mastodon/app/workers/local_notification_worker.rb

# frozen_string_literal: true

class LocalNotificationWorker
  include Sidekiq::Worker

  def perform(receiver_account_id, activity_id = nil, activity_class_name = nil, type = nil)
    if activity_id.nil? && activity_class_name.nil?
      activity = Mention.find(receiver_account_id)
      receiver = activity.account
    else
      receiver = Account.find(receiver_account_id)
      activity = activity_class_name.constantize.find(activity_id)
    end

    # For most notification types, only one notification should exist, and the older one is
    # preferred. For updates, such as when a status is edited, the new notification
    # should replace the previous ones.
    if type == 'update'
      Notification.where(account: receiver, activity: activity, type: 'update').in_batches.delete_all
    elsif Notification.where(account: receiver, activity: activity, type: type).any?
      return
    end

    NotifyService.new.call(receiver, type || activity_class_name.underscore, activity)
  rescue ActiveRecord::RecordNotFound
    true
  end
end