1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.TagPolicy do
alias Pleroma.User
@behaviour Pleroma.Web.ActivityPub.MRF
@moduledoc """
Apply policies based on user tags
This policy applies policies on a user activities depending on their tags
on your instance.
- `mrf_tag:media-force-nsfw`: Mark as sensitive on presence of attachments
- `mrf_tag:media-strip`: Remove attachments
- `mrf_tag:force-unlisted`: Mark as unlisted (removes from the federated timeline)
- `mrf_tag:sandbox`: Remove from public (local and federated) timelines
- `mrf_tag:disable-remote-subscription`: Reject non-local follow requests
- `mrf_tag:disable-any-subscription`: Reject any follow requests
"""
require Pleroma.Constants
defp get_tags(%User{tags: tags}) when is_list(tags), do: tags
defp get_tags(_), do: []
defp process_tag(
"mrf_tag:media-force-nsfw",
%{
"type" => "Create",
"object" => %{"attachment" => child_attachment} = object
} = message
)
when length(child_attachment) > 0 do
tags = (object["tag"] || []) ++ ["nsfw"]
object =
object
|> Map.put("tag", tags)
|> Map.put("sensitive", true)
message = Map.put(message, "object", object)
{:ok, message}
end
defp process_tag(
"mrf_tag:media-strip",
%{
"type" => "Create",
"object" => %{"attachment" => child_attachment} = object
} = message
)
when length(child_attachment) > 0 do
object = Map.delete(object, "attachment")
message = Map.put(message, "object", object)
{:ok, message}
end
defp process_tag(
"mrf_tag:force-unlisted",
%{
"type" => "Create",
"to" => to,
"cc" => cc,
"actor" => actor,
"object" => object
} = message
) do
user = User.get_cached_by_ap_id(actor)
if Enum.member?(to, Pleroma.Constants.as_public()) do
to = List.delete(to, Pleroma.Constants.as_public()) ++ [user.follower_address]
cc = List.delete(cc, user.follower_address) ++ [Pleroma.Constants.as_public()]
object =
object
|> Map.put("to", to)
|> Map.put("cc", cc)
message =
message
|> Map.put("to", to)
|> Map.put("cc", cc)
|> Map.put("object", object)
{:ok, message}
else
{:ok, message}
end
end
defp process_tag(
"mrf_tag:sandbox",
%{
"type" => "Create",
"to" => to,
"cc" => cc,
"actor" => actor,
"object" => object
} = message
) do
user = User.get_cached_by_ap_id(actor)
if Enum.member?(to, Pleroma.Constants.as_public()) or
Enum.member?(cc, Pleroma.Constants.as_public()) do
to = List.delete(to, Pleroma.Constants.as_public()) ++ [user.follower_address]
cc = List.delete(cc, Pleroma.Constants.as_public())
object =
object
|> Map.put("to", to)
|> Map.put("cc", cc)
message =
message
|> Map.put("to", to)
|> Map.put("cc", cc)
|> Map.put("object", object)
{:ok, message}
else
{:ok, message}
end
end
defp process_tag(
"mrf_tag:disable-remote-subscription",
%{"type" => "Follow", "actor" => actor} = message
) do
user = User.get_cached_by_ap_id(actor)
if user.local == true do
{:ok, message}
else
{:reject,
"[TagPolicy] Follow from #{actor} tagged with mrf_tag:disable-remote-subscription"}
end
end
defp process_tag("mrf_tag:disable-any-subscription", %{"type" => "Follow", "actor" => actor}),
do: {:reject, "[TagPolicy] Follow from #{actor} tagged with mrf_tag:disable-any-subscription"}
defp process_tag(_, message), do: {:ok, message}
def filter_message(actor, message) do
User.get_cached_by_ap_id(actor)
|> get_tags()
|> Enum.reduce({:ok, message}, fn
tag, {:ok, message} ->
process_tag(tag, message)
_, error ->
error
end)
end
@impl true
def filter(%{"object" => target_actor, "type" => "Follow"} = message),
do: filter_message(target_actor, message)
@impl true
def filter(%{"actor" => actor, "type" => "Create"} = message),
do: filter_message(actor, message)
@impl true
def filter(message), do: {:ok, message}
@impl true
def describe, do: {:ok, %{}}
end
|