Attempt to fix promotions on mobile browsers
[vchess.git] / client / src / variants / Capture.js
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6b7b2cf7
BA
1import { ChessRules } from "@/base_rules";
2import { ArrayFun } from "@/utils/array";
3import { randInt } from "@/utils/alea";
4
5export const VariantRules = class LosersRules extends ChessRules {
6 // Trim all non-capturing moves
7 static KeepCaptures(moves) {
8 return moves.filter(m => m.vanish.length == 2);
9 }
10
11 // Stop at the first capture found (if any)
12 atLeastOneCapture() {
13 const color = this.turn;
14 const oppCol = V.GetOppCol(color);
15 for (let i = 0; i < V.size.x; i++) {
16 for (let j = 0; j < V.size.y; j++) {
17 if (
18 this.board[i][j] != V.EMPTY &&
19 this.getColor(i, j) != oppCol &&
20 this.getPotentialMovesFrom([i, j]).some(m =>
21 // Warning: duscard castle moves
22 m.vanish.length == 2 && m.appear.length == 1)
23 ) {
24 return true;
25 }
26 }
27 }
28 return false;
29 }
30
31 getPossibleMovesFrom(sq) {
32 let moves = this.filterValid(this.getPotentialMovesFrom(sq));
33 const captureMoves = V.KeepCaptures(moves);
34 if (captureMoves.length > 0) return captureMoves;
35 if (this.atLeastOneCapture()) return [];
36 return moves;
37 }
38
39 getAllValidMoves() {
40 const moves = super.getAllValidMoves();
41 if (moves.some(m => m.vanish.length == 2)) return V.KeepCaptures(moves);
42 return moves;
43 }
44
45 static get SEARCH_DEPTH() {
46 return 4;
47 }
48};