Module: Rack::Ajax::DecisionTree

Included in:
Rack::Ajax
Defined in:
lib/rack-ajax/decision_tree.rb

Instance Method Summary collapse

Instance Method Details

#default_decision_tree ⇒ Object

Decision tree for Rack rewrites and redirects.

To use your own decision tree set it on the Ajax instance with:

Ajax.decision_tree = Proc.new do
  # your code
end

Note: User agents never send the hashed part of the URL, meaning some of the conditions below will never be true, but I’ve included them for completeness.



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# File 'lib/rack-ajax/decision_tree.rb', line 16

def default_decision_tree
  @@default_decision_tree ||= Proc.new do
    ::Ajax.logger.debug("[ajax] Ajax-Info #{@env['Ajax-Info'].inspect}")

    if !::Ajax.exclude_path?(@env['PATH_INFO'] || @env['REQUEST_URI'])
      if ajax_request?
        if hashed_url? # the browser never sends the hashed part
          rewrite_to_traditional_url_from_fragment
        end
      else
        if url_is_root?
          if hashed_url? # the browser never sends the hashed part
            rewrite_to_traditional_url_from_fragment
          elsif get_request? && !user_is_robot?
            # When we render the framework we would like to show the
            # page the user wants on the first request.  If the
            # session has a value for <tt>redirected_to</tt> then
            # that page will be rendered.
            if redirected_to = (@env['rack.session'][:redirected_to] || @env['rack.session']['redirected_to'])
              redirected_to = ::Ajax.is_hashed_url?(redirected_to) ? ::Ajax.traditional_url_from_fragment(redirected_to) : redirected_to
              ::Ajax.logger.debug("[ajax] showing #{redirected_to} instead of root_url")
              rewrite(redirected_to)
            else
              rewrite_to_render_ajax_framework
            end
          end
        else
          if !user_is_robot?
            if hashed_url? # will never be true
              redirect_to_hashed_url_from_fragment
            else
              if get_request?
                redirect_to_hashed_url_equivalent
              end
            end
          end
        end
      end
    end
  end
end