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# frozen_string_literal: true |
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class BatchedRemoveStatusService < BaseService |
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include StreamEntryRenderer |
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# Delete given statuses and reblogs of them |
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# Dispatch PuSH updates of the deleted statuses, but only local ones |
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# Dispatch Salmon deletes, unique per domain, of the deleted statuses, but only local ones |
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# Remove statuses from home feeds |
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# Push delete events to streaming API for home feeds and public feeds |
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# @param [Status] statuses A preferably batched array of statuses |
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def call(statuses) |
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statuses = Status.where(id: statuses.map(&:id)).includes(:account, :stream_entry).flat_map { |status| [status] + status.reblogs.includes(:account, :stream_entry).to_a } |
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@mentions = statuses.map { |s| [s.id, s.mentions.includes(:account).to_a] }.to_h |
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@tags = statuses.map { |s| [s.id, s.tags.pluck(:name)] }.to_h |
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@stream_entry_batches = [] |
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@salmon_batches = [] |
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@json_payloads = statuses.map { |s| [s.id, Oj.dump(event: :delete, payload: s.id)] }.to_h |
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# Ensure that rendered XML reflects destroyed state |
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Status.where(id: statuses.map(&:id)).in_batches.destroy_all |
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# Batch by source account |
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statuses.group_by(&:account_id).each do |_, account_statuses| |
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account = account_statuses.first.account |
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unpush_from_home_timelines(account_statuses) |
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batch_stream_entries(account_statuses) if account.local? |
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end |
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# Cannot be batched |
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statuses.each do |status| |
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unpush_from_public_timelines(status) |
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batch_salmon_slaps(status) if status.local? |
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end |
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Pubsubhubbub::DistributionWorker.push_bulk(@stream_entry_batches) { |batch| batch } |
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NotificationWorker.push_bulk(@salmon_batches) { |batch| batch } |
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end |
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private |
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def batch_stream_entries(statuses) |
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stream_entry_ids = statuses.map { |s| s.stream_entry.id } |
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stream_entry_ids.each_slice(100) do |batch_of_stream_entry_ids| |
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@stream_entry_batches << [batch_of_stream_entry_ids] |
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end |
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end |
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def unpush_from_home_timelines(statuses) |
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account = statuses.first.account |
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recipients = account.followers.local.pluck(:id) |
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recipients << account.id if account.local? |
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recipients.each do |follower_id| |
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unpush(follower_id, statuses) |
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end |
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end |
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def unpush_from_public_timelines(status) |
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payload = @json_payloads[status.id] |
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redis.pipelined do |
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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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@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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def batch_salmon_slaps(status) |
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return if @mentions[status.id].empty? |
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payload = stream_entry_to_xml(status.stream_entry.reload) |
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recipients = @mentions[status.id].map(&:account).reject(&:local?).uniq(&:domain).map(&:id) |
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recipients.each do |recipient_id| |
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@salmon_batches << [payload, status.account_id, recipient_id] |
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end |
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end |
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def unpush(follower_id, statuses) |
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key = FeedManager.instance.key(:home, follower_id) |
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originals = statuses.reject(&:reblog?) |
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reblogs = statuses.reject { |s| !s.reblog? } |
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# Quickly remove all originals |
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redis.pipelined do |
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originals.each do |status| |
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redis.zremrangebyscore(key, status.id, status.id) |
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redis.publish("timeline:#{follower_id}", @json_payloads[status.id]) |
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end |
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end |
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# For reblogs, re-add original status to feed, unless the reblog |
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# was not in the feed in the first place |
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reblogs.each do |status| |
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redis.zadd(key, status.reblog_of_id, status.reblog_of_id) unless redis.zscore(key, status.reblog_of_id).nil? |
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redis.publish("timeline:#{follower_id}", @json_payloads[status.id]) |
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end |
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end |
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def redis |
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Redis.current |
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end |
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end |