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
|
defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
alias Pleroma.Web.Metadata.Providers.Provider
alias Pleroma.{HTML, Formatter, User}
alias Pleroma.Web.MediaProxy
@behaviour Provider
@impl Provider
def build_tags(%{activity: activity, user: user}) do
with truncated_content = scrub_html_and_truncate(activity.data["object"]["content"]) do
attachments = build_attachments(activity)
[
{:meta,
[
property: "og:title",
content: user_name_string(user)
], []},
{:meta, [property: "og:url", content: activity.data["id"]], []},
{:meta, [property: "og:description", content: truncated_content], []},
{:meta, [property: "twitter:card", content: "summary"], []}
] ++ if attachments == [] do [
{:meta, [property: "og:image", content: attachment_url(User.avatar_url(user))], []},
{:meta, [property: "og:image:width", content: 120], []},
{:meta, [property: "og:image:height", content: 120], []} ] else attachments end
end
end
@impl Provider
def build_tags(%{user: user}) do
with truncated_bio = scrub_html_and_truncate(user.bio || "") do
[
{:meta,
[
property: "og:title",
content: user_name_string(user)
], []},
{:meta, [property: "og:url", content: User.profile_url(user)], []},
{:meta, [property: "og:description", content: truncated_bio], []},
{:meta, [property: "og:image", content: attachment_url(User.avatar_url(user))], []},
{:meta, [property: "og:image:width", content: 120], []},
{:meta, [property: "og:image:height", content: 120], []},
{:meta, [property: "twitter:card", content: "summary"], []}
]
end
end
defp build_attachments(activity) do
Enum.reduce(activity.data["object"]["attachment"], [], fn attachment, acc ->
rendered_tags =
Enum.map(attachment["url"], fn url ->
media_type =
Enum.find(["image", "audio", "video"], fn media_type ->
String.starts_with?(url["mediaType"], media_type)
end)
if media_type do
{:meta, [property: "og:" <> media_type, content: attachment_url(url["href"])], []}
else
nil
end
end)
Enum.reject(rendered_tags, &is_nil/1)
acc ++ rendered_tags
end)
end
defp scrub_html_and_truncate(content) do
content
# html content comes from DB already encoded, decode first and scrub after
|> HtmlEntities.decode()
|> String.replace(~r/<br\s?\/?>/, " ")
|> HTML.strip_tags()
|> Formatter.truncate()
end
defp attachment_url(url) do
MediaProxy.url(url)
end
defp user_name_string(user) do
"#{user.name}" <>
if user.local do
"(@#{user.nickname}@#{Pleroma.Web.Endpoint.host()})"
else
"(@#{user.nickname})"
end
end
end
|
