103 lines
3.7 KiB
Ruby
103 lines
3.7 KiB
Ruby
# frozen_string_literal: true
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class BatchedRemoveStatusService < BaseService
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include Redisable
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# Delete multiple statuses and reblogs of them as efficiently as possible
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# @param [Enumerable<Status>] statuses An array of statuses
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# @param [Hash] options
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# @option [Boolean] :skip_side_effects Do not modify feeds and send updates to streaming API
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def call(statuses, **options)
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ActiveRecord::Associations::Preloader.new.preload(statuses, options[:skip_side_effects] ? :reblogs : [:account, reblogs: :account])
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statuses_and_reblogs = statuses.flat_map { |status| [status] + status.reblogs }
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# The conversations for direct visibility statuses also need
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# to be manually updated. This part is not efficient but we
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# rely on direct visibility statuses being relatively rare.
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statuses_with_account_conversations = statuses.select(&:direct_visibility?)
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ActiveRecord::Associations::Preloader.new.preload(statuses_with_account_conversations, [mentions: :account])
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statuses_with_account_conversations.each do |status|
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status.send(:unlink_from_conversations)
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end
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# We do not batch all deletes into one to avoid having a long-running
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# transaction lock the database, but we use the delete method instead
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# of destroy to avoid all callbacks. We rely on foreign keys to
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# cascade the delete faster without loading the associations.
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statuses_and_reblogs.each(&:delete)
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# Since we skipped all callbacks, we also need to manually
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# deindex the statuses
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Chewy.strategy.current.update(StatusesIndex, statuses_and_reblogs)
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return if options[:skip_side_effects]
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ActiveRecord::Associations::Preloader.new.preload(statuses_and_reblogs, :tags)
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@tags = statuses_and_reblogs.each_with_object({}) { |s, h| h[s.id] = s.tags.map { |tag| tag.name.mb_chars.downcase } }
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@json_payloads = statuses_and_reblogs.each_with_object({}) { |s, h| h[s.id] = Oj.dump(event: :delete, payload: s.id.to_s) }
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# Batch by source account
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statuses_and_reblogs.group_by(&:account_id).each_value do |account_statuses|
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account = account_statuses.first.account
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next unless account
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unpush_from_home_timelines(account, account_statuses)
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unpush_from_list_timelines(account, account_statuses)
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end
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# Cannot be batched
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redis.pipelined do
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statuses_and_reblogs.each do |status|
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unpush_from_public_timelines(status)
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end
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end
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end
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private
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def unpush_from_home_timelines(account, statuses)
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account.followers_for_local_distribution.includes(:user).find_each do |follower|
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statuses.each do |status|
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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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return unless account.local?
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statuses.each do |status|
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FeedManager.instance.unpush_from_home(account, status)
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end
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end
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def unpush_from_list_timelines(account, statuses)
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account.lists_for_local_distribution.select(:id, :account_id).includes(account: :user).find_each do |list|
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statuses.each do |status|
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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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end
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def unpush_from_public_timelines(status)
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return unless status.public_visibility?
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payload = @json_payloads[status.id]
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redis.publish('timeline:public', payload)
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redis.publish(status.local? ? 'timeline:public:local' : 'timeline:public:remote', payload)
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if status.media_attachments.any?
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redis.publish('timeline:public:media', payload)
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redis.publish(status.local? ? 'timeline:public:local:media' : 'timeline:public:remote:media', payload)
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end
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@tags[status.id].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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end
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