aec7de494f
* Fix trying to fetch posts from other users when fetching featured posts * Rate-limit discovery of new subdomains * Put a limit on recursively discovering new accounts
307 lines
10 KiB
Ruby
307 lines
10 KiB
Ruby
# frozen_string_literal: true
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class ActivityPub::ProcessStatusUpdateService < BaseService
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include JsonLdHelper
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include Redisable
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include Lockable
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def call(status, json, request_id: nil)
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raise ArgumentError, 'Status has unsaved changes' if status.changed?
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@json = json
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@status_parser = ActivityPub::Parser::StatusParser.new(@json)
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@uri = @status_parser.uri
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@status = status
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@account = status.account
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@media_attachments_changed = false
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@poll_changed = false
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@request_id = request_id
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# Only native types can be updated at the moment
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return @status if !expected_type? || already_updated_more_recently?
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if @status_parser.edited_at.present? && (@status.edited_at.nil? || @status_parser.edited_at > @status.edited_at)
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handle_explicit_update!
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else
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handle_implicit_update!
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end
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@status
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end
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private
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def handle_explicit_update!
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last_edit_date = @status.edited_at.presence || @status.created_at
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# Only allow processing one create/update per status at a time
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with_lock("create:#{@uri}") do
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Status.transaction do
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record_previous_edit!
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update_media_attachments!
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update_poll!
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update_immediate_attributes!
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update_metadata!
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create_edits!
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end
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queue_poll_notifications!
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next unless significant_changes?
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reset_preview_card!
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broadcast_updates!
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end
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forward_activity! if significant_changes? && @status_parser.edited_at > last_edit_date
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end
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def handle_implicit_update!
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with_lock("create:#{@uri}") do
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update_poll!(allow_significant_changes: false)
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queue_poll_notifications!
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end
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end
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def update_media_attachments!
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previous_media_attachments = @status.media_attachments.to_a
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previous_media_attachments_ids = @status.ordered_media_attachment_ids || previous_media_attachments.map(&:id)
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next_media_attachments = []
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as_array(@json['attachment']).each do |attachment|
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media_attachment_parser = ActivityPub::Parser::MediaAttachmentParser.new(attachment)
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next if media_attachment_parser.remote_url.blank? || next_media_attachments.size > 4
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begin
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media_attachment = previous_media_attachments.find { |previous_media_attachment| previous_media_attachment.remote_url == media_attachment_parser.remote_url }
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media_attachment ||= MediaAttachment.new(account: @account, remote_url: media_attachment_parser.remote_url)
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# If a previously existing media attachment was significantly updated, mark
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# media attachments as changed even if none were added or removed
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if media_attachment_parser.significantly_changes?(media_attachment)
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@media_attachments_changed = true
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end
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media_attachment.description = media_attachment_parser.description
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media_attachment.focus = media_attachment_parser.focus
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media_attachment.thumbnail_remote_url = media_attachment_parser.thumbnail_remote_url
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media_attachment.blurhash = media_attachment_parser.blurhash
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media_attachment.save!
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next_media_attachments << media_attachment
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next if unsupported_media_type?(media_attachment_parser.file_content_type) || skip_download?
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begin
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media_attachment.download_file! if media_attachment.remote_url_previously_changed?
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media_attachment.download_thumbnail! if media_attachment.thumbnail_remote_url_previously_changed?
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media_attachment.save
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rescue Mastodon::UnexpectedResponseError, HTTP::TimeoutError, HTTP::ConnectionError, OpenSSL::SSL::SSLError
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RedownloadMediaWorker.perform_in(rand(30..600).seconds, media_attachment.id)
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end
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rescue Addressable::URI::InvalidURIError => e
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Rails.logger.debug "Invalid URL in attachment: #{e}"
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end
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end
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added_media_attachments = next_media_attachments - previous_media_attachments
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MediaAttachment.where(id: added_media_attachments.map(&:id)).update_all(status_id: @status.id)
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@status.ordered_media_attachment_ids = next_media_attachments.map(&:id)
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@status.media_attachments.reload
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@media_attachments_changed = true if @status.ordered_media_attachment_ids != previous_media_attachments_ids
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end
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def update_poll!(allow_significant_changes: true)
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previous_poll = @status.preloadable_poll
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@previous_expires_at = previous_poll&.expires_at
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poll_parser = ActivityPub::Parser::PollParser.new(@json)
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if poll_parser.valid?
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poll = previous_poll || @account.polls.new(status: @status)
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# If for some reasons the options were changed, it invalidates all previous
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# votes, so we need to remove them
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@poll_changed = true if poll_parser.significantly_changes?(poll)
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return if @poll_changed && !allow_significant_changes
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poll.last_fetched_at = Time.now.utc
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poll.options = poll_parser.options
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poll.multiple = poll_parser.multiple
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poll.expires_at = poll_parser.expires_at
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poll.voters_count = poll_parser.voters_count
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poll.cached_tallies = poll_parser.cached_tallies
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poll.reset_votes! if @poll_changed
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poll.save!
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@status.poll_id = poll.id
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elsif previous_poll.present?
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return unless allow_significant_changes
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previous_poll.destroy!
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@poll_changed = true
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@status.poll_id = nil
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end
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end
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def update_immediate_attributes!
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@status.text = @status_parser.text || ''
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@status.spoiler_text = @status_parser.spoiler_text || ''
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@status.sensitive = @account.sensitized? || @status_parser.sensitive || false
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@status.language = @status_parser.language
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@significant_changes = text_significantly_changed? || @status.spoiler_text_changed? || @media_attachments_changed || @poll_changed
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@status.edited_at = @status_parser.edited_at if significant_changes?
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@status.save!
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end
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def update_metadata!
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@raw_tags = []
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@raw_mentions = []
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@raw_emojis = []
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as_array(@json['tag']).each do |tag|
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if equals_or_includes?(tag['type'], 'Hashtag')
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@raw_tags << tag['name']
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elsif equals_or_includes?(tag['type'], 'Mention')
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@raw_mentions << tag['href']
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elsif equals_or_includes?(tag['type'], 'Emoji')
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@raw_emojis << tag
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end
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end
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update_tags!
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update_mentions!
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update_emojis!
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end
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def update_tags!
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@status.tags = Tag.find_or_create_by_names(@raw_tags)
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end
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def update_mentions!
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previous_mentions = @status.active_mentions.includes(:account).to_a
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current_mentions = []
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@raw_mentions.each do |href|
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next if href.blank?
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account = ActivityPub::TagManager.instance.uri_to_resource(href, Account)
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account ||= ActivityPub::FetchRemoteAccountService.new.call(href, request_id: @request_id)
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next if account.nil?
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mention = previous_mentions.find { |x| x.account_id == account.id }
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mention ||= account.mentions.new(status: @status)
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current_mentions << mention
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end
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current_mentions.each do |mention|
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mention.save if mention.new_record?
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end
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# If previous mentions are no longer contained in the text, convert them
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# to silent mentions, since withdrawing access from someone who already
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# received a notification might be more confusing
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removed_mentions = previous_mentions - current_mentions
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Mention.where(id: removed_mentions.map(&:id)).update_all(silent: true) unless removed_mentions.empty?
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end
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def update_emojis!
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return if skip_download?
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@raw_emojis.each do |raw_emoji|
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custom_emoji_parser = ActivityPub::Parser::CustomEmojiParser.new(raw_emoji)
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next if custom_emoji_parser.shortcode.blank? || custom_emoji_parser.image_remote_url.blank?
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emoji = CustomEmoji.find_by(shortcode: custom_emoji_parser.shortcode, domain: @account.domain)
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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)
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begin
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emoji ||= CustomEmoji.new(domain: @account.domain, shortcode: custom_emoji_parser.shortcode, uri: custom_emoji_parser.uri)
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emoji.image_remote_url = custom_emoji_parser.image_remote_url
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emoji.save
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rescue Seahorse::Client::NetworkingError => e
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Rails.logger.warn "Error storing emoji: #{e}"
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end
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end
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end
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def expected_type?
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equals_or_includes_any?(@json['type'], %w(Note Question))
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end
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def record_previous_edit!
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@previous_edit = @status.build_snapshot(at_time: @status.created_at, rate_limit: false) if @status.edits.empty?
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end
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def create_edits!
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return unless significant_changes?
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@previous_edit&.save!
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@status.snapshot!(account_id: @account.id, rate_limit: false)
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end
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def skip_download?
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return @skip_download if defined?(@skip_download)
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@skip_download ||= DomainBlock.reject_media?(@account.domain)
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end
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def unsupported_media_type?(mime_type)
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mime_type.present? && !MediaAttachment.supported_mime_types.include?(mime_type)
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end
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def significant_changes?
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@significant_changes
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end
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def text_significantly_changed?
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return false unless @status.text_changed?
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old, new = @status.text_change
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HtmlAwareFormatter.new(old, false).to_s != HtmlAwareFormatter.new(new, false).to_s
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end
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def already_updated_more_recently?
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@status.edited_at.present? && @status_parser.edited_at.present? && @status.edited_at > @status_parser.edited_at
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end
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def reset_preview_card!
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@status.preview_cards.clear
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LinkCrawlWorker.perform_in(rand(1..59).seconds, @status.id)
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end
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def broadcast_updates!
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::DistributionWorker.perform_async(@status.id, { 'update' => true })
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end
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def queue_poll_notifications!
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poll = @status.preloadable_poll
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# If the poll had no expiration date set but now has, or now has a sooner
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# expiration date, and people have voted, schedule a notification
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return unless poll.present? && poll.expires_at.present? && poll.votes.exists?
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PollExpirationNotifyWorker.remove_from_scheduled(poll.id) if @previous_expires_at.present? && @previous_expires_at > poll.expires_at
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PollExpirationNotifyWorker.perform_at(poll.expires_at + 5.minutes, poll.id)
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end
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def forward_activity!
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forwarder.forward! if forwarder.forwardable?
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end
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def forwarder
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@forwarder ||= ActivityPub::Forwarder.new(@account, @json, @status)
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end
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end
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