discourse/app/models/user_export.rb

# frozen_string_literal: true

class UserExport < ActiveRecord::Base
  belongs_to :user
  belongs_to :upload, dependent: :destroy
  belongs_to :topic, dependent: :destroy

  has_many :upload_references, as: :target, dependent: :destroy

  after_save do
    if saved_change_to_upload_id?
      UploadReference.ensure_exist!(upload_ids: [self.upload_id], target: self)
    end
  end

  DESTROY_CREATED_BEFORE = 2.days.ago

  def self.remove_old_exports
    UserExport
      .where("created_at < ?", DESTROY_CREATED_BEFORE)
      .find_each do |user_export|
        UserExport.transaction do
          begin
            Post.where(topic_id: user_export.topic_id).find_each { |p| p.destroy! }
            user_export.destroy!
          rescue => e
            Rails.logger.warn(
              "Failed to remove user_export record with id #{user_export.id}: #{e.message}\n#{e.backtrace.join("\n")}",
            )
          end
        end
      end
  end

  def self.base_directory
    File.join(
      Rails.root,
      "public",
      "uploads",
      "csv_exports",
      RailsMultisite::ConnectionManagement.current_db,
    )
  end
end

# == Schema Information
#
# Table name: user_exports
#
#  id         :integer          not null, primary key
#  file_name  :string           not null
#  user_id    :integer          not null
#  created_at :datetime         not null
#  updated_at :datetime         not null
#  upload_id  :integer
#  topic_id   :integer
#