gistfile1.rb

# Mephisto to Wordpress converter
# 
# Create your database credentials in mephisto.yml and wordpress.yml
# then run ruby converter.rb
#

require 'rubygems'
require 'activerecord'
require 'activesupport'
require 'yaml'

@blog_url = "YOUR_URL" # Without the 'http://'

module Mephisto
  CREDENTIALS = YAML::load(File.open('mephisto.yml'))
  ActiveRecord::Base.establish_connection(CREDENTIALS)
  # Horrible shortcut alert!
  %w(Content Tag Tagging).each do |tbl|
    eval <<-STR
      class #{tbl} < ActiveRecord::Base
        self.abstract_class = true
        establish_connection(CREDENTIALS)
      end
    STR
  end
  
  %w(Article Comment).each do |tbl|
    eval <<-STR
      class #{tbl} < Content
        self.abstract_class = true
        establish_connection(CREDENTIALS)
      end
    STR
  end
end

module Wordpress
  CREDENTIALS= YAML::load(File.open('wordpress.yml'))
  ActiveRecord::Base.establish_connection(CREDENTIALS)
  %w(WpTerm WpTermRelationships WpPost WpComment).each do |tbl|
    eval <<-STR
      class #{tbl} < ActiveRecord::Base
        self.abstract_class = true
        establish_connection(CREDENTIALS)
      end
    STR
  end
  
  # We have to override ActiveRecords plurilization of table names
  # because wordpress doesn't follow with this table.
  class WpTermTaxonomy < ActiveRecord::Base
    self.abstract_class = true
    establish_connection(CREDENTIALS)
    set_table_name 'wp_term_taxonomy'
  end
end

# This next section is shamlessly stole from Jason Gill at
# http://blog.gilluminate.com/2008/05/08/how-i-converted-mephisto-to-wordpress/
# and adapted to work with the latest versions of Mephisto (Drax) and Wordpress (2.7)

## Get Mephisto's info
start_time = Time.now
puts 'querying mephisto articles'
@articles = Mephisto::Content.find(:all, :conditions=>"article_id IS NULL")
puts 'querying mephisto comments'
@comments = Mephisto::Content.find(:all, :conditions=>"article_id IS NOT NULL")
puts 'querying mephisto taggings'
@taggings = Mephisto::Tagging.find(:all)
puts 'querying mephisto tags'
@tags = Mephisto::Tag.find(:all)
puts 'processing terms'
Wordpress::WpTerm.delete_all

@old_tags = Hash.new

for tag in @tags
  # I encountered an error with slugs where Mephisto allows distinct tags that
  # are the same but with mixed cases.
  slug = tag.name.downcase.gsub(' ','_')
  if old_tag = Wordpress::WpTerm.find_by_slug(slug)
    @old_tags[old_tag.id] = slug
  else
    @wp_term = Wordpress::WpTerm.new
    @wp_term.term_id = tag.id
    @wp_term.name = tag.name
    @wp_term.slug = slug
    @wp_term.term_group = 0
    @wp_term.save
  end      
end

puts 'processing term relationships'
Wordpress::WpTermRelationships.delete_all
for tagging in @taggings
  @wp_tr = Wordpress::WpTermRelationships.new
  if @old_tags.keys.include?(tagging.tag_id)
    @wp_tr.term_taxonomy_id = @old_tags[tagging.tag_id]
  else
    @wp_tr.term_taxonomy_id = tagging.tag_id
  end
  @wp_tr.object_id = tagging.taggable_id
  @wp_tr.save
end

puts 'processing term taxonomy'
Wordpress::WpTermTaxonomy.delete_all
for tag in @tags
  c = Mephisto::Tagging.count(:all, :conditions=>"tag_id = #{tag.id}")
  @wp_tt = Wordpress::WpTermTaxonomy.new
  @wp_tt.term_taxonomy_id = tag.id
  @wp_tt.term_id = tag.id
  @wp_tt.taxonomy = "post_tag"
  @wp_tt.parent = 0
  @wp_tt.count = c
  @wp_tt.save
end
puts 'processing posts'
Wordpress::WpPost.delete_all
for article in @articles
  c = Mephisto::Content.count(:all, :conditions=>"article_id = #{article.id}")
  @wp_post = Wordpress::WpPost.new
  @wp_post.ID = article.id
  @wp_post.post_author = article.user_id
  @wp_post.post_date = (article.published_at.nil? ? Time.now + 7.days : article.published_at-7.hours)
  @wp_post.post_date_gmt = (article.published_at.nil? ? Time.now + 7.days : article.published_at) 
  @wp_post.post_content = article.body
  @wp_post.post_title = article.title
  @wp_post.post_category = 39
  @wp_post.post_status = article.published_at.nil? ? "open" : "publish"
  @wp_post.ping_status = "closed"
  @wp_post.post_name = article.permalink
  @wp_post.post_modified = article.updated_at#-7.hours
  @wp_post.post_modified_gmt = article.updated_at
  @wp_post.post_parent = 0
  @wp_post.guid = article.published_at.strftime("http://#{@blog_url}/%Y/%m/%d/")+article.permalink rescue ''
  @wp_post.menu_order = 0
  @wp_post.post_type = "post"
  @wp_post.comment_count = c
  @wp_post.save
end
puts 'processing comments'
Wordpress::WpComment.delete_all
for comment in @comments
  @wp_com = Wordpress::WpComment.new
  @wp_com.comment_ID = comment.id
  @wp_com.comment_post_ID = comment.article_id
  @wp_com.comment_author = comment.author
  @wp_com.comment_author_email = comment.author_email
  if comment.author_url == nil
    comment.author_url = ""
  end
  @wp_com.comment_author_url = comment.author_url
  @wp_com.comment_author_IP = comment.author_ip
  @wp_com.comment_date = comment.published_at-7.hours
  @wp_com.comment_date_gmt = comment.published_at
  @wp_com.comment_content = comment.body
  @wp_com.comment_karma = 0
  @wp_com.comment_approved = '1'
  @wp_com.comment_parent = 0
  @wp_com.user_id = 0
  @wp_com.save
end
puts 'finished!'
end_time = Time.now
@lapsed = end_time-start_time