# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.Metadata.Providers.TwitterCard do
- alias Pleroma.Web.Metadata.Providers.Provider
+ alias Pleroma.User
alias Pleroma.Web.Metadata
+ alias Pleroma.Web.Metadata.Providers.Provider
+ alias Pleroma.Web.Metadata.Utils
@behaviour Provider
@impl Provider
- def build_tags(%{object: object}) do
- if Metadata.activity_nsfw?(object) or object.data["attachment"] == [] do
- build_tags(nil)
- else
- case find_first_acceptable_media_type(object) do
- "image" ->
- [{:meta, [property: "twitter:card", content: "summary_large_image"], []}]
-
- "audio" ->
- [{:meta, [property: "twitter:card", content: "player"], []}]
-
- "video" ->
- [{:meta, [property: "twitter:card", content: "player"], []}]
-
- _ ->
- build_tags(nil)
+ def build_tags(%{
+ activity_id: id,
+ object: object,
+ user: user
+ }) do
+ attachments = build_attachments(id, object)
+ scrubbed_content = Utils.scrub_html_and_truncate(object)
+ # Zero width space
+ content =
+ if scrubbed_content != "" and scrubbed_content != "\u200B" do
+ "“" <> scrubbed_content <> "”"
+ else
+ ""
+ end
+
+ [
+ {:meta,
+ [
+ property: "twitter:title",
+ content: Utils.user_name_string(user)
+ ], []},
+ {:meta,
+ [
+ property: "twitter:description",
+ content: content
+ ], []}
+ ] ++
+ if attachments == [] or Metadata.activity_nsfw?(object) do
+ [
+ {:meta,
+ [property: "twitter:image", content: Utils.attachment_url(User.avatar_url(user))], []},
+ {:meta, [property: "twitter:card", content: "summary_large_image"], []}
+ ]
+ else
+ attachments
end
- end
end
@impl Provider
- def build_tags(_) do
- [{:meta, [property: "twitter:card", content: "summary"], []}]
+ def build_tags(%{user: user}) do
+ with truncated_bio = Utils.scrub_html_and_truncate(user.bio || "") do
+ [
+ {:meta,
+ [
+ property: "twitter:title",
+ content: Utils.user_name_string(user)
+ ], []},
+ {:meta, [property: "twitter:description", content: truncated_bio], []},
+ {:meta, [property: "twitter:image", content: Utils.attachment_url(User.avatar_url(user))],
+ []},
+ {:meta, [property: "twitter:card", content: "summary"], []}
+ ]
+ end
end
- def find_first_acceptable_media_type(%{data: %{"attachment" => attachment}}) do
- Enum.find_value(attachment, fn attachment ->
- Enum.find_value(attachment["url"], fn url ->
- Enum.find(["image", "audio", "video"], fn media_type ->
- String.starts_with?(url["mediaType"], media_type)
+ defp build_attachments(id, %{data: %{"attachment" => attachments}}) do
+ Enum.reduce(attachments, [], fn attachment, acc ->
+ rendered_tags =
+ Enum.reduce(attachment["url"], [], fn url, acc ->
+ media_type =
+ Enum.find(["image", "audio", "video"], fn media_type ->
+ String.starts_with?(url["mediaType"], media_type)
+ end)
+
+ # TODO: Add additional properties to objects when we have the data available.
+ case media_type do
+ "audio" ->
+ [
+ {:meta, [property: "twitter:card", content: "player"], []},
+ {:meta, [property: "twitter:player:width", content: "480"], []},
+ {:meta, [property: "twitter:player:height", content: "80"], []},
+ {:meta, [property: "twitter:player", content: player_url(id)], []}
+ | acc
+ ]
+
+ "image" ->
+ [
+ {:meta, [property: "twitter:card", content: "summary_large_image"], []},
+ {:meta,
+ [
+ property: "twitter:player",
+ content: Utils.attachment_url(url["href"])
+ ], []}
+ | acc
+ ]
+
+ # TODO: Need the true width and height values here or Twitter renders an iFrame with
+ # a bad aspect ratio
+ "video" ->
+ [
+ {:meta, [property: "twitter:card", content: "player"], []},
+ {:meta, [property: "twitter:player", content: player_url(id)], []},
+ {:meta, [property: "twitter:player:width", content: "480"], []},
+ {:meta, [property: "twitter:player:height", content: "480"], []}
+ | acc
+ ]
+
+ _ ->
+ acc
+ end
end)
- end)
+
+ acc ++ rendered_tags
end)
end
+
+ defp player_url(id) do
+ Pleroma.Web.Router.Helpers.o_status_url(Pleroma.Web.Endpoint, :notice_player, id)
+ end
end