eventassigner-js/lib/countPlayersInEvent.js

A NPM package to assign groups / persons to events based on their preference

"use strict";

function countPlayersInEvent(groups, events, eventId) {
  var eInd = events.findIndex(function (e) {
    return e.id === eventId;
  });
  // return 0 if there are no groups in the event
  if (events[eInd].groups.length === 0) {
    return 0;
  }
  // sum up the individual group sizes
  var playerCount = events[eInd].groups.reduce(function (total, id) {
    return total + groups.filter(function (g) {
      return g.id === id;
    })[0].size;
  }, 0);

  return playerCount;
}

module.exports = { countPlayersInEvent: countPlayersInEvent };