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

Parse a magnet URI into an object

const maxSelectOnlyFiles = 100_000;
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]}`));
}
function generateRange(start, end, out) {
    if (!Number.isSafeInteger(start) || !Number.isSafeInteger(end) || start < 0 || end < start) {
        return;
    }
    if (out.length + end - start + 1 > maxSelectOnlyFiles) {
        return;
    }
    for (let i = start; i <= end; i++) {
        out.push(i);
    }
}
export function parseRange(range) {
    const acc = [];
    // eslint-disable-next-line typescript-eslint/prefer-for-of -- indexed for-loop is faster
    for (let i = 0; i < range.length; i++) {
        const cur = range[i];
        const dash = cur.indexOf('-');
        if (dash === -1) {
            const index = +cur;
            if (Number.isSafeInteger(index) && index >= 0 && acc.length < maxSelectOnlyFiles) {
                acc.push(index);
            }
        }
        else if (dash > 0 && dash < cur.length - 1) {
            generateRange(+cur.slice(0, dash), +cur.slice(dash + 1), acc);
        }
    }
    return acc;
}