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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Instances do
   6   @moduledoc "Instances context."
   7
   8   alias Pleroma.Instances.Instance
   9
  10   def filter_reachable(urls_or_hosts), do: Instance.filter_reachable(urls_or_hosts)
  11
  12   def reachable?(url_or_host), do: Instance.reachable?(url_or_host)
  13
  14   def set_reachable(url_or_host), do: Instance.set_reachable(url_or_host)
  15
  16   def set_unreachable(url_or_host, unreachable_since \\ nil),
  17     do: Instance.set_unreachable(url_or_host, unreachable_since)
  18
  19   def get_consistently_unreachable, do: Instance.get_consistently_unreachable()
  20
  21   def set_consistently_unreachable(url_or_host),
  22     do: set_unreachable(url_or_host, reachability_datetime_threshold())
  23
  24   def reachability_datetime_threshold do
  25     federation_reachability_timeout_days =
  26       Pleroma.Config.get([:instance, :federation_reachability_timeout_days], 0)
  27
  28     if federation_reachability_timeout_days > 0 do
  29       NaiveDateTime.add(
  30         NaiveDateTime.utc_now(),
  31         -federation_reachability_timeout_days * 24 * 3600,
  32         :second
  33       )
  34     else
  35       ~N[0000-01-01 00:00:00]
  36     end
  37   end
  38
  39   def host(url_or_host) when is_binary(url_or_host) do
  40     if url_or_host =~ ~r/^http/i do
  41       URI.parse(url_or_host).host
  42     else
  43       url_or_host
  44     end
  45   end
  46 end