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"])
29 def fix_in_reply_to(%{"inReplyTo" => in_reply_to_id} = object)
30 when not is_nil(in_reply_to_id) do
31 case ActivityPub.fetch_object_from_id(in_reply_to_id) do
32 {:ok, replied_object} ->
33 with %Activity{} = activity <-
34 Activity.get_create_activity_by_object_ap_id(replied_object.data["id"]) do
36 |> Map.put("inReplyTo", replied_object.data["id"])
37 |> Map.put("inReplyToAtomUri", object["inReplyToAtomUri"] || in_reply_to_id)
38 |> Map.put("inReplyToStatusId", activity.id)
39 |> Map.put("conversation", replied_object.data["context"] || object["conversation"])
40 |> Map.put("context", replied_object.data["context"] || object["conversation"])
43 Logger.error("Couldn't fetch #{object["inReplyTo"]} #{inspect(e)}")
48 Logger.error("Couldn't fetch #{object["inReplyTo"]} #{inspect(e)}")
53 def fix_in_reply_to(object), do: object
55 def fix_context(object) do
57 |> Map.put("context", object["conversation"])
60 def fix_attachments(object) do
62 (object["attachment"] || [])
63 |> Enum.map(fn data ->
64 url = [%{"type" => "Link", "mediaType" => data["mediaType"], "href" => data["url"]}]
65 Map.put(data, "url", url)
69 |> Map.put("attachment", attachments)
72 def fix_emoji(object) do
73 tags = object["tag"] || []
74 emoji = tags |> Enum.filter(fn data -> data["type"] == "Emoji" and data["icon"] end)
78 |> Enum.reduce(%{}, fn data, mapping ->
82 if String.starts_with?(name, ":") do
83 name |> String.slice(1..-2)
88 mapping |> Map.put(name, data["icon"]["url"])
91 # we merge mastodon and pleroma emoji into a single mapping, to allow for both wire formats
92 emoji = Map.merge(object["emoji"] || %{}, emoji)
95 |> Map.put("emoji", emoji)
98 def fix_tag(object) do
100 (object["tag"] || [])
101 |> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
102 |> Enum.map(fn data -> String.slice(data["name"], 1..-1) end)
104 combined = (object["tag"] || []) ++ tags
107 |> Map.put("tag", combined)
110 # TODO: validate those with a Ecto scheme
113 def handle_incoming(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
114 with nil <- Activity.get_create_activity_by_object_ap_id(object["id"]),
115 %User{} = user <- User.get_or_fetch_by_ap_id(data["actor"]) do
116 object = fix_object(data["object"])
122 context: object["conversation"],
124 published: data["published"],
132 ActivityPub.create(params)
134 %Activity{} = activity -> {:ok, activity}
140 %{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = data
142 with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
143 %User{} = follower <- User.get_or_fetch_by_ap_id(follower),
144 {:ok, activity} <- ActivityPub.follow(follower, followed, id, false) do
145 if not User.locked?(followed) do
146 ActivityPub.accept(%{
147 to: [follower.ap_id],
148 actor: followed.ap_id,
153 User.follow(follower, followed)
162 defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
163 with true <- id =~ "follows",
164 %User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
165 %Activity{} = activity <- Utils.fetch_latest_follow(follower, followed) do
172 defp mastodon_follow_hack(_), do: {:error, nil}
174 defp get_follow_activity(follow_object, followed) do
175 with object_id when not is_nil(object_id) <- Utils.get_ap_id(follow_object),
176 {_, %Activity{} = activity} <- {:activity, Activity.get_by_ap_id(object_id)} do
179 # Can't find the activity. This might a Mastodon 2.3 "Accept"
181 mastodon_follow_hack(follow_object, followed)
189 %{"type" => "Accept", "object" => follow_object, "actor" => actor, "id" => id} = data
191 with %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
192 {:ok, follow_activity} <- get_follow_activity(follow_object, followed),
193 %User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
195 ActivityPub.accept(%{
196 to: follow_activity.data["to"],
198 actor: followed.ap_id,
199 object: follow_activity.data["id"],
202 if not User.following?(follower, followed) do
203 {:ok, follower} = User.follow(follower, followed)
213 %{"type" => "Reject", "object" => follow_object, "actor" => actor, "id" => id} = data
215 with %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
216 {:ok, follow_activity} <- get_follow_activity(follow_object, followed),
217 %User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
219 ActivityPub.accept(%{
220 to: follow_activity.data["to"],
222 actor: followed.ap_id,
223 object: follow_activity.data["id"],
226 User.unfollow(follower, followed)
235 %{"type" => "Like", "object" => object_id, "actor" => actor, "id" => id} = _data
237 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
239 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
240 {:ok, activity, _object} <- ActivityPub.like(actor, object, id, false) do
248 %{"type" => "Announce", "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.announce(actor, object, id, false) do
261 %{"type" => "Update", "object" => %{"type" => "Person"} = object, "actor" => actor_id} =
264 with %User{ap_id: ^actor_id} = actor <- User.get_by_ap_id(object["id"]) do
265 {:ok, new_user_data} = ActivityPub.user_data_from_user_object(object)
267 banner = new_user_data[:info]["banner"]
268 locked = new_user_data[:info]["locked"] || false
272 |> Map.take([:name, :bio, :avatar])
273 |> Map.put(:info, Map.merge(actor.info, %{"banner" => banner, "locked" => locked}))
276 |> User.upgrade_changeset(update_data)
277 |> User.update_and_set_cache()
279 ActivityPub.update(%{
281 to: data["to"] || [],
282 cc: data["cc"] || [],
295 %{"type" => "Delete", "object" => object_id, "actor" => actor, "id" => _id} = _data
297 object_id = Utils.get_ap_id(object_id)
299 with %User{} = _actor <- User.get_or_fetch_by_ap_id(actor),
301 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
302 {:ok, activity} <- ActivityPub.delete(object, false) do
312 "object" => %{"type" => "Announce", "object" => object_id},
317 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
319 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
320 {:ok, activity, _} <- ActivityPub.unannounce(actor, object, id, false) do
330 "object" => %{"type" => "Follow", "object" => followed},
335 with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
336 %User{} = follower <- User.get_or_fetch_by_ap_id(follower),
337 {:ok, activity} <- ActivityPub.unfollow(follower, followed, id, false) do
338 User.unfollow(follower, followed)
345 @ap_config Application.get_env(:pleroma, :activitypub)
346 @accept_blocks Keyword.get(@ap_config, :accept_blocks)
351 "object" => %{"type" => "Block", "object" => blocked},
356 with true <- @accept_blocks,
357 %User{local: true} = blocked <- User.get_cached_by_ap_id(blocked),
358 %User{} = blocker <- User.get_or_fetch_by_ap_id(blocker),
359 {:ok, activity} <- ActivityPub.unblock(blocker, blocked, id, false) do
360 User.unblock(blocker, blocked)
368 %{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = data
370 with true <- @accept_blocks,
371 %User{local: true} = blocked = User.get_cached_by_ap_id(blocked),
372 %User{} = blocker = User.get_or_fetch_by_ap_id(blocker),
373 {:ok, activity} <- ActivityPub.block(blocker, blocked, id, false) do
374 User.unfollow(blocker, blocked)
375 User.block(blocker, blocked)
385 "object" => %{"type" => "Like", "object" => object_id},
390 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
392 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
393 {:ok, activity, _, _} <- ActivityPub.unlike(actor, object, id, false) do
400 def handle_incoming(_), do: :error
402 def get_obj_helper(id) do
403 if object = Object.get_by_ap_id(id), do: {:ok, object}, else: nil
406 def set_reply_to_uri(%{"inReplyTo" => inReplyTo} = object) do
407 with false <- String.starts_with?(inReplyTo, "http"),
408 {:ok, %{data: replied_to_object}} <- get_obj_helper(inReplyTo) do
409 Map.put(object, "inReplyTo", replied_to_object["external_url"] || inReplyTo)
415 def set_reply_to_uri(obj), do: obj
417 # Prepares the object of an outgoing create activity.
418 def prepare_object(object) do
425 |> prepare_attachments
432 # internal -> Mastodon
435 def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
442 |> Map.put("object", object)
443 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
448 # Mastodon Accept/Reject requires a non-normalized object containing the actor URIs,
449 # because of course it does.
450 def prepare_outgoing(%{"type" => "Accept"} = data) do
452 if is_binary(data["object"]) do
458 with follow_activity <- Activity.get_by_ap_id(follow_activity_id) do
460 "actor" => follow_activity.actor,
461 "object" => follow_activity.data["object"],
462 "id" => follow_activity.data["id"],
468 |> Map.put("object", object)
469 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
475 def prepare_outgoing(%{"type" => "Reject"} = data) do
477 if is_binary(data["object"]) do
483 with follow_activity <- Activity.get_by_ap_id(follow_activity_id) do
485 "actor" => follow_activity.actor,
486 "object" => follow_activity.data["object"],
487 "id" => follow_activity.data["id"],
493 |> Map.put("object", object)
494 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
500 def prepare_outgoing(%{"type" => _type} = data) do
503 |> maybe_fix_object_url
504 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
509 def maybe_fix_object_url(data) do
510 if is_binary(data["object"]) and not String.starts_with?(data["object"], "http") do
511 case ActivityPub.fetch_object_from_id(data["object"]) do
512 {:ok, relative_object} ->
513 if relative_object.data["external_url"] do
516 |> Map.put("object", relative_object.data["external_url"])
522 Logger.error("Couldn't fetch #{data["object"]} #{inspect(e)}")
530 def add_hashtags(object) do
532 (object["tag"] || [])
533 |> Enum.map(fn tag ->
535 "href" => Pleroma.Web.Endpoint.url() <> "/tags/#{tag}",
542 |> Map.put("tag", tags)
545 def add_mention_tags(object) do
546 recipients = object["to"] ++ (object["cc"] || [])
550 |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
552 |> Enum.map(fn user ->
553 %{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"}
556 tags = object["tag"] || []
559 |> Map.put("tag", tags ++ mentions)
562 # TODO: we should probably send mtime instead of unix epoch time for updated
563 def add_emoji_tags(object) do
564 tags = object["tag"] || []
565 emoji = object["emoji"] || []
569 |> Enum.map(fn {name, url} ->
571 "icon" => %{"url" => url, "type" => "Image"},
572 "name" => ":" <> name <> ":",
574 "updated" => "1970-01-01T00:00:00Z",
580 |> Map.put("tag", tags ++ out)
583 def set_conversation(object) do
584 Map.put(object, "conversation", object["context"])
587 def set_sensitive(object) do
588 tags = object["tag"] || []
589 Map.put(object, "sensitive", "nsfw" in tags)
592 def add_attributed_to(object) do
593 attributedTo = object["attributedTo"] || object["actor"]
596 |> Map.put("attributedTo", attributedTo)
599 def prepare_attachments(object) do
601 (object["attachment"] || [])
602 |> Enum.map(fn data ->
603 [%{"mediaType" => media_type, "href" => href} | _] = data["url"]
604 %{"url" => href, "mediaType" => media_type, "name" => data["name"], "type" => "Document"}
608 |> Map.put("attachment", attachments)
611 defp user_upgrade_task(user) do
612 old_follower_address = User.ap_followers(user)
617 where: ^old_follower_address in u.following,
622 "array_replace(?,?,?)",
624 ^old_follower_address,
625 ^user.follower_address
631 Repo.update_all(q, [])
633 maybe_retire_websub(user.ap_id)
635 # Only do this for recent activties, don't go through the whole db.
636 # Only look at the last 1000 activities.
637 since = (Repo.aggregate(Activity, :max, :id) || 0) - 1_000
642 where: ^old_follower_address in a.recipients,
643 where: a.id > ^since,
648 "array_replace(?,?,?)",
650 ^old_follower_address,
651 ^user.follower_address
657 Repo.update_all(q, [])
660 def upgrade_user_from_ap_id(ap_id, async \\ true) do
661 with %User{local: false} = user <- User.get_by_ap_id(ap_id),
662 {:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id) do
665 |> Map.put(:info, Map.merge(user.info, data[:info]))
667 already_ap = User.ap_enabled?(user)
670 User.upgrade_changeset(user, data)
674 # This could potentially take a long time, do it in the background
677 user_upgrade_task(user)
680 user_upgrade_task(user)
690 def maybe_retire_websub(ap_id) do
692 if is_binary(ap_id) && String.length(ap_id) > 8 do
695 ws in Pleroma.Web.Websub.WebsubClientSubscription,
696 where: fragment("? like ?", ws.topic, ^"#{ap_id}%")
703 def maybe_fix_user_url(data) do
704 if is_map(data["url"]) do
705 Map.put(data, "url", data["url"]["href"])
711 def maybe_fix_user_object(data) do
713 |> maybe_fix_user_url