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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.EctoType.ActivityPub.ObjectValidators.DateTime do
   6   @moduledoc """
   7   The AP standard defines the date fields in AP as xsd:DateTime. Elixir's
   8   DateTime can't parse this, but it can parse the related iso8601. This
   9   module punches the date until it looks like iso8601 and normalizes to
  10   it.
  11
  12   DateTimes without a timezone offset are treated as UTC.
  13
  14   Reference: https://www.w3.org/TR/activitystreams-vocabulary/#dfn-published
  15   """
  16   use Ecto.Type
  17
  18   def type, do: :string
  19
  20   def cast(datetime) when is_binary(datetime) do
  21     with {:ok, datetime, _} <- DateTime.from_iso8601(datetime) do
  22       {:ok, DateTime.to_iso8601(datetime)}
  23     else
  24       {:error, :missing_offset} -> cast("#{datetime}Z")
  25       _e -> :error
  26     end
  27   end
  28
  29   def cast(_), do: :error
  30
  31   def dump(data) do
  32     {:ok, data}
  33   end
  34
  35   def load(data) do
  36     {:ok, data}
  37   end
  38 end