val history = reportService.history()
for {
  h <- history
  grouped = Future.sequence(h.groupBy(_._1).collect {
    case (id, _) => reportService.find(id).filter(_.isDefined).map(r => (id, r.get))
  })
  reportList <- grouped
  reports = reportList.toMap
  resolved = h.collect {
    case (id, commit) if reports.contains(id) => (reports(id), commit)
  }
} yield Ok(views.html.index(resolved))