require 'yaml'

class BlogRoll
  class Blog
    attr_reader :name, :title, :url

    def initialize(name, title, url)
      if name.nil? || url.nil?
        raise "Invalid blogroll entry, #{name}/#{title}/#{url}"
      end

      @name, @title, @url = name, title||name, url
    end
  end

  def self.load(filename)
    new YAML.load(File.read(filename))
  end

  def initialize(entries)
    @entries = {}
    entries.each { |cat, blogs|
      @entries[cat] =  blogs.map { |k, v|
        Blog.new k, v['title'] || k,  v['url']
      }
    }
  end

  def entries(category=nil)
    (category ? @entries[category] : @entries.values.flatten).sort_by { |e|
      e.name.downcase
    }
  end
end


class Nukumi2::Page
  attr_inject :blogroll
  attr_reader :blogroll
end

# By default, no blogroll.
Nukumi2::DefaultRegistry.define.blogroll { nil }