122 lines
2.9 KiB
JavaScript
122 lines
2.9 KiB
JavaScript
|
// ECMAScript 5 strict mode
|
||
|
|
/* jshint globalstrict: true*/
|
||
|
|
/* global WHITE,BLACK */
|
||
|
|
"use strict";
|
||
|
|
(function() {
|
||
|
|
/*
|
||
|
|
var WHITE = 1;
|
||
|
|
var BLACK = 0;
|
||
|
|
*/
|
||
|
|
function Move(piece,color,from,to,promotion,result,str) {
|
||
|
|
this.piece = piece ? piece : "P";
|
||
|
|
this.color = color;
|
||
|
|
this.from = from;
|
||
|
|
this.to = to;
|
||
|
|
this.promotion = promotion;
|
||
|
|
this.result = result;
|
||
|
|
this.str = str;
|
||
|
|
}
|
||
|
|
|
||
|
|
String.prototype.removeBrackets = function(open,close) {
|
||
|
|
var count = 0;
|
||
|
|
var newString = "";
|
||
|
|
for (var i = 0; i < this.length; i++) {
|
||
|
|
var c = this.charAt(i);
|
||
|
|
if (c === open) {
|
||
|
|
count++;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (c === close) {
|
||
|
|
count--;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (count === 0) {
|
||
|
|
newString += c;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return newString;
|
||
|
|
};
|
||
|
|
|
||
|
|
function parsePGN(pgn) {
|
||
|
|
var moves = {};
|
||
|
|
moves.fen = null;
|
||
|
|
moves.sequence = [];
|
||
|
|
moves.startColor = WHITE;
|
||
|
|
|
||
|
|
var color = WHITE;
|
||
|
|
|
||
|
|
//var re_fen = /[pnbrqkPNBRQK1-8]+(\/[pnbrqkPNBRQK1-8]+){7} +[wb] +([KQ]{1,2}|-) *([kq]{1,2}|-)( +(([a-h][1-8])|-))? +\d+ +\d+/
|
||
|
|
var re_fen = /\[FEN *" *([pnbrqkPNBRQK1-8]+(?:\/[pnbrqkPNBRQK1-8]+){7} +([wb]) +(?:[KQ]{1,2}|-) *(?:[kq]{1,2}|-)(?: +(?:(?:[a-h][1-8])|-))? +\d+ +\d+) *" *\]/;
|
||
|
|
var match = pgn.match(re_fen);
|
||
|
|
if (match) {
|
||
|
|
moves.fen = match[1];
|
||
|
|
color = match[2] === "w" ? WHITE : BLACK;
|
||
|
|
moves.startColor = color;
|
||
|
|
}
|
||
|
|
|
||
|
|
var cleanPGN = pgn
|
||
|
|
.removeBrackets("[","]") // removes metadata
|
||
|
|
.removeBrackets("{","}") // removes comments
|
||
|
|
.removeBrackets("(",")") // removes comments
|
||
|
|
.replace(/\$\d+/g,'') // removes this thing
|
||
|
|
.replace(/\d+\.{1,3}/g,'') // removes move numbers
|
||
|
|
.replace(/\s+/g,' ') // replaces multiple whitespaces by simple spaces
|
||
|
|
.trim() // removes front and back whitespaces
|
||
|
|
.replace(/(0-1)$/g,'') // result black won
|
||
|
|
.replace(/(1-0)$/g,'') // result white won
|
||
|
|
.replace(/(1\/2-1\/2)$/g,'') // result draw
|
||
|
|
.replace(/(\*)$/g,'') // result ongoing
|
||
|
|
.trim()
|
||
|
|
.split(' '); // split moves
|
||
|
|
|
||
|
|
// regex for basic moves
|
||
|
|
// |pieces | |src col/row| |dest col/row| promo |check|
|
||
|
|
var re_pieceMove =/^([NBRQK])?([a-h]?[1-8]?)?x?([a-h][1-8])(=[NBRQK])?([+#])?/;
|
||
|
|
// regex for castling
|
||
|
|
var re_castling = "(O-O(?:-O)?)([+#])?";
|
||
|
|
var castling = {
|
||
|
|
"O-O" : {
|
||
|
|
from:['e8','e1'],
|
||
|
|
to:['g8','g1']
|
||
|
|
},
|
||
|
|
"O-O-O": {
|
||
|
|
from:['e8','e1'],
|
||
|
|
to:['c8','c1']
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
cleanPGN.forEach(function(move) {
|
||
|
|
var info=[];
|
||
|
|
|
||
|
|
info = move.match(re_pieceMove);
|
||
|
|
if(info) {
|
||
|
|
moves.sequence.push(new Move(
|
||
|
|
info[1],
|
||
|
|
color,
|
||
|
|
info[2],
|
||
|
|
info[3],
|
||
|
|
info[4],
|
||
|
|
info[5],
|
||
|
|
move
|
||
|
|
));
|
||
|
|
}
|
||
|
|
|
||
|
|
info = move.match(re_castling);
|
||
|
|
if(info) {
|
||
|
|
moves.sequence.push(new Move(
|
||
|
|
"K",
|
||
|
|
color,
|
||
|
|
castling[info[1]].from[color],
|
||
|
|
castling[info[1]].to[color],
|
||
|
|
undefined,
|
||
|
|
info[2],
|
||
|
|
move
|
||
|
|
));
|
||
|
|
}
|
||
|
|
color = 1-color;
|
||
|
|
});
|
||
|
|
|
||
|
|
return moves;
|
||
|
|
}
|
||
|
|
window.parsePGN = parsePGN;
|
||
|
|
})();
|