git.squeep.com Git - akkoma/blob - lib/pleroma/web/metadata/opengraph.ex

   1 defmodule Pleroma.Web.Metadata.Providers.OpenGraph do
   2   alias Pleroma.Web.Metadata.Providers.Provider
   3   alias Pleroma.{HTML, Formatter, User}
   4   alias Pleroma.Web.MediaProxy
   5
   6   @behaviour Provider
   7
   8   @impl Provider
   9   def build_tags(%{activity: activity, user: user}) do
  10     with truncated_content = scrub_html_and_truncate(activity.data["object"]["content"]) do
  11       [
  12         {:meta,
  13          [
  14            property: "og:title",
  15            content: user_name_string(user)
  16          ], []},
  17         {:meta, [property: "og:url", content: activity.data["id"]], []},
  18         {:meta, [property: "og:description", content: truncated_content], []},
  19         {:meta, [property: "og:image", content: user_avatar_url(user)], []},
  20         {:meta, [property: "og:image:width", content: 120], []},
  21         {:meta, [property: "og:image:height", content: 120], []},
  22         {:meta, [property: "twitter:card", content: "summary"], []}
  23       ]
  24     end
  25   end
  26
  27   @impl Provider
  28   def build_tags(%{user: user}) do
  29     with truncated_bio = scrub_html_and_truncate(user.bio || "") do
  30       [
  31         {:meta,
  32          [
  33            property: "og:title",
  34            content: user_name_string(user)
  35          ], []},
  36         {:meta, [property: "og:url", content: User.profile_url(user)], []},
  37         {:meta, [property: "og:description", content: truncated_bio], []},
  38         {:meta, [property: "og:image", content: user_avatar_url(user)], []},
  39         {:meta, [property: "og:image:width", content: 120], []},
  40         {:meta, [property: "og:image:height", content: 120], []},
  41         {:meta, [property: "twitter:card", content: "summary"], []}
  42       ]
  43     end
  44   end
  45
  46   defp scrub_html_and_truncate(content) do
  47     content
  48     # html content comes from DB already encoded, decode first and scrub after
  49     |> HtmlEntities.decode()
  50     |> String.replace(~r/<br\s?\/?>/, " ")
  51     |> HTML.strip_tags()
  52     |> Formatter.truncate()
  53   end
  54
  55   defp user_avatar_url(user) do
  56     User.avatar_url(user) |> MediaProxy.url()
  57   end
  58
  59   defp user_name_string(user) do
  60     "#{user.name}" <>
  61       if user.local do
  62         "(@#{user.nickname}@#{Pleroma.Web.Endpoint.host()})"
  63       else
  64         "(@#{user.nickname})"
  65       end
  66   end
  67 end