migration data and tools for old WP comments

bin/build_comment_wxr.rb

@@ -0,0 +1,95 @@
+#!/usr/bin/env ruby
+
+require 'rubygems'
+require 'nokogiri'
+require 'uri'
+
+comments_filename = File.expand_path(File.join(File.dirname(__FILE__), '..', 'comments.sql.xml'))
+posts_filename    = File.expand_path(File.join(File.dirname(__FILE__), '..', 'posts.sql.xml'))
+
+#
+# Build Post map
+#
+doc = Nokogiri::XML(File.open(posts_filename))
+
+posts = {}
+doc.xpath('//wp2_posts').each do |post_node|
+  id  = post_node.at_xpath('ID').content
+  url = post_node.at_xpath('guid').content
+  posts[id] = {
+    :title          => post_node.at_xpath('post_title').content,
+    :link           => url,
+    :identifier     => ("/articles#{URI.parse(url).path}" rescue nil),
+    :date           => post_node.at_xpath('post_date_gmt').content,
+    :comment_status => post_node.at_xpath('comment_status').content,
+    :content        => post_node.at_xpath('post_content').content,
+    :comments       => []
+  }
+end
+
+#
+# Proceess comments
+#
+doc = Nokogiri::XML(File.open(comments_filename))
+
+doc.xpath('//wp2_comments').each do |comment_node|
+  approved = comment_node.at_xpath('comment_approved').content
+  next unless approved == '1'
+
+  post_id = comment_node.at_xpath('comment_post_ID').content
+  posts[post_id][:comments] << {
+    :id           => comment_node.at_xpath('comment_ID').content,
+    :approved     => approved,
+    :author       => comment_node.at_xpath('comment_author').content,
+    :author_email => comment_node.at_xpath('comment_author_email').content,
+    :author_url   => comment_node.at_xpath('comment_author_url').content,
+    :author_ip    => comment_node.at_xpath('comment_author_IP').content,
+    :date         => comment_node.at_xpath('comment_date_gmt').content,
+    :content      => comment_node.at_xpath('comment_content').content,
+    :parent       => comment_node.at_xpath('comment_parent').content
+  }
+end
+
+#
+# Build WXR format
+#
+
+builder = Nokogiri::XML::Builder.new(:encoding => 'UTF-8') do |xml|
+  xml.rss(
+    'version'       => '2.0',
+    'xmlns:content' => 'http://purl.org/rss/1.0/modules/content/',
+    'xmlns:dsq'     => 'http://www.disqus.com/',
+    'xmlns:dc'      => 'http://purl.org/dc/elements/1.1/',
+    'xmlns:wp'      => 'http://wordpress.org/export/1.0/'
+  ) {
+    xml.channel {
+      posts.each_pair do |id, post|
+        next if post[:comments].empty?
+
+        xml.item {
+          xml.title post[:title]
+          xml.link post[:link]
+          xml['content'].encoded post[:content]
+          xml['dsq'].thread_identifier post[:identifier]
+          xml['wp'].post_date_gmt post[:date]
+          xml['wp'].comment_status post[:comment_status]
+
+          post[:comments].each do |comment|
+            xml['wp'].comment {
+              xml['wp'].comment_id comment[:id]
+              xml['wp'].comment_author comment[:author]
+              xml['wp'].comment_author_email comment[:author_email]
+              xml['wp'].comment_author_url comment[:author_url]
+              xml['wp'].comment_author_IP comment[:author_ip]
+              xml['wp'].comment_date_gmt comment[:date]
+              xml['wp'].comment_content comment[:content]
+              xml['wp'].comment_approved comment[:approved]
+              xml['wp'].comment_parent comment[:parent]
+            }
+          end
+        }
+      end
+    }
+  }
+end
+puts builder.to_xml