function timeSheetEntryFromCustomField(notification)
{
  var notif = new Notification(notification);
  var field = notif.changedCustomField("End Time");
  var end = field.value();
  var start = field.card().customFieldValue("Start Time");

  try
  {
    var hours = createXeroTimesheetEntryViaApi(notif.member().name(),notif.board().name(),start,end);
    //Let the user know it was successful
    notif.replyToMember("thanks, recorded "+hours+" hours");
    //Reset for next timesheet entry
    field.card().setCustomFieldValue("Start Time","").setCustomFieldValue("End Time");
  }

  catch(e)
  {
    notif.replyToMember("Whoa! Something went wrong. Find the nearest IT person and give them this message: "+e);
  }
}

/**
* Gets the email of a team member from their username,
* then posts a timesheet entry for the given client
*/
function createXeroTimesheetEntryViaApi(username,client_name,start,end)
{
  //NEEDS TO BE IMPLEMENTED VIA XERO API
}