessRules {
   // MOVES GENERATION
 
   // All possible moves from selected square
-  getPotentialMovesFrom([x, y]) {
-    switch (this.getPiece(x, y)) {
-      case V.PAWN:
-        return this.getPotentialPawnMoves([x, y]);
-      case V.ROOK:
-        return this.getPotentialRookMoves([x, y]);
-      case V.KNIGHT:
-        return this.getPotentialKnightMoves([x, y]);
-      case V.BISHOP:
-        return this.getPotentialBishopMoves([x, y]);
-      case V.QUEEN:
-        return this.getPotentialQueenMoves([x, y]);
-      case V.KING:
-        return this.getPotentialKingMoves([x, y]);
+  getPotentialMovesFrom(sq) {
+    switch (this.getPiece(sq[0], sq[1])) {
+      case V.PAWN: return this.getPotentialPawnMoves(sq);
+      case V.ROOK: return this.getPotentialRookMoves(sq);
+      case V.KNIGHT: return this.getPotentialKnightMoves(sq);
+      case V.BISHOP: return this.getPotentialBishopMoves(sq);
+      case V.QUEEN: return this.getPotentialQueenMoves(sq);
+      case V.KING: return this.getPotentialKingMoves(sq);
     }
     return []; //never reached
   }
@@ -671,8 +676,8 @@ export const ChessRules = class ChessRules {
         new PiPo({
           x: ex,
           y: ey,
-          c: tr ? tr.c : initColor,
-          p: tr ? tr.p : initPiece
+          c: !!tr ? tr.c : initColor,
+          p: !!tr ? tr.p : initPiece
         })
       ],
       vanish: [
@@ -888,7 +893,6 @@ export const ChessRules = class ChessRules {
     // Castling ?
     const oppCol = V.GetOppCol(c);
     let moves = [];
-    let i = 0;
     // King, then rook:
     finalSquares = finalSquares || [ [2, 3], [V.size.y - 2, V.size.y - 3] ];
     const castlingKing = this.board[x][y].charAt(1);
@@ -915,7 +919,7 @@ export const ChessRules = class ChessRules {
       // Nothing on the path of the king ? (and no checks)
       const finDist = finalSquares[castleSide][0] - y;
       let step = finDist / Math.max(1, Math.abs(finDist));
-      i = y;
+      let i = y;
       do {
         if (
           (!castleInCheck && this.isAttacked([x, i], oppCol)) ||
@@ -969,7 +973,7 @@ export const ChessRules = class ChessRules {
           ],
           vanish: [
             // King might be initially disguised (Titan...)
-            new PiPo({ x: x, y: y, p: this.board[x][y][1], c: c }),
+            new PiPo({ x: x, y: y, p: castlingKing, c: c }),
             new PiPo({ x: x, y: rookPos, p: castlingPiece, c: c })
           ],
           end:
@@ -1067,8 +1071,10 @@ export const ChessRules = class ChessRules {
       }
       if (
         V.OnBoard(rx, ry) &&
+        this.board[rx][ry] != V.EMPTY &&
         this.getPiece(rx, ry) == piece &&
-        this.getColor(rx, ry) == color
+        this.getColor(rx, ry) == color &&
+        this.canTake([rx, ry], [x, y]) //for Paco-Sako (TODO: necessary?)
       ) {
         return true;
       }
@@ -1168,6 +1174,7 @@ export const ChessRules = class ChessRules {
   }
 
   updateCastleFlags(move, piece, color) {
+    // TODO: check flags. If already off, no need to always re-evaluate
     const c = color || V.GetOppCol(this.turn);
     const firstRank = (c == "w" ? V.size.x - 1 : 0);
     // Update castling flags if rooks are moved