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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.Instances do
	@moduledoc "Instances context."

	alias Pleroma.Instances.Instance

	defdelegate filter_reachable(urls_or_hosts), to: Instance

	defdelegate reachable?(url_or_host), to: Instance

	defdelegate set_reachable(url_or_host), to: Instance

	defdelegate set_unreachable(url_or_host, unreachable_since \\ nil), to: Instance

	defdelegate get_consistently_unreachable, to: Instance

	def set_consistently_unreachable(url_or_host),
	do: set_unreachable(url_or_host, reachability_datetime_threshold())

	def reachability_datetime_threshold do
	federation_reachability_timeout_days =
	Pleroma.Config.get([:instance, :federation_reachability_timeout_days], 0)

	if federation_reachability_timeout_days > 0 do
	NaiveDateTime.add(
	NaiveDateTime.utc_now(),
	-federation_reachability_timeout_days * 24 * 3600,
	:second
	)
	else
	~N[0000-01-01 00:00:00]
	end
	end

	def host(url_or_host) when is_binary(url_or_host) do
	if url_or_host =~ ~r/^http/i do
	URI.parse(url_or_host).host
	else
	url_or_host
	end
	end
	end