module Nukumi2
  module View
    class Abstract
      attr_reader :blog, :path

      def initialize(registry, path)
        @registry = registry
        @blog = @registry.blog
        @path = path
      end

      def entries
        []
      end

      def to_page(flavor)
        @registry.page(self, flavor)
      end
    end

    class Empty < Abstract
    end

    class Full < Abstract
      def initialize(blog, path)
        super
        @entries = blog.topictree[path]
      end

      def entries
        @entries.sort_by { |e| e.time }.reverse
      end
    end

    class Single < Full
    end

    class Last < Full
      def entries
        super.first(@registry.show_last)
      end
    end
    
    class Subtopic < Empty
      attr_reader :subtopics
      def initialize(blog, path)
        super
        @subtopics = blog.topictree.subtopics(path).map { |sub|
          subtopic = File.join(path, sub)
          [subtopic, blog.topictree.name(subtopic) || sub]
        }.sort
      end
    end
  end
end