date_time.ex
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date_time.ex
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	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.EctoType.ActivityPub.ObjectValidators.DateTime do
	@moduledoc """
	The AP standard defines the date fields in AP as xsd:DateTime. Elixir's
	DateTime can't parse this, but it can parse the related iso8601. This
	module punches the date until it looks like iso8601 and normalizes to
	it.

	DateTimes without a timezone offset are treated as UTC.

	Reference: https://www.w3.org/TR/activitystreams-vocabulary/#dfn-published
	"""
	use Ecto.Type

	def type, do: :string

	def cast(datetime) when is_binary(datetime) do
	with {:ok, datetime, _} <- DateTime.from_iso8601(datetime) do
	{:ok, DateTime.to_iso8601(datetime)}
	else
	{:error, :missing_offset} -> cast("#{datetime}Z")
	_e -> :error
	end
	end

	def cast(_), do: :error

	def dump(data) do
	{:ok, data}
	end

	def load(data) do
	{:ok, data}
	end
	end