public function update()
 {
     $this->LogInfo("Start");
     $u = new UserHelper();
     $directories = Config::get('folders_to_scan_for_files');
     foreach ($directories as $directory) {
         $users = $u->findUsersInDatabaseInDirectoryOnDisk($directory);
         $this->validateUsersInDirectory($users);
     }
     $this->LogInfo("Affiliation was set for " . $this->numberOfUsersInserted . " users");
 }
 public function update()
 {
     $this->LogInfo("Start");
     $math = new Arithmetic();
     $aggregatedSize = 0.0;
     $u = new UserHelper();
     $directories = Config::get('folders_to_scan_for_files');
     foreach ($directories as $directory) {
         if (is_dir($directory)) {
             $users = $u->findUsersInDatabaseInDirectoryOnDisk($directory);
             foreach ($users as $feideUsername => $arrayOfPossibleUsernamesForAUser) {
                 $criteria = array(UserDiskUsageSchema::USERNAME => $feideUsername);
                 $userDiskusageDocument = $this->userDiskUsageCollection->findOne($criteria);
                 $diskSize = 0.0;
                 foreach ($arrayOfPossibleUsernamesForAUser as $usernameAndDir) {
                     if (is_dir($usernameAndDir)) {
                         $diskSize = $math->add($diskSize, $this->_calculateSize($usernameAndDir));
                     }
                 }
                 $dbSize = $this->_producedMoreSinceLastSave($feideUsername);
                 if ($this->_userExistsInCollection($userDiskusageDocument)) {
                     if (!$math->consideredToBeEqual($dbSize, $diskSize)) {
                         $storage = array(UserDiskUsageSchema::DATE => new Mongodate(), UserDiskUsageSchema::SIZE => $diskSize);
                         $operationOK = $this->_updateDocumentInCollection($criteria, $storage);
                     } else {
                         continue;
                     }
                 } else {
                     $userDocument = $this->userCollection->findOne($criteria);
                     $org = $userDocument[UsersSchema::ORG];
                     $newUser = $this->_createUser($feideUsername, $diskSize, $org);
                     $operationOK = $this->_insertDocumentToMongoDatabase($newUser);
                 }
                 if ($operationOK) {
                     $this->LogInfo("Aggregated " . $feideUsername . " (" . $math->subtract($diskSize, $dbSize) . "MiB diff). Last size was " . $dbSize . "MiB");
                     $this->numberInserted = $this->numberInserted + 1;
                     $aggregatedSize = $math->add($aggregatedSize, $diskSize);
                 } else {
                     $this->LogError("Could not update " . $feideUsername . var_dump($criteria));
                 }
             }
         }
     }
     $this->LogInfo("Aggregated " . $aggregatedSize . "MiB for {$this->numberInserted} users ");
 }