Make MRF Keyword history-aware

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Tusooa Zhu 2022-07-23 15:56:36 -04:00
parent 04ded94a50
commit eba9b0760f
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GPG key ID: 7B467EDE43A08224
4 changed files with 231 additions and 12 deletions

View file

@ -197,4 +197,44 @@ defmodule Pleroma.Object.Updater do
used_history_in_new_object?: used_history_in_new_object?
}
end
defp for_each_history_item(%{"orderedItems" => items} = history, _object, fun) do
new_items =
Enum.map(items, fun)
|> Enum.reduce_while(
{:ok, []},
fn
{:ok, item}, {:ok, acc} -> {:cont, {:ok, acc ++ [item]}}
e, _acc -> {:halt, e}
end
)
case new_items do
{:ok, items} -> {:ok, Map.put(history, "orderedItems", items)}
e -> e
end
end
defp for_each_history_item(history, _, _) do
{:ok, history}
end
def do_with_history(object, fun) do
with history <- object["formerRepresentations"],
object <- Map.drop(object, ["formerRepresentations"]),
{_, {:ok, object}} <- {:main_body, fun.(object)},
{_, {:ok, history}} <- {:history_items, for_each_history_item(history, object, fun)} do
object =
if history do
Map.put(object, "formerRepresentations", history)
else
object
end
{:ok, object}
else
{:main_body, e} -> e
{:history_items, e} -> e
end
end
end

View file

@ -27,24 +27,46 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicy do
end
defp check_reject(%{"object" => %{} = object} = message) do
payload = object_payload(object)
with {:ok, _new_object} <-
Pleroma.Object.Updater.do_with_history(object, fn object ->
payload = object_payload(object)
if Enum.any?(Pleroma.Config.get([:mrf_keyword, :reject]), fn pattern ->
string_matches?(payload, pattern)
end) do
{:reject, "[KeywordPolicy] Matches with rejected keyword"}
else
if Enum.any?(Pleroma.Config.get([:mrf_keyword, :reject]), fn pattern ->
string_matches?(payload, pattern)
end) do
{:reject, "[KeywordPolicy] Matches with rejected keyword"}
else
{:ok, message}
end
end) do
{:ok, message}
else
e -> e
end
end
defp check_ftl_removal(%{"to" => to, "object" => %{} = object} = message) do
payload = object_payload(object)
defp check_ftl_removal(%{"type" => "Create", "to" => to, "object" => %{} = object} = message) do
check_keyword = fn object ->
payload = object_payload(object)
if Pleroma.Constants.as_public() in to and
Enum.any?(Pleroma.Config.get([:mrf_keyword, :federated_timeline_removal]), fn pattern ->
if Enum.any?(Pleroma.Config.get([:mrf_keyword, :federated_timeline_removal]), fn pattern ->
string_matches?(payload, pattern)
end) do
{:should_delist, nil}
else
{:ok, %{}}
end
end
should_delist? = fn object ->
with {:ok, _} <- Pleroma.Object.Updater.do_with_history(object, check_keyword) do
false
else
_ -> true
end
end
if Pleroma.Constants.as_public() in to and should_delist?.(object) do
to = List.delete(to, Pleroma.Constants.as_public())
cc = [Pleroma.Constants.as_public() | message["cc"] || []]
@ -59,8 +81,12 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicy do
end
end
defp check_ftl_removal(message) do
{:ok, message}
end
defp check_replace(%{"object" => %{} = object} = message) do
object =
replace_kw = fn object ->
["content", "name", "summary"]
|> Enum.filter(fn field -> Map.has_key?(object, field) && object[field] end)
|> Enum.reduce(object, fn field, object ->
@ -73,6 +99,10 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicy do
Map.put(object, field, data)
end)
|> (fn object -> {:ok, object} end).()
end
{:ok, object} = Pleroma.Object.Updater.do_with_history(object, replace_kw)
message = Map.put(message, "object", object)
@ -80,7 +110,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicy do
end
@impl true
def filter(%{"type" => "Create", "object" => %{"content" => _content}} = message) do
def filter(%{"type" => type, "object" => %{"content" => _content}} = message)
when type in ["Create", "Update"] do
with {:ok, message} <- check_reject(message),
{:ok, message} <- check_ftl_removal(message),
{:ok, message} <- check_replace(message) do

View file

@ -79,6 +79,54 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicyTest do
KeywordPolicy.filter(message)
end)
end
test "rejects if string matches in history" do
clear_config([:mrf_keyword, :reject], ["pun"])
message = %{
"type" => "Create",
"object" => %{
"content" => "just a daily reminder that compLAINer is a good",
"summary" => "",
"formerRepresentations" => %{
"type" => "OrderedCollection",
"orderedItems" => [
%{
"content" => "just a daily reminder that compLAINer is a good pun",
"summary" => ""
}
]
}
}
}
assert {:reject, "[KeywordPolicy] Matches with rejected keyword"} =
KeywordPolicy.filter(message)
end
test "rejects Updates" do
clear_config([:mrf_keyword, :reject], ["pun"])
message = %{
"type" => "Update",
"object" => %{
"content" => "just a daily reminder that compLAINer is a good",
"summary" => "",
"formerRepresentations" => %{
"type" => "OrderedCollection",
"orderedItems" => [
%{
"content" => "just a daily reminder that compLAINer is a good pun",
"summary" => ""
}
]
}
}
}
assert {:reject, "[KeywordPolicy] Matches with rejected keyword"} =
KeywordPolicy.filter(message)
end
end
describe "delisting from ftl based on keywords" do
@ -157,6 +205,31 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicyTest do
not (["https://www.w3.org/ns/activitystreams#Public"] == result["to"])
end)
end
test "delists if string matches in history" do
clear_config([:mrf_keyword, :federated_timeline_removal], ["pun"])
message = %{
"to" => ["https://www.w3.org/ns/activitystreams#Public"],
"type" => "Create",
"object" => %{
"content" => "just a daily reminder that compLAINer is a good",
"summary" => "",
"formerRepresentations" => %{
"orderedItems" => [
%{
"content" => "just a daily reminder that compLAINer is a good pun",
"summary" => ""
}
]
}
}
}
{:ok, result} = KeywordPolicy.filter(message)
assert ["https://www.w3.org/ns/activitystreams#Public"] == result["cc"]
refute ["https://www.w3.org/ns/activitystreams#Public"] == result["to"]
end
end
describe "replacing keywords" do
@ -221,5 +294,63 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicyTest do
result == "ZFS is free software"
end)
end
test "replaces keyword if string matches in history" do
clear_config([:mrf_keyword, :replace], [{"opensource", "free software"}])
message = %{
"type" => "Create",
"to" => ["https://www.w3.org/ns/activitystreams#Public"],
"object" => %{
"content" => "ZFS is opensource",
"summary" => "",
"formerRepresentations" => %{
"type" => "OrderedCollection",
"orderedItems" => [
%{"content" => "ZFS is opensource mew mew", "summary" => ""}
]
}
}
}
{:ok,
%{
"object" => %{
"content" => "ZFS is free software",
"formerRepresentations" => %{
"orderedItems" => [%{"content" => "ZFS is free software mew mew"}]
}
}
}} = KeywordPolicy.filter(message)
end
test "replaces keyword in Updates" do
clear_config([:mrf_keyword, :replace], [{"opensource", "free software"}])
message = %{
"type" => "Update",
"to" => ["https://www.w3.org/ns/activitystreams#Public"],
"object" => %{
"content" => "ZFS is opensource",
"summary" => "",
"formerRepresentations" => %{
"type" => "OrderedCollection",
"orderedItems" => [
%{"content" => "ZFS is opensource mew mew", "summary" => ""}
]
}
}
}
{:ok,
%{
"object" => %{
"content" => "ZFS is free software",
"formerRepresentations" => %{
"orderedItems" => [%{"content" => "ZFS is free software mew mew"}]
}
}
}} = KeywordPolicy.filter(message)
end
end
end

View file

@ -1647,5 +1647,22 @@ defmodule Pleroma.Web.CommonAPITest do
assert edited_note.data["emoji"]["remoteemoji"] == remote_emoji_uri
end
test "respects MRF" do
user = insert(:user)
clear_config([:mrf, :policies], [Pleroma.Web.ActivityPub.MRF.KeywordPolicy])
clear_config([:mrf_keyword, :replace], [{"updated", "mewmew"}])
{:ok, activity} = CommonAPI.post(user, %{status: "foo1", spoiler_text: "updated 1"})
assert Object.normalize(activity).data["summary"] == "mewmew 1"
{:ok, updated} = CommonAPI.update(user, activity, %{status: "updated 2"})
updated_object = Object.normalize(updated)
assert updated_object.data["content"] == "mewmew 2"
assert Map.get(updated_object.data, "summary", "") == ""
assert Map.has_key?(updated_object.data, "updated")
end
end
end