feat: use erlang time metadata

Author: chulkilee

lib/metadata_logger.ex

@@ -179,6 +179,7 @@ defmodule MetadataLogger do
   def log_to_map(level, message, ts, metadata) do
     m = Enum.into(metadata, %{})
     {level, m} = Map.pop(m, :erl_level, level)
+    {time, m} = Map.pop(m, :time)
 
     with m <- Map.drop(m, [:error_logger, :mfa, :report_cb]),
          {app, m} <- Map.pop(m, :application),
@@ -211,7 +212,7 @@ defmodule MetadataLogger do
     end
     |> Map.put(:level, level)
     |> Map.put(:message, transform_message(message))
-    |> Map.put(:timestamp, transform_timestamp(ts))
+    |> Map.put(:timestamp, transform_timestamp(time, ts))
   end
 
   defp nil_or_inspect(nil), do: nil
@@ -229,11 +230,15 @@ defmodule MetadataLogger do
   defp transform_message(m) when is_list(m), do: IO.iodata_to_binary(m)
   defp transform_message(m), do: to_string(m)
 
-  defp transform_timestamp({{y, month, d}, {h, minutes, s, mil}}) do
+  defp transform_timestamp(nil, {{y, month, d}, {h, minutes, s, mil}}) do
     {:ok, dt} = NaiveDateTime.new(y, month, d, h, minutes, s, mil)
     dt
   end
 
+  defp transform_timestamp(time_ms, _) do
+    DateTime.from_unix!(time_ms, :microsecond)
+  end
+
   defp scrub(map) do
     map
     |> Map.delete(:function)