ensl_gathers/app/javascripts/helper.js

// Accepts an array of IDs voted
// 1. Creates an array of tally objects,
//		with ID as prop and vote count as val { 12: 0 }
// 2. Increments ID vote tally for every vote
// 3. Sorts

const rankVotes = function (votes, candidates) {
  var initial = candidates.reduce(function (acc, candidate) {
    acc[candidate.id] = 0;
    return acc;
  }, {});

  var scores = votes.reduce(function (acc, id) {
    if (acc[id] !== undefined) {
      acc[id]++;
    }
    return acc;
  }, initial);

  var rank = [];

  for (var id in scores) {
    if (scores.hasOwnProperty(id)) {
      rank.push({
        id: parseInt(id, 10),
        count: scores[id]
      });
    }
  }

  return rank.sort(function (a, b) {
    if (b.count === a.count) {
      return b.id - a.id;
    } else {
      return b.count - a.count;
    }
  }).map(function (tally) {
    return tally.id
  }).map(function (id) {
    return candidates.reduce(function (acc, candidate) {
      if (candidate.id === id) return candidate;
      return acc;
    });
  });
};

const enslUrl = (gatherer) => {
  return `https://www.ensl.org/users/${gatherer.id}`
};

const hiveUrl = (gatherer) => {
  const hiveId = gatherer.user.hive.id;
  if (hiveId) {
    return `http://hive.naturalselection2.com/profile/${hiveId}`;
  } else {
    return null;
  }
};

const modalId = (user) => {
  return `user-modal-${user.id}`;
};

const storageAvailable = (type) => {
  try {
    var storage = window[type],
      x = '__storage_test__';
    storage.setItem(x, x);
    storage.removeItem(x);
    return true;
  }
  catch (e) {
    return false;
  }
};

const observatoryUrl = (gatherer) => {
  const steamId = gatherer.user.steam.id;
  if (steamId) {
    return `https://observatory.morrolan.ch/player?steam_id=STEAM_${steamId}`;
  } else {
    return null;
  }
};

export { enslUrl, hiveUrl, modalId, observatoryUrl, rankVotes, storageAvailable }