429 lines
14 KiB
Ruby
429 lines
14 KiB
Ruby
# frozen_string_literal: true
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class ActivityPub::Activity::Create < ActivityPub::Activity
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include FormattingHelper
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def perform
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dereference_object!
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case @object['type']
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when 'EncryptedMessage'
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create_encrypted_message
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else
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create_status
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end
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end
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private
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def create_encrypted_message
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return reject_payload! if invalid_origin?(object_uri) || @options[:delivered_to_account_id].blank?
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target_account = Account.find(@options[:delivered_to_account_id])
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target_device = target_account.devices.find_by(device_id: @object.dig('to', 'deviceId'))
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return if target_device.nil?
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target_device.encrypted_messages.create!(
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from_account: @account,
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from_device_id: @object.dig('attributedTo', 'deviceId'),
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type: @object['messageType'],
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body: @object['cipherText'],
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digest: @object.dig('digest', 'digestValue'),
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message_franking: message_franking.to_token
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)
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end
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def message_franking
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MessageFranking.new(
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hmac: @object.dig('digest', 'digestValue'),
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original_franking: @object['messageFranking'],
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source_account_id: @account.id,
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target_account_id: @options[:delivered_to_account_id],
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timestamp: Time.now.utc
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)
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end
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def create_status
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return reject_payload! if unsupported_object_type? || invalid_origin?(object_uri) || tombstone_exists? || !related_to_local_activity?
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with_lock("create:#{object_uri}") do
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return if delete_arrived_first?(object_uri) || poll_vote?
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@status = find_existing_status
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if @status.nil?
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process_status
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elsif @options[:delivered_to_account_id].present?
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postprocess_audience_and_deliver
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end
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end
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@status
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end
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def audience_to
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as_array(@object['to'] || @json['to']).map { |x| value_or_id(x) }
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end
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def audience_cc
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as_array(@object['cc'] || @json['cc']).map { |x| value_or_id(x) }
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end
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def process_status
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@tags = []
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@mentions = []
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@silenced_account_ids = []
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@params = {}
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process_status_params
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process_tags
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process_audience
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ApplicationRecord.transaction do
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@status = Status.create!(@params)
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attach_tags(@status)
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end
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resolve_thread(@status)
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fetch_replies(@status)
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distribute
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forward_for_reply
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end
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def distribute
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# Spread out crawling randomly to avoid DDoSing the link
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LinkCrawlWorker.perform_in(rand(1..59).seconds, @status.id)
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# Distribute into home and list feeds and notify mentioned accounts
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::DistributionWorker.perform_async(@status.id, { 'silenced_account_ids' => @silenced_account_ids }) if @options[:override_timestamps] || @status.within_realtime_window?
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end
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def find_existing_status
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status = status_from_uri(object_uri)
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status ||= Status.find_by(uri: @object['atomUri']) if @object['atomUri'].present?
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status
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end
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def process_status_params
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@status_parser = ActivityPub::Parser::StatusParser.new(@json, followers_collection: @account.followers_url)
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@params = begin
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{
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uri: @status_parser.uri,
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url: @status_parser.url || @status_parser.uri,
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account: @account,
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text: converted_object_type? ? converted_text : (@status_parser.text || ''),
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language: @status_parser.language,
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spoiler_text: converted_object_type? ? '' : (@status_parser.spoiler_text || ''),
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created_at: @status_parser.created_at,
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edited_at: @status_parser.edited_at && @status_parser.edited_at != @status_parser.created_at ? @status_parser.edited_at : nil,
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override_timestamps: @options[:override_timestamps],
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reply: @status_parser.reply,
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sensitive: @account.sensitized? || @status_parser.sensitive || false,
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visibility: @status_parser.visibility,
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thread: replied_to_status,
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conversation: conversation_from_uri(@object['conversation']),
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media_attachment_ids: process_attachments.take(4).map(&:id),
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poll: process_poll,
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}
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end
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end
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def process_audience
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# Unlike with tags, there is no point in resolving accounts we don't already
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# know here, because silent mentions would only be used for local access control anyway
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accounts_in_audience = (audience_to + audience_cc).uniq.filter_map do |audience|
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account_from_uri(audience) unless ActivityPub::TagManager.instance.public_collection?(audience)
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end
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# If the payload was delivered to a specific inbox, the inbox owner must have
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# access to it, unless they already have access to it anyway
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if @options[:delivered_to_account_id]
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accounts_in_audience << delivered_to_account
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accounts_in_audience.uniq!
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end
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accounts_in_audience.each do |account|
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# This runs after tags are processed, and those translate into non-silent
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# mentions, which take precedence
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next if @mentions.any? { |mention| mention.account_id == account.id }
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@mentions << Mention.new(account: account, silent: true)
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# If there is at least one silent mention, then the status can be considered
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# as a limited-audience status, and not strictly a direct message, but only
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# if we considered a direct message in the first place
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@params[:visibility] = :limited if @params[:visibility] == :direct
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end
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# Accounts that are tagged but are not in the audience are not
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# supposed to be notified explicitly
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@silenced_account_ids = @mentions.map(&:account_id) - accounts_in_audience.map(&:id)
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end
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def postprocess_audience_and_deliver
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return if @status.mentions.find_by(account_id: @options[:delivered_to_account_id])
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@status.mentions.create(account: delivered_to_account, silent: true)
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@status.update(visibility: :limited) if @status.direct_visibility?
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return unless delivered_to_account.following?(@account)
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FeedInsertWorker.perform_async(@status.id, delivered_to_account.id, 'home')
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end
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def delivered_to_account
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@delivered_to_account ||= Account.find(@options[:delivered_to_account_id])
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end
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def attach_tags(status)
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@tags.each do |tag|
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status.tags << tag
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tag.update(last_status_at: status.created_at) if tag.last_status_at.nil? || (tag.last_status_at < status.created_at && tag.last_status_at < 12.hours.ago)
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end
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# If we're processing an old status, this may register tags as being used now
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# as opposed to when the status was really published, but this is probably
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# not a big deal
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Trends.tags.register(status)
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@mentions.each do |mention|
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mention.status = status
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mention.save
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end
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end
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def process_tags
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return if @object['tag'].nil?
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as_array(@object['tag']).each do |tag|
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if equals_or_includes?(tag['type'], 'Hashtag')
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process_hashtag tag
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elsif equals_or_includes?(tag['type'], 'Mention')
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process_mention tag
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elsif equals_or_includes?(tag['type'], 'Emoji')
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process_emoji tag
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end
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end
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end
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def process_hashtag(tag)
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return if tag['name'].blank?
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Tag.find_or_create_by_names(tag['name']) do |hashtag|
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@tags << hashtag unless @tags.include?(hashtag) || !hashtag.valid?
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end
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rescue ActiveRecord::RecordInvalid
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nil
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end
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def process_mention(tag)
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return if tag['href'].blank?
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account = account_from_uri(tag['href'])
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account = ActivityPub::FetchRemoteAccountService.new.call(tag['href'], request_id: @options[:request_id]) if account.nil?
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return if account.nil?
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@mentions << Mention.new(account: account, silent: false)
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end
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def process_emoji(tag)
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return if skip_download?
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custom_emoji_parser = ActivityPub::Parser::CustomEmojiParser.new(tag)
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return 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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return 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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def process_attachments
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return [] if @object['attachment'].nil?
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media_attachments = []
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as_array(@object['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? || media_attachments.size >= 4
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begin
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media_attachment = MediaAttachment.create(
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account: @account,
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remote_url: media_attachment_parser.remote_url,
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thumbnail_remote_url: media_attachment_parser.thumbnail_remote_url,
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description: media_attachment_parser.description,
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focus: media_attachment_parser.focus,
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blurhash: media_attachment_parser.blurhash
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)
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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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media_attachment.download_file!
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media_attachment.download_thumbnail!
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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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rescue Seahorse::Client::NetworkingError => e
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Rails.logger.warn "Error storing media attachment: #{e}"
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end
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end
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media_attachments
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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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media_attachments
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end
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def process_poll
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poll_parser = ActivityPub::Parser::PollParser.new(@object)
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return unless poll_parser.valid?
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@account.polls.new(
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multiple: poll_parser.multiple,
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expires_at: poll_parser.expires_at,
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options: poll_parser.options,
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cached_tallies: poll_parser.cached_tallies,
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voters_count: poll_parser.voters_count
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)
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end
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def poll_vote?
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return false if replied_to_status.nil? || replied_to_status.preloadable_poll.nil? || !replied_to_status.local? || !replied_to_status.preloadable_poll.options.include?(@object['name'])
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poll_vote! unless replied_to_status.preloadable_poll.expired?
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true
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end
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def poll_vote!
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poll = replied_to_status.preloadable_poll
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already_voted = true
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with_lock("vote:#{replied_to_status.poll_id}:#{@account.id}") do
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already_voted = poll.votes.where(account: @account).exists?
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poll.votes.create!(account: @account, choice: poll.options.index(@object['name']), uri: object_uri)
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end
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increment_voters_count! unless already_voted
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ActivityPub::DistributePollUpdateWorker.perform_in(3.minutes, replied_to_status.id) unless replied_to_status.preloadable_poll.hide_totals?
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end
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def resolve_thread(status)
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return unless status.reply? && status.thread.nil? && Request.valid_url?(in_reply_to_uri)
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ThreadResolveWorker.perform_async(status.id, in_reply_to_uri)
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end
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def fetch_replies(status)
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collection = @object['replies']
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return if collection.nil?
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replies = ActivityPub::FetchRepliesService.new.call(status, collection, false)
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return unless replies.nil?
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uri = value_or_id(collection)
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ActivityPub::FetchRepliesWorker.perform_async(status.id, uri) unless uri.nil?
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end
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def conversation_from_uri(uri)
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return nil if uri.nil?
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return Conversation.find_by(id: OStatus::TagManager.instance.unique_tag_to_local_id(uri, 'Conversation')) if OStatus::TagManager.instance.local_id?(uri)
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begin
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Conversation.find_or_create_by!(uri: uri)
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rescue ActiveRecord::RecordInvalid, ActiveRecord::RecordNotUnique
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retry
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end
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end
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def replied_to_status
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return @replied_to_status if defined?(@replied_to_status)
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if in_reply_to_uri.blank?
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@replied_to_status = nil
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else
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@replied_to_status = status_from_uri(in_reply_to_uri)
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@replied_to_status ||= status_from_uri(@object['inReplyToAtomUri']) if @object['inReplyToAtomUri'].present?
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@replied_to_status
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end
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end
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def in_reply_to_uri
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value_or_id(@object['inReplyTo'])
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end
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def converted_text
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linkify([@status_parser.title.presence, @status_parser.spoiler_text.presence, @status_parser.url || @status_parser.uri].compact.join("\n\n"))
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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 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 reply_to_local?
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!replied_to_status.nil? && replied_to_status.account.local?
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end
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def related_to_local_activity?
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fetch? || followed_by_local_accounts? || requested_through_relay? ||
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responds_to_followed_account? || addresses_local_accounts?
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end
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def responds_to_followed_account?
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!replied_to_status.nil? && (replied_to_status.account.local? || replied_to_status.account.passive_relationships.exists?)
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end
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def addresses_local_accounts?
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return true if @options[:delivered_to_account_id]
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local_usernames = (audience_to + audience_cc).uniq.select { |uri| ActivityPub::TagManager.instance.local_uri?(uri) }.map { |uri| ActivityPub::TagManager.instance.uri_to_local_id(uri, :username) }
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return false if local_usernames.empty?
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Account.local.where(username: local_usernames).exists?
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end
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def tombstone_exists?
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Tombstone.exists?(uri: object_uri)
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end
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def forward_for_reply
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return unless @status.distributable? && @json['signature'].present? && reply_to_local?
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ActivityPub::RawDistributionWorker.perform_async(Oj.dump(@json), replied_to_status.account_id, [@account.preferred_inbox_url])
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end
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def increment_voters_count!
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poll = replied_to_status.preloadable_poll
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unless poll.voters_count.nil?
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poll.voters_count = poll.voters_count + 1
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poll.save
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end
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rescue ActiveRecord::StaleObjectError
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poll.reload
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retry
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end
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end
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