about summary refs log tree commit diff
path: root/app/lib/ostatus/activity/creation.rb
blob: a1ab522e23c3d9b0746bc492bc566efd61b8d2a7 (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
# frozen_string_literal: true

class OStatus::Activity::Creation < OStatus::Activity::Base
  def perform
    if redis.exists("delete_upon_arrival:#{@account.id}:#{id}")
      Rails.logger.debug "Delete for status #{id} was queued, ignoring"
      return [nil, false]
    end

    return [nil, false] if @account.suspended?

    RedisLock.acquire(lock_options) do |lock|
      if lock.acquired?
        # Return early if status already exists in db
        @status = find_status(id)
        return [@status, false] unless @status.nil?
        @status = process_status
      end
    end

    [@status, true]
  end

  def process_status
    Rails.logger.debug "Creating remote status #{id}"
    cached_reblog = reblog
    status = nil

    ApplicationRecord.transaction do
      status = Status.create!(
        uri: id,
        url: url,
        account: @account,
        reblog: cached_reblog,
        text: content,
        spoiler_text: content_warning,
        created_at: @options[:override_timestamps] ? nil : published,
        reply: thread?,
        language: content_language,
        visibility: visibility_scope,
        conversation: find_or_create_conversation,
        thread: thread? ? find_status(thread.first) || find_activitypub_status(thread.first, thread.second) : nil
      )

      save_mentions(status)
      save_hashtags(status)
      save_media(status)
      save_emojis(status)
    end

    if thread? && status.thread.nil?
      Rails.logger.debug "Trying to attach #{status.id} (#{id}) to #{thread.first}"
      ThreadResolveWorker.perform_async(status.id, thread.second)
    end

    Rails.logger.debug "Queuing remote status #{status.id} (#{id}) for distribution"

    LinkCrawlWorker.perform_async(status.id) unless status.spoiler_text?
    DistributionWorker.perform_async(status.id)

    status
  end

  def content
    @xml.at_xpath('./xmlns:content', xmlns: OStatus::TagManager::XMLNS).content
  end

  def content_language
    @xml.at_xpath('./xmlns:content', xmlns: OStatus::TagManager::XMLNS)['xml:lang']&.presence || 'en'
  end

  def content_warning
    @xml.at_xpath('./xmlns:summary', xmlns: OStatus::TagManager::XMLNS)&.content || ''
  end

  def visibility_scope
    @xml.at_xpath('./mastodon:scope', mastodon: OStatus::TagManager::MTDN_XMLNS)&.content&.to_sym || :public
  end

  def published
    @xml.at_xpath('./xmlns:published', xmlns: OStatus::TagManager::XMLNS).content
  end

  def thread?
    !@xml.at_xpath('./thr:in-reply-to', thr: OStatus::TagManager::THR_XMLNS).nil?
  end

  def thread
    thr = @xml.at_xpath('./thr:in-reply-to', thr: OStatus::TagManager::THR_XMLNS)
    [thr['ref'], thr['href']]
  end

  private

  def find_or_create_conversation
    uri = @xml.at_xpath('./ostatus:conversation', ostatus: OStatus::TagManager::OS_XMLNS)&.attribute('ref')&.content
    return if uri.nil?

    if OStatus::TagManager.instance.local_id?(uri)
      local_id = OStatus::TagManager.instance.unique_tag_to_local_id(uri, 'Conversation')
      return Conversation.find_by(id: local_id)
    end

    Conversation.find_by(uri: uri) || Conversation.create!(uri: uri)
  end

  def save_mentions(parent)
    processed_account_ids = []

    @xml.xpath('./xmlns:link[@rel="mentioned"]', xmlns: OStatus::TagManager::XMLNS).each do |link|
      next if [OStatus::TagManager::TYPES[:group], OStatus::TagManager::TYPES[:collection]].include? link['ostatus:object-type']

      mentioned_account = account_from_href(link['href'])

      next if mentioned_account.nil? || processed_account_ids.include?(mentioned_account.id)

      mentioned_account.mentions.where(status: parent).first_or_create(status: parent)

      # So we can skip duplicate mentions
      processed_account_ids << mentioned_account.id
    end
  end

  def save_hashtags(parent)
    tags = @xml.xpath('./xmlns:category', xmlns: OStatus::TagManager::XMLNS).map { |category| category['term'] }.select(&:present?)
    ProcessHashtagsService.new.call(parent, tags)
  end

  def save_media(parent)
    do_not_download = DomainBlock.find_by(domain: parent.account.domain)&.reject_media?

    @xml.xpath('./xmlns:link[@rel="enclosure"]', xmlns: OStatus::TagManager::XMLNS).each do |link|
      next unless link['href']

      media = MediaAttachment.where(status: parent, remote_url: link['href']).first_or_initialize(account: parent.account, status: parent, remote_url: link['href'])
      parsed_url = Addressable::URI.parse(link['href']).normalize

      next if !%w(http https).include?(parsed_url.scheme) || parsed_url.host.empty?

      media.save

      next if do_not_download

      begin
        media.file_remote_url = link['href']
        media.save!
      rescue ActiveRecord::RecordInvalid
        next
      end
    end
  end

  def save_emojis(parent)
    do_not_download = DomainBlock.find_by(domain: parent.account.domain)&.reject_media?

    return if do_not_download

    @xml.xpath('./xmlns:link[@rel="emoji"]', xmlns: OStatus::TagManager::XMLNS).each do |link|
      next unless link['href'] && link['name']

      shortcode = link['name'].delete(':')
      emoji     = CustomEmoji.find_by(shortcode: shortcode, domain: parent.account.domain)

      next unless emoji.nil?

      emoji = CustomEmoji.new(shortcode: shortcode, domain: parent.account.domain)
      emoji.image_remote_url = link['href']
      emoji.save
    end
  end

  def account_from_href(href)
    url = Addressable::URI.parse(href).normalize

    if TagManager.instance.web_domain?(url.host)
      Account.find_local(url.path.gsub('/users/', ''))
    else
      Account.where(uri: href).or(Account.where(url: href)).first || FetchRemoteAccountService.new.call(href)
    end
  end

  def lock_options
    { redis: Redis.current, key: "create:#{id}" }
  end
end