web.rb

class Web < Sinatra::Base
  helpers Sinatra::ContentFor

  set :markdown, layout_engine: :haml

  helpers do
    def markdown(template, options = {}, locals = {})
      options.merge!({
        hard_wrap: true,
        filter_html: true,
        autolink: true,
        no_intraemphasis: true,
        fenced_code_blocks: true,
        gh_codeblock: true,
        with_toc_data: true
      })

      @toc = render(:markdown, template, options.merge(renderer: Redcarpet::Render::HTML_TOC, layout: false), locals)

      render(:markdown, template, options.merge(renderer: Redcarpet::Render::HTML.new(with_toc_data: true)), locals)
    end

    def version
      File.basename(ENV['POSTGRESAPP_DOWNLOAD_URL'], ".zip").scan(/\d+/)[0...3].join(".")
    end
  end

  get '/' do
    # cache_control :public, :must_revalidate, max_age: 3600

    haml :index
  end

  get '/download' do
    redirect ENV['POSTGRESAPP_DOWNLOAD_URL']
  end

  get '/documentation' do
    cache_control :public, :must_revalidate, max_age: 3600

    @title = "Documentation"

    haml :documentation, locals: {text: markdown(:'README', layout: false, views: ::File.expand_path(::File.dirname(__FILE__), ".."))}
  end
end

class HTMLwithAlbino < Redcarpet::Render::HTML
  def block_code(code, language)
    Albino.colorize((code || "").strip, language || :text)
  end
end

module Haml::Filters::Markdown
  require 'redcarpet/compat'
  include Haml::Filters::Base
  lazy_require "redcarpet"

  def render(text)
    ::Markdown.new(text).to_html
  end
end