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[akkoma] / lib / pleroma / web / activity_pub / transmogrifier.ex
1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
4
5 defmodule Pleroma.Web.ActivityPub.Transmogrifier do
6 @moduledoc """
7 A module to handle coding from internal to wire ActivityPub and back.
8 """
9 alias Pleroma.Activity
10 alias Pleroma.Object
11 alias Pleroma.Object.Containment
12 alias Pleroma.Repo
13 alias Pleroma.User
14 alias Pleroma.Web.ActivityPub.ActivityPub
15 alias Pleroma.Web.ActivityPub.Utils
16 alias Pleroma.Web.ActivityPub.Visibility
17 alias Pleroma.Web.Federator
18 alias Pleroma.Workers.Transmogrifier, as: TransmogrifierWorker
19
20 import Ecto.Query
21
22 require Logger
23 require Pleroma.Constants
24
25 defdelegate worker_args(queue), to: Pleroma.Workers.Helper
26
27 @doc """
28 Modifies an incoming AP object (mastodon format) to our internal format.
29 """
30 def fix_object(object, options \\ []) do
31 object
32 |> strip_internal_fields
33 |> fix_actor
34 |> fix_url
35 |> fix_attachments
36 |> fix_context
37 |> fix_in_reply_to(options)
38 |> fix_emoji
39 |> fix_tag
40 |> fix_content_map
41 |> fix_addressing
42 |> fix_summary
43 |> fix_type(options)
44 end
45
46 def fix_summary(%{"summary" => nil} = object) do
47 object
48 |> Map.put("summary", "")
49 end
50
51 def fix_summary(%{"summary" => _} = object) do
52 # summary is present, nothing to do
53 object
54 end
55
56 def fix_summary(object) do
57 object
58 |> Map.put("summary", "")
59 end
60
61 def fix_addressing_list(map, field) do
62 cond do
63 is_binary(map[field]) ->
64 Map.put(map, field, [map[field]])
65
66 is_nil(map[field]) ->
67 Map.put(map, field, [])
68
69 true ->
70 map
71 end
72 end
73
74 def fix_explicit_addressing(
75 %{"to" => to, "cc" => cc} = object,
76 explicit_mentions,
77 follower_collection
78 ) do
79 explicit_to =
80 to
81 |> Enum.filter(fn x -> x in explicit_mentions end)
82
83 explicit_cc =
84 to
85 |> Enum.filter(fn x -> x not in explicit_mentions end)
86
87 final_cc =
88 (cc ++ explicit_cc)
89 |> Enum.reject(fn x -> String.ends_with?(x, "/followers") and x != follower_collection end)
90 |> Enum.uniq()
91
92 object
93 |> Map.put("to", explicit_to)
94 |> Map.put("cc", final_cc)
95 end
96
97 def fix_explicit_addressing(object, _explicit_mentions, _followers_collection), do: object
98
99 # if directMessage flag is set to true, leave the addressing alone
100 def fix_explicit_addressing(%{"directMessage" => true} = object), do: object
101
102 def fix_explicit_addressing(object) do
103 explicit_mentions =
104 object
105 |> Utils.determine_explicit_mentions()
106
107 follower_collection = User.get_cached_by_ap_id(Containment.get_actor(object)).follower_address
108
109 explicit_mentions = explicit_mentions ++ [Pleroma.Constants.as_public(), follower_collection]
110
111 fix_explicit_addressing(object, explicit_mentions, follower_collection)
112 end
113
114 # if as:Public is addressed, then make sure the followers collection is also addressed
115 # so that the activities will be delivered to local users.
116 def fix_implicit_addressing(%{"to" => to, "cc" => cc} = object, followers_collection) do
117 recipients = to ++ cc
118
119 if followers_collection not in recipients do
120 cond do
121 Pleroma.Constants.as_public() in cc ->
122 to = to ++ [followers_collection]
123 Map.put(object, "to", to)
124
125 Pleroma.Constants.as_public() in to ->
126 cc = cc ++ [followers_collection]
127 Map.put(object, "cc", cc)
128
129 true ->
130 object
131 end
132 else
133 object
134 end
135 end
136
137 def fix_implicit_addressing(object, _), do: object
138
139 def fix_addressing(object) do
140 {:ok, %User{} = user} = User.get_or_fetch_by_ap_id(object["actor"])
141 followers_collection = User.ap_followers(user)
142
143 object
144 |> fix_addressing_list("to")
145 |> fix_addressing_list("cc")
146 |> fix_addressing_list("bto")
147 |> fix_addressing_list("bcc")
148 |> fix_explicit_addressing()
149 |> fix_implicit_addressing(followers_collection)
150 end
151
152 def fix_actor(%{"attributedTo" => actor} = object) do
153 object
154 |> Map.put("actor", Containment.get_actor(%{"actor" => actor}))
155 end
156
157 def fix_in_reply_to(object, options \\ [])
158
159 def fix_in_reply_to(%{"inReplyTo" => in_reply_to} = object, options)
160 when not is_nil(in_reply_to) do
161 in_reply_to_id =
162 cond do
163 is_bitstring(in_reply_to) ->
164 in_reply_to
165
166 is_map(in_reply_to) && is_bitstring(in_reply_to["id"]) ->
167 in_reply_to["id"]
168
169 is_list(in_reply_to) && is_bitstring(Enum.at(in_reply_to, 0)) ->
170 Enum.at(in_reply_to, 0)
171
172 # Maybe I should output an error too?
173 true ->
174 ""
175 end
176
177 object = Map.put(object, "inReplyToAtomUri", in_reply_to_id)
178
179 if Federator.allowed_incoming_reply_depth?(options[:depth]) do
180 case get_obj_helper(in_reply_to_id, options) do
181 {:ok, replied_object} ->
182 with %Activity{} = _activity <-
183 Activity.get_create_by_object_ap_id(replied_object.data["id"]) do
184 object
185 |> Map.put("inReplyTo", replied_object.data["id"])
186 |> Map.put("inReplyToAtomUri", object["inReplyToAtomUri"] || in_reply_to_id)
187 |> Map.put("conversation", replied_object.data["context"] || object["conversation"])
188 |> Map.put("context", replied_object.data["context"] || object["conversation"])
189 else
190 e ->
191 Logger.error("Couldn't fetch \"#{inspect(in_reply_to_id)}\", error: #{inspect(e)}")
192 object
193 end
194
195 e ->
196 Logger.error("Couldn't fetch \"#{inspect(in_reply_to_id)}\", error: #{inspect(e)}")
197 object
198 end
199 else
200 object
201 end
202 end
203
204 def fix_in_reply_to(object, _options), do: object
205
206 def fix_context(object) do
207 context = object["context"] || object["conversation"] || Utils.generate_context_id()
208
209 object
210 |> Map.put("context", context)
211 |> Map.put("conversation", context)
212 end
213
214 def fix_attachments(%{"attachment" => attachment} = object) when is_list(attachment) do
215 attachments =
216 attachment
217 |> Enum.map(fn data ->
218 media_type = data["mediaType"] || data["mimeType"]
219 href = data["url"] || data["href"]
220
221 url = [%{"type" => "Link", "mediaType" => media_type, "href" => href}]
222
223 data
224 |> Map.put("mediaType", media_type)
225 |> Map.put("url", url)
226 end)
227
228 object
229 |> Map.put("attachment", attachments)
230 end
231
232 def fix_attachments(%{"attachment" => attachment} = object) when is_map(attachment) do
233 Map.put(object, "attachment", [attachment])
234 |> fix_attachments()
235 end
236
237 def fix_attachments(object), do: object
238
239 def fix_url(%{"url" => url} = object) when is_map(url) do
240 object
241 |> Map.put("url", url["href"])
242 end
243
244 def fix_url(%{"type" => "Video", "url" => url} = object) when is_list(url) do
245 first_element = Enum.at(url, 0)
246
247 link_element =
248 url
249 |> Enum.filter(fn x -> is_map(x) end)
250 |> Enum.filter(fn x -> x["mimeType"] == "text/html" end)
251 |> Enum.at(0)
252
253 object
254 |> Map.put("attachment", [first_element])
255 |> Map.put("url", link_element["href"])
256 end
257
258 def fix_url(%{"type" => object_type, "url" => url} = object)
259 when object_type != "Video" and is_list(url) do
260 first_element = Enum.at(url, 0)
261
262 url_string =
263 cond do
264 is_bitstring(first_element) -> first_element
265 is_map(first_element) -> first_element["href"] || ""
266 true -> ""
267 end
268
269 object
270 |> Map.put("url", url_string)
271 end
272
273 def fix_url(object), do: object
274
275 def fix_emoji(%{"tag" => tags} = object) when is_list(tags) do
276 emoji = tags |> Enum.filter(fn data -> data["type"] == "Emoji" and data["icon"] end)
277
278 emoji =
279 emoji
280 |> Enum.reduce(%{}, fn data, mapping ->
281 name = String.trim(data["name"], ":")
282
283 mapping |> Map.put(name, data["icon"]["url"])
284 end)
285
286 # we merge mastodon and pleroma emoji into a single mapping, to allow for both wire formats
287 emoji = Map.merge(object["emoji"] || %{}, emoji)
288
289 object
290 |> Map.put("emoji", emoji)
291 end
292
293 def fix_emoji(%{"tag" => %{"type" => "Emoji"} = tag} = object) do
294 name = String.trim(tag["name"], ":")
295 emoji = %{name => tag["icon"]["url"]}
296
297 object
298 |> Map.put("emoji", emoji)
299 end
300
301 def fix_emoji(object), do: object
302
303 def fix_tag(%{"tag" => tag} = object) when is_list(tag) do
304 tags =
305 tag
306 |> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
307 |> Enum.map(fn data -> String.slice(data["name"], 1..-1) end)
308
309 combined = tag ++ tags
310
311 object
312 |> Map.put("tag", combined)
313 end
314
315 def fix_tag(%{"tag" => %{"type" => "Hashtag", "name" => hashtag} = tag} = object) do
316 combined = [tag, String.slice(hashtag, 1..-1)]
317
318 object
319 |> Map.put("tag", combined)
320 end
321
322 def fix_tag(%{"tag" => %{} = tag} = object), do: Map.put(object, "tag", [tag])
323
324 def fix_tag(object), do: object
325
326 # content map usually only has one language so this will do for now.
327 def fix_content_map(%{"contentMap" => content_map} = object) do
328 content_groups = Map.to_list(content_map)
329 {_, content} = Enum.at(content_groups, 0)
330
331 object
332 |> Map.put("content", content)
333 end
334
335 def fix_content_map(object), do: object
336
337 def fix_type(object, options \\ [])
338
339 def fix_type(%{"inReplyTo" => reply_id, "name" => _} = object, options)
340 when is_binary(reply_id) do
341 reply =
342 with true <- Federator.allowed_incoming_reply_depth?(options[:depth]),
343 {:ok, object} <- get_obj_helper(reply_id, options) do
344 object
345 end
346
347 if reply && reply.data["type"] == "Question" do
348 Map.put(object, "type", "Answer")
349 else
350 object
351 end
352 end
353
354 def fix_type(object, _), do: object
355
356 defp mastodon_follow_hack(%{"id" => id, "actor" => follower_id}, followed) do
357 with true <- id =~ "follows",
358 %User{local: true} = follower <- User.get_cached_by_ap_id(follower_id),
359 %Activity{} = activity <- Utils.fetch_latest_follow(follower, followed) do
360 {:ok, activity}
361 else
362 _ -> {:error, nil}
363 end
364 end
365
366 defp mastodon_follow_hack(_, _), do: {:error, nil}
367
368 defp get_follow_activity(follow_object, followed) do
369 with object_id when not is_nil(object_id) <- Utils.get_ap_id(follow_object),
370 {_, %Activity{} = activity} <- {:activity, Activity.get_by_ap_id(object_id)} do
371 {:ok, activity}
372 else
373 # Can't find the activity. This might a Mastodon 2.3 "Accept"
374 {:activity, nil} ->
375 mastodon_follow_hack(follow_object, followed)
376
377 _ ->
378 {:error, nil}
379 end
380 end
381
382 def handle_incoming(data, options \\ [])
383
384 # Flag objects are placed ahead of the ID check because Mastodon 2.8 and earlier send them
385 # with nil ID.
386 def handle_incoming(%{"type" => "Flag", "object" => objects, "actor" => actor} = data, _options) do
387 with context <- data["context"] || Utils.generate_context_id(),
388 content <- data["content"] || "",
389 %User{} = actor <- User.get_cached_by_ap_id(actor),
390
391 # Reduce the object list to find the reported user.
392 %User{} = account <-
393 Enum.reduce_while(objects, nil, fn ap_id, _ ->
394 with %User{} = user <- User.get_cached_by_ap_id(ap_id) do
395 {:halt, user}
396 else
397 _ -> {:cont, nil}
398 end
399 end),
400
401 # Remove the reported user from the object list.
402 statuses <- Enum.filter(objects, fn ap_id -> ap_id != account.ap_id end) do
403 params = %{
404 actor: actor,
405 context: context,
406 account: account,
407 statuses: statuses,
408 content: content,
409 additional: %{
410 "cc" => [account.ap_id]
411 }
412 }
413
414 ActivityPub.flag(params)
415 end
416 end
417
418 # disallow objects with bogus IDs
419 def handle_incoming(%{"id" => nil}, _options), do: :error
420 def handle_incoming(%{"id" => ""}, _options), do: :error
421 # length of https:// = 8, should validate better, but good enough for now.
422 def handle_incoming(%{"id" => id}, _options) when not (is_binary(id) and length(id) > 8),
423 do: :error
424
425 # TODO: validate those with a Ecto scheme
426 # - tags
427 # - emoji
428 def handle_incoming(
429 %{"type" => "Create", "object" => %{"type" => objtype} = object} = data,
430 options
431 )
432 when objtype in ["Article", "Note", "Video", "Page", "Question", "Answer"] do
433 actor = Containment.get_actor(data)
434
435 data =
436 Map.put(data, "actor", actor)
437 |> fix_addressing
438
439 with nil <- Activity.get_create_by_object_ap_id(object["id"]),
440 {:ok, %User{} = user} <- User.get_or_fetch_by_ap_id(data["actor"]) do
441 options = Keyword.put(options, :depth, (options[:depth] || 0) + 1)
442 object = fix_object(data["object"], options)
443
444 params = %{
445 to: data["to"],
446 object: object,
447 actor: user,
448 context: object["conversation"],
449 local: false,
450 published: data["published"],
451 additional:
452 Map.take(data, [
453 "cc",
454 "directMessage",
455 "id"
456 ])
457 }
458
459 ActivityPub.create(params)
460 else
461 %Activity{} = activity -> {:ok, activity}
462 _e -> :error
463 end
464 end
465
466 def handle_incoming(
467 %{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = data,
468 _options
469 ) do
470 with %User{local: true} = followed <-
471 User.get_cached_by_ap_id(Containment.get_actor(%{"actor" => followed})),
472 {:ok, %User{} = follower} <-
473 User.get_or_fetch_by_ap_id(Containment.get_actor(%{"actor" => follower})),
474 {:ok, activity} <- ActivityPub.follow(follower, followed, id, false) do
475 with deny_follow_blocked <- Pleroma.Config.get([:user, :deny_follow_blocked]),
476 {_, false} <- {:user_blocked, User.blocks?(followed, follower) && deny_follow_blocked},
477 {_, false} <- {:user_locked, User.locked?(followed)},
478 {_, {:ok, follower}} <- {:follow, User.follow(follower, followed)},
479 {_, {:ok, _}} <-
480 {:follow_state_update, Utils.update_follow_state_for_all(activity, "accept")} do
481 ActivityPub.accept(%{
482 to: [follower.ap_id],
483 actor: followed,
484 object: data,
485 local: true
486 })
487 else
488 {:user_blocked, true} ->
489 {:ok, _} = Utils.update_follow_state_for_all(activity, "reject")
490
491 ActivityPub.reject(%{
492 to: [follower.ap_id],
493 actor: followed,
494 object: data,
495 local: true
496 })
497
498 {:follow, {:error, _}} ->
499 {:ok, _} = Utils.update_follow_state_for_all(activity, "reject")
500
501 ActivityPub.reject(%{
502 to: [follower.ap_id],
503 actor: followed,
504 object: data,
505 local: true
506 })
507
508 {:user_locked, true} ->
509 :noop
510 end
511
512 {:ok, activity}
513 else
514 _e ->
515 :error
516 end
517 end
518
519 def handle_incoming(
520 %{"type" => "Accept", "object" => follow_object, "actor" => _actor, "id" => _id} = data,
521 _options
522 ) do
523 with actor <- Containment.get_actor(data),
524 {:ok, %User{} = followed} <- User.get_or_fetch_by_ap_id(actor),
525 {:ok, follow_activity} <- get_follow_activity(follow_object, followed),
526 {:ok, follow_activity} <- Utils.update_follow_state_for_all(follow_activity, "accept"),
527 %User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
528 {:ok, _follower} = User.follow(follower, followed) do
529 ActivityPub.accept(%{
530 to: follow_activity.data["to"],
531 type: "Accept",
532 actor: followed,
533 object: follow_activity.data["id"],
534 local: false
535 })
536 else
537 _e -> :error
538 end
539 end
540
541 def handle_incoming(
542 %{"type" => "Reject", "object" => follow_object, "actor" => _actor, "id" => _id} = data,
543 _options
544 ) do
545 with actor <- Containment.get_actor(data),
546 {:ok, %User{} = followed} <- User.get_or_fetch_by_ap_id(actor),
547 {:ok, follow_activity} <- get_follow_activity(follow_object, followed),
548 {:ok, follow_activity} <- Utils.update_follow_state_for_all(follow_activity, "reject"),
549 %User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
550 {:ok, activity} <-
551 ActivityPub.reject(%{
552 to: follow_activity.data["to"],
553 type: "Reject",
554 actor: followed,
555 object: follow_activity.data["id"],
556 local: false
557 }) do
558 User.unfollow(follower, followed)
559
560 {:ok, activity}
561 else
562 _e -> :error
563 end
564 end
565
566 def handle_incoming(
567 %{"type" => "Like", "object" => object_id, "actor" => _actor, "id" => id} = data,
568 _options
569 ) do
570 with actor <- Containment.get_actor(data),
571 {:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
572 {:ok, object} <- get_obj_helper(object_id),
573 {:ok, activity, _object} <- ActivityPub.like(actor, object, id, false) do
574 {:ok, activity}
575 else
576 _e -> :error
577 end
578 end
579
580 def handle_incoming(
581 %{"type" => "Announce", "object" => object_id, "actor" => _actor, "id" => id} = data,
582 _options
583 ) do
584 with actor <- Containment.get_actor(data),
585 {:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
586 {:ok, object} <- get_obj_helper(object_id),
587 public <- Visibility.is_public?(data),
588 {:ok, activity, _object} <- ActivityPub.announce(actor, object, id, false, public) do
589 {:ok, activity}
590 else
591 _e -> :error
592 end
593 end
594
595 def handle_incoming(
596 %{"type" => "Update", "object" => %{"type" => object_type} = object, "actor" => actor_id} =
597 data,
598 _options
599 )
600 when object_type in ["Person", "Application", "Service", "Organization"] do
601 with %User{ap_id: ^actor_id} = actor <- User.get_cached_by_ap_id(object["id"]) do
602 {:ok, new_user_data} = ActivityPub.user_data_from_user_object(object)
603
604 banner = new_user_data[:info][:banner]
605 locked = new_user_data[:info][:locked] || false
606 attachment = get_in(new_user_data, [:info, :source_data, "attachment"]) || []
607
608 fields =
609 attachment
610 |> Enum.filter(fn %{"type" => t} -> t == "PropertyValue" end)
611 |> Enum.map(fn fields -> Map.take(fields, ["name", "value"]) end)
612
613 update_data =
614 new_user_data
615 |> Map.take([:name, :bio, :avatar])
616 |> Map.put(:info, %{banner: banner, locked: locked, fields: fields})
617
618 actor
619 |> User.upgrade_changeset(update_data, true)
620 |> User.update_and_set_cache()
621
622 ActivityPub.update(%{
623 local: false,
624 to: data["to"] || [],
625 cc: data["cc"] || [],
626 object: object,
627 actor: actor_id
628 })
629 else
630 e ->
631 Logger.error(e)
632 :error
633 end
634 end
635
636 # TODO: We presently assume that any actor on the same origin domain as the object being
637 # deleted has the rights to delete that object. A better way to validate whether or not
638 # the object should be deleted is to refetch the object URI, which should return either
639 # an error or a tombstone. This would allow us to verify that a deletion actually took
640 # place.
641 def handle_incoming(
642 %{"type" => "Delete", "object" => object_id, "actor" => actor, "id" => _id} = data,
643 _options
644 ) do
645 object_id = Utils.get_ap_id(object_id)
646
647 with actor <- Containment.get_actor(data),
648 {:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
649 {:ok, object} <- get_obj_helper(object_id),
650 :ok <- Containment.contain_origin(actor.ap_id, object.data),
651 {:ok, activity} <- ActivityPub.delete(object, false) do
652 {:ok, activity}
653 else
654 nil ->
655 case User.get_cached_by_ap_id(object_id) do
656 %User{ap_id: ^actor} = user ->
657 User.delete(user)
658
659 nil ->
660 :error
661 end
662
663 _e ->
664 :error
665 end
666 end
667
668 def handle_incoming(
669 %{
670 "type" => "Undo",
671 "object" => %{"type" => "Announce", "object" => object_id},
672 "actor" => _actor,
673 "id" => id
674 } = data,
675 _options
676 ) do
677 with actor <- Containment.get_actor(data),
678 {:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
679 {:ok, object} <- get_obj_helper(object_id),
680 {:ok, activity, _} <- ActivityPub.unannounce(actor, object, id, false) do
681 {:ok, activity}
682 else
683 _e -> :error
684 end
685 end
686
687 def handle_incoming(
688 %{
689 "type" => "Undo",
690 "object" => %{"type" => "Follow", "object" => followed},
691 "actor" => follower,
692 "id" => id
693 } = _data,
694 _options
695 ) do
696 with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
697 {:ok, %User{} = follower} <- User.get_or_fetch_by_ap_id(follower),
698 {:ok, activity} <- ActivityPub.unfollow(follower, followed, id, false) do
699 User.unfollow(follower, followed)
700 {:ok, activity}
701 else
702 _e -> :error
703 end
704 end
705
706 def handle_incoming(
707 %{
708 "type" => "Undo",
709 "object" => %{"type" => "Block", "object" => blocked},
710 "actor" => blocker,
711 "id" => id
712 } = _data,
713 _options
714 ) do
715 with %User{local: true} = blocked <- User.get_cached_by_ap_id(blocked),
716 {:ok, %User{} = blocker} <- User.get_or_fetch_by_ap_id(blocker),
717 {:ok, activity} <- ActivityPub.unblock(blocker, blocked, id, false) do
718 User.unblock(blocker, blocked)
719 {:ok, activity}
720 else
721 _e -> :error
722 end
723 end
724
725 def handle_incoming(
726 %{"type" => "Block", "object" => blocked, "actor" => blocker, "id" => id} = _data,
727 _options
728 ) do
729 with %User{local: true} = blocked = User.get_cached_by_ap_id(blocked),
730 {:ok, %User{} = blocker} = User.get_or_fetch_by_ap_id(blocker),
731 {:ok, activity} <- ActivityPub.block(blocker, blocked, id, false) do
732 User.unfollow(blocker, blocked)
733 User.block(blocker, blocked)
734 {:ok, activity}
735 else
736 _e -> :error
737 end
738 end
739
740 def handle_incoming(
741 %{
742 "type" => "Undo",
743 "object" => %{"type" => "Like", "object" => object_id},
744 "actor" => _actor,
745 "id" => id
746 } = data,
747 _options
748 ) do
749 with actor <- Containment.get_actor(data),
750 {:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
751 {:ok, object} <- get_obj_helper(object_id),
752 {:ok, activity, _, _} <- ActivityPub.unlike(actor, object, id, false) do
753 {:ok, activity}
754 else
755 _e -> :error
756 end
757 end
758
759 def handle_incoming(_, _), do: :error
760
761 def get_obj_helper(id, options \\ []) do
762 if object = Object.normalize(id, true, options), do: {:ok, object}, else: nil
763 end
764
765 def set_reply_to_uri(%{"inReplyTo" => in_reply_to} = object) when is_binary(in_reply_to) do
766 with false <- String.starts_with?(in_reply_to, "http"),
767 {:ok, %{data: replied_to_object}} <- get_obj_helper(in_reply_to) do
768 Map.put(object, "inReplyTo", replied_to_object["external_url"] || in_reply_to)
769 else
770 _e -> object
771 end
772 end
773
774 def set_reply_to_uri(obj), do: obj
775
776 # Prepares the object of an outgoing create activity.
777 def prepare_object(object) do
778 object
779 |> set_sensitive
780 |> add_hashtags
781 |> add_mention_tags
782 |> add_emoji_tags
783 |> add_attributed_to
784 |> prepare_attachments
785 |> set_conversation
786 |> set_reply_to_uri
787 |> strip_internal_fields
788 |> strip_internal_tags
789 |> set_type
790 end
791
792 # @doc
793 # """
794 # internal -> Mastodon
795 # """
796
797 def prepare_outgoing(%{"type" => "Create", "object" => object_id} = data) do
798 object =
799 object_id
800 |> Object.normalize()
801 |> Map.get(:data)
802 |> prepare_object
803
804 data =
805 data
806 |> Map.put("object", object)
807 |> Map.merge(Utils.make_json_ld_header())
808 |> Map.delete("bcc")
809
810 {:ok, data}
811 end
812
813 # Mastodon Accept/Reject requires a non-normalized object containing the actor URIs,
814 # because of course it does.
815 def prepare_outgoing(%{"type" => "Accept"} = data) do
816 with follow_activity <- Activity.normalize(data["object"]) do
817 object = %{
818 "actor" => follow_activity.actor,
819 "object" => follow_activity.data["object"],
820 "id" => follow_activity.data["id"],
821 "type" => "Follow"
822 }
823
824 data =
825 data
826 |> Map.put("object", object)
827 |> Map.merge(Utils.make_json_ld_header())
828
829 {:ok, data}
830 end
831 end
832
833 def prepare_outgoing(%{"type" => "Reject"} = data) do
834 with follow_activity <- Activity.normalize(data["object"]) do
835 object = %{
836 "actor" => follow_activity.actor,
837 "object" => follow_activity.data["object"],
838 "id" => follow_activity.data["id"],
839 "type" => "Follow"
840 }
841
842 data =
843 data
844 |> Map.put("object", object)
845 |> Map.merge(Utils.make_json_ld_header())
846
847 {:ok, data}
848 end
849 end
850
851 def prepare_outgoing(%{"type" => _type} = data) do
852 data =
853 data
854 |> strip_internal_fields
855 |> maybe_fix_object_url
856 |> Map.merge(Utils.make_json_ld_header())
857
858 {:ok, data}
859 end
860
861 def maybe_fix_object_url(data) do
862 if is_binary(data["object"]) and not String.starts_with?(data["object"], "http") do
863 case get_obj_helper(data["object"]) do
864 {:ok, relative_object} ->
865 if relative_object.data["external_url"] do
866 _data =
867 data
868 |> Map.put("object", relative_object.data["external_url"])
869 else
870 data
871 end
872
873 e ->
874 Logger.error("Couldn't fetch #{data["object"]} #{inspect(e)}")
875 data
876 end
877 else
878 data
879 end
880 end
881
882 def add_hashtags(object) do
883 tags =
884 (object["tag"] || [])
885 |> Enum.map(fn
886 # Expand internal representation tags into AS2 tags.
887 tag when is_binary(tag) ->
888 %{
889 "href" => Pleroma.Web.Endpoint.url() <> "/tags/#{tag}",
890 "name" => "##{tag}",
891 "type" => "Hashtag"
892 }
893
894 # Do not process tags which are already AS2 tag objects.
895 tag when is_map(tag) ->
896 tag
897 end)
898
899 object
900 |> Map.put("tag", tags)
901 end
902
903 def add_mention_tags(object) do
904 mentions =
905 object
906 |> Utils.get_notified_from_object()
907 |> Enum.map(fn user ->
908 %{"type" => "Mention", "href" => user.ap_id, "name" => "@#{user.nickname}"}
909 end)
910
911 tags = object["tag"] || []
912
913 object
914 |> Map.put("tag", tags ++ mentions)
915 end
916
917 def add_emoji_tags(%User{info: %{"emoji" => _emoji} = user_info} = object) do
918 user_info = add_emoji_tags(user_info)
919
920 object
921 |> Map.put(:info, user_info)
922 end
923
924 # TODO: we should probably send mtime instead of unix epoch time for updated
925 def add_emoji_tags(%{"emoji" => emoji} = object) do
926 tags = object["tag"] || []
927
928 out =
929 emoji
930 |> Enum.map(fn {name, url} ->
931 %{
932 "icon" => %{"url" => url, "type" => "Image"},
933 "name" => ":" <> name <> ":",
934 "type" => "Emoji",
935 "updated" => "1970-01-01T00:00:00Z",
936 "id" => url
937 }
938 end)
939
940 object
941 |> Map.put("tag", tags ++ out)
942 end
943
944 def add_emoji_tags(object) do
945 object
946 end
947
948 def set_conversation(object) do
949 Map.put(object, "conversation", object["context"])
950 end
951
952 def set_sensitive(object) do
953 tags = object["tag"] || []
954 Map.put(object, "sensitive", "nsfw" in tags)
955 end
956
957 def set_type(%{"type" => "Answer"} = object) do
958 Map.put(object, "type", "Note")
959 end
960
961 def set_type(object), do: object
962
963 def add_attributed_to(object) do
964 attributed_to = object["attributedTo"] || object["actor"]
965
966 object
967 |> Map.put("attributedTo", attributed_to)
968 end
969
970 def prepare_attachments(object) do
971 attachments =
972 (object["attachment"] || [])
973 |> Enum.map(fn data ->
974 [%{"mediaType" => media_type, "href" => href} | _] = data["url"]
975 %{"url" => href, "mediaType" => media_type, "name" => data["name"], "type" => "Document"}
976 end)
977
978 object
979 |> Map.put("attachment", attachments)
980 end
981
982 defp strip_internal_fields(object) do
983 object
984 |> Map.drop([
985 "likes",
986 "like_count",
987 "announcements",
988 "announcement_count",
989 "emoji",
990 "context_id",
991 "deleted_activity_id"
992 ])
993 end
994
995 defp strip_internal_tags(%{"tag" => tags} = object) do
996 tags =
997 tags
998 |> Enum.filter(fn x -> is_map(x) end)
999
1000 object
1001 |> Map.put("tag", tags)
1002 end
1003
1004 defp strip_internal_tags(object), do: object
1005
1006 def perform(:user_upgrade, user) do
1007 # we pass a fake user so that the followers collection is stripped away
1008 old_follower_address = User.ap_followers(%User{nickname: user.nickname})
1009
1010 q =
1011 from(
1012 u in User,
1013 where: ^old_follower_address in u.following,
1014 update: [
1015 set: [
1016 following:
1017 fragment(
1018 "array_replace(?,?,?)",
1019 u.following,
1020 ^old_follower_address,
1021 ^user.follower_address
1022 )
1023 ]
1024 ]
1025 )
1026
1027 Repo.update_all(q, [])
1028
1029 maybe_retire_websub(user.ap_id)
1030
1031 q =
1032 from(
1033 a in Activity,
1034 where: ^old_follower_address in a.recipients,
1035 update: [
1036 set: [
1037 recipients:
1038 fragment(
1039 "array_replace(?,?,?)",
1040 a.recipients,
1041 ^old_follower_address,
1042 ^user.follower_address
1043 )
1044 ]
1045 ]
1046 )
1047
1048 Repo.update_all(q, [])
1049 end
1050
1051 def upgrade_user_from_ap_id(ap_id) do
1052 with %User{local: false} = user <- User.get_cached_by_ap_id(ap_id),
1053 {:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id),
1054 already_ap <- User.ap_enabled?(user),
1055 {:ok, user} <- user |> User.upgrade_changeset(data) |> User.update_and_set_cache() do
1056 unless already_ap do
1057 %{"op" => "user_upgrade", "user_id" => user.id}
1058 |> TransmogrifierWorker.new(worker_args(:transmogrifier))
1059 |> Repo.insert()
1060 end
1061
1062 {:ok, user}
1063 else
1064 %User{} = user -> {:ok, user}
1065 e -> e
1066 end
1067 end
1068
1069 def maybe_retire_websub(ap_id) do
1070 # some sanity checks
1071 if is_binary(ap_id) && String.length(ap_id) > 8 do
1072 q =
1073 from(
1074 ws in Pleroma.Web.Websub.WebsubClientSubscription,
1075 where: fragment("? like ?", ws.topic, ^"#{ap_id}%")
1076 )
1077
1078 Repo.delete_all(q)
1079 end
1080 end
1081
1082 def maybe_fix_user_url(data) do
1083 if is_map(data["url"]) do
1084 Map.put(data, "url", data["url"]["href"])
1085 else
1086 data
1087 end
1088 end
1089
1090 def maybe_fix_user_object(data) do
1091 data
1092 |> maybe_fix_user_url
1093 end
1094 end
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