discourse/lib/import_export/base_exporter.rb

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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_latest, :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