Moves the normal layout of a Path of Exile hideout to the scourged version, and vice versa.

Scourge.cjs

const { readFileSync, writeFileSync } = require("fs");
const { resolve } = require("path");

const FlippedBit       = 0b1000_0000;
const ScourgedBit      = 0b0100_0000;
const VariationBitMask = 0b0011_1111;

function check(condition, message = "assertion failed") {
    if (!condition) {
        console.error(message);
        process.exit(-1);
    }
}

const file = process.argv[2];
check(file !== undefined, "missing target file");

const sourceFile = resolve(file);
const targetFile = sourceFile.replace(/\.hideout$/, ".scourged.hideout");

const encoding = "utf-8";
const sourceContent = readFileSync(sourceFile, encoding);
const targetContent = sourceContent.replaceAll(
    /"fv": (\d+)/g, 
    (_, digits) => {
        const oldValue = Number(digits);
        check(Number.isInteger(oldValue));
        const newValue = oldValue ^ ScourgedBit;
        return `"fv": ${newValue}`;
    },
);

writeFileSync(targetFile, targetContent, encoding);