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151 lines
5.0 KiB
151 lines
5.0 KiB
# 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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@activity_json_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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@activity_json = {}
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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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if account.local?
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batch_stream_entries(account_statuses)
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batch_activity_json(account, account_statuses)
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end
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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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ActivityPub::DeliveryWorker.push_bulk(@activity_json_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 batch_activity_json(account, statuses)
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account.followers.inboxes.each do |inbox_url|
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statuses.each do |status|
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@activity_json_batches << [build_json(status), account.id, inbox_url]
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end
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end
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statuses.each do |status|
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other_recipients = (status.mentions + status.reblogs).map(&:account).reject(&:local?).select(&:activitypub?).uniq(&:id)
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other_recipients.each do |target_account|
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@activity_json_batches << [build_json(status), account.id, target_account.inbox_url]
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end
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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?).select(&:ostatus?).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.select(&: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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def build_json(status)
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return @activity_json[status.id] if @activity_json.key?(status.id)
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@activity_json[status.id] = sign_json(status, ActiveModelSerializers::SerializableResource.new(
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status,
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serializer: 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 sign_json(status, json)
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Oj.dump(ActivityPub::LinkedDataSignature.new(json).sign!(status.account))
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end
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end
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