app/services/activitypub/process_status_update_service.rb
# frozen_string_literal: true
class ActivityPub::ProcessStatusUpdateService < BaseService
include JsonLdHelper
include Redisable
include Lockable
def call(status, activity_json, object_json, request_id: nil)
raise ArgumentError, 'Status has unsaved changes' if status.changed?
@activity_json = activity_json
@json = object_json
@status_parser = ActivityPub::Parser::StatusParser.new(@json)
@uri = @status_parser.uri
@status = status
@account = status.account
@media_attachments_changed = false
@poll_changed = false
@request_id = request_id
# Only native types can be updated at the moment
return @status if !expected_type? || already_updated_more_recently?
if @status_parser.edited_at.present? && (@status.edited_at.nil? || @status_parser.edited_at > @status.edited_at)
handle_explicit_update!
else
handle_implicit_update!
end
@status
end
private
def handle_explicit_update!
last_edit_date = @status.edited_at.presence || @status.created_at
# Only allow processing one create/update per status at a time
with_redis_lock("create:#{@uri}") do
Status.transaction do
record_previous_edit!
update_media_attachments!
update_poll!
update_immediate_attributes!
update_metadata!
create_edits!
end
download_media_files!
queue_poll_notifications!
next unless significant_changes?
reset_preview_card!
broadcast_updates!
end
forward_activity! if significant_changes? && @status_parser.edited_at > last_edit_date
end
def handle_implicit_update!
with_redis_lock("create:#{@uri}") do
update_poll!(allow_significant_changes: false)
queue_poll_notifications!
end
end
def update_media_attachments!
previous_media_attachments = @status.media_attachments.to_a
previous_media_attachments_ids = @status.ordered_media_attachment_ids || previous_media_attachments.map(&:id)
@next_media_attachments = []
as_array(@json['attachment']).each do |attachment|
media_attachment_parser = ActivityPub::Parser::MediaAttachmentParser.new(attachment)
next if media_attachment_parser.remote_url.blank? || @next_media_attachments.size > 4
begin
media_attachment = previous_media_attachments.find { |previous_media_attachment| previous_media_attachment.remote_url == media_attachment_parser.remote_url }
media_attachment ||= MediaAttachment.new(account: @account, remote_url: media_attachment_parser.remote_url)
# If a previously existing media attachment was significantly updated, mark
# media attachments as changed even if none were added or removed
@media_attachments_changed = true if media_attachment_parser.significantly_changes?(media_attachment)
media_attachment.description = media_attachment_parser.description
media_attachment.focus = media_attachment_parser.focus
media_attachment.thumbnail_remote_url = media_attachment_parser.thumbnail_remote_url
media_attachment.blurhash = media_attachment_parser.blurhash
media_attachment.status_id = @status.id
media_attachment.skip_download = unsupported_media_type?(media_attachment_parser.file_content_type) || skip_download?
media_attachment.save!
@next_media_attachments << media_attachment
rescue Addressable::URI::InvalidURIError => e
Rails.logger.debug { "Invalid URL in attachment: #{e}" }
end
end
@status.ordered_media_attachment_ids = @next_media_attachments.map(&:id)
@media_attachments_changed = true if @status.ordered_media_attachment_ids != previous_media_attachments_ids
end
def download_media_files!
@next_media_attachments.each do |media_attachment|
next if media_attachment.skip_download
media_attachment.download_file! if media_attachment.remote_url_previously_changed?
media_attachment.download_thumbnail! if media_attachment.thumbnail_remote_url_previously_changed?
media_attachment.save
rescue Mastodon::UnexpectedResponseError, HTTP::TimeoutError, HTTP::ConnectionError, OpenSSL::SSL::SSLError
RedownloadMediaWorker.perform_in(rand(30..600).seconds, media_attachment.id)
rescue Seahorse::Client::NetworkingError => e
Rails.logger.warn "Error storing media attachment: #{e}"
end
@status.media_attachments.reload
end
def update_poll!(allow_significant_changes: true)
previous_poll = @status.preloadable_poll
@previous_expires_at = previous_poll&.expires_at
poll_parser = ActivityPub::Parser::PollParser.new(@json)
if poll_parser.valid?
poll = previous_poll || @account.polls.new(status: @status)
# If for some reasons the options were changed, it invalidates all previous
# votes, so we need to remove them
@poll_changed = true if poll_parser.significantly_changes?(poll)
return if @poll_changed && !allow_significant_changes
poll.last_fetched_at = Time.now.utc
poll.options = poll_parser.options
poll.multiple = poll_parser.multiple
poll.expires_at = poll_parser.expires_at
poll.voters_count = poll_parser.voters_count
poll.cached_tallies = poll_parser.cached_tallies
poll.reset_votes! if @poll_changed
poll.save!
@status.poll_id = poll.id
elsif previous_poll.present?
return unless allow_significant_changes
previous_poll.destroy!
@poll_changed = true
@status.poll_id = nil
end
end
def update_immediate_attributes!
@status.text = @status_parser.text || ''
@status.spoiler_text = @status_parser.spoiler_text || ''
@status.sensitive = @account.sensitized? || @status_parser.sensitive || false
@status.language = @status_parser.language
@significant_changes = text_significantly_changed? || @status.spoiler_text_changed? || @media_attachments_changed || @poll_changed
@status.edited_at = @status_parser.edited_at if significant_changes?
@status.save!
end
def update_metadata!
@raw_tags = []
@raw_mentions = []
@raw_emojis = []
as_array(@json['tag']).each do |tag|
if equals_or_includes?(tag['type'], 'Hashtag')
@raw_tags << tag['name'] if tag['name'].present?
elsif equals_or_includes?(tag['type'], 'Mention')
@raw_mentions << tag['href'] if tag['href'].present?
elsif equals_or_includes?(tag['type'], 'Emoji')
@raw_emojis << tag
end
end
update_tags!
update_mentions!
update_emojis!
end
def update_tags!
@status.tags = Tag.find_or_create_by_names(@raw_tags)
end
def update_mentions!
previous_mentions = @status.active_mentions.includes(:account).to_a
current_mentions = []
@raw_mentions.each do |href|
next if href.blank?
account = ActivityPub::TagManager.instance.uri_to_resource(href, Account)
account ||= ActivityPub::FetchRemoteAccountService.new.call(href, request_id: @request_id)
next if account.nil?
mention = previous_mentions.find { |x| x.account_id == account.id }
mention ||= account.mentions.new(status: @status)
current_mentions << mention
end
current_mentions.each do |mention|
mention.save if mention.new_record?
end
# If previous mentions are no longer contained in the text, convert them
# to silent mentions, since withdrawing access from someone who already
# received a notification might be more confusing
removed_mentions = previous_mentions - current_mentions
Mention.where(id: removed_mentions.map(&:id)).update_all(silent: true) unless removed_mentions.empty?
end
def update_emojis!
return if skip_download?
@raw_emojis.each do |raw_emoji|
custom_emoji_parser = ActivityPub::Parser::CustomEmojiParser.new(raw_emoji)
next if custom_emoji_parser.shortcode.blank? || custom_emoji_parser.image_remote_url.blank?
emoji = CustomEmoji.find_by(shortcode: custom_emoji_parser.shortcode, domain: @account.domain)
next unless emoji.nil? || custom_emoji_parser.image_remote_url != emoji.image_remote_url || (custom_emoji_parser.updated_at && custom_emoji_parser.updated_at >= emoji.updated_at)
begin
emoji ||= CustomEmoji.new(domain: @account.domain, shortcode: custom_emoji_parser.shortcode, uri: custom_emoji_parser.uri)
emoji.image_remote_url = custom_emoji_parser.image_remote_url
emoji.save
rescue Seahorse::Client::NetworkingError => e
Rails.logger.warn "Error storing emoji: #{e}"
end
end
end
def expected_type?
equals_or_includes_any?(@json['type'], %w(Note Question))
end
def record_previous_edit!
@previous_edit = @status.build_snapshot(at_time: @status.created_at, rate_limit: false) if @status.edits.empty?
end
def create_edits!
return unless significant_changes?
@previous_edit&.save!
@status.snapshot!(account_id: @account.id, rate_limit: false)
end
def skip_download?
return @skip_download if defined?(@skip_download)
@skip_download ||= DomainBlock.reject_media?(@account.domain)
end
def unsupported_media_type?(mime_type)
mime_type.present? && !MediaAttachment.supported_mime_types.include?(mime_type)
end
def significant_changes?
@significant_changes
end
def text_significantly_changed?
return false unless @status.text_changed?
old, new = @status.text_change
HtmlAwareFormatter.new(old, false).to_s != HtmlAwareFormatter.new(new, false).to_s
end
def already_updated_more_recently?
@status.edited_at.present? && @status_parser.edited_at.present? && @status.edited_at > @status_parser.edited_at
end
def reset_preview_card!
@status.reset_preview_card!
LinkCrawlWorker.perform_in(rand(1..59).seconds, @status.id)
end
def broadcast_updates!
::DistributionWorker.perform_async(@status.id, { 'update' => true })
end
def queue_poll_notifications!
poll = @status.preloadable_poll
# If the poll had no expiration date set but now has, or now has a sooner
# expiration date, and people have voted, schedule a notification
return unless poll.present? && poll.expires_at.present? && poll.votes.exists?
PollExpirationNotifyWorker.remove_from_scheduled(poll.id) if @previous_expires_at.present? && @previous_expires_at > poll.expires_at
PollExpirationNotifyWorker.perform_at(poll.expires_at + 5.minutes, poll.id)
end
def forward_activity!
forwarder.forward! if forwarder.forwardable?
end
def forwarder
@forwarder ||= ActivityPub::Forwarder.new(@account, @activity_json, @status)
end
end