variants/Coregal/class.js

   1 import { ChessRules, Move, PiPo } from "@/base_rules";
   2 import { ArrayFun } from "@/utils/array";
   3 import { randInt, sample } from "@/utils/alea";
   4
   5 export class CoregalRules extends ChessRules {
   6
   7   genRandInitBaseFen() {
   8     const s = FenUtil.setupPieces(
   9       ['r', 'n', 'b', 'l', 'k', 'b', 'n', 'r'],
  10       {
  11         randomness: this.options["randomness"],
  12         between: [{p1: 'k', p2: 'r'}, {p1: 'l', p2: 'r'}],
  13         diffCol: ['b'],
  14         // 'k' and 'l' useful only to get relative position
  15         flags: ['r', 'k', 'l']
  16       }
  17     );
  18     return {
  19       fen: s.b.join("") + "/pppppppp/8/8/8/8/PPPPPPPP/" +
  20            s.w.join("").toUpperCase(),
  21       // TODO: re-arrange flags, use another init variable "relPos" (in o)
  22       // (maybe after FEN parsing, easier?)
  23       o: {flags: s.flags + s.flags} //second set for royal queen
  24     };
  25   }
  26
  27   pieces() {
  28     let res = super.pieces();
  29     res['l'] = JSON.parse(JSON.stringify(res['q']));
  30     // TODO: CSS royal queen symbol (with cross?)
  31     res['l']["class"] = "royal_queen";
  32     return res;
  33   }
  34
  35   // TODO: something like that indeed (+ flags to FEN)
  36   setFlags(fenflags) {
  37     this.castleFlags = {
  38       'k': { 'w': [...Array(4)], b: [...Array(4)] },
  39       'l': { 'w': [...Array(4)], b: [...Array(4)] }
  40     };
  41     for (let i = 0; i < 8; i++) {
  42       this.castleFlags[i < 4 ? "k" : "l"][i % 4 < 2 ? "w" : "b"] =
  43         parseInt(fenflags.charAt(i), 10);
  44     }
  45   }
  46
  47   isKing(x, y, p) {
  48     if (!p)
  49       p = this.getPiece(x, y);
  50     ['k', 'l'].includes(p); //no cannibal mode
  51   }
  52
  53   getCastleMoves([x, y]) {
  54     const c = this.getColor(x, y),
  55           p = this.getPiece(x, y);
  56     // Relative position of the selected piece: left or right ?
  57     // If left: small castle left, large castle right.
  58     // If right: usual situation.
  59     const finalSquares = [
  60       this.relPos[c][p] == "left" ? [1, 2] : [2, 3],
  61       this.relPos[c][p] == "right" ? [6, 5] : [5, 4]
  62     ];
  63     const moves =
  64       super.getCastleMoves([x, y], finalSquares, null, this.castleFlags[p]);
  65     return moves;
  66   }
  67
  68   // TODO: updateFlags (just pass castleFlags arg)
  69
  70 };