Woov (https://woov.com/) event timetable to ical. Designed to run in NodeJS, but can be adapted for browser if needed.

woov_timetable_2_ical.js

const fs = require('fs');
const { exit } = require('process');
const readline = require('readline');
const rl = readline.createInterface({ input: process.stdin, output: process.stdout });
const prompt = query => new Promise(resolve => rl.question(query, resolve));
const {sep} = require('path')

// TODO: The current color-coding does not work (first, it seems to be the same for every stage in woov; second, ical expects CSS3 named colors and not css hex string like woov provides)
// TODO: The schema provides the possibility to set artist overrides per show. Have never seen one being set, though. Thus not yet implemented.

const query = `
query ($eid: ID!, $after: String) {
  event(eventId: $eid) {
    name
    shows(first: 100, after: $after) {
      pageInfo {
        hasNextPage
        endCursor
      }
      edges {
        node {
          rawId
          start
          end
          artists {
            name
            imageUrl
            links {
              url
            }
            description
          }
          #artistOverrides {
          #  artistId
          #  name
          #  description
          #  image
          #  imageUrl
          #}
          stage {
            name
            color
            # description
          }
        }
      }
    }
  }
}
`;

const array_chunks = (array, chunk_size) => Array(Math.ceil(array.length / chunk_size)).fill().map((_, index) => index * chunk_size).map(begin => array.slice(begin, begin + chunk_size));

(async () => {
  var flat = [];
  let nextPage = true;
  let endCursor = null;
  const eventId = await prompt('enter your Woov Event ID (see Woov Invite link like https://gowoov.com/event/XXXXX): ');
  let eventName = 'Event Timetable';

  do {
    let body = JSON.stringify({
      query,
      variables: {
        eid: eventId,
        after: endCursor
      }
    })
    let response = await (
      await fetch('https://api.woov.nl/graphql',{
        method: 'POST',
        body,
        headers:{
          'Content-Type': 'application/json'
        }
      })
    ).json();

    if (response.errors) {
      throw new Error(response.errors[0].message);
    }
    eventName = response.data.event.name;
    nextPage = response.data.event.shows.pageInfo.hasNextPage;
    endCursor = response.data.event.shows.pageInfo.endCursor;
    flat.push(...response.data.event.shows.edges.map(e => e.node));
    console.log('loaded', flat.length, 'shows.')
  } while (nextPage);

  var ics = `BEGIN:VCALENDAR\r
PRODID:${__filename.slice(__filename.lastIndexOf(sep))}\r
VERSION:2.0\r
CALSCALE:GREGORIAN\r
NAME:${eventName}\r
BEGIN:VEVENT\r
`;
  ics += flat.map(n => {
    let start = new Date(n.start);
    let end = new Date(n.end);
    let desc = n.artists[0].description ?? '';
    if (n.artists[0].links.length > 0) {
      desc += '\n\nLinks:\n';
      desc += n.artists[0].links.map(l => l.url).join('\n');
    }
    function icalDate(jsDate) {
      let result = '';
      result += jsDate.getFullYear().toString().padStart(4, '0');
      result += (jsDate.getMonth() + 1).toString().padStart(2, '0');
      result += jsDate.getDate().toString().padStart(2, '0');
      result += 'T' + jsDate.getHours().toString().padStart(2, '0');
      result += jsDate.getMinutes().toString().padStart(2, '0');
      result += jsDate.getSeconds().toString().padStart(2, '0');
      return result;
    }
    let details = `UID:${n.rawId}\r
SUMMARY:${n.artists.map(a => a.name).join(' & ')}\r
DTSTAMP:${icalDate(start)}\r
DESCRIPTION:${array_chunks(desc.replace(/\r?\n/g, '\\n'),63).join('\r\n\t')}\r
DTSTART:${icalDate(start)}\r
DTEND:${icalDate(end)}\r
LOCATION:${n.stage.name}\r
CATEGORIES:${n.stage.name}\r
COLOR:${n.stage.color}`;
if(n.artists.flatMap(a=>a.links).length > 0){
  details += '\r\n'+n.artists.flatMap(a=>a.links).map(l=>"ATTACH:"+l.url).join('\r\n')
}
if(n.artists[0].imageUrl){
  details += `\r\nIMAGE;VALUE=URI:${n.artists[0].imageUrl}`
}
return details;
  }).join(`\r
END:VEVENT\r
BEGIN:VEVENT\r
`);

  ics += `\r
END:VEVENT\r
END:VCALENDAR\r
`;
  fs.writeFileSync('timetable_2.ics', ics);
  console.log('done')
  exit(0)
})();