mastodon/app/services/remove_status_service.rb
Eugen Rochko e7e099d1a0
Fix deletes not reaching every server that interacted with status (#15200)
Extract logic for determining ActivityPub inboxes to send deletes
to to its own class and explicitly include the person the status
replied to (even if not mentioned), people who favourited it, and
people who replied to it (though that one is still not recursive)
2020-11-27 15:48:31 +01:00

174 lines
5.3 KiB
Ruby

# frozen_string_literal: true
class RemoveStatusService < BaseService
include Redisable
include Payloadable
# Delete a status
# @param [Status] status
# @param [Hash] options
# @option [Boolean] :redraft
# @option [Boolean] :immediate
# @option [Boolean] :original_removed
def call(status, **options)
@payload = Oj.dump(event: :delete, payload: status.id.to_s)
@status = status
@account = status.account
@options = options
RedisLock.acquire(lock_options) do |lock|
if lock.acquired?
remove_from_self if @account.local?
remove_from_followers
remove_from_lists
# There is no reason to send out Undo activities when the
# cause is that the original object has been removed, since
# original object being removed implicitly removes reblogs
# of it. The Delete activity of the original is forwarded
# separately.
if @account.local? && !@options[:original_removed]
remove_from_remote_followers
remove_from_remote_reach
end
# Since reblogs don't mention anyone, don't get reblogged,
# favourited and don't contain their own media attachments
# or hashtags, this can be skipped
unless @status.reblog?
remove_from_mentions
remove_reblogs
remove_from_hashtags
remove_from_public
remove_from_media if @status.media_attachments.any?
remove_from_spam_check
remove_media
end
@status.destroy! if @options[:immediate] || !@status.reported?
else
raise Mastodon::RaceConditionError
end
end
end
private
def remove_from_self
FeedManager.instance.unpush_from_home(@account, @status)
end
def remove_from_followers
@account.followers_for_local_distribution.reorder(nil).find_each do |follower|
FeedManager.instance.unpush_from_home(follower, @status)
end
end
def remove_from_lists
@account.lists_for_local_distribution.select(:id, :account_id).reorder(nil).find_each do |list|
FeedManager.instance.unpush_from_list(list, @status)
end
end
def remove_from_mentions
# For limited visibility statuses, the mentions that determine
# who receives them in their home feed are a subset of followers
# and therefore the delete is already handled by sending it to all
# followers. Here we send a delete to actively mentioned accounts
# that may not follow the account
@status.active_mentions.find_each do |mention|
redis.publish("timeline:#{mention.account_id}", @payload)
end
end
def remove_from_remote_reach
return if @status.reblog?
# People who got mentioned in the status, or who
# reblogged it from someone else might not follow
# the author and wouldn't normally receive the
# delete notification - so here, we explicitly
# send it to them
status_reach_finder = StatusReachFinder.new(@status)
ActivityPub::DeliveryWorker.push_bulk(status_reach_finder.inboxes) do |inbox_url|
[signed_activity_json, @account.id, inbox_url]
end
end
def remove_from_remote_followers
ActivityPub::DeliveryWorker.push_bulk(@account.followers.inboxes) do |inbox_url|
[signed_activity_json, @account.id, inbox_url]
end
relay! if relayable?
end
def relayable?
@status.public_visibility?
end
def relay!
ActivityPub::DeliveryWorker.push_bulk(Relay.enabled.pluck(:inbox_url)) do |inbox_url|
[signed_activity_json, @account.id, inbox_url]
end
end
def signed_activity_json
@signed_activity_json ||= Oj.dump(serialize_payload(@status, @status.reblog? ? ActivityPub::UndoAnnounceSerializer : ActivityPub::DeleteSerializer, signer: @account))
end
def remove_reblogs
# We delete reblogs of the status before the original status,
# because once original status is gone, reblogs will disappear
# without us being able to do all the fancy stuff
@status.reblogs.includes(:account).find_each do |reblog|
RemoveStatusService.new.call(reblog, original_removed: true)
end
end
def remove_from_hashtags
@account.featured_tags.where(tag_id: @status.tags.map(&:id)).each do |featured_tag|
featured_tag.decrement(@status.id)
end
return unless @status.public_visibility?
@status.tags.map(&:name).each do |hashtag|
redis.publish("timeline:hashtag:#{hashtag.mb_chars.downcase}", @payload)
redis.publish("timeline:hashtag:#{hashtag.mb_chars.downcase}:local", @payload) if @status.local?
end
end
def remove_from_public
return unless @status.public_visibility?
redis.publish('timeline:public', @payload)
redis.publish(@status.local? ? 'timeline:public:local' : 'timeline:public:remote', @payload)
end
def remove_from_media
return unless @status.public_visibility?
redis.publish('timeline:public:media', @payload)
redis.publish(@status.local? ? 'timeline:public:local:media' : 'timeline:public:remote:media', @payload)
end
def remove_media
return if @options[:redraft] || (!@options[:immediate] && @status.reported?)
@status.media_attachments.destroy_all
end
def remove_from_spam_check
redis.zremrangebyscore("spam_check:#{@status.account_id}", @status.id, @status.id)
end
def lock_options
{ redis: Redis.current, key: "distribute:#{@status.id}" }
end
end