+
+ def use_changeset(%Authorization{} = auth, params) do
+ auth
+ |> cast(params, [:used])
+ |> validate_required([:used])
+ end
+
+ def use_token(%Authorization{used: false, valid_until: valid_until} = auth) do
+ if NaiveDateTime.diff(NaiveDateTime.utc_now, valid_until) < 0 do
+ Repo.update(use_changeset(auth, %{used: true}))
+ else
+ {:error, "Token expired"}
+ end
+ end
+ def use_token(%Authorization{used: true}), do: {:error, "Already used"}