hometown/app/lib/activitypub/activity.rb
puckipedia d2919f7e94 Allow Accept/Reject with a non-embedded object (#12199)
Some ActivityPub servers refuse to embed remote objects into their own
output. This is because they are not the authoritative source for these
objects, and as such embedding them is always a waste of space. The
follow request and follow models contain a URI, so this can be used to
match them.
2019-10-24 22:45:43 +02:00

196 lines
5.3 KiB
Ruby

# frozen_string_literal: true
class ActivityPub::Activity
include JsonLdHelper
include Redisable
SUPPORTED_TYPES = %w(Note Question).freeze
CONVERTED_TYPES = %w(Image Audio Video Article Page).freeze
def initialize(json, account, **options)
@json = json
@account = account
@object = @json['object']
@options = options
end
def perform
raise NotImplementedError
end
class << self
def factory(json, account, **options)
@json = json
klass&.new(json, account, options)
end
private
def klass
case @json['type']
when 'Create'
ActivityPub::Activity::Create
when 'Announce'
ActivityPub::Activity::Announce
when 'Delete'
ActivityPub::Activity::Delete
when 'Follow'
ActivityPub::Activity::Follow
when 'Like'
ActivityPub::Activity::Like
when 'Block'
ActivityPub::Activity::Block
when 'Update'
ActivityPub::Activity::Update
when 'Undo'
ActivityPub::Activity::Undo
when 'Accept'
ActivityPub::Activity::Accept
when 'Reject'
ActivityPub::Activity::Reject
when 'Flag'
ActivityPub::Activity::Flag
when 'Add'
ActivityPub::Activity::Add
when 'Remove'
ActivityPub::Activity::Remove
when 'Move'
ActivityPub::Activity::Move
end
end
end
protected
def status_from_uri(uri)
ActivityPub::TagManager.instance.uri_to_resource(uri, Status)
end
def account_from_uri(uri)
ActivityPub::TagManager.instance.uri_to_resource(uri, Account)
end
def object_uri
@object_uri ||= value_or_id(@object)
end
def unsupported_object_type?
@object.is_a?(String) || !(supported_object_type? || converted_object_type?)
end
def supported_object_type?
equals_or_includes_any?(@object['type'], SUPPORTED_TYPES)
end
def converted_object_type?
equals_or_includes_any?(@object['type'], CONVERTED_TYPES)
end
def distribute(status)
crawl_links(status)
notify_about_reblog(status) if reblog_of_local_account?(status)
notify_about_mentions(status)
# Only continue if the status is supposed to have arrived in real-time.
# Note that if @options[:override_timestamps] isn't set, the status
# may have a lower snowflake id than other existing statuses, potentially
# "hiding" it from paginated API calls
return unless @options[:override_timestamps] || status.within_realtime_window?
distribute_to_followers(status)
end
def reblog_of_local_account?(status)
status.reblog? && status.reblog.account.local?
end
def notify_about_reblog(status)
NotifyService.new.call(status.reblog.account, status)
end
def notify_about_mentions(status)
status.active_mentions.includes(:account).each do |mention|
next unless mention.account.local? && audience_includes?(mention.account)
NotifyService.new.call(mention.account, mention)
end
end
def crawl_links(status)
return if status.spoiler_text?
# Spread out crawling randomly to avoid DDoSing the link
LinkCrawlWorker.perform_in(rand(1..59).seconds, status.id)
end
def distribute_to_followers(status)
::DistributionWorker.perform_async(status.id)
end
def delete_arrived_first?(uri)
redis.exists("delete_upon_arrival:#{@account.id}:#{uri}")
end
def delete_later!(uri)
redis.setex("delete_upon_arrival:#{@account.id}:#{uri}", 6.hours.seconds, uri)
end
def status_from_object
# If the status is already known, return it
status = status_from_uri(object_uri)
return status unless status.nil?
# If the boosted toot is embedded and it is a self-boost, handle it like a Create
unless unsupported_object_type?
actor_id = value_or_id(first_of_value(@object['attributedTo']))
if actor_id == @account.uri
return ActivityPub::Activity.factory({ 'type' => 'Create', 'actor' => actor_id, 'object' => @object }, @account).perform
end
end
fetch_remote_original_status
end
def follow_request_from_object
@follow_request ||= FollowRequest.find_by(target_account: @account, uri: object_uri) unless object_uri.nil?
end
def follow_from_object
@follow ||= Follow.find_by(target_account: @account, uri: object_uri) unless object_uri.nil?
end
def fetch_remote_original_status
if object_uri.start_with?('http')
return if ActivityPub::TagManager.instance.local_uri?(object_uri)
ActivityPub::FetchRemoteStatusService.new.call(object_uri, id: true, on_behalf_of: @account.followers.local.first)
elsif @object['url'].present?
::FetchRemoteStatusService.new.call(@object['url'])
end
end
def lock_or_return(key, expire_after = 7.days.seconds)
yield if redis.set(key, true, nx: true, ex: expire_after)
ensure
redis.del(key)
end
def fetch?
!@options[:delivery]
end
def followed_by_local_accounts?
@account.passive_relationships.exists?
end
def requested_through_relay?
@options[:relayed_through_account] && Relay.find_by(inbox_url: @options[:relayed_through_account].inbox_url)&.enabled?
end
def reject_payload!
Rails.logger.info("Rejected #{@json['type']} activity #{@json['id']} from #{@account.uri}#{@options[:relayed_through_account] && "via #{@options[:relayed_through_account].uri}"}")
nil
end
end