tildes-reextended/source/utilities/groups.ts

import {log} from './logging.js';
import {querySelectorAll} from './query-selectors.js';

/**
 * Tries to extract and save the groups. Returns the current saved groups when
 * the user is not in `/groups` and the new ones when they are in `/groups`.
 */
export function extractGroups(): string[] | undefined {
  if (window.location.pathname !== '/groups') {
    log('Not in "/groups", returning early.');
    return;
  }

  return querySelectorAll('.link-group').map(
    (value) => value.textContent ?? '<unknown group>',
  );
}