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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.Metadata do
   6   alias Phoenix.HTML
   7
   8   def build_static_tags(params) do
   9     providers = [
  10       Pleroma.Web.Metadata.Providers.Theme
  11     ]
  12
  13     Enum.reduce(providers, "", fn parser, acc ->
  14       rendered_html =
  15         params
  16         |> parser.build_tags()
  17         |> Enum.map(&to_tag/1)
  18         |> Enum.map(&HTML.safe_to_string/1)
  19         |> Enum.join()
  20
  21       acc <> rendered_html
  22     end)
  23   end
  24
  25   def build_tags(params) do
  26     providers = [
  27       Pleroma.Web.Metadata.Providers.RelMe,
  28       Pleroma.Web.Metadata.Providers.RestrictIndexing,
  29       Pleroma.Web.Metadata.Providers.Theme
  30       | activated_providers()
  31     ]
  32
  33     Enum.reduce(providers, "", fn parser, acc ->
  34       rendered_html =
  35         params
  36         |> parser.build_tags()
  37         |> Enum.map(&to_tag/1)
  38         |> Enum.map(&HTML.safe_to_string/1)
  39         |> Enum.join()
  40
  41       acc <> rendered_html
  42     end)
  43   end
  44
  45   def to_tag(data) do
  46     with {name, attrs, _content = []} <- data do
  47       HTML.Tag.tag(name, attrs)
  48     else
  49       {name, attrs, content} ->
  50         HTML.Tag.content_tag(name, content, attrs)
  51
  52       _ ->
  53         raise ArgumentError, message: "make_tag invalid args"
  54     end
  55   end
  56
  57   def activity_nsfw?(%{data: %{"sensitive" => sensitive}}) do
  58     Pleroma.Config.get([__MODULE__, :unfurl_nsfw], false) == false and sensitive
  59   end
  60
  61   def activity_nsfw?(_) do
  62     false
  63   end
  64
  65   defp activated_providers do
  66     unless Pleroma.Config.restrict_unauthenticated_access?(:activities, :local) do
  67       [Pleroma.Web.Metadata.Providers.Feed | Pleroma.Config.get([__MODULE__, :providers], [])]
  68     else
  69       []
  70     end
  71   end
  72 end