1 defmodule Pleroma.Web.ActivityPub.Transmogrifier do
3 A module to handle coding from internal to wire ActivityPub and back.
9 alias Pleroma.Web.ActivityPub.ActivityPub
16 Modifies an incoming AP object (mastodon format) to our internal format.
18 def fix_object(object) do
20 |> Map.put("actor", object["attributedTo"])
27 def fix_in_reply_to(%{"inReplyTo" => in_reply_to_id} = object) when not is_nil(in_reply_to_id) do
28 case ActivityPub.fetch_object_from_id(in_reply_to_id) do
29 {:ok, replied_object} ->
30 activity = Activity.get_create_activity_by_object_ap_id(replied_object.data["id"])
32 |> Map.put("inReplyTo", replied_object.data["id"])
33 |> Map.put("inReplyToAtomUri", object["inReplyToAtomUri"] || in_reply_to_id)
34 |> Map.put("inReplyToStatusId", activity.id)
35 |> Map.put("conversation", replied_object.data["context"] || object["conversation"])
36 |> Map.put("context", replied_object.data["context"] || object["conversation"])
38 Logger.error("Couldn't fetch #{object["inReplyTo"]} #{inspect(e)}")
42 def fix_in_reply_to(object), do: object
44 def fix_context(object) do
46 |> Map.put("context", object["conversation"])
49 def fix_attachments(object) do
50 attachments = (object["attachment"] || [])
51 |> Enum.map(fn (data) ->
52 url = [%{"type" => "Link", "mediaType" => data["mediaType"], "href" => data["url"]}]
53 Map.put(data, "url", url)
57 |> Map.put("attachment", attachments)
60 def fix_emoji(object) do
61 tags = (object["tag"] || [])
62 emoji = tags |> Enum.filter(fn (data) -> data["type"] == "Emoji" and data["icon"] end)
63 emoji = emoji |> Enum.reduce(%{}, fn (data, mapping) ->
65 if String.starts_with?(name, ":") do
66 name = name |> String.slice(1..-2)
69 mapping |> Map.put(name, data["icon"]["url"])
72 # we merge mastodon and pleroma emoji into a single mapping, to allow for both wire formats
73 emoji = Map.merge(object["emoji"] || %{}, emoji)
76 |> Map.put("emoji", emoji)
79 # TODO: validate those with a Ecto scheme
82 def handle_incoming(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
83 with nil <- Activity.get_create_activity_by_object_ap_id(object["id"]),
84 %User{} = user <- User.get_or_fetch_by_ap_id(data["actor"]) do
85 object = fix_object(data["object"])
91 context: object["conversation"],
93 published: data["published"],
94 additional: Map.take(data, [
101 ActivityPub.create(params)
103 %Activity{} = activity -> {:ok, activity}
108 def handle_incoming(%{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = data) do
109 with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
110 %User{} = follower <- User.get_or_fetch_by_ap_id(follower),
111 {:ok, activity} <- ActivityPub.follow(follower, followed, id, false) do
112 ActivityPub.accept(%{to: [follower.ap_id], actor: followed.ap_id, object: data, local: true})
113 User.follow(follower, followed)
120 def handle_incoming(%{"type" => "Like", "object" => object_id, "actor" => actor, "id" => id} = data) do
121 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
122 {:ok, object} <- get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
123 {:ok, activity, object} <- ActivityPub.like(actor, object, id, false) do
130 def handle_incoming(%{"type" => "Announce", "object" => object_id, "actor" => actor, "id" => id} = data) do
131 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
132 {:ok, object} <- get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
133 {:ok, activity, object} <- ActivityPub.announce(actor, object, id, false) do
140 def handle_incoming(%{"type" => "Update", "object" => %{"type" => "Person"} = object, "actor" => actor_id} = data) do
141 with %User{ap_id: ^actor_id} = actor <- User.get_by_ap_id(object["id"]) do
142 {:ok, new_user_data} = ActivityPub.user_data_from_user_object(object)
144 banner = new_user_data[:info]["banner"]
145 update_data = new_user_data
146 |> Map.take([:name, :bio, :avatar])
147 |> Map.put(:info, Map.merge(actor.info, %{"banner" => banner}))
150 |> User.upgrade_changeset(update_data)
151 |> User.update_and_set_cache()
153 ActivityPub.update(%{local: false, to: data["to"] || [], cc: data["cc"] || [], object: object, actor: actor_id})
162 def handle_incoming(%{"type" => "Delete", "object" => object_id, "actor" => actor, "id" => id} = data) do
163 object_id = case object_id do
167 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
168 {:ok, object} <- get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
169 {:ok, activity} <- ActivityPub.delete(object, false) do
180 def handle_incoming(_), do: :error
182 def get_obj_helper(id) do
183 if object = Object.get_by_ap_id(id), do: {:ok, object}, else: nil
186 def prepare_object(object) do
193 |> prepare_attachments
201 def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
205 |> Map.put("object", object)
206 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
211 def prepare_outgoing(%{"type" => type} = data) do
213 |> maybe_fix_object_url
214 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
219 def maybe_fix_object_url(data) do
220 if is_binary(data["object"]) and not String.starts_with?(data["object"], "http") do
221 case ActivityPub.fetch_object_from_id(data["object"]) do
222 {:ok, relative_object} ->
223 if relative_object.data["external_url"] do
225 |> Map.put("object", relative_object.data["external_url"])
230 Logger.error("Couldn't fetch #{data["object"]} #{inspect(e)}")
238 def add_hashtags(object) do
239 tags = (object["tag"] || [])
240 |> Enum.map fn (tag) -> %{"href" => Pleroma.Web.Endpoint.url() <> "/tags/#{tag}", "name" => "##{tag}", "type" => "Hashtag"} end
243 |> Map.put("tag", tags)
246 def add_mention_tags(object) do
247 recipients = object["to"] ++ (object["cc"] || [])
248 mentions = recipients
249 |> Enum.map(fn (ap_id) -> User.get_cached_by_ap_id(ap_id) end)
250 |> Enum.filter(&(&1))
251 |> Enum.map(fn(user) -> %{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"} end)
253 tags = object["tag"] || []
256 |> Map.put("tag", tags ++ mentions)
259 # TODO: we should probably send mtime instead of unix epoch time for updated
260 def add_emoji_tags(object) do
261 tags = object["tag"] || []
262 emoji = object["emoji"] || []
263 out = emoji |> Enum.map(fn {name, url} ->
264 %{"icon" => %{"url" => url, "type" => "Image"},
265 "name" => ":" <> name <> ":",
267 "updated" => "1970-01-01T00:00:00Z",
272 |> Map.put("tag", tags ++ out)
275 def set_conversation(object) do
276 Map.put(object, "conversation", object["context"])
279 def set_sensitive(object) do
280 tags = object["tag"] || []
281 Map.put(object, "sensitive", "nsfw" in tags)
284 def add_attributed_to(object) do
285 attributedTo = object["attributedTo"] || object["actor"]
288 |> Map.put("attributedTo", attributedTo)
291 def prepare_attachments(object) do
292 attachments = (object["attachment"] || [])
293 |> Enum.map(fn (data) ->
294 [%{"mediaType" => media_type, "href" => href} | _] = data["url"]
295 %{"url" => href, "mediaType" => media_type, "name" => data["name"], "type" => "Document"}
299 |> Map.put("attachment", attachments)
302 defp user_upgrade_task(user) do
303 old_follower_address = User.ap_followers(user)
305 where: ^old_follower_address in u.following,
306 update: [set: [following: fragment("array_replace(?,?,?)", u.following, ^old_follower_address, ^user.follower_address)]]
307 Repo.update_all(q, [])
309 maybe_retire_websub(user.ap_id)
311 # Only do this for recent activties, don't go through the whole db.
312 # Only look at the last 1000 activities.
313 since = (Repo.aggregate(Activity, :max, :id) || 0) - 1_000
314 q = from a in Activity,
315 where: ^old_follower_address in a.recipients,
316 where: a.id > ^since,
317 update: [set: [recipients: fragment("array_replace(?,?,?)", a.recipients, ^old_follower_address, ^user.follower_address)]]
318 Repo.update_all(q, [])
321 def upgrade_user_from_ap_id(ap_id, async \\ true) do
322 with %User{local: false} = user <- User.get_by_ap_id(ap_id),
323 {:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id) do
325 |> Map.put(:info, Map.merge(user.info, data[:info]))
327 already_ap = User.ap_enabled?(user)
328 {:ok, user} = User.upgrade_changeset(user, data)
332 # This could potentially take a long time, do it in the background
335 user_upgrade_task(user)
338 user_upgrade_task(user)
348 def maybe_retire_websub(ap_id) do
350 if is_binary(ap_id) && (String.length(ap_id) > 8) do
351 q = from ws in Pleroma.Web.Websub.WebsubClientSubscription,
352 where: fragment("? like ?", ws.topic, ^"#{ap_id}%")