Couchdb Lucene index function

gistfile1.txt

function(doc) {
  if (!doc.type || doc.type !== 'calendarday') {
    return null;
  }

  var result = new Array(),
    freeTimeFrames = getFreeTimeFrames(doc);

  for (var i = 0; i < freeTimeFrames.length; ++i) {
    var ret = new Document();

    ret.add(doc.org.id, {"field":"location", "store":"yes"});

    for (var j = 0; j < doc.topic.length; ++j) {
      ret.add(doc.topic[j].name, {"field":"topic", "store":"yes"});
    }

    ret.add(freeTimeFrames[i].duration, {"field":"duration", "store":"yes"});
    ret.add(freeTimeFrames[i].dtstart, {"field":"from", "store":"yes"});
    ret.add(freeTimeFrames[i].dtend, {"field":"to", "store":"yes"});
  
    result.push(ret);
  }

  return result;

function getFreeTimeFrames(doc) {
  var sortedEvents = getSortedEvents(doc),
    timeFrames = new Array(),
    day = parseDay(doc._id),
    currentStart = day + "T000000",
    currentEnd = day + "T240000";
    log.info(currentStart);
    log.info(currentEnd);
  for (var i = 0; i < sortedEvents.length; ++i) {
    var event = sortedEvents[i];

    if (event.dtstart > currentStart) {
      timeFrames.push({
        "dtstart": currentStart,
        "dtend": event.dtstart,
        "duration": durationInMin(currentStart, event.dtstart)
      });
    }
    currentStart = event.dtend;
  }
  return timeFrames;
}

function durationInMin(startDate, endDate) {
  // just take hours and minutes (4 characters) from the time of the date (last 6 characters)
  var startTime = startDate.substr(startDate.length - 6,4),
    endTime = endDate.substr(endDate.length - 6,4);

  return timeToMinutes(endTime) - timeToMinutes(startTime);
}

function timeToMinutes(time) {
  return time.substr(0,2) * 60 + time.substr(2,2) * 1;
}

function parseDay(id) {
  var day = id.match(/[0-9]{4}-[0-9]{2}-[0-9]{2}/);
  
  if (day.length > 0) {
    return day[0].replace(/-/g, '');
  }
  
  return null;
}

function getSortedEvents(doc) {
  var events = new Array();
  for (var key in doc.events) {
    events.push(doc.events[key]);
  }
  
  events.sort(sortByDtStart);
  
  return events;
}

function sortByDtStart(a, b) {
  if (a.dtstart < b.dtstart) {
    return -1;
  }
  if  (a.dtstart === b.dtstart) {
    return 0;
  }
  return 1;
}

}