client/src/variants/Teleport2.js

   1 import { Teleport1Rules } from "@/variants/Teleport1";
   2
   3 export class Teleport2Rules extends Teleport1Rules {
   4
   5   canTake([x1, y1], [x2, y2]) {
   6     // Cannot teleport king:
   7     return (this.subTurn == 1 && this.getPiece(x2, y2) != V.KING);
   8   }
   9
  10   underCheck(color) {
  11     // Standard method:
  12     return this.isAttacked(this.kingPos[color], V.GetOppCol(color));
  13   }
  14
  15   postPlay(move) {
  16     if (move.vanish.length > 0) {
  17       // Standard method:
  18       if (move.appear[0].p == V.KING)
  19         this.kingPos[move.appear[0].c] = [move.appear[0].x, move.appear[0].y];
  20       this.updateCastleFlags(move);
  21     }
  22   }
  23
  24   updateCastleFlags(move) {
  25     // Standard method: TODO = find a better way... (not rewriting)
  26     const c = move.vanish[0].c;
  27     const firstRank = (c == "w" ? V.size.x - 1 : 0);
  28     const oppCol = this.turn;
  29     const oppFirstRank = V.size.x - 1 - firstRank;
  30     if (move.vanish[0].p == V.KING && move.appear.length > 0)
  31       this.castleFlags[c] = [V.size.y, V.size.y];
  32     else if (
  33       move.start.x == firstRank &&
  34       this.castleFlags[c].includes(move.start.y)
  35     ) {
  36       const flagIdx = (move.start.y == this.castleFlags[c][0] ? 0 : 1);
  37       this.castleFlags[c][flagIdx] = V.size.y;
  38     }
  39     if (
  40       move.end.x == oppFirstRank &&
  41       this.castleFlags[oppCol].includes(move.end.y)
  42     ) {
  43       const flagIdx = (move.end.y == this.castleFlags[oppCol][0] ? 0 : 1);
  44       this.castleFlags[oppCol][flagIdx] = V.size.y;
  45     }
  46   }
  47
  48   postUndo(move) {
  49     if (move.vanish.length > 0) {
  50       // Standard method:
  51       const c = this.getColor(move.start.x, move.start.y);
  52       if (this.getPiece(move.start.x, move.start.y) == V.KING)
  53         this.kingPos[c] = [move.start.x, move.start.y];
  54     }
  55   }
  56
  57 };