function insertUserDataInDb($picture, $artist, $museum, $owner, $keywords, $category_ids)
 {
     $dbInserter = new DbInserter();
     $idFetcher = new DbIdFetcher();
     /********** ARTIST ****************/
     $dbInserter->insertArtistIfDoesNotExists($this->db, $artist);
     $picture->artist_fk = $idFetcher->fetchArtistId($this->db, $artist);
     /********** OWNER ****************/
     $dbInserter->insertOwnerIfDoesNotExists($this->db, $owner);
     $picture->owner_fk = $idFetcher->fetchOwnerId($this->db, $owner);
     /********** MUSEUM ****************/
     if ($museum->isExhibitor) {
         $dbInserter->insertMuseumExhibitsIfNotExists($this->db, $museum);
         $picture->museum_exhibits_fk = $idFetcher->fetchMuseumId($this->db, $museum);
     }
     if ($museum->isOwner) {
         $dbInserter->insertMuseumOwnsIfNotExists($this->db, $museum);
         $picture->museum_owns_fk = $idFetcher->fetchMuseumId($this->db, $museum);
     }
     /********** KEYWORDS ****************/
     $keyword_ids = array();
     foreach ($keywords as $keyword_title) {
         $dbInserter->insertKeyWordIfNotExists($this->db, $keyword_title);
         $keyword_id = $idFetcher->fetchKeywordId($this->db, $keyword_title);
         array_push($keyword_ids, $keyword_id);
     }
     /********** CATEGORIES ****************/
     $dbInserter->insertCategoriesIfNeeded($this->db);
     /********** PICTURE ****************/
     $dbInserter->insertPictureIfNotExists($this->db, $picture);
     $picture->id = $idFetcher->fetchPictureId($this->db, $picture);
     /********** PICTURES_CATEGORIES ****************/
     $dbInserter->insertPictureCategoriesIfNotExists($this->db, $picture->id, $category_ids);
     /********** PICTURES_KEYWORDS ****************/
     $dbInserter->insertPictureKeywordsIfNotExists($this->db, $picture->id, $keyword_ids);
 }
 function compare($db, $picture)
 {
     $inserter = new DbInserter();
     $id = $inserter->insertComparisonPicture($db, $picture);
     $pictures;
     for ($threshold = 10; $threshold <= 90; $threshold = $threshold + 10) {
         $pictures = $this->comparePicture($db, $picture, $id, $threshold);
         if (count($pictures) > 0) {
             break;
         }
     }
     $this->deleteComparisonPictures($db);
     return $pictures;
 }