Merge pull request #582 from Kraigie/jb3/fix-statem-datetime-error

Fix the error caused by trying to cast a datetime to datetime

lib/nostrum/util.ex

@@ -209,13 +209,19 @@ defmodule Nostrum.Util do
   end
 
   @doc """
-  Converts possibly nil ISO8601 timestamp to a `DateTime`
+  Converts possibly nil ISO8601 timestamp to a `DateTime`.
+
+  If a `DateTime` is provided, return it as-is.
   """
-  @spec maybe_to_datetime(String.t() | nil) :: DateTime.t() | nil
+  @spec maybe_to_datetime(String.t() | nil | DateTime.t()) :: DateTime.t() | nil
   def maybe_to_datetime(nil) do
     nil
   end
 
+  def maybe_to_datetime(%DateTime{} = dt) do
+    dt
+  end
+
   def maybe_to_datetime(stamp) do
     {:ok, casted, 0} = DateTime.from_iso8601(stamp)
     casted