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# frozen_string_literal: true
class RemoveStatusService < BaseService
include StreamEntryRenderer
def call(status)
@payload = Oj.dump(event: :delete, payload: status.id)
@status = status
@account = status.account
@tags = status.tags.pluck(:name).to_a
@mentions = status.mentions.includes(:account).to_a
@reblogs = status.reblogs.to_a
@stream_entry = status.stream_entry
remove_from_self if status.account.local?
remove_from_followers
remove_reblogs
remove_from_hashtags
remove_from_public
@status.destroy!
return unless @account.local?
@stream_entry = @stream_entry.reload
remove_from_remote_followers
remove_from_remote_affected
end
private
def remove_from_self
unpush(:home, @account, @status)
end
def remove_from_followers
@account.followers.local.find_each do |follower|
unpush(:home, follower, @status)
end
end
def remove_from_remote_affected
# 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
target_accounts = (@mentions.map(&:account).reject(&:local?) + @reblogs.map(&:account).reject(&:local?)).uniq(&:id)
# Ostatus
NotificationWorker.push_bulk(target_accounts.select(&:ostatus?).uniq(&:domain)) do |target_account|
[salmon_xml, @account.id, target_account.id]
end
# ActivityPub
ActivityPub::DeliveryWorker.push_bulk(target_accounts.select(&:activitypub?).uniq(&:inbox_url)) do |inbox_url|
[signed_activity_json, @account.id, inbox_url]
end
end
def remove_from_remote_followers
# OStatus
Pubsubhubbub::DistributionWorker.perform_async(@stream_entry.id)
# ActivityPub
ActivityPub::DeliveryWorker.push_bulk(@account.followers.inboxes) do |inbox_url|
[signed_activity_json, @account.id, inbox_url]
end
end
def salmon_xml
@salmon_xml ||= stream_entry_to_xml(@stream_entry)
end
def signed_activity_json
@signed_activity_json ||= Oj.dump(ActivityPub::LinkedDataSignature.new(activity_json).sign!(@account))
end
def activity_json
@activity_json ||= ActiveModelSerializers::SerializableResource.new(
@status,
serializer: ActivityPub::DeleteSerializer,
adapter: ActivityPub::Adapter
).as_json
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
@reblogs.each do |reblog|
RemoveStatusService.new.call(reblog)
end
end
def unpush(type, receiver, status)
if status.reblog? && !redis.zscore(FeedManager.instance.key(type, receiver.id), status.reblog_of_id).nil?
redis.zadd(FeedManager.instance.key(type, receiver.id), status.reblog_of_id, status.reblog_of_id)
else
redis.zremrangebyscore(FeedManager.instance.key(type, receiver.id), status.id, status.id)
end
Redis.current.publish("timeline:#{receiver.id}", @payload)
end
def remove_from_hashtags
@tags.each do |hashtag|
Redis.current.publish("timeline:hashtag:#{hashtag}", @payload)
Redis.current.publish("timeline:hashtag:#{hashtag}:local", @payload) if @status.local?
end
end
def remove_from_public
Redis.current.publish('timeline:public', @payload)
Redis.current.publish('timeline:public:local', @payload) if @status.local?
end
def redis
Redis.current
end
end