if($_SESSION['last_directed_edge_request'] < time() - 600) {

  // Get 100 interest recommendations from Directed Edge
  $de = new DirectedEdgeRest();
  $item = "user".$uid;
  $limit = 100;
  $tags = "interest";
  $recommendedInterests = $de->getRecommended($item, $tags, $limit);

  $recommendedInterestsCount = count($recommendedInterests);

  $_SESSION['recommended_interests_count'] = $recommendedInterestsCount;

  if(is_null($recommendedInterests)) {
    $recommendedInterestsCount = 0;
  }

  // Get 100 question recommendations from Directed Edge
  $de = new DirectedEdgeRest();
  $item = "user".$uid;
  $limit = 100;
  $tags = "question";
  $recommendedQuestions = $de->getRecommended($item, $tags, $limit);

  $recommendedQuestionsCount = count($recommendedQuestions);

  $_SESSION['recommended_questions_count'] = $recommendedQuestionsCount;

  if(is_null($recommendedQuestions)) {
    $recommendedQuestionsCount = 0;
  }

  $_SESSION['last_directed_edge_request'] = time();
}

if(isset($_SESSION['recommended_interests_count'])) {
  $recommendedInterestsCount = $_SESSION['recommended_interests_count'];
}

if(isset($_SESSION['recommended_questions_count'])) {
  $recommendedQuestionsCount = $_SESSION['recommended_questions_count'];
}