EmojiPolicy: Implement delist
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@ -5,6 +5,8 @@
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defmodule Pleroma.Web.ActivityPub.MRF.EmojiPolicy do
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require Pleroma.Constants
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alias Pleroma.Object.Updater
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@moduledoc "Reject or force-unlisted emojis with certain URLs or names"
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@behaviour Pleroma.Web.ActivityPub.MRF.Policy
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@ -17,12 +19,31 @@ defmodule Pleroma.Web.ActivityPub.MRF.EmojiPolicy do
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Pleroma.Config.get([:mrf_emoji, :remove_shortcode], [])
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end
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defp config_unlist_url do
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Pleroma.Config.get([:mrf_emoji, :federated_timeline_removal_url], [])
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end
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defp config_unlist_shortcode do
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Pleroma.Config.get([:mrf_emoji, :federated_timeline_removal_shortcode], [])
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end
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@impl Pleroma.Web.ActivityPub.MRF.Policy
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def history_awareness, do: :manual
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@impl Pleroma.Web.ActivityPub.MRF.Policy
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def filter(%{"type" => type, "object" => %{} = object} = message)
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when type in ["Create", "Update"] do
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with object <- process_remove(object, :url, config_remove_url()),
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object <- process_remove(object, :shortcode, config_remove_shortcode()) do
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{:ok, Map.put(message, "object", object)}
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with {:ok, object} <-
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Updater.do_with_history(object, fn object ->
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{:ok, process_remove(object, :url, config_remove_url())}
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end),
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{:ok, object} <-
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Updater.do_with_history(object, fn object ->
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{:ok, process_remove(object, :shortcode, config_remove_shortcode())}
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end),
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activity <- Map.put(message, "object", object),
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activity <- maybe_delist(activity) do
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{:ok, activity}
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end
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end
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@ -51,28 +72,22 @@ defmodule Pleroma.Web.ActivityPub.MRF.EmojiPolicy do
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Enum.any?(patterns, &match_string?(string, &1))
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end
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defp url_from_tag(%{"icon" => %{"url" => url}}), do: url
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defp url_from_tag(_), do: nil
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defp url_from_emoji({_name, url}), do: url
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defp shortcode_from_tag(%{"name" => name}) when is_binary(name), do: String.trim(name, ":")
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defp shortcode_from_tag(_), do: nil
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defp shortcode_from_emoji({name, _url}), do: name
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defp process_remove(object, :url, patterns) do
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process_remove_impl(
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object,
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fn
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%{"icon" => %{"url" => url}} -> url
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_ -> nil
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end,
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fn {_name, url} -> url end,
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patterns
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)
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process_remove_impl(object, &url_from_tag/1, &url_from_emoji/1, patterns)
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end
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defp process_remove(object, :shortcode, patterns) do
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process_remove_impl(
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object,
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fn
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%{"name" => name} when is_binary(name) -> String.trim(name, ":")
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_ -> nil
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end,
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fn {name, _url} -> name end,
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patterns
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)
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process_remove_impl(object, &shortcode_from_tag/1, &shortcode_from_emoji/1, patterns)
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end
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defp process_remove_impl(object, extract_from_tag, extract_from_emoji, patterns) do
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@ -118,6 +133,66 @@ defmodule Pleroma.Web.ActivityPub.MRF.EmojiPolicy do
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end
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end
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defp maybe_delist(%{"object" => object, "to" => to, "type" => "Create"} = activity) do
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check = fn object ->
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if any_emoji_match?(object, &url_from_tag/1, &url_from_emoji/1, config_unlist_url()) or
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any_emoji_match?(
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object,
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&shortcode_from_tag/1,
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&shortcode_from_emoji/1,
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config_unlist_shortcode()
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) do
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{:should_delist, nil}
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else
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{:ok, %{}}
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end
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end
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should_delist? = fn object ->
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with {:ok, _} <- Pleroma.Object.Updater.do_with_history(object, check) do
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false
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else
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_ -> true
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end
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end
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if Pleroma.Constants.as_public() in to and should_delist?.(object) do
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to = List.delete(to, Pleroma.Constants.as_public())
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cc = [Pleroma.Constants.as_public() | activity["cc"] || []]
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activity
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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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activity
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end
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end
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defp maybe_delist(activity), do: activity
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defp any_emoji_match?(object, extract_from_tag, extract_from_emoji, patterns) do
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Kernel.||(
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Enum.any?(
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object["tag"],
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fn
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%{"type" => "Emoji"} = tag ->
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str = extract_from_tag.(tag)
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if is_binary(str) do
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match_any?(str, patterns)
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else
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false
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end
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_ ->
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false
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end
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),
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object["emoji"]
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|> Enum.any?(fn emoji -> match_any?(extract_from_emoji.(emoji), patterns) end)
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)
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end
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@impl Pleroma.Web.ActivityPub.MRF.Policy
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def describe do
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# This horror is needed to convert regex sigils to strings
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@ -5,6 +5,8 @@
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defmodule Pleroma.Web.ActivityPub.MRF.EmojiPolicyTest do
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use Pleroma.DataCase
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require Pleroma.Constants
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alias Pleroma.Web.ActivityPub.MRF
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alias Pleroma.Web.ActivityPub.MRF.EmojiPolicy
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@ -84,8 +86,27 @@ defmodule Pleroma.Web.ActivityPub.MRF.EmojiPolicyTest do
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"nekomimi_girl_emoji_007" =>
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"https://example.org/emoji/nekomimi_girl_emoji/nekomimi_girl_emoji_007.png",
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"test" => "https://example.org/test.png"
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}
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}
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},
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"to" => ["https://example.org/self", Pleroma.Constants.as_public()],
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"cc" => ["https://example.org/someone"]
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},
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"to" => ["https://example.org/self", Pleroma.Constants.as_public()],
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"cc" => ["https://example.org/someone"]
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}
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@status_data_with_history %{
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"type" => "Create",
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"object" =>
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@status_data["object"]
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|> Map.merge(%{
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"formerRepresentations" => %{
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"type" => "OrderedCollection",
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"orderedItems" => [@status_data["object"] |> Map.put("content", "older")],
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"totalItems" => 1
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}
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}),
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"to" => ["https://example.org/self", Pleroma.Constants.as_public()],
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"cc" => ["https://example.org/someone"]
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}
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describe "remove_url" do
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@ -119,6 +140,49 @@ defmodule Pleroma.Web.ActivityPub.MRF.EmojiPolicyTest do
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assert %{"object" => %{"tag" => ^expected_tags, "emoji" => ^expected_emoji}} = filtered
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end
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test "processes status with history" do
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{:ok, filtered} = MRF.filter_one(EmojiPolicy, @status_data_with_history)
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expected_tags = [@emoji_tags |> Enum.at(2)] ++ @misc_tags
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expected_emoji = %{
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"nekomimi_girl_emoji_007" =>
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"https://example.org/emoji/nekomimi_girl_emoji/nekomimi_girl_emoji_007.png"
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}
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assert %{
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"object" => %{
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"tag" => ^expected_tags,
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"emoji" => ^expected_emoji,
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"formerRepresentations" => %{"orderedItems" => [item]}
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}
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} = filtered
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assert %{"tag" => ^expected_tags, "emoji" => ^expected_emoji} = item
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end
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test "processes updates" do
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{:ok, filtered} =
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MRF.filter_one(EmojiPolicy, @status_data_with_history |> Map.put("type", "Update"))
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expected_tags = [@emoji_tags |> Enum.at(2)] ++ @misc_tags
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expected_emoji = %{
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"nekomimi_girl_emoji_007" =>
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"https://example.org/emoji/nekomimi_girl_emoji/nekomimi_girl_emoji_007.png"
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}
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assert %{
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"object" => %{
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"tag" => ^expected_tags,
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"emoji" => ^expected_emoji,
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"formerRepresentations" => %{"orderedItems" => [item]}
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}
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} = filtered
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assert %{"tag" => ^expected_tags, "emoji" => ^expected_emoji} = item
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end
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end
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describe "remove_shortcode" do
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@ -152,5 +216,117 @@ defmodule Pleroma.Web.ActivityPub.MRF.EmojiPolicyTest do
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assert %{"object" => %{"tag" => ^expected_tags, "emoji" => ^expected_emoji}} = filtered
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end
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test "processes status with history" do
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{:ok, filtered} = MRF.filter_one(EmojiPolicy, @status_data_with_history)
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expected_tags = [@emoji_tags |> Enum.at(2)] ++ @misc_tags
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expected_emoji = %{
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"nekomimi_girl_emoji_007" =>
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"https://example.org/emoji/nekomimi_girl_emoji/nekomimi_girl_emoji_007.png"
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}
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assert %{
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"object" => %{
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"tag" => ^expected_tags,
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"emoji" => ^expected_emoji,
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"formerRepresentations" => %{"orderedItems" => [item]}
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}
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} = filtered
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assert %{"tag" => ^expected_tags, "emoji" => ^expected_emoji} = item
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end
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test "processes updates" do
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{:ok, filtered} =
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MRF.filter_one(EmojiPolicy, @status_data_with_history |> Map.put("type", "Update"))
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expected_tags = [@emoji_tags |> Enum.at(2)] ++ @misc_tags
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expected_emoji = %{
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"nekomimi_girl_emoji_007" =>
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"https://example.org/emoji/nekomimi_girl_emoji/nekomimi_girl_emoji_007.png"
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}
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assert %{
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"object" => %{
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"tag" => ^expected_tags,
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"emoji" => ^expected_emoji,
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"formerRepresentations" => %{"orderedItems" => [item]}
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}
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} = filtered
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assert %{"tag" => ^expected_tags, "emoji" => ^expected_emoji} = item
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end
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end
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describe "federated_timeline_removal_url" do
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setup do
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clear_config([:mrf_emoji, :federated_timeline_removal_url], [
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"https://example.org/test.png",
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~r{/biribiri/mikoto_smile[23]\.png},
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"nekomimi_girl_emoji"
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])
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:ok
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end
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test "processes status" do
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{:ok, filtered} = MRF.filter_one(EmojiPolicy, @status_data)
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expected_tags = @status_data["object"]["tag"]
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expected_emoji = @status_data["object"]["emoji"]
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expected_to = ["https://example.org/self"]
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expected_cc = [Pleroma.Constants.as_public(), "https://example.org/someone"]
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assert %{
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"to" => ^expected_to,
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"cc" => ^expected_cc,
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"object" => %{"tag" => ^expected_tags, "emoji" => ^expected_emoji}
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} = filtered
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end
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test "ignore updates" do
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{:ok, filtered} = MRF.filter_one(EmojiPolicy, @status_data |> Map.put("type", "Update"))
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expected_tags = @status_data["object"]["tag"]
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expected_emoji = @status_data["object"]["emoji"]
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expected_to = ["https://example.org/self", Pleroma.Constants.as_public()]
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expected_cc = ["https://example.org/someone"]
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assert %{
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"to" => ^expected_to,
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"cc" => ^expected_cc,
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"object" => %{"tag" => ^expected_tags, "emoji" => ^expected_emoji}
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} = filtered
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end
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test "processes status with history" do
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status =
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@status_data_with_history
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|> put_in(["object", "tag"], @misc_tags)
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|> put_in(["object", "emoji"], %{})
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{:ok, filtered} = MRF.filter_one(EmojiPolicy, status)
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expected_tags = @status_data["object"]["tag"]
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expected_emoji = @status_data["object"]["emoji"]
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expected_to = ["https://example.org/self"]
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expected_cc = [Pleroma.Constants.as_public(), "https://example.org/someone"]
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assert %{
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"to" => ^expected_to,
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"cc" => ^expected_cc,
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"object" => %{
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"formerRepresentations" => %{
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"orderedItems" => [%{"tag" => ^expected_tags, "emoji" => ^expected_emoji}]
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}
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}
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} = filtered
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end
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end
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end
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