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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.Utils do
   6   alias Pleroma.Emoji
   7   alias Pleroma.Formatter
   8   alias Pleroma.HTML
   9   alias Pleroma.Web.MediaProxy
  10
  11   def scrub_html_and_truncate(%{data: %{"content" => content}} = object) do
  12     content
  13     # html content comes from DB already encoded, decode first and scrub after
  14     |> HtmlEntities.decode()
  15     |> String.replace(~r/<br\s?\/?>/, " ")
  16     |> HTML.get_cached_stripped_html_for_activity(object, "metadata")
  17     |> Emoji.Formatter.demojify()
  18     |> HtmlEntities.decode()
  19     |> Formatter.truncate()
  20   end
  21
  22   def scrub_html_and_truncate(content, max_length \\ 200) when is_binary(content) do
  23     content
  24     |> scrub_html
  25     |> Emoji.Formatter.demojify()
  26     |> HtmlEntities.decode()
  27     |> Formatter.truncate(max_length)
  28   end
  29
  30   def scrub_html(content) when is_binary(content) do
  31     content
  32     # html content comes from DB already encoded, decode first and scrub after
  33     |> HtmlEntities.decode()
  34     |> String.replace(~r/<br\s?\/?>/, " ")
  35     |> HTML.strip_tags()
  36   end
  37
  38   def scrub_html(content), do: content
  39
  40   def attachment_url(url) do
  41     MediaProxy.preview_url(url)
  42   end
  43
  44   def user_name_string(user) do
  45     "#{user.name} " <>
  46       if user.local do
  47         "(@#{user.nickname}@#{Pleroma.Web.Endpoint.host()})"
  48       else
  49         "(@#{user.nickname})"
  50       end
  51   end
  52
  53   @spec fetch_media_type(list(String.t()), String.t()) :: String.t() | nil
  54   def fetch_media_type(supported_types, media_type) do
  55     Enum.find(supported_types, fn support_type ->
  56       String.starts_with?(media_type, support_type)
  57     end)
  58   end
  59 end