93 lines
3 KiB
Elixir
93 lines
3 KiB
Elixir
defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
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alias Pleroma.User
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@behaviour Pleroma.Web.ActivityPub.MRF
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@mrf_policy Application.get_env(:pleroma, :mrf_simple)
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@accept Keyword.get(@mrf_policy, :accept)
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defp check_accept(%{host: actor_host} = actor_info, object)
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when length(@accept) > 0 and not (actor_host in @accept) do
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{:reject, nil}
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end
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defp check_accept(actor_info, object), do: {:ok, object}
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@reject Keyword.get(@mrf_policy, :reject)
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defp check_reject(%{host: actor_host} = actor_info, object) when actor_host in @reject do
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{:reject, nil}
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end
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defp check_reject(actor_info, object), do: {:ok, object}
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@media_removal Keyword.get(@mrf_policy, :media_removal)
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defp check_media_removal(%{host: actor_host} = actor_info, %{"type" => "Create"} = object)
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when actor_host in @media_removal do
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child_object = Map.delete(object["object"], "attachment")
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object = Map.put(object, "object", child_object)
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{:ok, object}
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end
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defp check_media_removal(actor_info, object), do: {:ok, object}
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@media_nsfw Keyword.get(@mrf_policy, :media_nsfw)
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defp check_media_nsfw(
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%{host: actor_host} = actor_info,
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%{
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"type" => "Create",
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"object" => %{"attachment" => child_attachment} = child_object
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} = object
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)
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when actor_host in @media_nsfw and length(child_attachment) > 0 do
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tags = (child_object["tag"] || []) ++ ["nsfw"]
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child_object = Map.put(child_object, "tags", tags)
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child_object = Map.put(child_object, "sensitive", true)
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object = Map.put(object, "object", child_object)
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{:ok, object}
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end
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defp check_media_nsfw(actor_info, object), do: {:ok, object}
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@ftl_removal Keyword.get(@mrf_policy, :federated_timeline_removal)
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defp check_ftl_removal(%{host: actor_host} = actor_info, object)
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when actor_host in @ftl_removal do
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user = User.get_by_ap_id(object["actor"])
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# flip to/cc relationship to make the post unlisted
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object =
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if "https://www.w3.org/ns/activitystreams#Public" in object["to"] and
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user.follower_address in object["cc"] do
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to =
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List.delete(object["to"], "https://www.w3.org/ns/activitystreams#Public") ++
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[user.follower_address]
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cc =
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List.delete(object["cc"], user.follower_address) ++
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["https://www.w3.org/ns/activitystreams#Public"]
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object
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|> Map.put("to", to)
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|> Map.put("cc", cc)
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else
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object
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end
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{:ok, object}
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end
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defp check_ftl_removal(actor_info, object), do: {:ok, object}
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@impl true
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def filter(object) do
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actor_info = URI.parse(object["actor"])
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with {:ok, object} <- check_accept(actor_info, object),
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{:ok, object} <- check_reject(actor_info, object),
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{:ok, object} <- check_media_removal(actor_info, object),
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{:ok, object} <- check_media_nsfw(actor_info, object),
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{:ok, object} <- check_ftl_removal(actor_info, object) do
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{:ok, object}
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else
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_e -> {:reject, nil}
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end
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end
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end
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