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
16 def get_actor(%{"actor" => actor}) when is_binary(actor) do
20 def get_actor(%{"actor" => actor}) when is_list(actor) do
21 if is_binary(Enum.at(actor, 0)) do
24 Enum.find(actor, fn %{"type" => type} -> type == "Person" end)
29 def get_actor(%{"actor" => actor}) when is_map(actor) do
34 Modifies an incoming AP object (mastodon format) to our internal format.
36 def fix_object(object) do
49 def fix_addressing_list(map, field) do
50 if is_binary(map[field]) do
52 |> Map.put(field, [map[field]])
58 def fix_addressing(map) do
60 |> fix_addressing_list("to")
61 |> fix_addressing_list("cc")
62 |> fix_addressing_list("bto")
63 |> fix_addressing_list("bcc")
66 def fix_actor(%{"attributedTo" => actor} = object) do
68 |> Map.put("actor", get_actor(%{"actor" => actor}))
71 def fix_likes(%{"likes" => likes} = object)
72 when is_bitstring(likes) do
73 # Check for standardisation
74 # This is what Peertube does
75 # curl -H 'Accept: application/activity+json' $likes | jq .totalItems
77 |> Map.put("likes", [])
78 |> Map.put("like_count", 0)
81 def fix_likes(object) do
85 def fix_in_reply_to(%{"inReplyTo" => in_reply_to_id} = object)
86 when not is_nil(in_reply_to_id) do
87 case ActivityPub.fetch_object_from_id(in_reply_to_id) do
88 {:ok, replied_object} ->
89 with %Activity{} = activity <-
90 Activity.get_create_activity_by_object_ap_id(replied_object.data["id"]) do
92 |> Map.put("inReplyTo", replied_object.data["id"])
93 |> Map.put("inReplyToAtomUri", object["inReplyToAtomUri"] || in_reply_to_id)
94 |> Map.put("inReplyToStatusId", activity.id)
95 |> Map.put("conversation", replied_object.data["context"] || object["conversation"])
96 |> Map.put("context", replied_object.data["context"] || object["conversation"])
99 Logger.error("Couldn't fetch #{object["inReplyTo"]} #{inspect(e)}")
104 Logger.error("Couldn't fetch #{object["inReplyTo"]} #{inspect(e)}")
109 def fix_in_reply_to(object), do: object
111 def fix_context(object) do
112 context = object["context"] || object["conversation"] || Utils.generate_context_id()
115 |> Map.put("context", context)
116 |> Map.put("conversation", context)
119 def fix_attachments(object) do
121 (object["attachment"] || [])
122 |> Enum.map(fn data ->
123 url = [%{"type" => "Link", "mediaType" => data["mediaType"], "href" => data["url"]}]
124 Map.put(data, "url", url)
128 |> Map.put("attachment", attachments)
131 def fix_emoji(object) do
132 tags = object["tag"] || []
133 emoji = tags |> Enum.filter(fn data -> data["type"] == "Emoji" and data["icon"] end)
137 |> Enum.reduce(%{}, fn data, mapping ->
141 if String.starts_with?(name, ":") do
142 name |> String.slice(1..-2)
147 mapping |> Map.put(name, data["icon"]["url"])
150 # we merge mastodon and pleroma emoji into a single mapping, to allow for both wire formats
151 emoji = Map.merge(object["emoji"] || %{}, emoji)
154 |> Map.put("emoji", emoji)
157 def fix_tag(object) do
159 (object["tag"] || [])
160 |> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
161 |> Enum.map(fn data -> String.slice(data["name"], 1..-1) end)
163 combined = (object["tag"] || []) ++ tags
166 |> Map.put("tag", combined)
169 # content map usually only has one language so this will do for now.
170 def fix_content_map(%{"contentMap" => content_map} = object) do
171 content_groups = Map.to_list(content_map)
172 {_, content} = Enum.at(content_groups, 0)
175 |> Map.put("content", content)
178 def fix_content_map(object), do: object
180 # disallow objects with bogus IDs
181 def handle_incoming(%{"id" => nil}), do: :error
182 def handle_incoming(%{"id" => ""}), do: :error
183 # length of https:// = 8, should validate better, but good enough for now.
184 def handle_incoming(%{"id" => id}) when not (is_binary(id) and length(id) > 8), do: :error
186 # TODO: validate those with a Ecto scheme
189 def handle_incoming(%{"type" => "Create", "object" => %{"type" => objtype} = object} = data)
190 when objtype in ["Article", "Note", "Video"] do
191 actor = get_actor(data)
194 Map.put(data, "actor", actor)
197 with nil <- Activity.get_create_activity_by_object_ap_id(object["id"]),
198 %User{} = user <- User.get_or_fetch_by_ap_id(data["actor"]) do
199 object = fix_object(data["object"])
205 context: object["conversation"],
207 published: data["published"],
215 ActivityPub.create(params)
217 %Activity{} = activity -> {:ok, activity}
223 %{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = data
225 with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
226 %User{} = follower <- User.get_or_fetch_by_ap_id(follower),
227 {:ok, activity} <- ActivityPub.follow(follower, followed, id, false) do
228 if not User.locked?(followed) do
229 ActivityPub.accept(%{
230 to: [follower.ap_id],
231 actor: followed.ap_id,
236 User.follow(follower, followed)
245 defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
246 with true <- id =~ "follows",
247 %User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
248 %Activity{} = activity <- Utils.fetch_latest_follow(follower, followed) do
255 defp mastodon_follow_hack(_), do: {:error, nil}
257 defp get_follow_activity(follow_object, followed) do
258 with object_id when not is_nil(object_id) <- Utils.get_ap_id(follow_object),
259 {_, %Activity{} = activity} <- {:activity, Activity.get_by_ap_id(object_id)} do
262 # Can't find the activity. This might a Mastodon 2.3 "Accept"
264 mastodon_follow_hack(follow_object, followed)
272 %{"type" => "Accept", "object" => follow_object, "actor" => actor, "id" => id} = data
274 with %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
275 {:ok, follow_activity} <- get_follow_activity(follow_object, followed),
276 %User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
278 ActivityPub.accept(%{
279 to: follow_activity.data["to"],
281 actor: followed.ap_id,
282 object: follow_activity.data["id"],
285 if not User.following?(follower, followed) do
286 {:ok, follower} = User.follow(follower, followed)
296 %{"type" => "Reject", "object" => follow_object, "actor" => actor, "id" => id} = data
298 with %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
299 {:ok, follow_activity} <- get_follow_activity(follow_object, followed),
300 %User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
302 ActivityPub.accept(%{
303 to: follow_activity.data["to"],
305 actor: followed.ap_id,
306 object: follow_activity.data["id"],
309 User.unfollow(follower, followed)
318 %{"type" => "Like", "object" => object_id, "actor" => actor, "id" => id} = _data
320 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
322 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
323 {:ok, activity, _object} <- ActivityPub.like(actor, object, id, false) do
331 %{"type" => "Announce", "object" => object_id, "actor" => actor, "id" => id} = _data
333 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
335 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
336 {:ok, activity, _object} <- ActivityPub.announce(actor, object, id, false) do
344 %{"type" => "Update", "object" => %{"type" => "Person"} = object, "actor" => actor_id} =
347 with %User{ap_id: ^actor_id} = actor <- User.get_by_ap_id(object["id"]) do
348 {:ok, new_user_data} = ActivityPub.user_data_from_user_object(object)
350 banner = new_user_data[:info]["banner"]
351 locked = new_user_data[:info]["locked"] || false
355 |> Map.take([:name, :bio, :avatar])
356 |> Map.put(:info, Map.merge(actor.info, %{"banner" => banner, "locked" => locked}))
359 |> User.upgrade_changeset(update_data)
360 |> User.update_and_set_cache()
362 ActivityPub.update(%{
364 to: data["to"] || [],
365 cc: data["cc"] || [],
378 %{"type" => "Delete", "object" => object_id, "actor" => actor, "id" => _id} = _data
380 object_id = Utils.get_ap_id(object_id)
382 with %User{} = _actor <- User.get_or_fetch_by_ap_id(actor),
384 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
385 {:ok, activity} <- ActivityPub.delete(object, false) do
395 "object" => %{"type" => "Announce", "object" => object_id},
400 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
402 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
403 {:ok, activity, _} <- ActivityPub.unannounce(actor, object, id, false) do
413 "object" => %{"type" => "Follow", "object" => followed},
418 with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
419 %User{} = follower <- User.get_or_fetch_by_ap_id(follower),
420 {:ok, activity} <- ActivityPub.unfollow(follower, followed, id, false) do
421 User.unfollow(follower, followed)
428 @ap_config Application.get_env(:pleroma, :activitypub)
429 @accept_blocks Keyword.get(@ap_config, :accept_blocks)
434 "object" => %{"type" => "Block", "object" => blocked},
439 with true <- @accept_blocks,
440 %User{local: true} = blocked <- User.get_cached_by_ap_id(blocked),
441 %User{} = blocker <- User.get_or_fetch_by_ap_id(blocker),
442 {:ok, activity} <- ActivityPub.unblock(blocker, blocked, id, false) do
443 User.unblock(blocker, blocked)
451 %{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = data
453 with true <- @accept_blocks,
454 %User{local: true} = blocked = User.get_cached_by_ap_id(blocked),
455 %User{} = blocker = User.get_or_fetch_by_ap_id(blocker),
456 {:ok, activity} <- ActivityPub.block(blocker, blocked, id, false) do
457 User.unfollow(blocker, blocked)
458 User.block(blocker, blocked)
468 "object" => %{"type" => "Like", "object" => object_id},
473 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
475 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
476 {:ok, activity, _, _} <- ActivityPub.unlike(actor, object, id, false) do
483 def handle_incoming(_), do: :error
485 def get_obj_helper(id) do
486 if object = Object.normalize(id), do: {:ok, object}, else: nil
489 def set_reply_to_uri(%{"inReplyTo" => inReplyTo} = object) do
490 with false <- String.starts_with?(inReplyTo, "http"),
491 {:ok, %{data: replied_to_object}} <- get_obj_helper(inReplyTo) do
492 Map.put(object, "inReplyTo", replied_to_object["external_url"] || inReplyTo)
498 def set_reply_to_uri(obj), do: obj
500 # Prepares the object of an outgoing create activity.
501 def prepare_object(object) do
508 |> prepare_attachments
515 # internal -> Mastodon
518 def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
525 |> Map.put("object", object)
526 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
531 # Mastodon Accept/Reject requires a non-normalized object containing the actor URIs,
532 # because of course it does.
533 def prepare_outgoing(%{"type" => "Accept"} = data) do
534 with follow_activity <- Activity.normalize(data["object"]) do
536 "actor" => follow_activity.actor,
537 "object" => follow_activity.data["object"],
538 "id" => follow_activity.data["id"],
544 |> Map.put("object", object)
545 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
551 def prepare_outgoing(%{"type" => "Reject"} = data) do
552 with follow_activity <- Activity.normalize(data["object"]) do
554 "actor" => follow_activity.actor,
555 "object" => follow_activity.data["object"],
556 "id" => follow_activity.data["id"],
562 |> Map.put("object", object)
563 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
569 def prepare_outgoing(%{"type" => _type} = data) do
572 |> maybe_fix_object_url
573 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
578 def maybe_fix_object_url(data) do
579 if is_binary(data["object"]) and not String.starts_with?(data["object"], "http") do
580 case ActivityPub.fetch_object_from_id(data["object"]) do
581 {:ok, relative_object} ->
582 if relative_object.data["external_url"] do
585 |> Map.put("object", relative_object.data["external_url"])
591 Logger.error("Couldn't fetch #{data["object"]} #{inspect(e)}")
599 def add_hashtags(object) do
601 (object["tag"] || [])
602 |> Enum.map(fn tag ->
604 "href" => Pleroma.Web.Endpoint.url() <> "/tags/#{tag}",
611 |> Map.put("tag", tags)
614 def add_mention_tags(object) do
615 recipients = object["to"] ++ (object["cc"] || [])
619 |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
621 |> Enum.map(fn user ->
622 %{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"}
625 tags = object["tag"] || []
628 |> Map.put("tag", tags ++ mentions)
631 # TODO: we should probably send mtime instead of unix epoch time for updated
632 def add_emoji_tags(object) do
633 tags = object["tag"] || []
634 emoji = object["emoji"] || []
638 |> Enum.map(fn {name, url} ->
640 "icon" => %{"url" => url, "type" => "Image"},
641 "name" => ":" <> name <> ":",
643 "updated" => "1970-01-01T00:00:00Z",
649 |> Map.put("tag", tags ++ out)
652 def set_conversation(object) do
653 Map.put(object, "conversation", object["context"])
656 def set_sensitive(object) do
657 tags = object["tag"] || []
658 Map.put(object, "sensitive", "nsfw" in tags)
661 def add_attributed_to(object) do
662 attributedTo = object["attributedTo"] || object["actor"]
665 |> Map.put("attributedTo", attributedTo)
668 def prepare_attachments(object) do
670 (object["attachment"] || [])
671 |> Enum.map(fn data ->
672 [%{"mediaType" => media_type, "href" => href} | _] = data["url"]
673 %{"url" => href, "mediaType" => media_type, "name" => data["name"], "type" => "Document"}
677 |> Map.put("attachment", attachments)
680 defp user_upgrade_task(user) do
681 old_follower_address = User.ap_followers(user)
686 where: ^old_follower_address in u.following,
691 "array_replace(?,?,?)",
693 ^old_follower_address,
694 ^user.follower_address
700 Repo.update_all(q, [])
702 maybe_retire_websub(user.ap_id)
704 # Only do this for recent activties, don't go through the whole db.
705 # Only look at the last 1000 activities.
706 since = (Repo.aggregate(Activity, :max, :id) || 0) - 1_000
711 where: ^old_follower_address in a.recipients,
712 where: a.id > ^since,
717 "array_replace(?,?,?)",
719 ^old_follower_address,
720 ^user.follower_address
726 Repo.update_all(q, [])
729 def upgrade_user_from_ap_id(ap_id, async \\ true) do
730 with %User{local: false} = user <- User.get_by_ap_id(ap_id),
731 {:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id) do
734 |> Map.put(:info, Map.merge(user.info, data[:info]))
736 already_ap = User.ap_enabled?(user)
739 User.upgrade_changeset(user, data)
743 # This could potentially take a long time, do it in the background
746 user_upgrade_task(user)
749 user_upgrade_task(user)
759 def maybe_retire_websub(ap_id) do
761 if is_binary(ap_id) && String.length(ap_id) > 8 do
764 ws in Pleroma.Web.Websub.WebsubClientSubscription,
765 where: fragment("? like ?", ws.topic, ^"#{ap_id}%")
772 def maybe_fix_user_url(data) do
773 if is_map(data["url"]) do
774 Map.put(data, "url", data["url"]["href"])
780 def maybe_fix_user_object(data) do
782 |> maybe_fix_user_url