Resend Delete activity about suspended accounts

resend_suspended_delete_activity.rb

# Run "bundle exec sidekiq -q tmp -c 32" to run in side of main sidekiq jobs to prevent huge latency on push queue
dry_run = 1  # Change this to nil to run actually
inboxes = Account.inboxes
worker = ActivityPub::DeliveryWorker.new

worker.sidekiq_options_hash['retry'] = 0
worker.sidekiq_options_hash['queue'] = 'tmp'

processed = 0

Account.local.suspended.find_each do |account|
  payload = ActiveModelSerializers::SerializableResource.new(
    account,
    serializer: ActivityPub::DeleteActorSerializer,
    adapter: ActivityPub::Adapter
  ).as_json

  json = Oj.dump(ActivityPub::LinkedDataSignature.new(payload).sign!(account))

  unless dry_run
    worker.push_bulk(inboxes) do |inbox_url|
      [json, account.id, inbox_url]
    end
  end

  processed += 1
end

p("Queued #{inboxes.size * processed} items into sidekiq for #{processed} accounts")

As misskey was ignoring remote users' Delete activity, It is not bad for resending Delete activity for deleted accounts.