variants/Avalam/class.js

   1 import ChessRules from "/base_rules.js";
   2 import {Random} from "/utils/alea.js";
   3 import PiPo from "/utils/PiPo.js";
   4 import Move from "/utils/Move.js";
   5
   6 export default class AvalamRules extends ChessRules {
   7
   8   static get Options() {
   9     return {
  10       select: [{
  11         label: "Randomness",
  12         variable: "randomness",
  13         defaut: 1,
  14         options: [
  15           {label: "Deterministic", value: 0},
  16           {label: "Random", value: 1},
  17         ]
  18       }],
  19       input: [
  20         {
  21           label: "Free placement",
  22           variable: "freefill",
  23           type: "checkbox",
  24           defaut: false
  25         }
  26       ]
  27     };
  28   }
  29
  30   get hasFlags() {
  31     return false;
  32   }
  33   get hasEnpassant() {
  34     return false;
  35   }
  36
  37   pieces(color, x, y) {
  38     const steps = [
  39       [1, 0], [0, 1], [-1, 0], [0, -1],
  40       [1, 1], [1, -1], [-1, 1], [-1, -1]
  41     ];
  42     return {
  43       'b': {
  44         "class": "stack",
  45         both: [{steps: steps, range: 1}]
  46       },
  47       'c': {
  48         "class": "stack2",
  49         moveas: 'b'
  50       },
  51       'd': {
  52         "class": "stack3",
  53         moveas: 'b'
  54       },
  55       'e': {
  56         "class": "stack4",
  57         moveas: 'b'
  58       },
  59       'f': {
  60         "class": "stack5",
  61         moveas: 'b'
  62       }
  63     };
  64   }
  65
  66   genRandInitBaseFen() {
  67     let fen = "";
  68     if (this.freefill)
  69       fen = "9/".repeat(8) + "9";
  70     else if (this.options["randomness"] == 0) {
  71       fen = "2Bb5/1BbBb4/1bBbBbB2/1BbBbBbBb/BbBb1bBbB/" +
  72             "bBbBbBbB1/2BbBbBb1/4bBbB1/5bB2";
  73     }
  74     else {
  75       const pieces = ('B'.repeat(24) + 'b'.repeat(24)).split("");
  76       const a = Random.shuffle(pieces, 48).join("");
  77       fen = (
  78         "2" + a.substr(0, 2) + "5/1" + a.substr(2, 4) +
  79         "4/1" + a.substr(6, 6) + "2/1" + a.substr(12, 8) +
  80         "/" + a.substr(20, 4) + "1" + a.substr(24, 4) +
  81         "/" + a.substr(28, 8) + "1/2" + a.substr(36, 6) +
  82         "1/4" + a.substr(42, 4) + "1/5" + a.substr(46, 2) + "2"
  83       );
  84     }
  85     return { fen: fen, o: {} };
  86   }
  87
  88   getSquareColorClass(x, y) {
  89     return "board-sq";
  90   }
  91
  92   get size() {
  93     return {x: 9, y: 9};
  94   }
  95
  96   onBoard(x, y) {
  97     if (!super.onBoard(x, y))
  98       return false;
  99     switch (x) {
 100       case 0:
 101         return [2, 3].includes(y);
 102       case 1:
 103         return [1, 2, 3, 4].includes(y);
 104       case 2:
 105         return [1, 2, 3, 4, 5, 6].includes(y);
 106       case 3:
 107         return y >= 1;
 108       case 4:
 109         return y != 4;
 110       case 5:
 111         return y <= 7;
 112       case 6:
 113         return [2, 3, 4, 5, 6, 7].includes(y);
 114       case 7:
 115         return [4, 5, 6, 7].includes(y);
 116       case 8:
 117         return [5, 6].includes(y);
 118     }
 119     return false; //never reached
 120   }
 121
 122   canIplay() {
 123     return this.playerColor == this.turn;
 124   }
 125
 126   doClick(coords) {
 127     if (!this.freefill || this.board[coords.x][coords.y] != "")
 128       return null;
 129     return new Move({
 130       start: {x: coords.x, y: coords.y},
 131       vanish: [],
 132       appear: [new PiPo({x: coords.x, y: coords.y, c: this.turn, p: 'b'})]
 133     });
 134   }
 135
 136   getBasicMove([x1, y1], [x2, y2]) {
 137     const cp1 = this.board[x1][y1],
 138           cp2 = this.board[x2][y2];
 139     const newPiece =
 140       String.fromCharCode(cp1.charCodeAt(1) + cp2.charCodeAt(1) - 97);
 141     return (
 142       new Move({
 143         vanish: [
 144           new PiPo({ x: x1, y: y1, c: cp1.charAt(0), p: cp1.charAt(1) }),
 145           new PiPo({ x: x2, y: y2, c: cp2.charAt(0), p: cp2.charAt(1) })
 146         ],
 147         appear: [
 148           new PiPo({ x: x2, y: y2, c: cp1.charAt(0), p: newPiece })
 149         ]
 150       })
 151     );
 152   }
 153
 154   getPotentialMovesFrom([x, y]) {
 155     const height = this.board[x][y].charCodeAt(1) - 97;
 156     if (height == 5)
 157       return [];
 158     let moves = [];
 159     for (let s of this.pieces(this.turn, x, y)['b'].both[0].steps) {
 160       const [i, j] = [x + s[0], y + s[1]];
 161       if (
 162         this.onBoard(i, j) &&
 163         this.board[i][j] != "" &&
 164         (height + this.board[i][j].charCodeAt(1) - 97 <= 5)
 165       ) {
 166         moves.push(this.getBasicMove([x, y], [i, j]));
 167       }
 168     }
 169     return moves;
 170   }
 171
 172   filterValid(moves) {
 173     return moves;
 174   }
 175
 176   getCurrentScore() {
 177     let towersCount = {w: 0, b: 0};
 178     for (let i = 0; i < this.size.x; i++) {
 179       for (let j = 0; j < this.size.y; j++) {
 180         if (this.board[i][j] != "") {
 181           if (this.getPotentialMovesFrom([i, j]).length > 0)
 182             return '*';
 183           towersCount[ this.board[i][j][0] ]++;
 184         }
 185       }
 186     }
 187     if (towersCount['w'] > towersCount['b'])
 188       return "1-0";
 189     if (towersCount['b'] > towersCount['w'])
 190       return "0-1";
 191     return "1/2";
 192   }
 193
 194 };