1 defmodule Pleroma.Web.ActivityPub.Transmogrifier do
3 A module to handle coding from internal to wire ActivityPub and back.
8 alias Pleroma.Web.ActivityPub.ActivityPub
11 Modifies an incoming AP object (mastodon format) to our internal format.
13 def fix_object(object) do
15 |> Map.put("actor", object["attributedTo"])
19 def fix_attachments(object) do
20 attachments = (object["attachment"] || [])
21 |> Enum.map(fn (data) ->
22 url = [%{"type" => "Link", "mediaType" => data["mediaType"], "href" => data["url"]}]
23 Map.put(data, "url", url)
27 |> Map.put("attachment", attachments)
30 # TODO: validate those with a Ecto scheme
33 def handle_incoming(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
34 with %User{} = user <- User.get_or_fetch_by_ap_id(data["actor"]) do
35 object = fix_object(data["object"])
40 context: data["object"]["conversation"],
42 published: data["published"],
43 additional: Map.take(data, [
49 ActivityPub.create(params)
55 def handle_incoming(%{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = data) do
56 with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
57 %User{} = follower <- User.get_or_fetch_by_ap_id(follower),
58 {:ok, activity} <- ActivityPub.follow(follower, followed, id, false) do
59 ActivityPub.accept(%{to: [follower.ap_id], actor: followed.ap_id, object: data, local: true})
60 User.follow(follower, followed)
67 def handle_incoming(%{"type" => "Like", "object" => object_id, "actor" => actor, "id" => id} = data) do
68 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
69 %Object{} = object <- Object.get_by_ap_id(object_id),
70 {:ok, activity, object} <- ActivityPub.like(actor, object, id, false) do
77 def handle_incoming(%{"type" => "Announce", "object" => object_id, "actor" => actor, "id" => id} = data) do
78 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
79 {:ok, object} <- get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
80 {:ok, activity, object} <- ActivityPub.announce(actor, object, id, false) do
91 def handle_incoming(_), do: :error
93 def get_obj_helper(id) do
94 if object = Object.get_by_ap_id(id), do: {:ok, object}, else: nil
101 def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
105 |> prepare_attachments
108 |> Map.put("object", object)
109 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
114 def prepare_outgoing(%{"type" => type} = data) when type in ["Follow", "Accept", "Like", "Announce"] do
116 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
121 def add_mention_tags(object) do
122 mentions = object["to"]
123 |> Enum.map(fn (ap_id) -> User.get_cached_by_ap_id(ap_id) end)
124 |> Enum.filter(&(&1))
125 |> Enum.map(fn(user) -> %{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"} end)
127 tags = object["tag"] || []
130 |> Map.put("tag", tags ++ mentions)
133 def add_attributed_to(object) do
134 attributedTo = object["attributedTo"] || object["actor"]
137 |> Map.put("attributedTo", attributedTo)
140 def prepare_attachments(object) do
141 attachments = (object["attachment"] || [])
142 |> Enum.map(fn (data) ->
143 [%{"mediaType" => media_type, "href" => href} | _] = data["url"]
144 %{"url" => href, "mediaType" => media_type, "name" => data["name"], "type" => "Document"}
148 |> Map.put("attachment", attachments)