Pandemonium 1 & 2, Stealthbomb 1 & 2

[vchess.git] / client / src / variants / Pandemonium1.js

diff --git a/client/src/variants/Pandemonium1.js b/client/src/variants/Pandemonium1.js
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+import { Pandemonium2Rules } from "@/variants/Pandemonium2";
+
+export class Pandemonium1Rules extends Pandemonium2Rules {
+
+  static get PawnSpecs() {
+    return Object.assign(
+      { },
+      Pandemonium2Rules.PawnSpecs,
+      { threeSquares: true }
+    );
+  }
+
+  static get size() {
+    return { x: 10, y: 10};
+  }
+
+  static IsGoodEnpassant(enpassant) {
+    if (enpassant != "-") {
+      const squares = enpassant.split(",");
+      if (squares.length > 2) return false;
+      for (let sq of squares) {
+        if (!sq.match(/[a-j0-9]/)) return false;
+      }
+    }
+    return true;
+  }
+
+  static GenRandInitFen(randomness) {
+    const baseFen = Pandemonium2Rules.GenRandInitFen(randomness)
+    return baseFen.substr(0, 22) + "91/91/" + baseFen.substr(22);
+  }
+
+  getEnpassantFen() {
+    const L = this.epSquares.length;
+    if (!this.epSquares[L - 1]) return "-"; //no en-passant
+    let res = "";
+    this.epSquares[L - 1].forEach(sq => {
+      res += V.CoordsToSquare(sq) + ",";
+    });
+    return res.slice(0, -1); //remove last comma
+  }
+
+  getEpSquare(moveOrSquare) {
+    if (!moveOrSquare) return undefined;
+    if (typeof moveOrSquare === "string") {
+      const square = moveOrSquare;
+      if (square == "-") return undefined;
+      let res = [];
+      square.split(",").forEach(sq => {
+        res.push(V.SquareToCoords(sq));
+      });
+      return res;
+    }
+    // Argument is a move:
+    const move = moveOrSquare;
+    const [sx, sy, ex] = [move.start.x, move.start.y, move.end.x];
+    if (this.getPiece(sx, sy) == V.PAWN && Math.abs(sx - ex) >= 2) {
+      const step = (ex - sx) / Math.abs(ex - sx);
+      let res = [{
+        x: sx + step,
+        y: sy
+      }];
+      if (sx + 2 * step != ex) {
+        // 3-squares jump
+        res.push({
+          x: sx + 2 * step,
+          y: sy
+        });
+      }
+      return res;
+    }
+    return undefined; //default
+  }
+
+  applyPromotions(moves, promoted) {
+    const lastRanks = (this.turn == 'w' ? [0, 1] : [V.size.x - 1, V.size.x]);
+    let promotions = [];
+    moves.forEach(m => {
+      if (lastRanks.includes(m.start.x) || lastRanks.includes(m.end.x)) {
+        let pMove = JSON.parse(JSON.stringify(m));
+        pMove.appear[0].p = promoted;
+        promotions.push(pMove);
+      }
+    });
+    Array.prototype.push.apply(moves, promotions);
+  }
+
+  addPawnMoves([x1, y1], [x2, y2], moves) {
+    const color = this.turn;
+    const lastRanks = (color == "w" ? [0, 1] : [V.size.x - 1, V.size.x - 2]);
+    if (!lastRanks.includes(x2)) {
+      moves.push(this.getBasicMove([x1, y1], [x2, y2]));
+      return;
+    }
+    let finalPieces = [V.GILDING];
+    if (x2 == lastRanks[1]) finalPieces.push(V.PAWN);
+    for (let piece of finalPieces) {
+      const tr = (piece != V.PAWN ? { c: color, p: piece } : null);
+      moves.push(this.getBasicMove([x1, y1], [x2, y2], tr));
+    }
+  }
+
+  getEnpassantCaptures([x, y], shiftX) {
+    const Lep = this.epSquares.length;
+    const epSquare = this.epSquares[Lep - 1];
+    let moves = [];
+    if (!!epSquare) {
+      for (let epsq of epSquare) {
+        // TODO: some redundant checks
+        if (epsq.x == x + shiftX && Math.abs(epsq.y - y) == 1) {
+          let enpassantMove = this.getBasicMove([x, y], [epsq.x, epsq.y]);
+          // WARNING: the captured pawn may be diagonally behind us,
+          // if it's a 3-squares jump and we take on 1st passing square
+          const px = this.board[x][epsq.y] != V.EMPTY ? x : x - shiftX;
+          enpassantMove.vanish.push({
+            x: px,
+            y: epsq.y,
+            p: "p",
+            c: this.getColor(px, epsq.y)
+          });
+          moves.push(enpassantMove);
+        }
+      }
+    }
+    return moves;
+  }
+
+};