about summary refs log tree commit diff
path: root/app/services/activitypub/process_account_service.rb
blob: 4cb8e09db37178bb7bb892f864edcb231a5e9cf2 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
# frozen_string_literal: true

class ActivityPub::ProcessAccountService < BaseService
  include JsonLdHelper
  include DomainControlHelper

  # Should be called with confirmed valid JSON
  # and WebFinger-resolved username and domain
  def call(username, domain, json, options = {})
    return if json['inbox'].blank? || unsupported_uri_scheme?(json['id']) || domain_not_allowed?(domain)

    @options     = options
    @json        = json
    @uri         = @json['id']
    @username    = username
    @domain      = domain
    @collections = {}

    RedisLock.acquire(lock_options) do |lock|
      if lock.acquired?
        @account            = Account.remote.find_by(uri: @uri) if @options[:only_key]
        @account          ||= Account.find_remote(@username, @domain)
        @old_public_key     = @account&.public_key
        @old_protocol       = @account&.protocol
        @suspension_changed = false

        create_account if @account.nil?
        update_account
        process_tags
        process_attachments
      else
        raise Mastodon::RaceConditionError
      end
    end

    return if @account.nil?

    after_protocol_change! if protocol_changed?
    after_key_change! if key_changed? && !@options[:signed_with_known_key]
    clear_tombstones! if key_changed?
    after_suspension_change! if suspension_changed?

    unless @options[:only_key] || @account.suspended?
      check_featured_collection! if @account.featured_collection_url.present?
      check_links! unless @account.fields.empty?
    end

    @account
  rescue Oj::ParseError
    nil
  end

  private

  def create_account
    @account = Account.new
    @account.protocol          = :activitypub
    @account.username          = @username
    @account.domain            = @domain
    @account.private_key       = nil
    @account.suspended_at      = domain_block.created_at if auto_suspend?
    @account.suspension_origin = :local if auto_suspend?
    @account.silenced_at       = domain_block.created_at if auto_silence?
    @account.save
  end

  def update_account
    @account.last_webfingered_at = Time.now.utc unless @options[:only_key]
    @account.protocol            = :activitypub

    set_suspension!
    set_immediate_attributes! unless @account.suspended?
    set_fetchable_attributes! unless @options[:only_keys] || @account.suspended?

    @account.save_with_optional_media!
  end

  def set_immediate_attributes!
    @account.inbox_url               = @json['inbox'] || ''
    @account.outbox_url              = @json['outbox'] || ''
    @account.shared_inbox_url        = (@json['endpoints'].is_a?(Hash) ? @json['endpoints']['sharedInbox'] : @json['sharedInbox']) || ''
    @account.followers_url           = @json['followers'] || ''
    @account.featured_collection_url = @json['featured'] || ''
    @account.devices_url             = @json['devices'] || ''
    @account.url                     = url || @uri
    @account.uri                     = @uri
    @account.display_name            = @json['name'] || ''
    @account.note                    = @json['summary'] || ''
    @account.locked                  = @json['manuallyApprovesFollowers'] || false
    @account.fields                  = property_values || {}
    @account.also_known_as           = as_array(@json['alsoKnownAs'] || []).map { |item| value_or_id(item) }
    @account.actor_type              = actor_type
    @account.discoverable            = @json['discoverable'] || false
  end

  def set_fetchable_attributes!
    @account.avatar_remote_url = image_url('icon')  || '' unless skip_download?
    @account.header_remote_url = image_url('image') || '' unless skip_download?
    @account.public_key        = public_key || ''
    @account.statuses_count    = outbox_total_items    if outbox_total_items.present?
    @account.following_count   = following_total_items if following_total_items.present?
    @account.followers_count   = followers_total_items if followers_total_items.present?
    @account.hide_collections  = following_private? || followers_private?
    @account.moved_to_account  = @json['movedTo'].present? ? moved_account : nil
  end

  def set_suspension!
    return if @account.suspended? && @account.suspension_origin_local?

    if @account.suspended? && !@json['suspended']
      @account.unsuspend!
      @suspension_changed = true
    elsif !@account.suspended? && @json['suspended']
      @account.suspend!(origin: :remote)
      @suspension_changed = true
    end
  end

  def after_protocol_change!
    ActivityPub::PostUpgradeWorker.perform_async(@account.domain)
  end

  def after_key_change!
    RefollowWorker.perform_async(@account.id)
  end

  def after_suspension_change!
    if @account.suspended?
      Admin::SuspensionWorker.perform_async(@account.id)
    else
      Admin::UnsuspensionWorker.perform_async(@account.id)
    end
  end

  def check_featured_collection!
    ActivityPub::SynchronizeFeaturedCollectionWorker.perform_async(@account.id)
  end

  def check_links!
    VerifyAccountLinksWorker.perform_async(@account.id)
  end

  def actor_type
    if @json['type'].is_a?(Array)
      @json['type'].find { |type| ActivityPub::FetchRemoteAccountService::SUPPORTED_TYPES.include?(type) }
    else
      @json['type']
    end
  end

  def image_url(key)
    value = first_of_value(@json[key])

    return if value.nil?
    return value['url'] if value.is_a?(Hash)

    image = fetch_resource_without_id_validation(value)
    image['url'] if image
  end

  def public_key
    value = first_of_value(@json['publicKey'])

    return if value.nil?
    return value['publicKeyPem'] if value.is_a?(Hash)

    key = fetch_resource_without_id_validation(value)
    key['publicKeyPem'] if key
  end

  def url
    return if @json['url'].blank?

    url_candidate = url_to_href(@json['url'], 'text/html')

    if unsupported_uri_scheme?(url_candidate) || mismatching_origin?(url_candidate)
      nil
    else
      url_candidate
    end
  end

  def property_values
    return unless @json['attachment'].is_a?(Array)
    as_array(@json['attachment']).select { |attachment| attachment['type'] == 'PropertyValue' }.map { |attachment| attachment.slice('name', 'value') }
  end

  def mismatching_origin?(url)
    needle   = Addressable::URI.parse(url).host
    haystack = Addressable::URI.parse(@uri).host

    !haystack.casecmp(needle).zero?
  end

  def outbox_total_items
    collection_info('outbox').first
  end

  def following_total_items
    collection_info('following').first
  end

  def followers_total_items
    collection_info('followers').first
  end

  def following_private?
    !collection_info('following').last
  end

  def followers_private?
    !collection_info('followers').last
  end

  def collection_info(type)
    return [nil, nil] if @json[type].blank?
    return @collections[type] if @collections.key?(type)

    collection = fetch_resource_without_id_validation(@json[type])

    total_items = collection.is_a?(Hash) && collection['totalItems'].present? && collection['totalItems'].is_a?(Numeric) ? collection['totalItems'] : nil
    has_first_page = collection.is_a?(Hash) && collection['first'].present?
    @collections[type] = [total_items, has_first_page]
  rescue HTTP::Error, OpenSSL::SSL::SSLError, Mastodon::LengthValidationError
    @collections[type] = [nil, nil]
  end

  def moved_account
    account   = ActivityPub::TagManager.instance.uri_to_resource(@json['movedTo'], Account)
    account ||= ActivityPub::FetchRemoteAccountService.new.call(@json['movedTo'], id: true, break_on_redirect: true)
    account
  end

  def skip_download?
    @account.suspended? || domain_block&.reject_media?
  end

  def auto_suspend?
    domain_block&.suspend?
  end

  def auto_silence?
    domain_block&.silence?
  end

  def domain_block
    return @domain_block if defined?(@domain_block)
    @domain_block = DomainBlock.rule_for(@domain)
  end

  def key_changed?
    !@old_public_key.nil? && @old_public_key != @account.public_key
  end

  def suspension_changed?
    @suspension_changed
  end

  def clear_tombstones!
    Tombstone.where(account_id: @account.id).delete_all
  end

  def protocol_changed?
    !@old_protocol.nil? && @old_protocol != @account.protocol
  end

  def lock_options
    { redis: Redis.current, key: "process_account:#{@uri}" }
  end

  def process_tags
    return if @json['tag'].blank?

    as_array(@json['tag']).each do |tag|
      process_emoji tag if equals_or_includes?(tag['type'], 'Emoji')
    end
  end

  def process_attachments
    return if @json['attachment'].blank?

    previous_proofs = @account.identity_proofs.to_a
    current_proofs  = []

    as_array(@json['attachment']).each do |attachment|
      next unless equals_or_includes?(attachment['type'], 'IdentityProof')
      current_proofs << process_identity_proof(attachment)
    end

    previous_proofs.each do |previous_proof|
      next if current_proofs.any? { |current_proof| current_proof.id == previous_proof.id }
      previous_proof.delete
    end
  end

  def process_emoji(tag)
    return if skip_download?
    return if tag['name'].blank? || tag['icon'].blank? || tag['icon']['url'].blank?

    shortcode = tag['name'].delete(':')
    image_url = tag['icon']['url']
    uri       = tag['id']
    updated   = tag['updated']
    emoji     = CustomEmoji.find_by(shortcode: shortcode, domain: @account.domain)

    return unless emoji.nil? || image_url != emoji.image_remote_url || (updated && updated >= emoji.updated_at)

    emoji ||= CustomEmoji.new(domain: @account.domain, shortcode: shortcode, uri: uri)
    emoji.image_remote_url = image_url
    emoji.save
  end

  def process_identity_proof(attachment)
    provider          = attachment['signatureAlgorithm']
    provider_username = attachment['name']
    token             = attachment['signatureValue']

    @account.identity_proofs.where(provider: provider, provider_username: provider_username).find_or_create_by(provider: provider, provider_username: provider_username, token: token)
  end
end