transmogrifier.ex 26.6 KB
Newer Older
1
# Pleroma: A lightweight social networking server
Haelwenn's avatar
Haelwenn committed
2
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
3
4
# SPDX-License-Identifier: AGPL-3.0-only

5
6
7
8
defmodule Pleroma.Web.ActivityPub.Transmogrifier do
  @moduledoc """
  A module to handle coding from internal to wire ActivityPub and back.
  """
Haelwenn's avatar
Haelwenn committed
9
  alias Pleroma.Activity
10
  alias Pleroma.EctoType.ActivityPub.ObjectValidators
11
  alias Pleroma.Maps
Haelwenn's avatar
Haelwenn committed
12
  alias Pleroma.Object
rinpatch's avatar
rinpatch committed
13
  alias Pleroma.Object.Containment
Haelwenn's avatar
Haelwenn committed
14
  alias Pleroma.Repo
15
  alias Pleroma.User
Haelwenn's avatar
Haelwenn committed
16
  alias Pleroma.Web.ActivityPub.ActivityPub
17
  alias Pleroma.Web.ActivityPub.Builder
18
19
  alias Pleroma.Web.ActivityPub.ObjectValidator
  alias Pleroma.Web.ActivityPub.Pipeline
Haelwenn's avatar
Haelwenn committed
20
  alias Pleroma.Web.ActivityPub.Utils
lain's avatar
lain committed
21
  alias Pleroma.Web.ActivityPub.Visibility
22
  alias Pleroma.Web.Federator
23
  alias Pleroma.Workers.TransmogrifierWorker
24

lain's avatar
lain committed
25
26
  import Ecto.Query

27
  require Logger
28
  require Pleroma.Constants
29

30
31
32
  @doc """
  Modifies an incoming AP object (mastodon format) to our internal format.
  """
33
  def fix_object(object, options \\ []) do
34
    object
35
36
37
38
39
    |> strip_internal_fields()
    |> fix_actor()
    |> fix_url()
    |> fix_attachments()
    |> fix_context()
40
    |> fix_in_reply_to(options)
41
42
43
44
45
    |> fix_emoji()
    |> fix_tag()
    |> fix_content_map()
    |> fix_addressing()
    |> fix_summary()
46
47
48
  end

  def fix_summary(%{"summary" => nil} = object) do
49
    Map.put(object, "summary", "")
50
51
52
53
54
55
56
  end

  def fix_summary(%{"summary" => _} = object) do
    # summary is present, nothing to do
    object
  end

57
  def fix_summary(object), do: Map.put(object, "summary", "")
58
59

  def fix_addressing_list(map, field) do
60
61
    addrs = map[field]

62
    cond do
63
64
      is_list(addrs) ->
        Map.put(map, field, Enum.filter(addrs, &is_binary/1))
65

66
67
      is_binary(addrs) ->
        Map.put(map, field, [addrs])
68
69

      true ->
70
        Map.put(map, field, [])
71
72
73
    end
  end

74
75
76
  # if directMessage flag is set to true, leave the addressing alone
  def fix_explicit_addressing(%{"directMessage" => true} = object, _follower_collection),
    do: object
77

78
79
80
81
82
83
  def fix_explicit_addressing(%{"to" => to, "cc" => cc} = object, follower_collection) do
    explicit_mentions =
      Utils.determine_explicit_mentions(object) ++
        [Pleroma.Constants.as_public(), follower_collection]

    explicit_to = Enum.filter(to, fn x -> x in explicit_mentions end)
84
    explicit_cc = Enum.filter(to, fn x -> x not in explicit_mentions end)
85
86
87

    final_cc =
      (cc ++ explicit_cc)
88
      |> Enum.filter(& &1)
89
      |> Enum.reject(fn x -> String.ends_with?(x, "/followers") and x != follower_collection end)
90
91
92
93
94
95
96
      |> Enum.uniq()

    object
    |> Map.put("to", explicit_to)
    |> Map.put("cc", final_cc)
  end

97
98
99
100
101
102
103
  # if as:Public is addressed, then make sure the followers collection is also addressed
  # so that the activities will be delivered to local users.
  def fix_implicit_addressing(%{"to" => to, "cc" => cc} = object, followers_collection) do
    recipients = to ++ cc

    if followers_collection not in recipients do
      cond do
104
        Pleroma.Constants.as_public() in cc ->
105
106
107
          to = to ++ [followers_collection]
          Map.put(object, "to", to)

108
        Pleroma.Constants.as_public() in to ->
109
110
111
112
113
114
          cc = cc ++ [followers_collection]
          Map.put(object, "cc", cc)

        true ->
          object
      end
115
    else
116
      object
117
118
119
    end
  end

120
  def fix_addressing(object) do
121
122
123
124
    {:ok, %User{follower_address: follower_collection}} =
      object
      |> Containment.get_actor()
      |> User.get_or_fetch_by_ap_id()
125

126
    object
127
128
129
130
    |> fix_addressing_list("to")
    |> fix_addressing_list("cc")
    |> fix_addressing_list("bto")
    |> fix_addressing_list("bcc")
131
132
    |> fix_explicit_addressing(follower_collection)
    |> fix_implicit_addressing(follower_collection)
lain's avatar
lain committed
133
134
  end

135
  def fix_actor(%{"attributedTo" => actor} = object) do
136
137
138
139
140
141
    actor = Containment.get_actor(%{"actor" => actor})

    # TODO: Remove actor field for Objects
    object
    |> Map.put("actor", actor)
    |> Map.put("attributedTo", actor)
142
143
  end

144
145
146
  def fix_in_reply_to(object, options \\ [])

  def fix_in_reply_to(%{"inReplyTo" => in_reply_to} = object, options)
147
      when not is_nil(in_reply_to) do
148
    in_reply_to_id = prepare_in_reply_to(in_reply_to)
149
    depth = (options[:depth] || 0) + 1
lain's avatar
lain committed
150

151
    if Federator.allowed_thread_distance?(depth) do
152
      with {:ok, replied_object} <- get_obj_helper(in_reply_to_id, options),
minibikini's avatar
minibikini committed
153
           %Activity{} <- Activity.get_create_by_object_ap_id(replied_object.data["id"]) do
154
155
156
        object
        |> Map.put("inReplyTo", replied_object.data["id"])
        |> Map.put("context", replied_object.data["context"] || object["conversation"])
157
        |> Map.drop(["conversation", "inReplyToAtomUri"])
158
      else
159
        e ->
160
          Logger.warn("Couldn't fetch #{inspect(in_reply_to_id)}, error: #{inspect(e)}")
161
162
163
164
          object
      end
    else
      object
lain's avatar
lain committed
165
166
    end
  end
lain's avatar
lain committed
167

168
  def fix_in_reply_to(object, _options), do: object
lain's avatar
lain committed
169

170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
  defp prepare_in_reply_to(in_reply_to) do
    cond do
      is_bitstring(in_reply_to) ->
        in_reply_to

      is_map(in_reply_to) && is_bitstring(in_reply_to["id"]) ->
        in_reply_to["id"]

      is_list(in_reply_to) && is_bitstring(Enum.at(in_reply_to, 0)) ->
        Enum.at(in_reply_to, 0)

      true ->
        ""
    end
  end

lain's avatar
lain committed
186
  def fix_context(object) do
Haelwenn's avatar
Haelwenn committed
187
188
    context = object["context"] || object["conversation"] || Utils.generate_context_id()

lain's avatar
lain committed
189
    object
Haelwenn's avatar
Haelwenn committed
190
    |> Map.put("context", context)
191
    |> Map.drop(["conversation"])
lain's avatar
lain committed
192
193
  end

194
  def fix_attachments(%{"attachment" => attachment} = object) when is_list(attachment) do
lain's avatar
lain committed
195
    attachments =
196
      Enum.map(attachment, fn data ->
197
198
199
200
201
202
203
204
205
        url =
          cond do
            is_list(data["url"]) -> List.first(data["url"])
            is_map(data["url"]) -> data["url"]
            true -> nil
          end

        media_type =
          cond do
206
207
208
209
210
211
212
213
214
215
216
            is_map(url) && MIME.extensions(url["mediaType"]) != [] ->
              url["mediaType"]

            is_bitstring(data["mediaType"]) && MIME.extensions(data["mediaType"]) != [] ->
              data["mediaType"]

            is_bitstring(data["mimeType"]) && MIME.extensions(data["mimeType"]) != [] ->
              data["mimeType"]

            true ->
              nil
217
218
219
220
221
222
223
          end

        href =
          cond do
            is_map(url) && is_binary(url["href"]) -> url["href"]
            is_binary(data["url"]) -> data["url"]
            is_binary(data["href"]) -> data["href"]
Haelwenn's avatar
Haelwenn committed
224
            true -> nil
225
226
          end

Haelwenn's avatar
Haelwenn committed
227
228
        if href do
          attachment_url =
Haelwenn's avatar
Haelwenn committed
229
230
231
232
            %{
              "href" => href,
              "type" => Map.get(url || %{}, "type", "Link")
            }
Haelwenn's avatar
Haelwenn committed
233
            |> Maps.put_if_present("mediaType", media_type)
234
235
            |> Maps.put_if_present("width", (url || %{})["width"] || data["width"])
            |> Maps.put_if_present("height", (url || %{})["height"] || data["height"])
236

Haelwenn's avatar
Haelwenn committed
237
238
239
240
          %{
            "url" => [attachment_url],
            "type" => data["type"] || "Document"
          }
Haelwenn's avatar
Haelwenn committed
241
242
          |> Maps.put_if_present("mediaType", media_type)
          |> Maps.put_if_present("name", data["name"])
243
          |> Maps.put_if_present("blurhash", data["blurhash"])
Haelwenn's avatar
Haelwenn committed
244
245
246
        else
          nil
        end
lain's avatar
lain committed
247
      end)
Haelwenn's avatar
Haelwenn committed
248
      |> Enum.filter(& &1)
lain's avatar
lain committed
249

250
    Map.put(object, "attachment", attachments)
251
252
  end

253
  def fix_attachments(%{"attachment" => attachment} = object) when is_map(attachment) do
Maksim's avatar
Maksim committed
254
255
256
    object
    |> Map.put("attachment", [attachment])
    |> fix_attachments()
257
258
  end

259
  def fix_attachments(object), do: object
260

261
  def fix_url(%{"url" => url} = object) when is_map(url) do
262
    Map.put(object, "url", url["href"])
263
264
  end

Haelwenn's avatar
Haelwenn committed
265
  def fix_url(%{"url" => url} = object) when is_list(url) do
266
267
268
269
270
271
272
273
274
    first_element = Enum.at(url, 0)

    url_string =
      cond do
        is_bitstring(first_element) -> first_element
        is_map(first_element) -> first_element["href"] || ""
        true -> ""
      end

275
    Map.put(object, "url", url_string)
276
277
278
279
  end

  def fix_url(object), do: object

280
  def fix_emoji(%{"tag" => tags} = object) when is_list(tags) do
lain's avatar
lain committed
281
    emoji =
282
      tags
283
      |> Enum.filter(fn data -> is_map(data) and data["type"] == "Emoji" and data["icon"] end)
lain's avatar
lain committed
284
      |> Enum.reduce(%{}, fn data, mapping ->
285
        name = String.trim(data["name"], ":")
lain's avatar
lain committed
286

287
        Map.put(mapping, name, data["icon"]["url"])
lain's avatar
lain committed
288
      end)
lain's avatar
lain committed
289

290
    Map.put(object, "emoji", emoji)
lain's avatar
lain committed
291
292
  end

293
294
295
296
  def fix_emoji(%{"tag" => %{"type" => "Emoji"} = tag} = object) do
    name = String.trim(tag["name"], ":")
    emoji = %{name => tag["icon"]["url"]}

297
    Map.put(object, "emoji", emoji)
298
299
  end

300
  def fix_emoji(object), do: object
301

302
  def fix_tag(%{"tag" => tag} = object) when is_list(tag) do
303
    tags =
304
      tag
lain's avatar
lain committed
305
      |> Enum.filter(fn data -> data["type"] == "Hashtag" and data["name"] end)
306
307
308
      |> Enum.map(fn
        %{"name" => "#" <> hashtag} -> String.downcase(hashtag)
        %{"name" => hashtag} -> String.downcase(hashtag)
309
      end)
310

311
    Map.put(object, "tag", tag ++ tags)
312
313
  end

314
315
316
317
  def fix_tag(%{"tag" => %{} = tag} = object) do
    object
    |> Map.put("tag", [tag])
    |> fix_tag
318
319
  end

320
  def fix_tag(object), do: object
321

322
323
324
325
326
  # content map usually only has one language so this will do for now.
  def fix_content_map(%{"contentMap" => content_map} = object) do
    content_groups = Map.to_list(content_map)
    {_, content} = Enum.at(content_groups, 0)

327
    Map.put(object, "content", content)
328
329
330
331
  end

  def fix_content_map(object), do: object

332
333
334
  defp fix_type(%{"type" => "Note", "inReplyTo" => reply_id, "name" => _} = object, options)
       when is_binary(reply_id) do
    options = Keyword.put(options, :fetch, true)
335

336
    with %Object{data: %{"type" => "Question"}} <- Object.normalize(reply_id, options) do
337
338
      Map.put(object, "type", "Answer")
    else
339
      _ -> object
340
341
342
    end
  end

343
  defp fix_type(object, _options), do: object
344

345
346
347
348
349
350
351
352
353
354
355
  # Reduce the object list to find the reported user.
  defp get_reported(objects) do
    Enum.reduce_while(objects, nil, fn ap_id, _ ->
      with %User{} = user <- User.get_cached_by_ap_id(ap_id) do
        {:halt, user}
      else
        _ -> {:cont, nil}
      end
    end)
  end

356
357
  def handle_incoming(data, options \\ [])

358
359
  # Flag objects are placed ahead of the ID check because Mastodon 2.8 and earlier send them
  # with nil ID.
360
  def handle_incoming(%{"type" => "Flag", "object" => objects, "actor" => actor} = data, _options) do
361
362
363
364
    with context <- data["context"] || Utils.generate_context_id(),
         content <- data["content"] || "",
         %User{} = actor <- User.get_cached_by_ap_id(actor),
         # Reduce the object list to find the reported user.
365
         %User{} = account <- get_reported(objects),
366
367
         # Remove the reported user from the object list.
         statuses <- Enum.filter(objects, fn ap_id -> ap_id != account.ap_id end) do
368
      %{
369
370
371
372
373
        actor: actor,
        context: context,
        account: account,
        statuses: statuses,
        content: content,
374
        additional: %{"cc" => [account.ap_id]}
375
      }
376
      |> ActivityPub.flag()
377
378
379
    end
  end

380
  # disallow objects with bogus IDs
381
382
  def handle_incoming(%{"id" => nil}, _options), do: :error
  def handle_incoming(%{"id" => ""}, _options), do: :error
383
  # length of https:// = 8, should validate better, but good enough for now.
rinpatch's avatar
rinpatch committed
384
  def handle_incoming(%{"id" => id}, _options) when is_binary(id) and byte_size(id) < 8,
385
    do: :error
386

387
388
389
390
391
392
393
394
395
396
397
  def handle_incoming(
        %{"type" => "Listen", "object" => %{"type" => "Audio"} = object} = data,
        options
      ) do
    actor = Containment.get_actor(data)

    data =
      Map.put(data, "actor", actor)
      |> fix_addressing

    with {:ok, %User{} = user} <- User.get_or_fetch_by_ap_id(data["actor"]) do
398
399
      reply_depth = (options[:depth] || 0) + 1
      options = Keyword.put(options, :depth, reply_depth)
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
      object = fix_object(object, options)

      params = %{
        to: data["to"],
        object: object,
        actor: user,
        context: nil,
        local: false,
        published: data["published"],
        additional: Map.take(data, ["cc", "id"])
      }

      ActivityPub.listen(params)
    else
      _e -> :error
    end
  end

418
419
420
421
422
423
424
425
426
427
  @misskey_reactions %{
    "like" => "👍",
    "love" => "❤️",
    "laugh" => "😆",
    "hmm" => "🤔",
    "surprise" => "😮",
    "congrats" => "🎉",
    "angry" => "💢",
    "confused" => "😥",
    "rip" => "😇",
428
429
    "pudding" => "🍮",
    "star" => "⭐"
430
431
  }

lain's avatar
lain committed
432
  @doc "Rewrite misskey likes into EmojiReacts"
433
434
435
436
437
438
439
440
  def handle_incoming(
        %{
          "type" => "Like",
          "_misskey_reaction" => reaction
        } = data,
        options
      ) do
    data
lain's avatar
lain committed
441
    |> Map.put("type", "EmojiReact")
442
    |> Map.put("content", @misskey_reactions[reaction] || reaction)
443
444
445
    |> handle_incoming(options)
  end

Haelwenn's avatar
Haelwenn committed
446
  def handle_incoming(
447
        %{"type" => "Create", "object" => %{"type" => objtype, "id" => obj_id}} = data,
Haelwenn's avatar
Haelwenn committed
448
        options
Haelwenn's avatar
Haelwenn committed
449
      )
Haelwenn's avatar
Haelwenn committed
450
      when objtype in ~w{Question Answer ChatMessage Audio Video Event Article Note Page} do
451
452
453
454
455
456
457
458
459
    fetch_options = Keyword.put(options, :depth, (options[:depth] || 0) + 1)

    object =
      data["object"]
      |> strip_internal_fields()
      |> fix_type(fetch_options)
      |> fix_in_reply_to(fetch_options)

    data = Map.put(data, "object", object)
Haelwenn's avatar
Haelwenn committed
460
    options = Keyword.put(options, :local, false)
461

Haelwenn's avatar
Haelwenn committed
462
    with {:ok, %User{}} <- ObjectValidator.fetch_actor(data),
463
         nil <- Activity.get_create_by_object_ap_id(obj_id),
Haelwenn's avatar
Haelwenn committed
464
         {:ok, activity, _} <- Pipeline.common_pipeline(data, options) do
Haelwenn's avatar
Haelwenn committed
465
      {:ok, activity}
466
467
468
    else
      %Activity{} = activity -> {:ok, activity}
      e -> e
Haelwenn's avatar
Haelwenn committed
469
470
471
    end
  end

472
  def handle_incoming(%{"type" => type} = data, _options)
Alexander Strizhakov's avatar
Alexander Strizhakov committed
473
      when type in ~w{Like EmojiReact Announce Add Remove} do
lain's avatar
lain committed
474
475
476
    with :ok <- ObjectValidator.fetch_actor_and_object(data),
         {:ok, activity, _meta} <-
           Pipeline.common_pipeline(data, local: false) do
lain's avatar
lain committed
477
478
      {:ok, activity}
    else
479
      e -> {:error, e}
lain's avatar
lain committed
480
481
482
    end
  end

lain's avatar
lain committed
483
  def handle_incoming(
484
        %{"type" => type} = data,
485
        _options
486
      )
487
      when type in ~w{Update Block Follow Accept Reject} do
488
    with {:ok, %User{}} <- ObjectValidator.fetch_actor(data),
489
490
         {:ok, activity, _} <-
           Pipeline.common_pipeline(data, local: false) do
491
      {:ok, activity}
lain's avatar
lain committed
492
493
494
    end
  end

lain's avatar
lain committed
495
  def handle_incoming(
496
        %{"type" => "Delete"} = data,
497
        _options
lain's avatar
lain committed
498
      ) do
499
500
    with {:ok, activity, _} <-
           Pipeline.common_pipeline(data, local: false) do
lain's avatar
lain committed
501
      {:ok, activity}
502
    else
Haelwenn's avatar
Haelwenn committed
503
      {:error, {:validate, _}} = e ->
504
        # Check if we have a create activity for this
505
        with {:ok, object_id} <- ObjectValidators.ObjectID.cast(data["object"]),
506
507
508
509
510
511
512
513
514
             %Activity{data: %{"actor" => actor}} <-
               Activity.create_by_object_ap_id(object_id) |> Repo.one(),
             # We have one, insert a tombstone and retry
             {:ok, tombstone_data, _} <- Builder.tombstone(actor, object_id),
             {:ok, _tombstone} <- Object.create(tombstone_data) do
          handle_incoming(data)
        else
          _ -> e
        end
lain's avatar
lain committed
515
516
517
    end
  end

normandy's avatar
normandy committed
518
519
520
521
522
523
  def handle_incoming(
        %{
          "type" => "Undo",
          "object" => %{"type" => "Follow", "object" => followed},
          "actor" => follower,
          "id" => id
524
525
        } = _data,
        _options
normandy's avatar
normandy committed
526
      ) do
normandy's avatar
normandy committed
527
    with %User{local: true} = followed <- User.get_cached_by_ap_id(followed),
528
         {:ok, %User{} = follower} <- User.get_or_fetch_by_ap_id(follower),
normandy's avatar
normandy committed
529
         {:ok, activity} <- ActivityPub.unfollow(follower, followed, id, false) do
normandy's avatar
normandy committed
530
531
532
      User.unfollow(follower, followed)
      {:ok, activity}
    else
Maksim's avatar
Maksim committed
533
      _e -> :error
normandy's avatar
normandy committed
534
535
536
    end
  end

537
538
539
  def handle_incoming(
        %{
          "type" => "Undo",
540
          "object" => %{"type" => type}
541
542
        } = data,
        _options
543
      )
544
      when type in ["Like", "EmojiReact", "Announce", "Block"] do
545
    with {:ok, activity, _} <- Pipeline.common_pipeline(data, local: false) do
546
547
548
549
      {:ok, activity}
    end
  end

550
  # For Undos that don't have the complete object attached, try to find it in our database.
normandy's avatar
normandy committed
551
552
553
  def handle_incoming(
        %{
          "type" => "Undo",
554
555
556
557
558
559
560
561
562
          "object" => object
        } = activity,
        options
      )
      when is_binary(object) do
    with %Activity{data: data} <- Activity.get_by_ap_id(object) do
      activity
      |> Map.put("object", data)
      |> handle_incoming(options)
normandy's avatar
normandy committed
563
    else
Maksim's avatar
Maksim committed
564
      _e -> :error
normandy's avatar
normandy committed
565
566
567
    end
  end

minibikini's avatar
minibikini committed
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
  def handle_incoming(
        %{
          "type" => "Move",
          "actor" => origin_actor,
          "object" => origin_actor,
          "target" => target_actor
        },
        _options
      ) do
    with %User{} = origin_user <- User.get_cached_by_ap_id(origin_actor),
         {:ok, %User{} = target_user} <- User.get_or_fetch_by_ap_id(target_actor),
         true <- origin_actor in target_user.also_known_as do
      ActivityPub.move(origin_user, target_user, false)
    else
      _e -> :error
    end
  end

586
  def handle_incoming(_, _), do: :error
587

588
  @spec get_obj_helper(String.t(), Keyword.t()) :: {:ok, Object.t()} | nil
589
  def get_obj_helper(id, options \\ []) do
590
591
592
    options = Keyword.put(options, :fetch, true)

    case Object.normalize(id, options) do
Maksim's avatar
Maksim committed
593
594
      %Object{} = object -> {:ok, object}
      _ -> nil
595
    end
596
597
  end

598
  @spec get_embedded_obj_helper(String.t() | Object.t(), User.t()) :: {:ok, Object.t()} | nil
Thibaut Girka's avatar
Thibaut Girka committed
599
  def get_embedded_obj_helper(%{"attributedTo" => attributed_to, "id" => object_id} = data, %User{
600
601
        ap_id: ap_id
      })
Thibaut Girka's avatar
Thibaut Girka committed
602
      when attributed_to == ap_id do
603
604
605
606
607
    with {:ok, activity} <-
           handle_incoming(%{
             "type" => "Create",
             "to" => data["to"],
             "cc" => data["cc"],
Thibaut Girka's avatar
Thibaut Girka committed
608
             "actor" => attributed_to,
609
610
             "object" => data
           }) do
611
      {:ok, Object.normalize(activity, fetch: false)}
612
613
614
615
616
617
618
619
620
    else
      _ -> get_obj_helper(object_id)
    end
  end

  def get_embedded_obj_helper(object_id, _) do
    get_obj_helper(object_id)
  end

621
622
623
624
  def set_reply_to_uri(%{"inReplyTo" => in_reply_to} = object) when is_binary(in_reply_to) do
    with false <- String.starts_with?(in_reply_to, "http"),
         {:ok, %{data: replied_to_object}} <- get_obj_helper(in_reply_to) do
      Map.put(object, "inReplyTo", replied_to_object["external_url"] || in_reply_to)
625
626
627
628
    else
      _e -> object
    end
  end
lain's avatar
lain committed
629

630
631
  def set_reply_to_uri(obj), do: obj

632
633
634
635
  @doc """
  Serialized Mastodon-compatible `replies` collection containing _self-replies_.
  Based on Mastodon's ActivityPub::NoteSerializer#replies.
  """
636
  def set_replies(obj_data) do
637
    replies_uris =
Ivan Tashkinov's avatar
Ivan Tashkinov committed
638
639
      with limit when limit > 0 <-
             Pleroma.Config.get([:activitypub, :note_replies_output_limit], 0),
640
641
642
643
           %Object{} = object <- Object.get_cached_by_ap_id(obj_data["id"]) do
        object
        |> Object.self_replies()
        |> select([o], fragment("?->>'id'", o.data))
644
645
        |> limit(^limit)
        |> Repo.all()
Ivan Tashkinov's avatar
Ivan Tashkinov committed
646
647
      else
        _ -> []
648
649
      end

Ivan Tashkinov's avatar
Ivan Tashkinov committed
650
    set_replies(obj_data, replies_uris)
651
652
  end

Ivan Tashkinov's avatar
Ivan Tashkinov committed
653
  defp set_replies(obj, []) do
654
655
656
657
658
659
    obj
  end

  defp set_replies(obj, replies_uris) do
    replies_collection = %{
      "type" => "Collection",
660
      "items" => replies_uris
661
662
663
664
665
    }

    Map.merge(obj, %{"replies" => replies_collection})
  end

Ivan Tashkinov's avatar
Ivan Tashkinov committed
666
667
668
  def replies(%{"replies" => %{"first" => %{"items" => items}}}) when not is_nil(items) do
    items
  end
669

Ivan Tashkinov's avatar
Ivan Tashkinov committed
670
671
  def replies(%{"replies" => %{"items" => items}}) when not is_nil(items) do
    items
672
673
674
675
  end

  def replies(_), do: []

676
  # Prepares the object of an outgoing create activity.
lain's avatar
lain committed
677
678
  def prepare_object(object) do
    object
lain's avatar
lain committed
679
    |> add_hashtags
lain's avatar
lain committed
680
    |> add_mention_tags
lain's avatar
lain committed
681
    |> add_emoji_tags
lain's avatar
lain committed
682
    |> add_attributed_to
lain's avatar
lain committed
683
    |> prepare_attachments
lain's avatar
lain committed
684
    |> set_conversation
685
    |> set_reply_to_uri
686
    |> set_replies
687
688
    |> strip_internal_fields
    |> strip_internal_tags
689
    |> set_type
lain's avatar
lain committed
690
691
  end

feld's avatar
feld committed
692
693
694
695
  #  @doc
  #  """
  #  internal -> Mastodon
  #  """
lain's avatar
lain committed
696

697
698
  def prepare_outgoing(%{"type" => activity_type, "object" => object_id} = data)
      when activity_type in ["Create", "Listen"] do
lain's avatar
lain committed
699
    object =
minibikini's avatar
minibikini committed
700
      object_id
701
      |> Object.normalize(fetch: false)
minibikini's avatar
minibikini committed
702
      |> Map.get(:data)
lain's avatar
lain committed
703
704
705
706
707
      |> prepare_object

    data =
      data
      |> Map.put("object", object)
lain's avatar
lain committed
708
      |> Map.merge(Utils.make_json_ld_header())
minibikini's avatar
minibikini committed
709
      |> Map.delete("bcc")
lain's avatar
lain committed
710
711
712
713

    {:ok, data}
  end

714
715
716
  def prepare_outgoing(%{"type" => "Announce", "actor" => ap_id, "object" => object_id} = data) do
    object =
      object_id
717
      |> Object.normalize(fetch: false)
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734

    data =
      if Visibility.is_private?(object) && object.data["actor"] == ap_id do
        data |> Map.put("object", object |> Map.get(:data) |> prepare_object)
      else
        data |> maybe_fix_object_url
      end

    data =
      data
      |> strip_internal_fields
      |> Map.merge(Utils.make_json_ld_header())
      |> Map.delete("bcc")

    {:ok, data}
  end

kaniini's avatar
kaniini committed
735
736
737
  # Mastodon Accept/Reject requires a non-normalized object containing the actor URIs,
  # because of course it does.
  def prepare_outgoing(%{"type" => "Accept"} = data) do
738
    with follow_activity <- Activity.normalize(data["object"]) do
kaniini's avatar
kaniini committed
739
740
741
742
743
744
745
746
747
748
      object = %{
        "actor" => follow_activity.actor,
        "object" => follow_activity.data["object"],
        "id" => follow_activity.data["id"],
        "type" => "Follow"
      }

      data =
        data
        |> Map.put("object", object)
lain's avatar
lain committed
749
        |> Map.merge(Utils.make_json_ld_header())
kaniini's avatar
kaniini committed
750
751
752
753
754

      {:ok, data}
    end
  end

755
  def prepare_outgoing(%{"type" => "Reject"} = data) do
756
    with follow_activity <- Activity.normalize(data["object"]) do
757
758
759
760
761
762
763
764
765
766
      object = %{
        "actor" => follow_activity.actor,
        "object" => follow_activity.data["object"],
        "id" => follow_activity.data["id"],
        "type" => "Follow"
      }

      data =
        data
        |> Map.put("object", object)
lain's avatar
lain committed
767
        |> Map.merge(Utils.make_json_ld_header())
768
769
770
771
772

      {:ok, data}
    end
  end

feld's avatar
feld committed
773
  def prepare_outgoing(%{"type" => _type} = data) do
lain's avatar
lain committed
774
775
    data =
      data
776
      |> strip_internal_fields
lain's avatar
lain committed
777
      |> maybe_fix_object_url
lain's avatar
lain committed
778
      |> Map.merge(Utils.make_json_ld_header())
779
780
781
782

    {:ok, data}
  end

783
784
785
786
787
788
  def maybe_fix_object_url(%{"object" => object} = data) when is_binary(object) do
    with false <- String.starts_with?(object, "http"),
         {:fetch, {:ok, relative_object}} <- {:fetch, get_obj_helper(object)},
         %{data: %{"external_url" => external_url}} when not is_nil(external_url) <-
           relative_object do
      Map.put(data, "object", external_url)
789
    else
790
791
792
793
794
795
      {:fetch, e} ->
        Logger.error("Couldn't fetch #{object} #{inspect(e)}")
        data

      _ ->
        data
796
797
798
    end
  end

799
800
  def maybe_fix_object_url(data), do: data

lain's avatar
lain committed
801
  def add_hashtags(object) do
802
803
804
805
806
807
808
809
810
811
812
813
814
815
    tags =
      (object["tag"] || [])
      |> Enum.map(fn
        # Expand internal representation tags into AS2 tags.
        tag when is_binary(tag) ->
          %{
            "href" => Pleroma.Web.Endpoint.url() <> "/tags/#{tag}",
            "name" => "##{tag}",
            "type" => "Hashtag"
          }

        # Do not process tags which are already AS2 tag objects.
        tag when is_map(tag) ->
          tag
lain's avatar
lain committed
816
      end)
lain's avatar
lain committed
817

818
    Map.put(object, "tag", tags)
lain's avatar
lain committed
819
820
  end

821
822
  # TODO These should be added on our side on insertion, it doesn't make much
  # sense to regenerate these all the time
lain's avatar
lain committed
823
  def add_mention_tags(object) do
824
825
826
827
828
    to = object["to"] || []
    cc = object["cc"] || []
    mentioned = User.get_users_from_set(to ++ cc, local_only: false)

    mentions = Enum.map(mentioned, &build_mention_tag/1)
lain's avatar
lain committed
829

lain's avatar
lain committed
830
    tags = object["tag"] || []
831
    Map.put(object, "tag", tags ++ mentions)
lain's avatar
lain committed
832
833
  end

Maksim's avatar
Maksim committed
834
835
836
  defp build_mention_tag(%{ap_id: ap_id, nickname: nickname} = _) do
    %{"type" => "Mention", "href" => ap_id, "name" => "@#{nickname}"}
  end
Haelwenn's avatar
Haelwenn committed
837

838
  def take_emoji_tags(%User{emoji: emoji}) do
Maksim's avatar
Maksim committed
839
    emoji
840
    |> Map.to_list()
Maksim's avatar
Maksim committed
841
    |> Enum.map(&build_emoji_tag/1)
Haelwenn's avatar
Haelwenn committed
842
843
  end

lain's avatar
lain committed
844
  # TODO: we should probably send mtime instead of unix epoch time for updated
Haelwenn's avatar
Haelwenn committed
845
  def add_emoji_tags(%{"emoji" => emoji} = object) do
lain's avatar
lain committed
846
    tags = object["tag"] || []
lain's avatar
lain committed
847

Maksim's avatar
Maksim committed
848
    out = Enum.map(emoji, &build_emoji_tag/1)
lain's avatar
lain committed
849

850
    Map.put(object, "tag", tags ++ out)
lain's avatar
lain committed
851
852
  end

853
  def add_emoji_tags(object), do: object
Haelwenn's avatar
Haelwenn committed
854

Maksim's avatar
Maksim committed
855
856
  defp build_emoji_tag({name, url}) do
    %{
feld's avatar
feld committed
857
      "icon" => %{"url" => "#{URI.encode(url)}", "type" => "Image"},
Maksim's avatar
Maksim committed
858
859
860
861
862
863
864
      "name" => ":" <> name <> ":",
      "type" => "Emoji",
      "updated" => "1970-01-01T00:00:00Z",
      "id" => url
    }
  end

lain's avatar
lain committed
865
866
867
868
  def set_conversation(object) do
    Map.put(object, "conversation", object["context"])
  end

869
870
871
872
873
874
  def set_type(%{"type" => "Answer"} = object) do
    Map.put(object, "type", "Note")
  end

  def set_type(object), do: object

lain's avatar
lain committed
875
  def add_attributed_to(object) do
876
    attributed_to = object["attributedTo"] || object["actor"]
877
    Map.put(object, "attributedTo", attributed_to)
878
  end
lain's avatar
lain committed
879

880
881
882
  # TODO: Revisit this
  def prepare_attachments(%{"type" => "ChatMessage"} = object), do: object

lain's avatar
lain committed
883
  def prepare_attachments(object) do
lain's avatar
lain committed
884
    attachments =
Maksim's avatar
Maksim committed
885
886
      object
      |> Map.get("attachment", [])
lain's avatar
lain committed
887
      |> Enum.map(fn data ->
888
        [%{"mediaType" => media_type, "href" => href} = url | _] = data["url"]
Maksim's avatar
Maksim committed
889
890
891
892
893
894
895

        %{
          "url" => href,
          "mediaType" => media_type,
          "name" => data["name"],
          "type" => "Document"
        }
896
897
        |> Maps.put_if_present("width", url["width"])
        |> Maps.put_if_present("height", url["height"])
Alex Gleason's avatar
Alex Gleason committed
898
        |> Maps.put_if_present("blurhash", data["blurhash"])
lain's avatar
lain committed
899
      end)
lain's avatar
lain committed
900

901
    Map.put(object, "attachment", attachments)
lain's avatar
lain committed
902
  end
lain's avatar
lain committed
903

904
  def strip_internal_fields(object) do
Maksim's avatar
Maksim committed
905
    Map.drop(object, Pleroma.Constants.object_internal_fields())
906
907
908
  end

  defp strip_internal_tags(%{"tag" => tags} = object) do
909
    tags = Enum.filter(tags, fn x -> is_map(x) end)
910

911
    Map.put(object, "tag", tags)
912
913
914
915
  end

  defp strip_internal_tags(object), do: object

916
  def perform(:user_upgrade, user) do
917
918
    # we pass a fake user so that the followers collection is stripped away
    old_follower_address = User.ap_followers(%User{nickname: user.nickname})
lain's avatar
lain committed
919

920
921
922
923
924
925
926
927
928
929
930
931
    from(
      a in Activity,
      where: ^old_follower_address in a.recipients,
      update: [
        set: [
          recipients:
            fragment(
              "array_replace(?,?,?)",
              a.recipients,
              ^old_follower_address,
              ^user.follower_address
            )
lain's avatar
lain committed
932
        ]
933
934
935
      ]
    )
    |> Repo.update_all([])
lain's avatar
lain committed
936
937
  end

938
  def upgrade_user_from_ap_id(ap_id) do
minibikini's avatar
minibikini committed
939
    with %User{local: false} = user <- User.get_cached_by_ap_id(ap_id),
rinpatch's avatar
rinpatch committed
940
         {:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id),
941
         {:ok, user} <- update_user(user, data) do
Alexander Strizhakov's avatar
Alexander Strizhakov committed
942
      {:ok, _pid} = Task.start(fn -> ActivityPub.pinned_fetch_task(user) end)
943
      TransmogrifierWorker.enqueue("user_upgrade", %{"user_id" => user.id})
lain's avatar
lain committed
944
945
      {:ok, user}
    else
946
      %User{} = user -> {:ok, user}
lain's avatar
lain committed
947
948
949
      e -> e
    end
  end
950

951
  defp update_user(user, data) do
Maksim's avatar
Maksim committed
952
    user
953
    |> User.remote_user_changeset(data)
Maksim's avatar
Maksim committed
954
955
956
    |> User.update_and_set_cache()
  end