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| "use strict";
Object.defineProperties(exports, {
Castling: {get: function() {
return Castling;
}},
__esModule: {value: true}
});
var Point = require('../../point').Point;
var $__1 = require('../../brands'),
KING = $__1.KING,
ROOK = $__1.ROOK,
QUEENSIDE = $__1.QUEENSIDE,
KINGSIDE = $__1.KINGSIDE,
WHITE = $__1.WHITE,
BLACK = $__1.BLACK;
var CheckError = require('../../error').CheckError;
var Castling = function Castling($__7) {
var $__9,
$__10;
var $__8 = $traceurRuntime.assertObject($__7),
fenEncoding = ($__9 = $__8.fenEncoding) === void 0 ? '' : $__9,
modes = ($__10 = $__8.modes) === void 0 ? parseCastlingModes(fenEncoding) : $__10,
rook = $__8.rook,
square = $__8.square;
this.modes = modes;
this.rook = rook;
this.square = square;
};
var $Castling = Castling;
($traceurRuntime.createClass)(Castling, {
isLegal: function(color, side) {
return this.modes[$traceurRuntime.toProperty(color)][$traceurRuntime.toProperty(side)];
},
toString: function() {
var modes = this.modes;
return [modes[$traceurRuntime.toProperty(WHITE)][$traceurRuntime.toProperty(KINGSIDE)] ? 'K' : '', modes[$traceurRuntime.toProperty(WHITE)][$traceurRuntime.toProperty(QUEENSIDE)] ? 'Q' : '', modes[$traceurRuntime.toProperty(BLACK)][$traceurRuntime.toProperty(KINGSIDE)] ? 'k' : '', modes[$traceurRuntime.toProperty(BLACK)][$traceurRuntime.toProperty(QUEENSIDE)] ? 'q' : ''].join('') || '-';
}
}, {
analyze: function(position, king, coords) {
var $__7 = $traceurRuntime.assertObject(king),
brand = $__7.brand,
color = $__7.color;
var castling = $traceurRuntime.assertObject(position).castling;
var side = $Castling.side(position, king, coords);
if (side == null || !castling.isLegal(color, side)) {
return new $Castling({modes: castling.modes});
}
Iif (!isValid(position, color, side)) {
throw new CheckError();
}
return new $Castling({
rook: $Castling.rook(position, color, side),
square: position.pieceCoords(king).sum($Castling.rookOffset(color, side)),
modes: blankModes()
});
},
side: function(position, king, coords) {
if (king.brand !== KING) {
return null;
}
for (var $__5 = [KINGSIDE, QUEENSIDE][$traceurRuntime.toProperty(Symbol.iterator)](),
$__6; !($__6 = $__5.next()).done; ) {
var side = $__6.value;
{
if ($Castling.isCastlingMove(position, king, side, coords)) {
return side;
}
}
}
return null;
},
rook: function(position, color, side) {
var kingX = $traceurRuntime.assertObject(position.pieceCoords(position.query({
brand: KING,
color: color
}))).x;
for (var $__5 = position.queryAll({
brand: ROOK,
color: color
})[$traceurRuntime.toProperty(Symbol.iterator)](),
$__6; !($__6 = $__5.next()).done; ) {
var rook = $__6.value;
{
try {
throw undefined;
} catch (rookX) {
{
rookX = $traceurRuntime.assertObject(position.pieceCoords(rook)).x;
if ((rookX > kingX && side === KINGSIDE) || (rookX < kingX && side === QUEENSIDE)) {
return rook;
}
}
}
}
}
},
isCastlingMove: function(position, king, side, coords) {
return (position.pieceCoords(king).sum($Castling.kingOffset(king.color, side)).equal(coords));
},
kingOffset: function(color, side) {
return new Point(xOffset(color, side, 2), 0);
},
rookOffset: function(color, side) {
return new Point(xOffset(color, side, -1), 0).sum($Castling.kingOffset(color, side));
}
});
var blankMode = (function() {
var $__4;
return (($__4 = {}, Object.defineProperty($__4, KINGSIDE, {
value: false,
configurable: true,
enumerable: true,
writable: true
}), Object.defineProperty($__4, QUEENSIDE, {
value: false,
configurable: true,
enumerable: true,
writable: true
}), $__4));
});
var blankModes = (function() {
var $__4;
return (($__4 = {}, Object.defineProperty($__4, WHITE, {
value: blankMode(),
configurable: true,
enumerable: true,
writable: true
}), Object.defineProperty($__4, BLACK, {
value: blankMode(),
configurable: true,
enumerable: true,
writable: true
}), $__4));
});
var sides = {
'q': QUEENSIDE,
'k': KINGSIDE
};
function parseCastlingModes(castling) {
var modes = blankModes();
String(castling || '').split('').forEach((function(mode) {
var modeLower = mode.toLowerCase();
var color = modeLower === mode ? BLACK : WHITE;
$traceurRuntime.setProperty(modes[$traceurRuntime.toProperty(color)], sides[$traceurRuntime.toProperty(modeLower)], true);
}));
return modes;
}
function xOffset(color, side) {
var m = arguments[2] !== (void 0) ? arguments[2] : 1;
if (color === WHITE) {
if (side === KINGSIDE) {
return m;
} else Eif (side === QUEENSIDE) {
return -m;
}
} else Eif (color === BLACK) {
if (side === KINGSIDE) {
return -m;
} else Eif (side === QUEENSIDE) {
return m;
}
}
}
function isValid(position, color, side) {
var loc = position.pieceCoords(position.query({
brand: KING,
color: color
}));
for (var $__5 = loc.to(loc.sum(Castling.kingOffset(color, side)))[$traceurRuntime.toProperty(Symbol.iterator)](),
$__6; !($__6 = $__5.next()).done; ) {
var pt = $__6.value;
{
if (position.isCheck(color, pt)) {
return false;
}
}
}
return true;
}
|