Modifications for image urls

Find and replace the urls by the file urls in DB, in the theme files and
layout.html file. Save a copy of those files under "file_orig".

app/models/design/theme.rb

@@ -1,9 +1,40 @@
 class Theme < Stylesheet
   embedded_in :design
   field :name
+  mount_uploader :file_orig, AssetUploader
   
   before_save :set_name
   
+  def parse_urls
+    orig_content = content = self.file.read
+    self.remove_file!
+    self.remove_file_orig!
+    names = []
+    images = self.design.images
+    content.scan(/(?<=url\()(.*?)(?=\))/){
+      css_name = $1
+      name = File.basename(css_name).gsub(/[\\\"]/, '')
+      file_name = images.detect{ |i| i.file_filename.eql?(name) }.file_url rescue nil
+      names << [css_name, file_name]
+    }
+    names.each do |name|
+      content.gsub!(name[0], name[1])
+    end
+    Dir.mktmpdir('f_path') { |dir|
+      orig_file_name = self.file_filename
+      
+      temp_file = File.new(dir + '/' + orig_file_name, 'w+')
+      temp_file.write orig_content.force_encoding("UTF-8")
+      self.file_orig = temp_file
+      
+      temp_file = File.new(dir + '/' + orig_file_name, 'w+')
+      temp_file.write content.force_encoding("UTF-8")
+      self.file = temp_file
+      
+      self.save
+    }  
+  end
+  
   protected
   
   def set_name