block4.ts

import { ParsedUrlQuery } from 'querystring';

const addQueryToParsedUrl = (queryToAppend: ParsedUrlQuery) => (
    parsedUrl: UrlWithParsedQuery,
): UrlWithParsedQuery => {
    const {
        auth,
        protocol,
        host,
        hash,
        pathname,
        query: existingQuery,
    } = parsedUrl;
    const newQuery = { ...existingQuery, ...queryToAppend };
    const newParsedUrl = {
        auth,
        protocol,
        host,
        hash,
        pathname,
        query: newQuery,
    };
    return newParsedUrl;
};

const addQueryToUrl = pipe(
    addQueryToParsedUrl,
    mapUrl,
);