class TagCloud

# File lib/tagcloud.rb, line 10
def initialize(opt)
  opts = {uri: '', tags: [], public_path: '/tags'}.merge(opt)
  uri, tags, public_path = [:uri, :tags, :public_path].map{|x| opts[x]}

  main(uri, tags, 'tags.xml')
  index(public_path, tags, 'index.xml')

  # add it to rows --> [tag]_rows.xml
  rows(tags, uri)

  # add it to [tag] -> [tag].xml
  tag(public_path, tags)
end

# File lib/tagcloud.rb, line 35
def index(public_path, tags=[], filename='index.xml')

  if File.exists? filename then
    dynarex = Dynarex.new(filename)
  else
    dynarex = Dynarex.new('tags/entry(tag,url)')  
  end

  tags.each do |tag|
    dynarex.create tag: tag, url: "%s/%s.html" % [public_path, tag]
  end

  dynarex.save filename, pretty: true
end

# File lib/tagcloud.rb, line 24
def main(uri, tags=[], filename='tags.xml')

  polyrex = Polyrex.new('entries/entry[tag]/urls[url]')

  tags.each do |tag|
    polyrex.create.entry(tag: tag) {|create|  create.urls(url: uri) }
  end

  polyrex.save filename, pretty: true
end

# File lib/tagcloud.rb, line 51
def rows(tags=[], url)

  tags.each do |tag| 

    filename = "%s_rows.xml" % tag

    if File.exists? filename then

      dynarex = Dynarex.new()

    else

      dynarex = Dynarex.new('entries/entry(url)')

    end


    dynarex.create url: url

    dynarex.save filename, pretty: true
  end

end

# File lib/tagcloud.rb, line 77
def tag(public_path, tags=[])

  tags.length.times do |tag|

    tags.rotate!
    main_tag = tags.first
    filename = "%s.xml" % main_tag

    if File.exists? filename then

      dynarex = Dynarex.new(filename)

    else

      dynarex = Dynarex.new('entries[tag]/entry(tag, url)')  
    end

    dynarex.summary['tag'] = main_tag
    tags[1..-1].each do |tag|
      dynarex.create tag: tag, url: "%s/%s.html" % [public_path, tag]
    end

    dynarex.save filename, pretty: true
  end

end