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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 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_tags(params) do
   9     providers = [
  10       Pleroma.Web.Metadata.Providers.RestrictIndexing
  11       | Pleroma.Config.get([__MODULE__, :providers], [])
  12     ]
  13
  14     Enum.reduce(providers, "", fn parser, acc ->
  15       rendered_html =
  16         params
  17         |> parser.build_tags()
  18         |> Enum.map(&to_tag/1)
  19         |> Enum.map(&HTML.safe_to_string/1)
  20         |> Enum.join()
  21
  22       acc <> rendered_html
  23     end)
  24   end
  25
  26   def to_tag(data) do
  27     with {name, attrs, _content = []} <- data do
  28       HTML.Tag.tag(name, attrs)
  29     else
  30       {name, attrs, content} ->
  31         HTML.Tag.content_tag(name, content, attrs)
  32
  33       _ ->
  34         raise ArgumentError, message: "make_tag invalid args"
  35     end
  36   end
  37
  38   def activity_nsfw?(%{data: %{"sensitive" => sensitive}}) do
  39     Pleroma.Config.get([__MODULE__, :unfurl_nsfw], false) == false and sensitive
  40   end
  41
  42   def activity_nsfw?(_) do
  43     false
  44   end
  45 end