+
+ def update_last_active_at(%__MODULE__{local: true} = user) do
+ user
+ |> cast(%{last_active_at: NaiveDateTime.utc_now()}, [:last_active_at])
+ |> update_and_set_cache()
+ end
+
+ def active_user_count(weeks \\ 4) do
+ active_after = Timex.shift(NaiveDateTime.utc_now(), weeks: -weeks)
+
+ __MODULE__
+ |> where([u], u.last_active_at >= ^active_after)
+ |> where([u], u.local == true)
+ |> Repo.aggregate(:count)
+ end