koishi-plugin-chess/lib/games/go.js

Playing chess games in Koishi

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.update = void 0;
const directions = [[-1, 0], [1, 0], [0, -1], [0, 1]];
function findEaten(state, x, y) {
    const value = state.get(x, y);
    if (!value)
        return 0n;
    let found = 0n;
    function findLife(x, y) {
        found |= state.bit(x, y);
        const points = [];
        for (const [dx, dy] of directions) {
            const i = x + dx, j = y + dy;
            if (!state.inRange(i, j) || found & state.bit(i, j))
                continue;
            const next = state.get(i, j);
            if (!next)
                return true;
            if (next === -value)
                continue;
            if (next === value)
                points.push([i, j]);
        }
        for (const [i, j] of points) {
            const result = findLife(i, j);
            if (result)
                return true;
        }
    }
    return findLife(x, y) ? 0n : found;
}
function update(x, y, value) {
    const { bBoard, wBoard } = this;
    if (value === 1) {
        this.bBoard |= this.bit(x, y);
    }
    else {
        this.wBoard |= this.bit(x, y);
    }
    let diff = 0n;
    for (const [dx, dy] of directions) {
        const i = x + dx, j = y + dy;
        if (!this.inRange(i, j))
            continue;
        if (this.get(i, j) === -value) {
            diff |= findEaten(this, i, j);
        }
    }
    if (diff) {
        if (value === 1) {
            this.wBoard ^= diff;
        }
        else {
            this.bBoard ^= diff;
        }
    }
    else if (findEaten(this, x, y)) {
        this.bBoard = bBoard;
        this.wBoard = wBoard;
        return '不入子';
    }
    if (this.history.includes((this.wBoard << this.area) + this.bBoard)) {
        this.bBoard = bBoard;
        this.wBoard = wBoard;
        return '全局同形';
    }
}
exports.update = update;