/**
  * Display the specified resource.
  *
  * @param  int  $id
  * @return Response
  */
 public function show($id)
 {
     \Session::put('currentSerie', $id);
     $series = loadSerieWithIdOrTitle($id);
     if (empty($series)) {
         flash()->error('That series does not exist.')->important();
         return redirect('series');
     } elseif (count($series) > 1) {
         //special case must be caught where multiple series exist with same title but only 1 serie contains exercises
         // -> redirect immediately
         $break = false;
         $serie = null;
         foreach ($series as $s) {
             $condition = (SerieContainsExercises($s->id) or $s->makerId == Auth::id());
             if ($break and $condition) {
                 return view('series.duplicates', compact('series'));
             } elseif ($condition) {
                 $break = true;
                 $serie = $s;
             }
         }
         $type = loadType2($serie->tId)[0];
         $exercises = loadExercisesFromSerie($serie->id);
         return view('series.show', compact('serie', 'exercises', 'type'));
     } elseif (!SerieContainsExercises($series[0]->id) and !isMakerOfSeries($series[0]->id, Auth::id())) {
         flash()->error('No exercises were found for this series. Come back later...')->important();
         return redirect('series/');
     } else {
         $serie = $series[0];
         $type = loadType2($serie->tId)[0];
         $exercises = loadExercisesFromSerie($serie->id);
         return view('series.show', compact('serie', 'exercises', 'type'));
     }
 }
function returnAccomplishedPercentageSeries($user, $serie)
{
    $allExercises = loadExercisesFromSerie($serie->id);
    $totalExercises = count($allExercises);
    $count = 0;
    foreach ($allExercises as $exercise) {
        if (userCompletedExercise($exercise->id, $user->id)) {
            $count += 1;
        }
    }
    return $totalExercises == 0 ? 0 : 100 * $count / $totalExercises;
    //result in percentage
}