- reactions = object.data["reactions"] || %{}
- emoji_actors = reactions[emoji] || []
- new_emoji_actors = [actor | emoji_actors] |> Enum.uniq()
- new_reactions = Map.put(reactions, emoji, new_emoji_actors)
- update_element_in_object("reaction", new_reactions, object)
+ reactions = object.data["reactions"] || []
+
+ new_reactions =
+ case Enum.find_index(reactions, fn [candidate, _] -> emoji == candidate end) do
+ nil ->
+ reactions ++ [[emoji, [actor]]]
+
+ index ->
+ List.update_at(
+ reactions,
+ index,
+ fn [emoji, users] -> [emoji, Enum.uniq([actor | users])] end
+ )
+ end
+
+ count = emoji_count(new_reactions)
+
+ update_element_in_object("reaction", new_reactions, object, count)
+ end
+
+ def emoji_count(reactions_list) do
+ Enum.reduce(reactions_list, 0, fn [_, users], acc -> acc + length(users) end)