+ def alias_users(user) do
+ user.also_known_as
+ |> Enum.map(&User.get_cached_by_ap_id/1)
+ |> Enum.filter(fn user -> user != nil end)
+ end
+
+ def add_alias(user, new_alias_user) do
+ current_aliases = user.also_known_as || []
+ new_alias_ap_id = new_alias_user.ap_id
+
+ if new_alias_ap_id in current_aliases do
+ {:ok, user}
+ else
+ user
+ |> cast(%{also_known_as: current_aliases ++ [new_alias_ap_id]}, [:also_known_as])
+ |> update_and_set_cache()
+ end
+ end
+
+ def delete_alias(user, alias_user) do
+ current_aliases = user.also_known_as || []
+ alias_ap_id = alias_user.ap_id
+
+ if alias_ap_id in current_aliases do
+ user
+ |> cast(%{also_known_as: current_aliases -- [alias_ap_id]}, [:also_known_as])
+ |> update_and_set_cache()
+ else
+ {:error, :no_such_alias}
+ end
+ end
+