Mail Merge method

mail_merge.rb

  # Performs a mail merge based on the options hash that is passed in
  # Example: text_block.merged_content({:site => @site, :user => @user})
  # will search text_block.content and find all instances of ::user.[method]::
  # and ::site.[method]:: and send the [method] to the associated object
  # Chaining works as well (ex. ::site.organization.name:: yields 'TST Media')
  def merged_content(content, options = {})
    merged = content
    
    options.keys.each do |key|
      obj = options[key]
      merged = merged.gsub(/::#{key.to_s}\.[\w|\.]*::/) do |s| 
        res = s[/\..*\w/][/\w.*/].split('.').collect{|m| obj = obj.send(m)}.last
        obj = options[key]
        res
      end
    end
    
    merged
  end