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   1 defmodule Pleroma.Web.ActivityPub.ObjectValidators.Types.DateTime do
   2   @moduledoc """
   3   The AP standard defines the date fields in AP as xsd:DateTime. Elixir's
   4   DateTime can't parse this, but it can parse the related iso8601. This
   5   module punches the date until it looks like iso8601 and normalizes to
   6   it.
   7
   8   DateTimes without a timezone offset are treated as UTC.
   9
  10   Reference: https://www.w3.org/TR/activitystreams-vocabulary/#dfn-published
  11   """
  12   use Ecto.Type
  13
  14   def type, do: :string
  15
  16   def cast(datetime) when is_binary(datetime) do
  17     with {:ok, datetime, _} <- DateTime.from_iso8601(datetime) do
  18       {:ok, DateTime.to_iso8601(datetime)}
  19     else
  20       {:error, :missing_offset} -> cast("#{datetime}Z")
  21       _e -> :error
  22     end
  23   end
  24
  25   def cast(_), do: :error
  26
  27   def dump(data) do
  28     {:ok, data}
  29   end
  30
  31   def load(data) do
  32     {:ok, data}
  33   end
  34 end