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" => "Note"} = object} = data) do
126 with nil <- Activity.get_create_activity_by_object_ap_id(object["id"]),
127 %User{} = user <- User.get_or_fetch_by_ap_id(data["actor"]) do
128 object = fix_object(data["object"])
134 context: object["conversation"],
136 published: data["published"],
144 ActivityPub.create(params)
146 %Activity{} = activity -> {:ok, activity}
152 %{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = data
154 with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
155 %User{} = follower <- User.get_or_fetch_by_ap_id(follower),
156 {:ok, activity} <- ActivityPub.follow(follower, followed, id, false) do
157 if not User.locked?(followed) do
158 ActivityPub.accept(%{
159 to: [follower.ap_id],
160 actor: followed.ap_id,
165 User.follow(follower, followed)
174 defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
175 with true <- id =~ "follows",
176 %User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
177 %Activity{} = activity <- Utils.fetch_latest_follow(follower, followed) do
184 defp mastodon_follow_hack(_), do: {:error, nil}
186 defp get_follow_activity(follow_object, followed) do
187 with object_id when not is_nil(object_id) <- Utils.get_ap_id(follow_object),
188 {_, %Activity{} = activity} <- {:activity, Activity.get_by_ap_id(object_id)} do
191 # Can't find the activity. This might a Mastodon 2.3 "Accept"
193 mastodon_follow_hack(follow_object, followed)
201 %{"type" => "Accept", "object" => follow_object, "actor" => actor, "id" => id} = data
203 with %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
204 {:ok, follow_activity} <- get_follow_activity(follow_object, followed),
205 %User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
207 ActivityPub.accept(%{
208 to: follow_activity.data["to"],
210 actor: followed.ap_id,
211 object: follow_activity.data["id"],
214 if not User.following?(follower, followed) do
215 {:ok, follower} = User.follow(follower, followed)
225 %{"type" => "Reject", "object" => follow_object, "actor" => actor, "id" => id} = data
227 with %User{} = followed <- User.get_or_fetch_by_ap_id(actor),
228 {:ok, follow_activity} <- get_follow_activity(follow_object, followed),
229 %User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
231 ActivityPub.accept(%{
232 to: follow_activity.data["to"],
234 actor: followed.ap_id,
235 object: follow_activity.data["id"],
238 User.unfollow(follower, followed)
247 %{"type" => "Like", "object" => object_id, "actor" => actor, "id" => id} = _data
249 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
251 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
252 {:ok, activity, _object} <- ActivityPub.like(actor, object, id, false) do
260 %{"type" => "Announce", "object" => object_id, "actor" => actor, "id" => id} = _data
262 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
264 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
265 {:ok, activity, _object} <- ActivityPub.announce(actor, object, id, false) do
273 %{"type" => "Update", "object" => %{"type" => "Person"} = object, "actor" => actor_id} =
276 with %User{ap_id: ^actor_id} = actor <- User.get_by_ap_id(object["id"]) do
277 {:ok, new_user_data} = ActivityPub.user_data_from_user_object(object)
279 banner = new_user_data[:info]["banner"]
280 locked = new_user_data[:info]["locked"] || false
284 |> Map.take([:name, :bio, :avatar])
285 |> Map.put(:info, Map.merge(actor.info, %{"banner" => banner, "locked" => locked}))
288 |> User.upgrade_changeset(update_data)
289 |> User.update_and_set_cache()
291 ActivityPub.update(%{
293 to: data["to"] || [],
294 cc: data["cc"] || [],
307 %{"type" => "Delete", "object" => object_id, "actor" => actor, "id" => _id} = _data
309 object_id = Utils.get_ap_id(object_id)
311 with %User{} = _actor <- User.get_or_fetch_by_ap_id(actor),
313 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
314 {:ok, activity} <- ActivityPub.delete(object, false) do
324 "object" => %{"type" => "Announce", "object" => object_id},
329 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
331 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
332 {:ok, activity, _} <- ActivityPub.unannounce(actor, object, id, false) do
342 "object" => %{"type" => "Follow", "object" => followed},
347 with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
348 %User{} = follower <- User.get_or_fetch_by_ap_id(follower),
349 {:ok, activity} <- ActivityPub.unfollow(follower, followed, id, false) do
350 User.unfollow(follower, followed)
357 @ap_config Application.get_env(:pleroma, :activitypub)
358 @accept_blocks Keyword.get(@ap_config, :accept_blocks)
363 "object" => %{"type" => "Block", "object" => blocked},
368 with true <- @accept_blocks,
369 %User{local: true} = blocked <- User.get_cached_by_ap_id(blocked),
370 %User{} = blocker <- User.get_or_fetch_by_ap_id(blocker),
371 {:ok, activity} <- ActivityPub.unblock(blocker, blocked, id, false) do
372 User.unblock(blocker, blocked)
380 %{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = data
382 with true <- @accept_blocks,
383 %User{local: true} = blocked = User.get_cached_by_ap_id(blocked),
384 %User{} = blocker = User.get_or_fetch_by_ap_id(blocker),
385 {:ok, activity} <- ActivityPub.block(blocker, blocked, id, false) do
386 User.unfollow(blocker, blocked)
387 User.block(blocker, blocked)
397 "object" => %{"type" => "Like", "object" => object_id},
402 with %User{} = actor <- User.get_or_fetch_by_ap_id(actor),
404 get_obj_helper(object_id) || ActivityPub.fetch_object_from_id(object_id),
405 {:ok, activity, _, _} <- ActivityPub.unlike(actor, object, id, false) do
412 def handle_incoming(_), do: :error
414 def get_obj_helper(id) do
415 if object = Object.get_by_ap_id(id), do: {:ok, object}, else: nil
418 def set_reply_to_uri(%{"inReplyTo" => inReplyTo} = object) do
419 with false <- String.starts_with?(inReplyTo, "http"),
420 {:ok, %{data: replied_to_object}} <- get_obj_helper(inReplyTo) do
421 Map.put(object, "inReplyTo", replied_to_object["external_url"] || inReplyTo)
427 def set_reply_to_uri(obj), do: obj
429 # Prepares the object of an outgoing create activity.
430 def prepare_object(object) do
437 |> prepare_attachments
444 # internal -> Mastodon
447 def prepare_outgoing(%{"type" => "Create", "object" => %{"type" => "Note"} = object} = data) do
454 |> Map.put("object", object)
455 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
460 # Mastodon Accept/Reject requires a non-normalized object containing the actor URIs,
461 # because of course it does.
462 def prepare_outgoing(%{"type" => "Accept"} = data) do
464 if is_binary(data["object"]) do
470 with follow_activity <- Activity.get_by_ap_id(follow_activity_id) do
472 "actor" => follow_activity.actor,
473 "object" => follow_activity.data["object"],
474 "id" => follow_activity.data["id"],
480 |> Map.put("object", object)
481 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
487 def prepare_outgoing(%{"type" => "Reject"} = data) do
489 if is_binary(data["object"]) do
495 with follow_activity <- Activity.get_by_ap_id(follow_activity_id) do
497 "actor" => follow_activity.actor,
498 "object" => follow_activity.data["object"],
499 "id" => follow_activity.data["id"],
505 |> Map.put("object", object)
506 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
512 def prepare_outgoing(%{"type" => _type} = data) do
515 |> maybe_fix_object_url
516 |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
521 def maybe_fix_object_url(data) do
522 if is_binary(data["object"]) and not String.starts_with?(data["object"], "http") do
523 case ActivityPub.fetch_object_from_id(data["object"]) do
524 {:ok, relative_object} ->
525 if relative_object.data["external_url"] do
528 |> Map.put("object", relative_object.data["external_url"])
534 Logger.error("Couldn't fetch #{data["object"]} #{inspect(e)}")
542 def add_hashtags(object) do
544 (object["tag"] || [])
545 |> Enum.map(fn tag ->
547 "href" => Pleroma.Web.Endpoint.url() <> "/tags/#{tag}",
554 |> Map.put("tag", tags)
557 def add_mention_tags(object) do
558 recipients = object["to"] ++ (object["cc"] || [])
562 |> Enum.map(fn ap_id -> User.get_cached_by_ap_id(ap_id) end)
564 |> Enum.map(fn user ->
565 %{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"}
568 tags = object["tag"] || []
571 |> Map.put("tag", tags ++ mentions)
574 # TODO: we should probably send mtime instead of unix epoch time for updated
575 def add_emoji_tags(object) do
576 tags = object["tag"] || []
577 emoji = object["emoji"] || []
581 |> Enum.map(fn {name, url} ->
583 "icon" => %{"url" => url, "type" => "Image"},
584 "name" => ":" <> name <> ":",
586 "updated" => "1970-01-01T00:00:00Z",
592 |> Map.put("tag", tags ++ out)
595 def set_conversation(object) do
596 Map.put(object, "conversation", object["context"])
599 def set_sensitive(object) do
600 tags = object["tag"] || []
601 Map.put(object, "sensitive", "nsfw" in tags)
604 def add_attributed_to(object) do
605 attributedTo = object["attributedTo"] || object["actor"]
608 |> Map.put("attributedTo", attributedTo)
611 def prepare_attachments(object) do
613 (object["attachment"] || [])
614 |> Enum.map(fn data ->
615 [%{"mediaType" => media_type, "href" => href} | _] = data["url"]
616 %{"url" => href, "mediaType" => media_type, "name" => data["name"], "type" => "Document"}
620 |> Map.put("attachment", attachments)
623 defp user_upgrade_task(user) do
624 old_follower_address = User.ap_followers(user)
629 where: ^old_follower_address in u.following,
634 "array_replace(?,?,?)",
636 ^old_follower_address,
637 ^user.follower_address
643 Repo.update_all(q, [])
645 maybe_retire_websub(user.ap_id)
647 # Only do this for recent activties, don't go through the whole db.
648 # Only look at the last 1000 activities.
649 since = (Repo.aggregate(Activity, :max, :id) || 0) - 1_000
654 where: ^old_follower_address in a.recipients,
655 where: a.id > ^since,
660 "array_replace(?,?,?)",
662 ^old_follower_address,
663 ^user.follower_address
669 Repo.update_all(q, [])
672 def upgrade_user_from_ap_id(ap_id, async \\ true) do
673 with %User{local: false} = user <- User.get_by_ap_id(ap_id),
674 {:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id) do
677 |> Map.put(:info, Map.merge(user.info, data[:info]))
679 already_ap = User.ap_enabled?(user)
682 User.upgrade_changeset(user, data)
686 # This could potentially take a long time, do it in the background
689 user_upgrade_task(user)
692 user_upgrade_task(user)
702 def maybe_retire_websub(ap_id) do
704 if is_binary(ap_id) && String.length(ap_id) > 8 do
707 ws in Pleroma.Web.Websub.WebsubClientSubscription,
708 where: fragment("? like ?", ws.topic, ^"#{ap_id}%")
715 def maybe_fix_user_url(data) do
716 if is_map(data["url"]) do
717 Map.put(data, "url", data["url"]["href"])
723 def maybe_fix_user_object(data) do
725 |> maybe_fix_user_url