client/src/variants/Squatter2.js

   1 import { ChessRules } from "@/base_rules";
   2 import { SuicideRules } from "@/variants/Suicide";
   3
   4 export class Squatter2Rules extends ChessRules {
   5
   6   static get HasFlags() {
   7     return false;
   8   }
   9
  10   static get PawnSpecs() {
  11     return Object.assign(
  12       {},
  13       ChessRules.PawnSpecs,
  14       { promotions: ChessRules.PawnSpecs.promotions.concat([V.KING]) }
  15     );
  16   }
  17
  18   static get Lines() {
  19     return [
  20       // White goal:
  21       [[0, 3], [0, 5]],
  22       [[0, 5], [1, 5]],
  23       [[1, 5], [1, 3]],
  24       [[1, 3], [0, 3]],
  25       // Black goal:
  26       [[8, 3], [8, 5]],
  27       [[8, 5], [7, 5]],
  28       [[7, 5], [7, 3]],
  29       [[7, 3], [8, 3]]
  30     ];
  31   }
  32
  33   static IsGoodPosition(position) {
  34     if (position.length == 0) return false;
  35     const rows = position.split("/");
  36     if (rows.length != V.size.x) return false;
  37     // Just check that at least one piece of each color is there:
  38     let pieces = { "w": 0, "b": 0 };
  39     for (let row of rows) {
  40       let sumElts = 0;
  41       for (let i = 0; i < row.length; i++) {
  42         const lowerRi = row[i].toLowerCase();
  43         if (V.PIECES.includes(lowerRi)) {
  44           pieces[row[i] == lowerRi ? "b" : "w"]++;
  45           sumElts++;
  46         }
  47         else {
  48           const num = parseInt(row[i], 10);
  49           if (isNaN(num)) return false;
  50           sumElts += num;
  51         }
  52       }
  53       if (sumElts != V.size.y) return false;
  54     }
  55     if (Object.values(pieces).some(v => v == 0)) return false;
  56     return true;
  57   }
  58
  59   scanKings() {}
  60
  61   filterValid(moves) {
  62     return moves;
  63   }
  64
  65   getCheckSquares() {
  66     return [];
  67   }
  68
  69   // No variables update because no royal king + no castling
  70   prePlay() {}
  71   postPlay() {}
  72   preUndo() {}
  73   postUndo() {}
  74
  75   getCurrentScore() {
  76     const oppCol = V.GetOppCol(this.turn);
  77     const goal = (oppCol == 'w' ? 0 : 7);
  78     if (this.board[goal].slice(3, 5).some(b => b[0] == oppCol))
  79       return oppCol == 'w' ? "1-0" : "0-1";
  80     if (this.atLeastOneMove()) return "*";
  81     return "1/2";
  82   }
  83
  84   static GenRandInitFen(randomness) {
  85     return SuicideRules.GenRandInitFen(randomness);
  86   }
  87
  88 };