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

   1 defmodule Pleroma.Web.Metadata do
   2   alias Phoenix.HTML
   3   alias Pleroma.{Web, Formatter}
   4   alias Pleroma.{User, Activity}
   5   alias Pleroma.Web.MediaProxy
   6
   7   def build_tags(request_url, params) do
   8     Enum.concat([
   9       if(meta_enabled?(:opengraph), do: opengraph_tags(params), else: []),
  10       if(meta_enabled?(:oembed), do: oembed_links(request_url), else: [])
  11     ])
  12     |> Enum.map(&to_tag/1)
  13     |> Enum.map(&HTML.safe_to_string/1)
  14     |> Enum.join("\n")
  15   end
  16
  17   def meta_enabled?(type) do
  18     config = Pleroma.Config.get(:metadata, [])
  19     Keyword.get(config, type, false)
  20   end
  21
  22   # opengraph for single status
  23   defp opengraph_tags(%{activity: activity, user: user}) do
  24     with truncated_content = Formatter.truncate(activity.data["object"]["content"]) do
  25       [
  26         {:meta,
  27           [
  28             property: "og:title",
  29             content: "#{user.name} (@#{user.nickname}@#{pleroma_domain()}) post ##{activity.id}"
  30           ], []},
  31         {:meta, [property: "og:url", content: activity.data["id"]], []},
  32         {:meta, [property: "og:description", content: truncated_content],
  33           []},
  34         {:meta, [property: "og:image", content: user_avatar_url(user)], []},
  35         {:meta, [property: "og:image:width", content: 120], []},
  36         {:meta, [property: "og:image:height", content: 120], []},
  37         {:meta, [property: "twitter:card", content: "summary"], []}
  38       ]
  39     end
  40   end
  41
  42   # opengraph for user card
  43   defp opengraph_tags(%{user: user}) do
  44     with truncated_bio = Formatter.truncate(user.bio) do
  45       [
  46         {:meta,
  47           [
  48             property: "og:title",
  49             content: "#{user.name} (@#{user.nickname}@#{pleroma_domain()}) profile"
  50           ], []},
  51         {:meta, [property: "og:url", content: User.profile_url(user)], []},
  52         {:meta, [property: "og:description", content: truncated_bio], []},
  53         {:meta, [property: "og:image", content: user_avatar_url(user)], []},
  54         {:meta, [property: "og:image:width", content: 120], []},
  55         {:meta, [property: "og:image:height", content: 120], []},
  56         {:meta, [property: "twitter:card", content: "summary"], []}
  57       ]
  58     end
  59   end
  60
  61   defp oembed_links(url) do
  62     Enum.map(["xml", "json"], fn format ->
  63       href = HTML.raw(oembed_path(url, format))
  64       { :link, [ type: ["application/#{format}+oembed"], href: href, rel: 'alternate'], [] }
  65     end)
  66   end
  67
  68   def to_tag(data) do
  69     with {name, attrs, _content = []} <- data do
  70       HTML.Tag.tag(name, attrs)
  71     else
  72       {name, attrs, content} ->
  73         HTML.Tag.content_tag(name, content, attrs)
  74
  75       _ ->
  76         raise ArgumentError, message: "make_tag invalid args"
  77     end
  78   end
  79
  80   defp oembed_path(url, format) do
  81     query = URI.encode_query(%{url: url, format: format})
  82     "#{Web.base_url()}/oembed?#{query}"
  83   end
  84
  85   defp user_avatar_url(user) do
  86     User.avatar_url(user) |> MediaProxy.url()
  87   end
  88
  89   def pleroma_domain do
  90     Pleroma.Config.get([:instance, :domain], "UNKNOWN_DOMAIN")
  91   end
  92 end