Refactor models (merge Players in Games), add cursor to correspondance games. Finishe...
[vchess.git] / client / src / variants / Atomic.js
1 import { ChessRules, PiPo } from "@/base_rules";
2
3 export const VariantRules = class AtomicRules extends ChessRules {
4 getEpSquare(moveOrSquare) {
5 if (typeof moveOrSquare !== "object" || moveOrSquare.appear.length > 0)
6 return super.getEpSquare(moveOrSquare);
7 // Capturing move: no en-passant
8 return undefined;
9 }
10
11 getPotentialMovesFrom([x, y]) {
12 let moves = super.getPotentialMovesFrom([x, y]);
13
14 // Handle explosions
15 moves.forEach(m => {
16 // NOTE: if vanish.length==2 and appear.length==2, this is castle
17 if (m.vanish.length > 1 && m.appear.length <= 1) {
18 // Explosion! (TODO?: drop moves which explode our king here)
19 let steps = [
20 [-1, -1],
21 [-1, 0],
22 [-1, 1],
23 [0, -1],
24 [0, 1],
25 [1, -1],
26 [1, 0],
27 [1, 1]
28 ];
29 for (let step of steps) {
30 let x = m.end.x + step[0];
31 let y = m.end.y + step[1];
32 if (
33 V.OnBoard(x, y) &&
34 this.board[x][y] != V.EMPTY &&
35 this.getPiece(x, y) != V.PAWN
36 ) {
37 m.vanish.push(
38 new PiPo({
39 p: this.getPiece(x, y),
40 c: this.getColor(x, y),
41 x: x,
42 y: y
43 })
44 );
45 }
46 }
47 m.end = { x: m.appear[0].x, y: m.appear[0].y };
48 m.appear.pop(); //Nothin appears in this case
49 }
50 });
51
52 return moves;
53 }
54
55 getPotentialKingMoves([x, y]) {
56 // King cannot capture:
57 let moves = [];
58 const steps = V.steps[V.ROOK].concat(V.steps[V.BISHOP]);
59 for (let step of steps) {
60 const i = x + step[0];
61 const j = y + step[1];
62 if (V.OnBoard(i, j) && this.board[i][j] == V.EMPTY)
63 moves.push(this.getBasicMove([x, y], [i, j]));
64 }
65 return moves.concat(this.getCastleMoves([x, y]));
66 }
67
68 isAttacked(sq, colors) {
69 if (
70 this.getPiece(sq[0], sq[1]) == V.KING &&
71 this.isAttackedByKing(sq, colors)
72 )
73 return false; //king cannot take...
74 return (
75 this.isAttackedByPawn(sq, colors) ||
76 this.isAttackedByRook(sq, colors) ||
77 this.isAttackedByKnight(sq, colors) ||
78 this.isAttackedByBishop(sq, colors) ||
79 this.isAttackedByQueen(sq, colors)
80 );
81 }
82
83 postPlay(move) {
84 super.postPlay(move);
85 if (move.appear.length == 0) {
86 // Capture
87 const firstRank = { w: 7, b: 0 };
88 for (let c of ["w", "b"]) {
89 // Did we explode king of color c ? (TODO: remove move earlier)
90 if (
91 Math.abs(this.kingPos[c][0] - move.end.x) <= 1 &&
92 Math.abs(this.kingPos[c][1] - move.end.y) <= 1
93 ) {
94 this.kingPos[c] = [-1, -1];
95 this.castleFlags[c] = [8, 8];
96 } else {
97 // Now check if init rook(s) exploded
98 if (Math.abs(move.end.x - firstRank[c]) <= 1) {
99 if (Math.abs(move.end.y - this.castleFlags[c][0]) <= 1)
100 this.castleFlags[c][0] = 8;
101 if (Math.abs(move.end.y - this.castleFlags[c][1]) <= 1)
102 this.castleFlags[c][1] = 8;
103 }
104 }
105 }
106 }
107 }
108
109 postUndo(move) {
110 super.postUndo(move);
111 const c = this.turn;
112 const oppCol = V.GetOppCol(c);
113 if ([this.kingPos[c][0], this.kingPos[oppCol][0]].some(e => e < 0)) {
114 // There is a chance that last move blowed some king away..
115 for (let psq of move.vanish) {
116 if (psq.p == "k")
117 this.kingPos[psq.c == c ? c : oppCol] = [psq.x, psq.y];
118 }
119 }
120 }
121
122 underCheck(color) {
123 const oppCol = V.GetOppCol(color);
124 let res = undefined;
125 // If our king disappeared, move is not valid
126 if (this.kingPos[color][0] < 0) res = true;
127 // If opponent king disappeared, move is valid
128 else if (this.kingPos[oppCol][0] < 0) res = false;
129 // Otherwise, if we remain under check, move is not valid
130 else res = this.isAttacked(this.kingPos[color], [oppCol]);
131 return res;
132 }
133
134 getCheckSquares(color) {
135 let res = [];
136 if (
137 this.kingPos[color][0] >= 0 && //king might have exploded
138 this.isAttacked(this.kingPos[color], [V.GetOppCol(color)])
139 ) {
140 res = [JSON.parse(JSON.stringify(this.kingPos[color]))];
141 }
142 return res;
143 }
144
145 getCurrentScore() {
146 const color = this.turn;
147 const kp = this.kingPos[color];
148 if (kp[0] < 0)
149 // King disappeared
150 return color == "w" ? "0-1" : "1-0";
151 if (this.atLeastOneMove())
152 return "*";
153 if (!this.isAttacked(kp, [V.GetOppCol(color)])) return "1/2";
154 return color == "w" ? "0-1" : "1-0"; //checkmate
155 }
156 };