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Add ForceMentionsInContentPolicy

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Even though latest PleromaFE supports displaying these properly, mobile
apps still exist, so I think we should offer a workaround to those who
want it.
This commit is contained in:
rinpatch 2022-01-19 19:40:50 +03:00
parent 70fbd1f09e
commit a02cfd7f52
7 changed files with 221 additions and 20 deletions
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1
CHANGELOG.md
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@ -16,6 +16,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
### Added
- `activeMonth` and `activeHalfyear` fields in NodeInfo usage.users object
- Experimental support for Finch. Put `config :tesla, :adapter, {Tesla.Adapter.Finch, name: MyFinch}` in your secrets file to use it. Reverse Proxy will still use Hackney.
- `ForceMentionsInPostContent` MRF policy
- AdminAPI: allow moderators to manage reports, users, invites, and custom emojis
- AdminAPI: restrict moderators to access sensitive data: change user credentials, get password reset token, read private statuses and chats, etc
- PleromaAPI: Add remote follow API endpoint at `POST /api/v1/pleroma/remote_interaction`

1
docs/configuration/cheatsheet.md
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@ -126,6 +126,7 @@ To add configuration to your config file, you can copy it from the base config.
* `Pleroma.Web.ActivityPub.MRF.ForceBotUnlistedPolicy`: Makes all bot posts to disappear from public timelines.
* `Pleroma.Web.ActivityPub.MRF.FollowBotPolicy`: Automatically follows newly discovered users from the specified bot account. Local accounts, locked accounts, and users with "#nobot" in their bio are respected and excluded from being followed.
* `Pleroma.Web.ActivityPub.MRF.KeywordPolicy`: Rejects or removes from the federated timeline or replaces keywords. (See [`:mrf_keyword`](#mrf_keyword)).
* `Pleroma.Web.ActivityPub.MRF.ForceMentionsInContent`: Forces every mentioned user to be reflected in the post content.
* `transparency`: Make the content of your Message Rewrite Facility settings public (via nodeinfo).
* `transparency_exclusions`: Exclude specific instance names from MRF transparency. The use of the exclusions feature will be disclosed in nodeinfo as a boolean value.

42
lib/pleroma/formatter.ex
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@ -34,32 +34,34 @@ defmodule Pleroma.Formatter do
def mention_handler("@" <> nickname, buffer, opts, acc) do
case User.get_cached_by_nickname(nickname) do
%User{id: id} = user ->
user_url = user.uri || user.ap_id
nickname_text = get_nickname_text(nickname, opts)
link =
Phoenix.HTML.Tag.content_tag(
:span,
Phoenix.HTML.Tag.content_tag(
:a,
["@", Phoenix.HTML.Tag.content_tag(:span, nickname_text)],
"data-user": id,
class: "u-url mention",
href: user_url,
rel: "ugc"
),
class: "h-card"
)
|> Phoenix.HTML.safe_to_string()
{link, %{acc | mentions: MapSet.put(acc.mentions, {"@" <> nickname, user})}}
%User{} = user ->
{mention_from_user(user, opts),
%{acc | mentions: MapSet.put(acc.mentions, {"@" <> nickname, user})}}
_ ->
{buffer, acc}
end
end
def mention_from_user(%User{id: id} = user, opts \\ %{mentions_format: :full}) do
user_url = user.uri || user.ap_id
nickname_text = get_nickname_text(user.nickname, opts)
Phoenix.HTML.Tag.content_tag(
:span,
Phoenix.HTML.Tag.content_tag(
:a,
["@", Phoenix.HTML.Tag.content_tag(:span, nickname_text)],
"data-user": id,
class: "u-url mention",
href: user_url,
rel: "ugc"
),
class: "h-card"
)
|> Phoenix.HTML.safe_to_string()
end
def hashtag_handler("#" <> tag = tag_text, _buffer, _opts, acc) do
tag = String.downcase(tag)
url = "#{Pleroma.Web.Endpoint.url()}/tag/#{tag}"

4
lib/pleroma/user.ex
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@ -1055,6 +1055,10 @@ defmodule Pleroma.User do
Repo.get_by(User, ap_id: ap_id)
end
def get_by_uri(uri) do
Repo.get_by(User, uri: uri)
end
def get_all_by_ap_id(ap_ids) do
from(u in __MODULE__,
where: u.ap_id in ^ap_ids

80
lib/pleroma/web/activity_pub/mrf/force_mentions_in_content.ex Normal file
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@ -0,0 +1,80 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.ForceMentionsInContent do
alias Pleroma.Formatter
alias Pleroma.User
@behaviour Pleroma.Web.ActivityPub.MRF.Policy
defp do_extract({:a, attrs, _}, acc) do
if Enum.find(attrs, fn {name, value} ->
name == "class" && value in ["mention", "u-url mention", "mention u-url"]
end) do
href = Enum.find(attrs, fn {name, _} -> name == "href" end) |> elem(1)
acc ++ [href]
else
acc
end
end
defp do_extract({_, _, children}, acc) do
do_extract(children, acc)
end
defp do_extract(nodes, acc) when is_list(nodes) do
Enum.reduce(nodes, acc, fn node, acc -> do_extract(node, acc) end)
end
defp do_extract(_, acc), do: acc
defp extract_mention_uris_from_content(content) do
{:ok, tree} = :fast_html.decode(content, format: [:html_atoms])
do_extract(tree, [])
end
@impl true
def filter(%{"type" => "Create", "object" => %{"type" => "Note", "tag" => tag}} = object) do
# image-only posts from pleroma apparently reach this MRF without the content field
content = object["object"]["content"] || ""
mention_users =
tag
|> Enum.filter(fn tag -> tag["type"] == "Mention" end)
|> Enum.map(& &1["href"])
|> Enum.reject(&is_nil/1)
|> Enum.map(fn ap_id_or_uri ->
case User.get_or_fetch_by_ap_id(ap_id_or_uri) do
{:ok, user} -> {ap_id_or_uri, user}
_ -> {ap_id_or_uri, User.get_by_uri(ap_id_or_uri)}
end
end)
|> Enum.reject(fn {_, user} -> user == nil end)
|> Enum.into(%{})
explicitly_mentioned_uris = extract_mention_uris_from_content(content)
added_mentions =
Enum.reduce(mention_users, "", fn {uri, user}, acc ->
unless uri in explicitly_mentioned_uris do
acc <> Formatter.mention_from_user(user)
else
acc
end
end)
content =
if added_mentions != "",
do: added_mentions <> " " <> content,
else: content
{:ok, put_in(object["object"]["content"], content)}
end
@impl true
def filter(object), do: {:ok, object}
@impl true
def describe, do: {:ok, %{}}
end

79
test/fixtures/soapbox_no_mentions_in_content.json vendored Normal file
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@ -0,0 +1,79 @@
{
"@context": [
"https://www.w3.org/ns/activitystreams",
"https://gleasonator.com/schemas/litepub-0.1.jsonld",
{
"@language": "und"
}
],
"actor": "https://gleasonator.com/users/alex",
"attachment": [
{
"blurhash": "b15#-6_3~l%eDkNraAM#HYMf",
"height": 2147,
"mediaType": "image/png",
"name": "",
"type": "Document",
"url": "https://media.gleasonator.com/2df1c9cc26c35028db65848143971da0c5a6e04dbd423b194bb018b6c601db9b.png",
"width": 966
},
{
"blurhash": "b168EX~q~W-;DiM{VtIUD%Io",
"height": 2147,
"mediaType": "image/png",
"name": "",
"type": "Document",
"url": "https://media.gleasonator.com/22b42b4cddc1aecc7e2d3dc20bcdd66d5c4e44c2bef119de948e95a587e36b66.png",
"width": 966
}
],
"attributedTo": "https://gleasonator.com/users/alex",
"cc": [
"https://www.w3.org/ns/activitystreams#Public"
],
"content": "<p>Haha yeah, you can control who you reply to.</p>",
"context": "https://gleasonator.com/contexts/ba6c8bd9-ac4d-479e-9bd9-5bf570068ae7",
"conversation": "https://gleasonator.com/contexts/ba6c8bd9-ac4d-479e-9bd9-5bf570068ae7",
"id": "https://gleasonator.com/objects/02af65fe-04f8-46bc-9b1e-31dfe76eaffd",
"inReplyTo": "https://shitposter.club/objects/c686d811-4368-48e1-ba11-82c129f93165",
"published": "2022-01-19T03:37:35.976545Z",
"sensitive": false,
"source": "Haha yeah, you can control who you reply to.",
"summary": "",
"tag": [
{
"href": "https://lain.com/users/lain",
"name": "@lain@lain.com",
"type": "Mention"
},
{
"href": "https://shitposter.club/users/coolboymew",
"name": "@coolboymew@shitposter.club",
"type": "Mention"
},
{
"href": "https://shitposter.club/users/dielan",
"name": "@dielan@shitposter.club",
"type": "Mention"
},
{
"href": "https://tuusin.misono-ya.info/users/hakui",
"name": "@hakui@tuusin.misono-ya.info",
"type": "Mention"
},
{
"href": "https://xyzzy.link/users/fence",
"name": "@fence@xyzzy.link",
"type": "Mention"
}
],
"to": [
"https://shitposter.club/users/dielan",
"https://gleasonator.com/users/alex/followers",
"https://shitposter.club/users/coolboymew",
"https://xyzzy.link/users/fence",
"https://tuusin.misono-ya.info/users/hakui",
"https://lain.com/users/lain"
],
"type": "Note"
}

34
test/pleroma/web/activity_pub/mrf/force_mentions_in_content_test.exs Normal file
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@ -0,0 +1,34 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.ForceMentionsInContentTest do
alias Pleroma.Web.ActivityPub.MRF.ForceMentionsInContent
import Pleroma.Factory
use Pleroma.DataCase
test "adds mentions to post content" do
users = %{
"lain@lain.com" => "https://lain.com/users/lain",
"coolboymew@shitposter.club" => "https://shitposter.club/users/coolboymew",
"dielan@shitposter.club" => "https://shitposter.club/users/dielan",
"hakui@tuusin.misono-ya.info" => "https://tuusin.misono-ya.info/users/hakui",
"fence@xyzzy.link" => "https://xyzzy.link/users/fence"
}
Enum.each(users, fn {nickname, ap_id} ->
insert(:user, ap_id: ap_id, nickname: nickname, local: false)
end)
object = File.read!("test/fixtures/soapbox_no_mentions_in_content.json") |> Jason.decode!()
activity = %{
"type" => "Create",
"actor" => "https://gleasonator.com/users/alex",
"object" => object
}
{:ok, %{"object" => %{"content" => filtered}}} = ForceMentionsInContent.filter(activity)
Enum.each(users, fn {nickname, _} -> assert filtered =~ nickname end)
end
end