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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.Metadata.Utils do
   6   alias Pleroma.Formatter
   7   alias Pleroma.HTML
   8   alias Pleroma.Web.MediaProxy
   9
  10   def scrub_html_and_truncate(%{data: %{"content" => content}} = object) do
  11     content
  12     # html content comes from DB already encoded, decode first and scrub after
  13     |> HtmlEntities.decode()
  14     |> String.replace(~r/<br\s?\/?>/, " ")
  15     |> HTML.get_cached_stripped_html_for_activity(object, "metadata")
  16     |> Formatter.demojify()
  17     |> HtmlEntities.decode()
  18     |> Formatter.truncate()
  19   end
  20
  21   def scrub_html_and_truncate(content, max_length \\ 200) when is_binary(content) do
  22     content
  23     # html content comes from DB already encoded, decode first and scrub after
  24     |> HtmlEntities.decode()
  25     |> String.replace(~r/<br\s?\/?>/, " ")
  26     |> HTML.strip_tags()
  27     |> Formatter.demojify()
  28     |> HtmlEntities.decode()
  29     |> Formatter.truncate(max_length)
  30   end
  31
  32   def attachment_url(url) do
  33     MediaProxy.url(url)
  34   end
  35
  36   def user_name_string(user) do
  37     "#{user.name} " <>
  38       if user.local do
  39         "(@#{user.nickname}@#{Pleroma.Web.Endpoint.host()})"
  40       else
  41         "(@#{user.nickname})"
  42       end
  43   end
  44
  45   @spec fetch_media_type(list(String.t()), String.t()) :: String.t() | nil
  46   def fetch_media_type(supported_types, media_type) do
  47     Enum.find(supported_types, fn support_type ->
  48       String.starts_with?(media_type, support_type)
  49     end)
  50   end
  51 end