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
10 alias Pleroma.Web.ActivityPub.Utils
17 Modifies an incoming AP object (mastodon format) to our internal format.
19 def fix_object(object) do
21 |> Map.put("actor", object["attributedTo"])
30 def fix_in_reply_to(%{"inReplyTo" => in_reply_to_id} = object)
31 when not is_nil(in_reply_to_id) do
32 case ActivityPub.fetch_object_from_id(in_reply_to_id) do
33 {:ok, replied_object} ->
34 with %Activity{} = activity <-
35 Activity.get_create_activity_by_object_ap_id(replied_object.data["id"]) do
37 |> Map.put("inReplyTo", replied_object.data["id"])
38 |> Map.put("inReplyToAtomUri", object["inReplyToAtomUri"] || in_reply_to_id)
39 |> Map.put("inReplyToStatusId", activity.id)
40 |> Map.put("conversation", replied_object.data["context"] || object["conversation"])
41 |> Map.put("context", replied_object.data["context"] || object["conversation"])
44 Logger.error("Couldn't fetch #{object["inReplyTo"]} #{inspect(e)}")
49 Logger.error("Couldn't fetch #{object["inReplyTo"]} #{inspect(e)}")
54 def fix_in_reply_to(object), do: object
56 def fix_context(object) do
58 |> Map.put("context", object["conversation"])
61 def fix_attachments(object) do
63 (object["attachment"] || [])
64 |> Enum.map(fn data ->
65 url = [%{"type" => "Link", "mediaType" => data["mediaType"], "href" => data["url"]}]
66 Map.put(data, "url", url)
70 |> Map.put("attachment", attachments)
73 def fix_emoji(object) do
74 tags = object["tag"] || []
75 emoji = tags |> Enum.filter(fn data -> data["type"] == "Emoji" and data["icon"] end)
79 |> Enum.reduce(%{}, fn data, mapping ->
83 if String.starts_with?(name, ":") do
84 name |> String.slice(1..-2)
89 mapping |> Map.put(name, data["icon"]["url"])
92 # we merge mastodon and pleroma emoji into a single mapping, to allow for both wire formats
93 emoji = Map.merge(object["emoji"] || %{}, emoji)
96 |> Map.put("emoji", emoji)
99 def fix_tag(object) do
101 (object["tag"] || [])
102 |> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
103 |> Enum.map(fn data -> String.slice(data["name"], 1..-1) end)
105 combined = (object["tag"] || []) ++ tags
108 |> Map.put("tag", combined)
111 # content map usually only has one language so this will do for now.
112 def fix_content_map(%{"contentMap" => content_map} = object) do
113 content_groups = Map.to_list(content_map)
114 {_, content} = Enum.at(content_groups, 0)
117 |> Map.put("content", content)
120 def fix_content_map(object), do: object
122 # TODO: validate those with a Ecto scheme
125 def handle_incoming(%{"type" => "Create", "object" => %{"type" => objtype} = object} = data)
126 when objtype in ["Article", "Note"] do
127 with nil <- Activity.get_create_activity_by_object_ap_id(object["id"]),
128 %User{} = user <- User.get_or_fetch_by_ap_id(data["actor"]) do
129 object = fix_object(data["object"])
135 context: object["conversation"],
137 published: data["published"],
145 ActivityPub.create(params)
147 %Activity{} = activity -> {:ok, activity}
153 %{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = data
155 with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
156 %User{} = follower <- User.get_or_fetch_by_ap_id(follower),
157 {:ok, activity} <- ActivityPub.follow(follower, followed, id, false) do
158 if not User.locked?(followed) do
159 ActivityPub.accept(%{
160 to: [follower.ap_id],
161 actor: followed.ap_id,
166 User.follow(follower, followed)
175 defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
176 with true <- id =~ "follows",
177 %User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
178 %Activity{} = activity <- Utils.fetch_latest_follow(follower, followed) do
185 defp mastodon_follow_hack(_), do: {:error, nil}
187 defp get_follow_activity(follow_object, followed) do
188 with object_id when not is_nil(object_id) <- Utils.get_ap_id(follow_object),
189 {_, %Activity{} = activity} <- {:activity, Activity.get_by_ap_id(object_id)} do
192 # Can't find the activity. This might a Mastodon 2.3 "Accept"
194 mastodon_follow_hack(follow_object, followed)
202 %{"type" => "Accept", "object" => follow_object, "actor" => actor, "id" => id} = data
204 with %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
205 {:ok, follow_activity} <- get_follow_activity(follow_object, followed),
206 %User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
208 ActivityPub.accept(%{
209 to: follow_activity.data["to"],
211 actor: followed.ap_id,
212 object: follow_activity.data["id"],
215 if not User.following?(follower, followed) do
216 {:ok, follower} = User.follow(follower, followed)
226 %{"type" => "Reject", "object" => follow_object, "actor" => actor, "id" => id} = data
228 with %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
229 {:ok, follow_activity} <- get_follow_activity(follow_object, followed),
230 %User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
232 ActivityPub.accept(%{
233 to: follow_activity.data["to"],
235 actor: followed.ap_id,
236 object: follow_activity.data["id"],
239 User.unfollow(follower, followed)
248 %{"type" => "Like", "object" => object_id, "actor" => actor, "id" => id} = _data
250 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
252 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
253 {:ok, activity, _object} <- ActivityPub.like(actor, object, id, false) do
261 %{"type" => "Announce", "object" => object_id, "actor" => actor, "id" => id} = _data
263 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
265 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
266 {:ok, activity, _object} <- ActivityPub.announce(actor, object, id, false) do
274 %{"type" => "Update", "object" => %{"type" => "Person"} = object, "actor" => actor_id} =
277 with %User{ap_id: ^actor_id} = actor <- User.get_by_ap_id(object["id"]) do
278 {:ok, new_user_data} = ActivityPub.user_data_from_user_object(object)
280 banner = new_user_data[:info]["banner"]
281 locked = new_user_data[:info]["locked"] || false
285 |> Map.take([:name, :bio, :avatar])
286 |> Map.put(:info, Map.merge(actor.info, %{"banner" => banner, "locked" => locked}))
289 |> User.upgrade_changeset(update_data)
290 |> User.update_and_set_cache()
292 ActivityPub.update(%{
294 to: data["to"] || [],
295 cc: data["cc"] || [],
308 %{"type" => "Delete", "object" => object_id, "actor" => actor, "id" => _id} = _data
310 object_id = Utils.get_ap_id(object_id)
312 with %User{} = _actor <- User.get_or_fetch_by_ap_id(actor),
314 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
315 {:ok, activity} <- ActivityPub.delete(object, false) do
325 "object" => %{"type" => "Announce", "object" => object_id},
330 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
332 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
333 {:ok, activity, _} <- ActivityPub.unannounce(actor, object, id, false) do
343 "object" => %{"type" => "Follow", "object" => followed},
348 with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
349 %User{} = follower <- User.get_or_fetch_by_ap_id(follower),
350 {:ok, activity} <- ActivityPub.unfollow(follower, followed, id, false) do
351 User.unfollow(follower, followed)
358 @ap_config Application.get_env(:pleroma, :activitypub)
359 @accept_blocks Keyword.get(@ap_config, :accept_blocks)
364 "object" => %{"type" => "Block", "object" => blocked},
369 with true <- @accept_blocks,
370 %User{local: true} = blocked <- User.get_cached_by_ap_id(blocked),
371 %User{} = blocker <- User.get_or_fetch_by_ap_id(blocker),
372 {:ok, activity} <- ActivityPub.unblock(blocker, blocked, id, false) do
373 User.unblock(blocker, blocked)
381 %{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = data
383 with true <- @accept_blocks,
384 %User{local: true} = blocked = User.get_cached_by_ap_id(blocked),
385 %User{} = blocker = User.get_or_fetch_by_ap_id(blocker),
386 {:ok, activity} <- ActivityPub.block(blocker, blocked, id, false) do
387 User.unfollow(blocker, blocked)
388 User.block(blocker, blocked)
398 "object" => %{"type" => "Like", "object" => object_id},
403 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
405 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
406 {:ok, activity, _, _} <- ActivityPub.unlike(actor, object, id, false) do
413 def handle_incoming(_), do: :error
415 def get_obj_helper(id) do
416 if object = Object.get_by_ap_id(id), do: {:ok, object}, else: nil
419 def set_reply_to_uri(%{"inReplyTo" => inReplyTo} = object) do
420 with false <- String.starts_with?(inReplyTo, "http"),
421 {:ok, %{data: replied_to_object}} <- get_obj_helper(inReplyTo) do
422 Map.put(object, "inReplyTo", replied_to_object["external_url"] || inReplyTo)
428 def set_reply_to_uri(obj), do: obj
430 # Prepares the object of an outgoing create activity.
431 def prepare_object(object) do
438 |> prepare_attachments
445 # internal -> Mastodon
448 def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
455 |> Map.put("object", object)
456 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
461 # Mastodon Accept/Reject requires a non-normalized object containing the actor URIs,
462 # because of course it does.
463 def prepare_outgoing(%{"type" => "Accept"} = data) do
465 if is_binary(data["object"]) do
471 with follow_activity <- Activity.get_by_ap_id(follow_activity_id) do
473 "actor" => follow_activity.actor,
474 "object" => follow_activity.data["object"],
475 "id" => follow_activity.data["id"],
481 |> Map.put("object", object)
482 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
488 def prepare_outgoing(%{"type" => "Reject"} = data) do
490 if is_binary(data["object"]) do
496 with follow_activity <- Activity.get_by_ap_id(follow_activity_id) do
498 "actor" => follow_activity.actor,
499 "object" => follow_activity.data["object"],
500 "id" => follow_activity.data["id"],
506 |> Map.put("object", object)
507 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
513 def prepare_outgoing(%{"type" => _type} = data) do
516 |> maybe_fix_object_url
517 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
522 def maybe_fix_object_url(data) do
523 if is_binary(data["object"]) and not String.starts_with?(data["object"], "http") do
524 case ActivityPub.fetch_object_from_id(data["object"]) do
525 {:ok, relative_object} ->
526 if relative_object.data["external_url"] do
529 |> Map.put("object", relative_object.data["external_url"])
535 Logger.error("Couldn't fetch #{data["object"]} #{inspect(e)}")
543 def add_hashtags(object) do
545 (object["tag"] || [])
546 |> Enum.map(fn tag ->
548 "href" => Pleroma.Web.Endpoint.url() <> "/tags/#{tag}",
555 |> Map.put("tag", tags)
558 def add_mention_tags(object) do
559 recipients = object["to"] ++ (object["cc"] || [])
563 |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
565 |> Enum.map(fn user ->
566 %{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"}
569 tags = object["tag"] || []
572 |> Map.put("tag", tags ++ mentions)
575 # TODO: we should probably send mtime instead of unix epoch time for updated
576 def add_emoji_tags(object) do
577 tags = object["tag"] || []
578 emoji = object["emoji"] || []
582 |> Enum.map(fn {name, url} ->
584 "icon" => %{"url" => url, "type" => "Image"},
585 "name" => ":" <> name <> ":",
587 "updated" => "1970-01-01T00:00:00Z",
593 |> Map.put("tag", tags ++ out)
596 def set_conversation(object) do
597 Map.put(object, "conversation", object["context"])
600 def set_sensitive(object) do
601 tags = object["tag"] || []
602 Map.put(object, "sensitive", "nsfw" in tags)
605 def add_attributed_to(object) do
606 attributedTo = object["attributedTo"] || object["actor"]
609 |> Map.put("attributedTo", attributedTo)
612 def prepare_attachments(object) do
614 (object["attachment"] || [])
615 |> Enum.map(fn data ->
616 [%{"mediaType" => media_type, "href" => href} | _] = data["url"]
617 %{"url" => href, "mediaType" => media_type, "name" => data["name"], "type" => "Document"}
621 |> Map.put("attachment", attachments)
624 defp user_upgrade_task(user) do
625 old_follower_address = User.ap_followers(user)
630 where: ^old_follower_address in u.following,
635 "array_replace(?,?,?)",
637 ^old_follower_address,
638 ^user.follower_address
644 Repo.update_all(q, [])
646 maybe_retire_websub(user.ap_id)
648 # Only do this for recent activties, don't go through the whole db.
649 # Only look at the last 1000 activities.
650 since = (Repo.aggregate(Activity, :max, :id) || 0) - 1_000
655 where: ^old_follower_address in a.recipients,
656 where: a.id > ^since,
661 "array_replace(?,?,?)",
663 ^old_follower_address,
664 ^user.follower_address
670 Repo.update_all(q, [])
673 def upgrade_user_from_ap_id(ap_id, async \\ true) do
674 with %User{local: false} = user <- User.get_by_ap_id(ap_id),
675 {:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id) do
678 |> Map.put(:info, Map.merge(user.info, data[:info]))
680 already_ap = User.ap_enabled?(user)
683 User.upgrade_changeset(user, data)
687 # This could potentially take a long time, do it in the background
690 user_upgrade_task(user)
693 user_upgrade_task(user)
703 def maybe_retire_websub(ap_id) do
705 if is_binary(ap_id) && String.length(ap_id) > 8 do
708 ws in Pleroma.Web.Websub.WebsubClientSubscription,
709 where: fragment("? like ?", ws.topic, ^"#{ap_id}%")
716 def maybe_fix_user_url(data) do
717 if is_map(data["url"]) do
718 Map.put(data, "url", data["url"]["href"])
724 def maybe_fix_user_object(data) do
726 |> maybe_fix_user_url