xiangqiground/dist/fen.js

xiangqi ui

import { pos2key, invRanks } from './util.js';
import * as cg from './types.js';
export const initial = 'rnbakabnr/9/1c5c1/p1p1p1p1p/9/9/P1P1P1P1P/1C5C1/9/RNBAKABNR';
const roles = {
    p: 'pawn',
    r: 'chariot',
    n: 'horse',
    h: 'horse',
    b: 'elephant',
    e: 'elephant',
    a: 'advisor',
    k: 'king',
    c: 'cannon',
};
const letters = {
    pawn: 'p',
    chariot: 'r',
    horse: 'n',
    elephant: 'b',
    advisor: 'a',
    king: 'k',
    cannon: 'c',
};
export function read(fen) {
    if (fen === 'start')
        fen = initial;
    const pieces = new Map();
    let row = 9, col = 0;
    for (const c of fen) {
        switch (c) {
            case ' ':
                return pieces;
            case '/':
                --row;
                if (row < 0)
                    return pieces;
                col = 0;
                break;
            default: {
                const nb = c.charCodeAt(0);
                if (nb < 58)
                    col += nb - 48;
                else {
                    const role = c.toLowerCase();
                    console.log(col, row);
                    pieces.set(pos2key([col, row]), {
                        role: roles[role],
                        color: c === role ? 'black' : 'white',
                    });
                    ++col;
                }
            }
        }
    }
    return pieces;
}
export function write(pieces) {
    return invRanks
        .map(y => cg.files
        .map(x => {
        const piece = pieces.get((x + y));
        if (piece) {
            let p = letters[piece.role];
            if (piece.color === 'white')
                p = p.toUpperCase();
            return p;
        }
        else
            return '1';
    })
        .join(''))
        .join('/')
        .replace(/1{2,}/g, s => s.length.toString());
}
//# sourceMappingURL=fen.js.map