+
+ def bump_or_create(user_id, recipient) do
+ %__MODULE__{}
+ |> creation_cng(%{user_id: user_id, recipient: recipient, unread: 1})
+ |> Repo.insert(
+ on_conflict: [set: [updated_at: NaiveDateTime.utc_now()], inc: [unread: 1]],
+ conflict_target: [:user_id, :recipient]
+ )
+ end
+
+ def mark_as_read(chat) do
+ chat
+ |> change(%{unread: 0})
+ |> Repo.update()
+ end