Rails route helper for authentication constraints

routes.rb

# config/routes.rb
# Usage example


authenticated do
  root to: "dashboard#index", as :dashboard
end

root to: "public#index"

routing_helpers.rb

# config/initializers/routing_helpers.rb

class AuthenticatedConstraint
  def matches?(request)
    cookies = ActionDispatch::Cookies::CookieJar.build(request, request.cookies)
    if (session_id = cookies.signed[:session_id])
      return true if Session.find_by(id: session_id)
    end
    
    false
    
  rescue => _
    false
  end
end

module RoutingHelpers
  def authenticated(options = {}, &block)
    constraint = AuthenticatedConstraint.new
    constraints(constraint, &block)
  end
end

ActionDispatch::Routing::Mapper.include(RoutingHelpers)