git.squeep.com Git - akkoma/blob - lib/pleroma/activity/ir/topics.ex

   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.Activity.Ir.Topics do
   6   alias Pleroma.Object
   7   alias Pleroma.Web.ActivityPub.Visibility
   8
   9   def get_activity_topics(activity) do
  10     activity
  11     |> Object.normalize()
  12     |> generate_topics(activity)
  13     |> List.flatten()
  14   end
  15
  16   defp generate_topics(%{data: %{"type" => "Answer"}}, _) do
  17     []
  18   end
  19
  20   defp generate_topics(object, activity) do
  21     ["user", "list"] ++ visibility_tags(object, activity)
  22   end
  23
  24   defp visibility_tags(object, activity) do
  25     case Visibility.get_visibility(activity) do
  26       "public" ->
  27         if activity.local do
  28           ["public", "public:local"]
  29         else
  30           ["public"]
  31         end
  32         |> item_creation_tags(object, activity)
  33
  34       "direct" ->
  35         ["direct"]
  36
  37       _ ->
  38         []
  39     end
  40   end
  41
  42   defp item_creation_tags(tags, %{data: %{"type" => "Create"}} = object, activity) do
  43     tags ++ hashtags_to_topics(object) ++ attachment_topics(object, activity)
  44   end
  45
  46   defp item_creation_tags(tags, _, _) do
  47     tags
  48   end
  49
  50   defp hashtags_to_topics(%{data: %{"tag" => tags}}) do
  51     tags
  52     |> Enum.filter(&is_bitstring(&1))
  53     |> Enum.map(fn tag -> "hashtag:" <> tag end)
  54   end
  55
  56   defp hashtags_to_topics(_), do: []
  57
  58   defp attachment_topics(%{data: %{"attachment" => []}}, _act), do: []
  59
  60   defp attachment_topics(_object, %{local: true}), do: ["public:media", "public:local:media"]
  61
  62   defp attachment_topics(_object, _act), do: ["public:media"]
  63 end