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177 lines
5.4 KiB
177 lines
5.4 KiB
# frozen_string_literal: true
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class RemoveStatusService < BaseService
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include StreamEntryRenderer
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include Redisable
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def call(status, **options)
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@payload = Oj.dump(event: :delete, payload: status.id.to_s)
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@status = status
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@account = status.account
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@tags = status.tags.pluck(:name).to_a
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@mentions = status.active_mentions.includes(:account).to_a
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@reblogs = status.reblogs.includes(:account).to_a
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@stream_entry = status.stream_entry
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@options = options
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RedisLock.acquire(lock_options) do |lock|
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if lock.acquired?
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remove_from_self if status.account.local?
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remove_from_followers
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remove_from_lists
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remove_from_affected
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remove_reblogs
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remove_from_hashtags
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remove_from_public
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remove_from_media if status.media_attachments.any?
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remove_from_direct if status.direct_visibility?
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@status.destroy!
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else
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raise Mastodon::RaceConditionError
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end
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end
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# There is no reason to send out Undo activities when the
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# cause is that the original object has been removed, since
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# original object being removed implicitly removes reblogs
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# of it. The Delete activity of the original is forwarded
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# separately.
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return if !@account.local? || @options[:original_removed]
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remove_from_remote_followers
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remove_from_remote_affected
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end
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private
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def remove_from_self
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FeedManager.instance.unpush_from_home(@account, @status)
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end
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def remove_from_followers
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@account.followers_for_local_distribution.reorder(nil).find_each do |follower|
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FeedManager.instance.unpush_from_home(follower, @status)
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end
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end
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def remove_from_lists
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@account.lists_for_local_distribution.select(:id, :account_id).reorder(nil).find_each do |list|
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FeedManager.instance.unpush_from_list(list, @status)
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end
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end
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def remove_from_affected
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@mentions.map(&:account).select(&:local?).each do |account|
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redis.publish("timeline:#{account.id}", @payload)
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end
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end
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def remove_from_remote_affected
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# People who got mentioned in the status, or who
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# reblogged it from someone else might not follow
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# the author and wouldn't normally receive the
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# delete notification - so here, we explicitly
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# send it to them
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target_accounts = (@mentions.map(&:account).reject(&:local?) + @reblogs.map(&:account).reject(&:local?))
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target_accounts << @status.reblog.account if @status.reblog? && !@status.reblog.account.local?
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target_accounts.uniq!(&:id)
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# Ostatus
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NotificationWorker.push_bulk(target_accounts.select(&:ostatus?).uniq(&:domain)) do |target_account|
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[salmon_xml, @account.id, target_account.id]
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end
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# ActivityPub
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ActivityPub::DeliveryWorker.push_bulk(target_accounts.select(&:activitypub?).uniq(&:preferred_inbox_url)) do |target_account|
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[signed_activity_json, @account.id, target_account.preferred_inbox_url]
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end
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end
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def remove_from_remote_followers
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# OStatus
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Pubsubhubbub::RawDistributionWorker.perform_async(salmon_xml, @account.id)
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# ActivityPub
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ActivityPub::DeliveryWorker.push_bulk(@account.followers.inboxes) do |inbox_url|
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[signed_activity_json, @account.id, inbox_url]
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end
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relay! if relayable?
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end
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def relayable?
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@status.public_visibility?
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end
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def relay!
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ActivityPub::DeliveryWorker.push_bulk(Relay.enabled.pluck(:inbox_url)) do |inbox_url|
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[signed_activity_json, @account.id, inbox_url]
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end
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end
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def salmon_xml
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@salmon_xml ||= stream_entry_to_xml(@stream_entry)
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end
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def signed_activity_json
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@signed_activity_json ||= Oj.dump(ActivityPub::LinkedDataSignature.new(activity_json).sign!(@account))
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end
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def activity_json
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@activity_json ||= ActiveModelSerializers::SerializableResource.new(
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@status,
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serializer: @status.reblog? ? ActivityPub::UndoAnnounceSerializer : ActivityPub::DeleteSerializer,
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adapter: ActivityPub::Adapter
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).as_json
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end
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def remove_reblogs
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# We delete reblogs of the status before the original status,
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# because once original status is gone, reblogs will disappear
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# without us being able to do all the fancy stuff
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@reblogs.each do |reblog|
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RemoveStatusService.new.call(reblog, original_removed: true)
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end
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end
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def remove_from_hashtags
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@account.featured_tags.where(tag_id: @status.tags.pluck(:id)).each do |featured_tag|
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featured_tag.decrement(@status.id)
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end
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return unless @status.public_visibility?
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@tags.each do |hashtag|
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redis.publish("timeline:hashtag:#{hashtag}", @payload)
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redis.publish("timeline:hashtag:#{hashtag}:local", @payload) if @status.local?
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end
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end
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def remove_from_public
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return unless @status.public_visibility?
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redis.publish('timeline:public', @payload)
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redis.publish('timeline:public:local', @payload) if @status.local?
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end
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def remove_from_media
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return unless @status.public_visibility?
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redis.publish('timeline:public:media', @payload)
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redis.publish('timeline:public:local:media', @payload) if @status.local?
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end
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def remove_from_direct
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@mentions.each do |mention|
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Redis.current.publish("timeline:direct:#{mention.account.id}", @payload) if mention.account.local?
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end
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Redis.current.publish("timeline:direct:#{@account.id}", @payload) if @account.local?
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end
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def lock_options
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{ redis: Redis.current, key: "distribute:#{@status.id}" }
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end
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end
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