Fixed thumbnails ratio. Preparing user preference management

src/file-processor/app/services/user_service.py

@@ -184,3 +184,18 @@ class UserService:
         bool: True if user exists, False otherwise
     """
     return self.user_repository.user_exists(username)
+  
+  def get_preference(self, user_id: str, preference):
+    user = self.get_user_by_id(user_id)
+    if user is None:
+      return None
+    return user.preferences.get(preference, None)
+  
+  def set_preference(self, user_id: str, preference, value):
+    user = self.get_user_by_id(user_id)
+    if user is None:
+      return None
+    
+    user.preferences[preference] = value
+    self.user_repository.update_user(user_id, UserUpdate(preferences=user.preferences))
+    return self.get_user_by_id(user_id)