discourse/lib/tasks/disqus.thor

189 lines
4.6 KiB
Ruby

require 'nokogiri'
class DisqusSAX < Nokogiri::XML::SAX::Document
attr_accessor :posts, :threads
def initialize(options=nil)
@inside = {}
@posts = {}
@threads = {}
@options = options || {}
end
def start_element(name, attrs = [])
case name
when 'post'
@post = {}
@post[:id] = Hash[attrs]['dsq:id'] if @post
when 'thread'
id = Hash[attrs]['dsq:id']
if @post
thread = @threads[id]
thread[:posts] << @post
else
@thread = {id: id, posts: []}
end
when 'parent'
if @post
id = Hash[attrs]['dsq:id']
@post[:parent_id] = id
end
end
@inside[name] = true
end
def end_element(name)
case name
when 'post'
@posts[@post[:id]] = @post
@post = nil
when 'thread'
if @post.nil?
@threads[@thread[:id]] = @thread
@thread = nil
end
end
@inside[name] = false
end
def characters(str)
record(@post, :author_email, str, 'author', 'email')
record(@post, :author_name, str, 'author', 'name')
record(@post, :author_anonymous, str, 'author', 'isAnonymous')
record(@post, :created_at, str, 'createdAt')
record(@thread, :link, str, 'link')
record(@thread, :title, str, 'title')
record(@thread, :created_at, str, 'createdAt')
end
def cdata_block(str)
record(@post, :cooked, str, 'message')
end
def record(target, sym, str, *params)
return if target.nil?
if inside?(*params)
target[sym] ||= ""
target[sym] << str
end
end
def inside?(*params)
return !params.find{|p| !@inside[p]}
end
def normalize
@threads.each do |id, t|
if t[:posts].size == 0
# Remove any threads that have no posts
@threads.delete(id)
else
# Normalize titles
t[:title].gsub!(@options[:strip], '') if @options[:strip].present?
t[:title].strip!
end
end
# Merge any threads that have the same title
existing_title = {}
@threads.each do |id, t|
existing = existing_title[t[:title]]
if existing.nil?
existing_title[t[:title]] = t
else
existing[:posts] << t[:posts]
existing[:posts].flatten!
@threads.delete(t[:id])
end
end
end
end
class Disqus < Thor
desc "import", "Imports posts from a Disqus XML export"
method_option :file, aliases: '-f', required: true, desc: "The disqus XML file to import"
method_option :dry_run, required: false, desc: "Just output what will be imported rather than doing it"
method_option :post_as, aliases: '-p', required: true, desc: "The Discourse username to post as"
method_option :strip, aliases: '-s', required: false, desc: "Text to strip from titles"
def import
require './config/environment'
email_blacklist = SiteSetting.email_domains_blacklist
user = User.where(username_lower: options[:post_as].downcase).first
if user.nil?
puts "No user found named: '#{options[:post_as]}'"
exit 1
end
unless File.exist?(options[:file])
puts "File '#{options[:file]}' not found"
exit 1
end
parser = DisqusSAX.new(options)
doc = Nokogiri::XML::SAX::Parser.new(parser)
doc.parse_file(options[:file])
parser.normalize
RateLimiter.disable
SiteSetting.email_domains_blacklist = ""
parser.threads.each do |id, t|
puts "Creating #{t[:title]}... (#{t[:posts].size} posts)"
if options[:dry_run].blank?
post = TopicEmbed.import_remote(user, t[:link], title: t[:title])
if post.present?
t[:posts].each do |p|
post_user = user
if p[:author_email]
email = Email.downcase(p[:author_email])
post_user = User.where(email: email).first
if post_user.blank?
post_user = User.create!(email: email, username: UserNameSuggester.suggest(email))
end
end
attrs = {
topic_id: post.topic_id,
raw: p[:cooked],
cooked: p[:cooked],
created_at: Date.parse(p[:created_at])
}
if p[:parent_id]
parent = parser.posts[p[:parent_id]]
if parent && parent[:discourse_number]
attrs[:reply_to_post_number] = parent[:discourse_number]
end
end
post = PostCreator.new(post_user, attrs).create
p[:discourse_number] = post.post_number
end
TopicFeaturedUsers.new(post.topic).choose
end
end
end
ensure
RateLimiter.enable
SiteSetting.email_domains_blacklist = email_blacklist
end
end