foocafe-event-extractor.js

(function() {
  // Run this script in the console to add the foo cae event to the calendar.

  'use strict';
  let url = document.location.href;
  let title = document.querySelector('h1').textContent;
  let timestamp = document.querySelector('.eventtime p').textContent.trim();
  let datematch = timestamp.match(/, (\w+) (\d+)/);
  let from = new Date();
  from.setMonth('January Februari March April May June July August September October November December'.split(' ').indexOf(datematch[1]));
  from.setDate(datematch[2]);
  from.setHours(timestamp.match(/(\d+)\.\d+ -/)[1]);
  from.setMinutes(timestamp.match(/\d+\.(\d+) -/)[1]);
  from.setSeconds(0);
  from.setMilliseconds(0);
  let to = new Date(from);
  to.setHours(timestamp.match(/- (\d+)\.\d+/)[1]);
  to.setMinutes(timestamp.match(/- \d+\.(\d+)/)[1]);
  let columns = Array.from(document.querySelectorAll('.column'));
  let text = columns.map(element => element.querySelector(':scope > p').textContent).join(' ').replace(/\n/g, '\\n');

  let card = `
BEGIN:VCALENDAR
VERSION:2.0
BEGIN:VEVENT
DTSTART:${format(from)}
DTEND:${format(to)}
SUMMARY:${title}
DESCRIPTION:${text}
LOCATION:Foo Café
URL;VALUE=URI:${url}
END:VEVENT
END:VCALENDAR
  `.trim();
  
  document.location = `data:text/calendar,${encodeURIComponent(card)}`;

  function format(date) {
    return date.toISOString().replace(/\.\d\d\dZ/, 'Z').replace(/[-:\.]/g, '');
  }
}());