akkoma/lib/pleroma/web/metadata/opengraph.ex

66 lines
2.1 KiB
Elixir

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
[
{: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: "og:image", content: 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
@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: 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 scrub_html_and_truncate(content) do
content
# html content comes from DB already encoded, decode first and scrub after
|> HtmlEntities.decode()
|> HTML.strip_tags()
|> Formatter.truncate()
end
defp user_avatar_url(user) do
User.avatar_url(user) |> MediaProxy.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