Made Seeking next/prev Unknown more reliable

An additional search over the image hash is now being performed if the path returned no result.

ArtNet/artnet_manager.py

@@ -262,16 +262,20 @@ class ArtNetManager:
                 break
 
             image_db_result = self.db_connection.get_art_by_path(self.all_images[curr_searched_image_index])
+
             if image_db_result is None:
                 image_db_result = self.db_connection.get_art_by_hash(
                     self.get_md5_of_image(self.all_images[curr_searched_image_index])
                 )
 
             if image_db_result is None:  # image is unknown to database
-                next_unknown = curr_searched_image_index
-                break
-            else:
-                curr_searched_image_index += 1
+                image_db_result = self.db_connection.get_art_by_hash(
+                    self.get_md5_of_image(self.all_images[curr_searched_image_index]))
+                if image_db_result is None:
+                    next_unknown = curr_searched_image_index
+                    break
+
+            curr_searched_image_index += 1
 
         if next_unknown:
             return curr_searched_image_index
@@ -297,10 +301,13 @@ class ArtNetManager:
             image_db_result = self.db_connection.get_art_by_path(self.all_images[curr_searched_image_index])
 
             if image_db_result is None:  # image is unknown to database
-                next_unknown = curr_searched_image_index
-                break
-            else:
-                curr_searched_image_index -= 1
+                image_db_result = self.db_connection.get_art_by_hash(
+                    self.get_md5_of_image(self.all_images[curr_searched_image_index]))
+                if image_db_result is None:
+                    next_unknown = curr_searched_image_index
+                    break
+
+            curr_searched_image_index -= 1
 
         if next_unknown:
             return curr_searched_image_index