client/src/variants/Rifle.js

   1 import { ChessRules, PiPo, Move } from "@/base_rules";
   2
   3 export class RifleRules extends ChessRules {
   4
   5   getBasicMove([sx, sy], [ex, ey], tr) {
   6     let mv = new Move({
   7       appear: [],
   8       vanish: [],
   9       start: {x:sx, y:sy},
  10       end: {x:ex, y:ey}
  11     });
  12     if (this.board[ex][ey] != V.EMPTY) {
  13       // No movement: just vanishing enemy piece
  14       mv.vanish = [
  15         new PiPo({
  16           x: ex,
  17           y: ey,
  18           c: this.getColor(ex, ey),
  19           p: this.getPiece(ex, ey)
  20         })
  21       ];
  22     }
  23     else {
  24       // Normal move
  25       mv.appear = [
  26         new PiPo({
  27           x: ex,
  28           y: ey,
  29           c: tr ? tr.c : this.getColor(sx, sy),
  30           p: tr ? tr.p : this.getPiece(sx, sy)
  31         })
  32       ];
  33       mv.vanish = [
  34         new PiPo({
  35           x: sx,
  36           y: sy,
  37           c: this.getColor(sx, sy),
  38           p: this.getPiece(sx, sy)
  39         })
  40       ];
  41     }
  42
  43     return mv;
  44   }
  45
  46   getEnpassantCaptures([x, y], shiftX) {
  47     let moves = [];
  48     const Lep = this.epSquares.length;
  49     const epSquare = this.epSquares[Lep - 1]; //always at least one element
  50     if (
  51       !!epSquare &&
  52       epSquare.x == x + shiftX &&
  53       Math.abs(epSquare.y - y) == 1
  54     ) {
  55       let enpassantMove = new Move({
  56         appear: [],
  57         vanish: [],
  58         start: {x:x, y:y},
  59         end: {x:x+shiftX, y:epSquare.y}
  60       });
  61       enpassantMove.vanish.push({
  62         x: x,
  63         y: epSquare.y,
  64         p: "p",
  65         c: this.getColor(x, epSquare.y)
  66       });
  67       moves.push(enpassantMove);
  68     }
  69     return moves;
  70   }
  71
  72   static get SEARCH_DEPTH() {
  73     return 2;
  74   }
  75
  76 };