git.squeep.com Git - akkoma/blob - lib/pleroma/web/activity_pub/transmogrifier.ex

   1 defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   2   @moduledoc """
   3   A module to handle coding from internal to wire ActivityPub and back.
   4   """
   5   alias Pleroma.User
   6   alias Pleroma.Web.ActivityPub.ActivityPub
   7
   8   @doc """
   9   Modifies an incoming AP object (mastodon format) to our internal format.
  10   """
  11   def fix_object(object) do
  12     object
  13     |> Map.put("actor", object["attributedTo"])
  14   end
  15
  16   # TODO: validate those with a Ecto scheme
  17   # - tags
  18   # - emoji
  19   def handle_incoming(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
  20     with %User{} = user <- User.get_or_fetch_by_ap_id(data["actor"]) do
  21       object = fix_object(data["object"])
  22       params = %{
  23         to: data["to"],
  24         object: object,
  25         actor: user,
  26         context: data["object"]["conversation"],
  27         local: false,
  28         published: data["published"],
  29         additional: Map.take(data, [
  30               "cc",
  31               "id"
  32             ])
  33       }
  34
  35       ActivityPub.create(params)
  36     else
  37       _e -> :error
  38     end
  39   end
  40
  41   @doc
  42   """
  43   internal -> Mastodon
  44   """
  45   def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
  46     object = object
  47     |> add_mention_tags
  48     |> add_attributed_to
  49
  50     data = data
  51     |> Map.put("object", object)
  52     |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
  53
  54     {:ok, data}
  55   end
  56
  57   def add_mention_tags(object) do
  58     mentions = object["to"]
  59     |> Enum.map(fn (ap_id) -> User.get_cached_by_ap_id(ap_id) end)
  60     |> Enum.filter(&(&1))
  61     |> Enum.map(fn(user) -> %{"type" => "mention", "href" => user.ap_id, "name" => "@#{user.nickname}"} end)
  62
  63     tags = object["tags"] || []
  64
  65     object
  66     |> Map.put("tags", tags ++ mentions)
  67   end
  68
  69   def add_attributed_to(object) do
  70     attributedTo = object["attributedTo"] || object["actor"]
  71
  72     object
  73     |> Map.put("attributedTo", attributedTo)
  74   end
  75 end