chess-easy/dist/game/FenGenerator.js

Chess engine that makes writing chessgame easier than writing a calculator

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const common_1 = require("../types/common");
const utils_1 = require("../utils");
class FenGenerator {
    static generateGameStateString(gameState) {
        const rows = [...gameState].reverse().map((row) => {
            let rowResult = "";
            row.forEach((field) => {
                if (!field) {
                    if (rowResult.length) {
                        const lastLetterIndex = rowResult.length - 1;
                        const emptyFieldsNumber = Number(rowResult[lastLetterIndex]);
                        if (isNaN(emptyFieldsNumber)) {
                            rowResult += "1";
                        }
                        else {
                            rowResult =
                                rowResult.substring(0, lastLetterIndex) +
                                    String(emptyFieldsNumber + 1);
                        }
                    }
                    else {
                        rowResult += "1";
                    }
                }
                else {
                    const fenSymbol = (0, utils_1.fieldToFenSymbol)(field);
                    rowResult += fenSymbol;
                }
            });
            return rowResult;
        });
        return rows.join("/");
    }
    static generateMovesNextString(movesNext) {
        return movesNext === common_1.Colors.WHITE ? "w" : "b";
    }
    static generateFen(gameState, movesNext, castlingAvailability, enPassantPossibility, halfMoveClock, fullMoveNumber) {
        return [
            this.generateGameStateString(gameState),
            this.generateMovesNextString(movesNext),
            castlingAvailability || "-",
            enPassantPossibility,
            String(halfMoveClock),
            String(fullMoveNumber),
        ].join(" ");
    }
}
exports.default = FenGenerator;
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