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[vchess.git] / public / javascripts / variants / Checkered.js

diff --git a/public/javascripts/variants/Checkered.js b/public/javascripts/variants/Checkered.js
index 2d62d4b..9de46ff 100644 (file)
--- a/public/javascripts/variants/Checkered.js
+++ b/public/javascripts/variants/Checkered.js
@@ -4,6 +4,7 @@ class CheckeredRules extends ChessRules
        {
                return b[0]=='c' ? "Checkered/"+b : b;
        }
+
        static board2fen(b)
        {
                const checkered_codes = {
@@ -17,29 +18,49 @@ class CheckeredRules extends ChessRules
                        return checkered_codes[b[1]];
                return ChessRules.board2fen(b);
        }
+
        static fen2board(f)
        {
+               // Tolerate upper-case versions of checkered pieces (why not?)
                const checkered_pieces = {
                        's': 'p',
+                       'S': 'p',
                        't': 'q',
+                       'T': 'q',
                        'u': 'r',
+                       'U': 'r',
                        'c': 'b',
+                       'C': 'b',
                        'o': 'n',
+                       'O': 'n',
                };
                if (Object.keys(checkered_pieces).includes(f))
                        return 'c'+checkered_pieces[f];
                return ChessRules.fen2board(f);
        }
 
-       setFlags(fen)
+       static get PIECES()
+       {
+               return ChessRules.PIECES.concat(['s','t','u','c','o']);
+       }
+
+       static IsGoodFlags(flags)
+       {
+               // 4 for castle + 16 for pawns
+               return !!flags.match(/^[01]{20,20}$/);
+       }
+
+       setFlags(fenflags)
        {
-               super.setFlags(fen); //castleFlags
+               super.setFlags(fenflags); //castleFlags
                this.pawnFlags =
                {
-                       "w": new Array(8), //pawns can move 2 squares?
-                       "b": new Array(8)
+                       "w": _.map(_.range(8), i => true), //pawns can move 2 squares?
+                       "b": _.map(_.range(8), i => true)
                };
-               const flags = fen.split(" ")[1].substr(4); //skip first 4 digits, for castle
+               if (!fenflags)
+                       return;
+               const flags = fenflags.substr(4); //skip first 4 digits, for castle
                for (let c of ['w','b'])
                {
                        for (let i=0; i<8; i++)
@@ -47,13 +68,12 @@ class CheckeredRules extends ChessRules
                }
        }
 
-       // Aggregates flags into one object
-       get flags() {
+       aggregateFlags()
+       {
                return [this.castleFlags, this.pawnFlags];
        }
 
-       // Reverse operation
-       parseFlags(flags)
+       disaggregateFlags(flags)
        {
                this.castleFlags = flags[0];
                this.pawnFlags = flags[1];
@@ -108,9 +128,7 @@ class CheckeredRules extends ChessRules
 
        canIplay(side, [x,y])
        {
-               return ((side=='w' && this.moves.length%2==0)
-                               || (side=='b' && this.moves.length%2==1))
-                       && [side,'c'].includes(this.getColor(x,y));
+               return (side == this.turn && [side,'c'].includes(this.getColor(x,y)));
        }
 
        // Does m2 un-do m1 ? (to disallow undoing checkered moves)
@@ -133,7 +151,10 @@ class CheckeredRules extends ChessRules
                        const L = this.moves.length;
                        if (L > 0 && this.oppositeMoves(this.moves[L-1], m))
                                return false;
-                       return !this.underCheck(m);
+                       this.play(m);
+                       const res = !this.underCheck(color);
+                       this.undo(m);
+                       return res;
                });
        }
 
@@ -158,27 +179,21 @@ class CheckeredRules extends ChessRules
                return false;
        }
 
-       underCheck(move)
+       underCheck(color)
        {
-               const color = this.turn;
-               this.play(move);
-               let res = this.isAttacked(this.kingPos[color], [this.getOppCol(color),'c']);
-               this.undo(move);
-               return res;
+               return this.isAttacked(this.kingPos[color], [V.GetOppCol(color),'c']);
        }
 
-       getCheckSquares(move)
+       getCheckSquares(color)
        {
-               this.play(move);
-               const color = this.turn;
-               this.moves.push(move); //artifically change turn, for checkered pawns (TODO)
+               // Artifically change turn, for checkered pawns
+               this.turn = V.GetOppCol(color);
                const kingAttacked = this.isAttacked(
-                       this.kingPos[color], [this.getOppCol(color),'c']);
+                       this.kingPos[color], [V.GetOppCol(color),'c']);
                let res = kingAttacked
-                       ? [ JSON.parse(JSON.stringify(this.kingPos[color])) ] //need to duplicate!
-                       : [ ];
-               this.moves.pop();
-               this.undo(move);
+                       ? [JSON.parse(JSON.stringify(this.kingPos[color]))] //need to duplicate!
+                       : [];
+               this.turn = color;
                return res;
        }
 
@@ -194,11 +209,12 @@ class CheckeredRules extends ChessRules
        checkGameEnd()
        {
                const color = this.turn;
-               this.moves.length++; //artifically change turn, for checkered pawns (TODO)
-               const res = this.isAttacked(this.kingPos[color], [this.getOppCol(color),'c'])
+               // Artifically change turn, for checkered pawns
+               this.turn = V.GetOppCol(this.turn);
+               const res = this.isAttacked(this.kingPos[color], [V.GetOppCol(color),'c'])
                        ? (color == "w" ? "0-1" : "1-0")
                        : "1/2";
-               this.moves.length--;
+               this.turn = V.GetOppCol(this.turn);
                return res;
        }
 
@@ -223,7 +239,9 @@ class CheckeredRules extends ChessRules
 
        static GenRandInitFen()
        {
-               return ChessRules.GenRandInitFen() + "1111111111111111"; //add 16 pawns flags
+               const randFen = ChessRules.GenRandInitFen();
+               // Add 16 pawns flags:
+               return randFen.replace(" w 1111", " w 11111111111111111111");
        }
 
        getFlagsFen()
@@ -250,10 +268,9 @@ class CheckeredRules extends ChessRules
                }
 
                // Translate final square
-               let finalSquare =
-                       String.fromCharCode(97 + move.end.y) + (V.size.x-move.end.x);
+               const finalSquare = V.CoordsToSquare(move.end);
 
-               let piece = this.getPiece(move.start.x, move.start.y);
+               const piece = this.getPiece(move.start.x, move.start.y);
                if (piece == V.PAWN)
                {
                        // Pawn move
@@ -261,7 +278,7 @@ class CheckeredRules extends ChessRules
                        if (move.vanish.length > 1)
                        {
                                // Capture
-                               let startColumn = String.fromCharCode(97 + move.start.y);
+                               const startColumn = V.CoordToColumn(move.start.y);
                                notation = startColumn + "x" + finalSquare +
                                        "=" + move.appear[0].p.toUpperCase();
                        }