```ruby
require 'sinatra'
require 'sprockets'
require_relative 'config'

module Days
  class App < Sinatra::Base
    set(:sprockets, Sprockets::Environment.new.tap { |env|
      # env.append_path "#{root}/javascripts"
      # env.append_path "#{root}/stylesheets"
    })

    set(:rack, Rack::Builder.app {
      app = ::Days::App
      map '/' do
        run app
      end

      map '/assets' do
        run app.sprockets
      end
    })

    set(:config, nil)

    class << self
      alias environment_orig= environment=
      def environment=(x)
        environment_orig = x
        Config.namespace x.to_s
        x
      end
    end
  end
end
```

Enable session and condition for admin_only
user
```ruby
require 'sinatra'
require 'sprockets'
require_relative 'config'

module Days
  class App < Sinatra::Base
    set(:sprockets, Sprockets::Environment.new.tap { |env|
      # env.append_path "#{root}/javascripts"
      # env.append_path "#{root}/stylesheets"
    })

    set(:rack, Rack::Builder.app {
      app = ::Days::App
      map '/' do
        run app
      end

      map '/assets' do
        run app.sprockets
      end
    })

    set(:config, nil)
    set :method_override, true

    configure :production, :development do
      enable :sessions
    end

    helpers do
      def logged_in?
        !!session[:user_id]
      end
    end

    set :admin_only do |_|
      condition do
        unless logged_in?
          halt 401
        end
      end
    end

    class << self
      alias environment_orig= environment=
      def environment=(x)
        self.environment_orig = x
        Config.namespace x.to_s
        x
      end

      alias config_orig= config=
      def config=(x)
        self.config_orig = x
        self.set :session_secret, config['session_secret'] || 'jjiw-jewn-n2i9-nc1e_binding.pry-is-good'
        x
      end
    end
  end
end

Dir["#{File.dirname(__FILE__)}/app/**/*.rb"].each do |f|
  require f
end

```
assistant