about summary refs log tree commit diff
path: root/app/lib/activitypub/activity/create.rb
blob: 3a985c19b68fe81b7f86735905bed36ca29484f3 (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
# frozen_string_literal: true

class ActivityPub::Activity::Create < ActivityPub::Activity
  SUPPORTED_TYPES = %w(Article Note).freeze
  CONVERTED_TYPES = %w(Image Video).freeze

  def perform
    return if delete_arrived_first?(object_uri) || unsupported_object_type?

    RedisLock.acquire(lock_options) do |lock|
      if lock.acquired?
        @status = find_existing_status
        process_status if @status.nil?
      end
    end

    @status
  end

  private

  def process_status
    media_attachments = process_attachments

    ApplicationRecord.transaction do
      @status = Status.create!(status_params)

      process_tags(@status)
      attach_media(@status, media_attachments)
    end

    resolve_thread(@status)
    distribute(@status)
    forward_for_reply if @status.public_visibility? || @status.unlisted_visibility?
  end

  def find_existing_status
    status   = status_from_uri(object_uri)
    status ||= Status.find_by(uri: @object['atomUri']) if @object['atomUri'].present?
    status
  end

  def status_params
    {
      uri: @object['id'],
      url: object_url || @object['id'],
      account: @account,
      text: text_from_content || '',
      language: detected_language,
      spoiler_text: @object['summary'] || '',
      created_at: @options[:override_timestamps] ? nil : @object['published'],
      reply: @object['inReplyTo'].present?,
      sensitive: @object['sensitive'] || false,
      visibility: visibility_from_audience,
      thread: replied_to_status,
      conversation: conversation_from_uri(@object['conversation']),
    }
  end

  def process_tags(status)
    return if @object['tag'].nil?

    as_array(@object['tag']).each do |tag|
      case tag['type']
      when 'Hashtag'
        process_hashtag tag, status
      when 'Mention'
        process_mention tag, status
      when 'Emoji'
        process_emoji tag, status
      end
    end
  end

  def process_hashtag(tag, status)
    return if tag['name'].blank?

    hashtag = tag['name'].gsub(/\A#/, '').mb_chars.downcase
    hashtag = Tag.where(name: hashtag).first_or_initialize(name: hashtag)

    status.tags << hashtag
  end

  def process_mention(tag, status)
    return if tag['href'].blank?

    account = account_from_uri(tag['href'])
    account = FetchRemoteAccountService.new.call(tag['href'], id: false) if account.nil?
    return if account.nil?
    account.mentions.create(status: status)
  end

  def process_emoji(tag, _status)
    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? || emoji.updated_at >= updated

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

  def process_attachments
    return if @object['attachment'].nil?

    media_attachments = []

    as_array(@object['attachment']).each do |attachment|
      next if unsupported_media_type?(attachment['mediaType']) || attachment['url'].blank?

      href             = Addressable::URI.parse(attachment['url']).normalize.to_s
      media_attachment = MediaAttachment.create(account: @account, remote_url: href, description: attachment['name'].presence)
      media_attachments << media_attachment

      next if skip_download?

      media_attachment.file_remote_url = href
      media_attachment.save
    end

    media_attachments
  rescue Addressable::URI::InvalidURIError => e
    Rails.logger.debug e

    media_attachments
  end

  def attach_media(status, media_attachments)
    return if media_attachments.blank?

    media = MediaAttachment.where(status_id: nil, id: media_attachments.take(4).map(&:id))
    media.update(status_id: status.id)
  end

  def resolve_thread(status)
    return unless status.reply? && status.thread.nil?
    ThreadResolveWorker.perform_async(status.id, in_reply_to_uri)
  end

  def conversation_from_uri(uri)
    return nil if uri.nil?
    return Conversation.find_by(id: OStatus::TagManager.instance.unique_tag_to_local_id(uri, 'Conversation')) if OStatus::TagManager.instance.local_id?(uri)
    Conversation.find_by(uri: uri) || Conversation.create(uri: uri)
  end

  def visibility_from_audience
    if equals_or_includes?(@object['to'], ActivityPub::TagManager::COLLECTIONS[:public])
      :public
    elsif equals_or_includes?(@object['cc'], ActivityPub::TagManager::COLLECTIONS[:public])
      :unlisted
    elsif equals_or_includes?(@object['to'], @account.followers_url)
      :private
    else
      :direct
    end
  end

  def audience_includes?(account)
    uri = ActivityPub::TagManager.instance.uri_for(account)
    equals_or_includes?(@object['to'], uri) || equals_or_includes?(@object['cc'], uri)
  end

  def replied_to_status
    return @replied_to_status if defined?(@replied_to_status)

    if in_reply_to_uri.blank?
      @replied_to_status = nil
    else
      @replied_to_status   = status_from_uri(in_reply_to_uri)
      @replied_to_status ||= status_from_uri(@object['inReplyToAtomUri']) if @object['inReplyToAtomUri'].present?
      @replied_to_status
    end
  end

  def in_reply_to_uri
    value_or_id(@object['inReplyTo'])
  end

  def text_from_content
    return Formatter.instance.linkify([text_from_name, object_url || @object['id']].join(' ')) if converted_object_type?

    if @object['content'].present?
      @object['content']
    elsif content_language_map?
      @object['contentMap'].values.first
    end
  end

  def text_from_name
    if @object['name'].present?
      @object['name']
    elsif name_language_map?
      @object['nameMap'].values.first
    end
  end

  def detected_language
    if content_language_map?
      @object['contentMap'].keys.first
    elsif name_language_map?
      @object['nameMap'].keys.first
    elsif supported_object_type?
      LanguageDetector.instance.detect(text_from_content, @account)
    end
  end

  def object_url
    return if @object['url'].blank?
    url_to_href(@object['url'], 'text/html')
  end

  def content_language_map?
    @object['contentMap'].is_a?(Hash) && !@object['contentMap'].empty?
  end

  def name_language_map?
    @object['nameMap'].is_a?(Hash) && !@object['nameMap'].empty?
  end

  def unsupported_object_type?
    @object.is_a?(String) || !(supported_object_type? || converted_object_type?)
  end

  def unsupported_media_type?(mime_type)
    mime_type.present? && !(MediaAttachment::IMAGE_MIME_TYPES + MediaAttachment::VIDEO_MIME_TYPES).include?(mime_type)
  end

  def supported_object_type?
    SUPPORTED_TYPES.include?(@object['type'])
  end

  def converted_object_type?
    CONVERTED_TYPES.include?(@object['type'])
  end

  def skip_download?
    return @skip_download if defined?(@skip_download)
    @skip_download ||= DomainBlock.find_by(domain: @account.domain)&.reject_media?
  end

  def reply_to_local?
    !replied_to_status.nil? && replied_to_status.account.local?
  end

  def forward_for_reply
    return unless @json['signature'].present? && reply_to_local?
    ActivityPub::RawDistributionWorker.perform_async(Oj.dump(@json), replied_to_status.account_id, [@account.preferred_inbox_url])
  end

  def lock_options
    { redis: Redis.current, key: "create:#{@object['id']}" }
  end
end