client/src/variants/Rugby.js

   1 import { ChessRules } from "@/base_rules";
   2 import { ArrayFun } from "@/utils/array";
   3
   4 export class RugbyRules extends ChessRules {
   5
   6   static get Options() {
   7     return null;
   8   }
   9
  10   static get HasFlags() {
  11     return false;
  12   }
  13
  14   static get PawnSpecs() {
  15     return Object.assign(
  16       {},
  17       ChessRules.PawnSpecs,
  18       { promotions: [V.PAWN] }
  19     );
  20   }
  21
  22   scanKings() {}
  23
  24   getPotentialMovesFrom(sq) {
  25     // There are only pawns:
  26     return this.getPotentialPawnMoves(sq);
  27   }
  28
  29   getPotentialPawnMoves(sq) {
  30     const moves = super.getPotentialPawnMoves(sq);
  31     // Add king movements, without capturing
  32     const steps =
  33       this.turn == 'w'
  34         ? [ [-1,-1], [-1,1], [0,1], [0,-1], [1,-1], [1,0], [1,1] ]
  35         : [ [1,-1], [1,1], [0,1], [0,-1], [-1,-1], [-1,0], [-1,1] ];
  36     let addMoves = this.getSlideNJumpMoves(sq, steps, 1);
  37     return moves.concat(addMoves.filter(m => m.vanish.length == 1));
  38   }
  39
  40   static GenRandInitFen() {
  41     // Non-randomized variant. En-passant possible:
  42     return "pppppppp/8/8/8/8/8/8/PPPPPPPP w 0 -";
  43   }
  44
  45   filterValid(moves) {
  46     return moves;
  47   }
  48
  49   prePlay() {}
  50   postPlay() {}
  51   preUndo() {}
  52   postUndo() {}
  53
  54   getCheckSquares() {
  55     return [];
  56   }
  57
  58   getCurrentScore() {
  59     // Turn has changed:
  60     const color = V.GetOppCol(this.turn);
  61     const lastRank = (color == "w" ? 0 : V.size.x - 1);
  62     if (ArrayFun.range(8).some(i => this.getColor(lastRank, i) == color))
  63       // The opposing edge is reached!
  64       return color == "w" ? "1-0" : "0-1";
  65     if (this.atLeastOneMove()) return "*";
  66     // Stalemate (will probably never happen)
  67     return "1/2";
  68   }
  69
  70   getNotation(move) {
  71     return V.CoordsToSquare(move.start) + V.CoordsToSquare(move.end);
  72   }
  73
  74 };