defmodule Pleroma.Web.Metadata.Providers.TwitterCard do def build_tags(%{activity: activity}) do if Enum.any?(activity.data["object"]["tag"], fn tag -> tag == "nsfw" end) or activity.data["object"]["attachment"] == [] do build_tags(nil) else case find_first_acceptable_media_type(activity) 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) end end end def build_tags(_) do [{:meta, [property: "twitter:card", content: "summary"], []}] end def find_first_acceptable_media_type(%{data: %{"object" => %{"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) end) end) end) end end