module ImportExport class BaseExporter attr_reader :export_data, :categories CATEGORY_ATTRS = [:id, :name, :color, :created_at, :user_id, :slug, :description, :text_color, :auto_close_hours, :parent_category_id, :auto_close_based_on_last_post, :topic_template, :suppress_from_homepage, :all_topics_wiki, :permissions_params] GROUP_ATTRS = [ :id, :name, :created_at, :mentionable_level, :messageable_level, :visibility_level, :automatic_membership_email_domains, :automatic_membership_retroactive, :primary_group, :title, :grant_trust_level, :incoming_email] USER_ATTRS = [:id, :email, :username, :name, :created_at, :trust_level, :active, :last_emailed_at] TOPIC_ATTRS = [:id, :title, :created_at, :views, :category_id, :closed, :archived, :archetype] POST_ATTRS = [:id, :user_id, :post_number, :raw, :created_at, :reply_to_post_number, :hidden, :hidden_reason_id, :wiki] def categories @categories ||= Category.all.to_a end def export_categories data = [] categories.each do |cat| data << CATEGORY_ATTRS.inject({}) { |h, a| h[a] = cat.send(a); h } end data end def export_categories! @export_data[:categories] = export_categories self end def export_category_groups groups = [] group_names = [] auto_group_names = Group::AUTO_GROUPS.keys.map(&:to_s) @export_data[:categories].each do |c| c[:permissions_params].each do |group_name, _| group_names << group_name unless auto_group_names.include?(group_name.to_s) end end group_names.uniq! return [] if group_names.empty? Group.where(name: group_names).find_each do |group| attrs = GROUP_ATTRS.inject({}) { |h, a| h[a] = group.send(a); h } attrs[:user_ids] = group.users.pluck(:id) groups << attrs end groups end def export_category_groups! @export_data[:groups] = export_category_groups self end def export_group_users user_ids = [] @export_data[:groups].each do |g| user_ids += g[:user_ids] end user_ids.uniq! return User.none if user_ids.empty? users = User.where(id: user_ids) export_users(users) end def export_group_users! @export_data[:users] = export_group_users self end def export_topics data = [] @topics.each do |topic| puts topic.title topic_data = TOPIC_ATTRS.inject({}) { |h, a| h[a] = topic.send(a); h; } topic_data[:posts] = [] topic.ordered_posts.find_each do |post| h = POST_ATTRS.inject({}) { |h, a| h[a] = post.send(a); h; } h[:raw] = h[:raw].gsub('src="/uploads', "src=\"#{Discourse.base_url_no_prefix}/uploads") topic_data[:posts] << h end data << topic_data end data end def export_topics! @export_data[:topics] = export_topics self end def export_topic_users return if @export_data[:topics].blank? topic_ids = @export_data[:topics].pluck(:id) users = User.joins(:posts).where('posts.topic_id IN (?)', topic_ids).distinct export_users(users) end def export_topic_users! @export_data[:users] = export_topic_users self end def export_users(users) data = [] users.find_each do |u| next if u.id == Discourse::SYSTEM_USER_ID x = USER_ATTRS.inject({}) { |h, a| h[a] = u.send(a); h; } x.merge(bio_raw: u.user_profile.bio_raw, website: u.user_profile.website, location: u.user_profile.location) data << x end data end def default_filename_prefix raise "Overwrite me!" end def save_to_file(filename = nil) output_basename = filename || File.join("#{default_filename_prefix}-#{Time.now.strftime("%Y-%m-%d-%H%M%S")}.json") File.open(output_basename, "w:UTF-8") do |f| f.write(@export_data.to_json) end puts "Export saved to #{output_basename}" output_basename end end end