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
|
# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Activity.Ir.Topics do
alias Pleroma.Object
alias Pleroma.Web.ActivityPub.Visibility
def get_activity_topics(activity) do
activity
|> Object.normalize(fetch: false)
|> generate_topics(activity)
|> List.flatten()
end
defp generate_topics(%{data: %{"type" => "Answer"}}, _) do
[]
end
defp generate_topics(object, activity) do
["user", "list"] ++ visibility_tags(object, activity)
end
defp visibility_tags(object, activity) do
case Visibility.get_visibility(activity) do
"public" ->
if activity.local do
["public", "public:local"]
else
["public"]
end
|> item_creation_tags(object, activity)
"direct" ->
["direct"]
_ ->
[]
end
end
defp item_creation_tags(tags, object, %{data: %{"type" => "Create"}} = activity) do
tags ++
remote_topics(activity) ++ hashtags_to_topics(object) ++ attachment_topics(object, activity)
end
defp item_creation_tags(tags, _, _) do
tags
end
defp hashtags_to_topics(object) do
object
|> Object.hashtags()
|> Enum.map(fn hashtag -> "hashtag:" <> hashtag end)
end
defp remote_topics(%{local: true}), do: []
defp remote_topics(%{actor: actor}) when is_binary(actor),
do: ["public:remote:" <> URI.parse(actor).host]
defp remote_topics(_), do: []
defp attachment_topics(%{data: %{"attachment" => []}}, _act), do: []
defp attachment_topics(_object, %{local: true}), do: ["public:media", "public:local:media"]
defp attachment_topics(_object, %{actor: actor}) when is_binary(actor),
do: ["public:media", "public:remote:media:" <> URI.parse(actor).host]
defp attachment_topics(_object, _act), do: ["public:media"]
end
|