module Hiccdown

# File lib/hiccdown.rb, line 4
def self.standalone_tags
  Set.new([:area, :base, :br, :col, :command, :embed, :hr, :img, :input, :keygen, :link, :menuitem, :meta, :param, :source, :track, :wbr])
end

# File lib/hiccdown.rb, line 8
def self.to_html structure
  if structure.is_a? Hash
    structure.reduce([]) do |acc, (key, val)|
      acc + [[key.to_s, '="', val.to_s, '"'].join]
    end.join(' ')
  elsif structure.is_a? Array
    if structure.first.is_a?(Array)
      return structure.map { |s| to_html s }.join
    end

    if structure[1].is_a? Hash
      tag, attrs, *children = structure.map { |s| to_html s }
      tag_and_attrs = structure[1].any? ? [tag, ' ', attrs].join : tag
    else
      tag, *children = structure.map { |s| to_html s }
    end

    if standalone_tags.include? tag.to_sym
      ['<', tag_and_attrs || tag, '/>'].join
    else
      ['<', tag_and_attrs || tag, '>', children.join, '</', tag, '>'].join
    end
  else
    structure.to_s
  end
end