@ctrl/magnet-link/dist/src/bep53.js

Parse a magnet URI into an object

export function composeRange(range) {
    return range
        .reduce((acc, cur, idx, arr) => {
        if (idx === 0 || cur !== arr[idx - 1] + 1) {
            acc.push([]);
        }
        acc[acc.length - 1].push(`${cur}`);
        return acc;
    }, [])
        .map(cur => (cur.length > 1 ? `${cur[0]}-${cur[cur.length - 1]}` : `${cur[0]}`));
}
export function parseRange(range) {
    const generateRange = (start, end = start) => Array.from({ length: end - start + 1 }, (_, idx) => idx + start);
    return range.reduce((acc, cur) => {
        const r = cur.split('-').map(cur => parseInt(cur, 10));
        return acc.concat(generateRange(r[0], r[1]));
    }, []);
}