GetStatsForSession.js

gistfile1.txt

function getStats(code) {
  const flatten = (arr, depth = 1) => arr.reduce((a, v) => a.concat(depth > 1 && Array.isArray(v) ? flatten(v, depth - 1) : v), []);
  const words = (str='', pattern = /[^a-zA-Z-]+/) => str.split(pattern).filter(Boolean);
  const stats = {};

  const { _id: session, document } = db.sessions.findOne({ code });
  const { pages } = db.documents.findOne({ _id: document });
  stats.pageCount = pages.length;

  const pageObjects = db.pages.find({ _id: { $in: pages } });
  
  const atoms = flatten(pageObjects.map(({ atoms }) => atoms));
  stats.atomCount = atoms.length;

  const answers = db.answers.find({ atom: { $in: atoms } }).toArray();
  stats.answerCount = answers.length;

  const notes = db.notes.find({ page: { $in: pages } }, '').toArray();
  stats.noteCount = notes.length;

  // stats.noteWordCount = words(notes.reduce((acc, { data }) => `${acc} ${data}`)).length;

  const questions = db.questions.find({ session, state: { $ne: 'deleted' } }).toArray();
  stats.questionCount = questions.length;

  const claps = db.claps.find({ page: { $in: pages } }).toArray();
  stats.clapCount = claps.length;

  return stats;
}