Vendor unreleased rack-mount 0.6.6.pre dependency

1 files changed, 409 insertions, 0 deletions

diff --git a/actionpack/lib/action_dispatch/vendor/rack-mount-0.6.6.pre/rack/mount/route_set.rb b/actionpack/lib/action_dispatch/vendor/rack-mount-0.6.6.pre/rack/mount/route_set.rb
new file mode 100644
index 0000000000..0e5a65a640
--- /dev/null
+++ b/actionpack/lib/action_dispatch/vendor/rack-mount-0.6.6.pre/rack/mount/route_set.rb
@@ -0,0 +1,409 @@
+require 'rack/mount/multimap'
+require 'rack/mount/route'
+require 'rack/mount/utils'
+
+module Rack::Mount
+  class RoutingError < StandardError; end
+
+  class RouteSet
+    # Initialize a new RouteSet without optimizations
+    def self.new_without_optimizations(options = {}, &block)
+      new(options.merge(:_optimize => false), &block)
+    end
+
+    # Basic RouteSet initializer.
+    #
+    # If a block is given, the set is yielded and finalized.
+    #
+    # See other aspects for other valid options:
+    # - <tt>Generation::RouteSet.new</tt>
+    # - <tt>Recognition::RouteSet.new</tt>
+    def initialize(options = {}, &block)
+      @parameters_key = options.delete(:parameters_key) || 'rack.routing_args'
+      @parameters_key.freeze
+
+      @named_routes = {}
+
+      @recognition_key_analyzer = Analysis::Splitting.new
+      @generation_key_analyzer  = Analysis::Frequency.new
+
+      @request_class = options.delete(:request_class) || Rack::Request
+      @valid_conditions = @request_class.public_instance_methods.map! { |m| m.to_sym }
+
+      extend CodeGeneration unless options[:_optimize] == false
+      @optimized_recognize_defined = false
+
+      @routes = []
+      expire!
+
+      if block_given?
+        yield self
+        rehash
+      end
+    end
+
+    # Builder method to add a route to the set
+    #
+    # <tt>app</tt>:: A valid Rack app to call if the conditions are met.
+    # <tt>conditions</tt>:: A hash of conditions to match against.
+    #                       Conditions may be expressed as strings or
+    #                       regexps to match against.
+    # <tt>defaults</tt>:: A hash of values that always gets merged in
+    # <tt>name</tt>:: Symbol identifier for the route used with named
+    #                 route generations
+    def add_route(app, conditions = {}, defaults = {}, name = nil)
+      unless conditions.is_a?(Hash)
+        raise ArgumentError, 'conditions must be a Hash'
+      end
+
+      unless conditions.all? { |method, pattern|
+          @valid_conditions.include?(method)
+        }
+        raise ArgumentError, 'conditions may only include ' +
+          @valid_conditions.inspect
+      end
+
+      route = Route.new(app, conditions, defaults, name)
+      @routes << route
+
+      @recognition_key_analyzer << route.conditions
+
+      @named_routes[route.name] = route if route.name
+      @generation_key_analyzer << route.generation_keys
+
+      expire!
+      route
+    end
+
+    def recognize(obj)
+      raise 'route set not finalized' unless @recognition_graph
+
+      cache = {}
+      keys = @recognition_keys.map { |key|
+        if key.respond_to?(:call)
+          key.call(cache, obj)
+        else
+          obj.send(key)
+        end
+      }
+
+      @recognition_graph[*keys].each do |route|
+        matches = {}
+        params  = route.defaults.dup
+
+        if route.conditions.all? { |method, condition|
+            value = obj.send(method)
+            if condition.is_a?(Regexp) && (m = value.match(condition))
+              matches[method] = m
+              captures = m.captures
+              route.named_captures[method].each do |k, i|
+                if v = captures[i]
+                  params[k] = v
+                end
+              end
+              true
+            elsif value == condition
+              true
+            else
+              false
+            end
+          }
+          if block_given?
+            yield route, matches, params
+          else
+            return route, matches, params
+          end
+        end
+      end
+
+      nil
+    end
+
+    X_CASCADE = 'X-Cascade'.freeze
+    PASS      = 'pass'.freeze
+    PATH_INFO = 'PATH_INFO'.freeze
+
+    # Rack compatible recognition and dispatching method. Routes are
+    # tried until one returns a non-catch status code. If no routes
+    # match, the catch status code is returned.
+    #
+    # This method can only be invoked after the RouteSet has been
+    # finalized.
+    def call(env)
+      raise 'route set not finalized' unless @recognition_graph
+
+      env[PATH_INFO] = Utils.normalize_path(env[PATH_INFO])
+
+      request = nil
+      req = @request_class.new(env)
+      recognize(req) do |route, matches, params|
+        # TODO: We only want to unescape params from uri related methods
+        params.each { |k, v| params[k] = Utils.unescape_uri(v) if v.is_a?(String) }
+
+        if route.prefix?
+          env[Prefix::KEY] = matches[:path_info].to_s
+        end
+
+        env[@parameters_key] = params
+        result = route.app.call(env)
+        return result unless result[1][X_CASCADE] == PASS
+      end
+
+      request || [404, {'Content-Type' => 'text/html', 'X-Cascade' => 'pass'}, ['Not Found']]
+    end
+
+    # Generates a url from Rack env and identifiers or significant keys.
+    #
+    # To generate a url by named route, pass the name in as a +Symbol+.
+    #   url(env, :dashboard) # => "/dashboard"
+    #
+    # Additional parameters can be passed in as a hash
+    #   url(env, :people, :id => "1") # => "/people/1"
+    #
+    # If no name route is given, it will fall back to a slower
+    # generation search.
+    #   url(env, :controller => "people", :action => "show", :id => "1")
+    #     # => "/people/1"
+    def url(env, *args)
+      named_route, params = nil, {}
+
+      case args.length
+      when 2
+        named_route, params = args[0], args[1].dup
+      when 1
+        if args[0].is_a?(Hash)
+          params = args[0].dup
+        else
+          named_route = args[0]
+        end
+      else
+        raise ArgumentError
+      end
+
+      only_path = params.delete(:only_path)
+      recall = env[@parameters_key] || {}
+
+      unless result = generate(:all, named_route, params, recall,
+          :parameterize => lambda { |name, param| Utils.escape_uri(param) })
+        return
+      end
+
+      parts, params = result
+      return unless parts
+
+      params.each do |k, v|
+        if v
+          params[k] = v
+        else
+          params.delete(k)
+        end
+      end
+
+      req = stubbed_request_class.new(env)
+      req._stubbed_values = parts.merge(:query_string => Utils.build_nested_query(params))
+      only_path ? req.fullpath : req.url
+    end
+
+    def generate(method, *args) #:nodoc:
+      raise 'route set not finalized' unless @generation_graph
+
+      method = nil if method == :all
+      named_route, params, recall, options = extract_params!(*args)
+      merged = recall.merge(params)
+      route = nil
+
+      if named_route
+        if route = @named_routes[named_route.to_sym]
+          recall = route.defaults.merge(recall)
+          url = route.generate(method, params, recall, options)
+          [url, params]
+        else
+          raise RoutingError, "#{named_route} failed to generate from #{params.inspect}"
+        end
+      else
+        keys = @generation_keys.map { |key|
+          if k = merged[key]
+            k.to_s
+          else
+            nil
+          end
+        }
+        @generation_graph[*keys].each do |r|
+          next unless r.significant_params?
+          if url = r.generate(method, params, recall, options)
+            return [url, params]
+          end
+        end
+
+        raise RoutingError, "No route matches #{params.inspect}"
+      end
+    end
+
+    # Number of routes in the set
+    def length
+      @routes.length
+    end
+
+    def rehash #:nodoc:
+      @recognition_keys  = build_recognition_keys
+      @recognition_graph = build_recognition_graph
+      @generation_keys   = build_generation_keys
+      @generation_graph  = build_generation_graph
+    end
+
+    # Finalizes the set and builds optimized data structures. You *must*
+    # freeze the set before you can use <tt>call</tt> and <tt>url</tt>.
+    # So remember to call freeze after you are done adding routes.
+    def freeze
+      unless frozen?
+        rehash
+
+        @recognition_key_analyzer = nil
+        @generation_key_analyzer  = nil
+        @valid_conditions         = nil
+
+        @routes.each { |route| route.freeze }
+        @routes.freeze
+      end
+
+      super
+    end
+
+    def marshal_dump #:nodoc:
+      hash = {}
+
+      instance_variables_to_serialize.each do |ivar|
+        hash[ivar] = instance_variable_get(ivar)
+      end
+
+      if graph = hash[:@recognition_graph]
+        hash[:@recognition_graph] = graph.dup
+      end
+
+      hash
+    end
+
+    def marshal_load(hash) #:nodoc:
+      hash.each do |ivar, value|
+        instance_variable_set(ivar, value)
+      end
+    end
+
+    protected
+      def recognition_stats
+        { :keys => @recognition_keys,
+          :keys_size => @recognition_keys.size,
+          :graph_size => @recognition_graph.size,
+          :graph_height => @recognition_graph.height,
+          :graph_average_height => @recognition_graph.average_height }
+      end
+
+    private
+      def expire! #:nodoc:
+        @recognition_keys = @recognition_graph = nil
+        @recognition_key_analyzer.expire!
+
+        @generation_keys = @generation_graph = nil
+        @generation_key_analyzer.expire!
+      end
+
+      def instance_variables_to_serialize
+        instance_variables.map { |ivar| ivar.to_sym } - [:@stubbed_request_class, :@optimized_recognize_defined]
+      end
+
+      # An internal helper method for constructing a nested set from
+      # the linear route set.
+      #
+      # build_nested_route_set([:request_method, :path_info]) { |route, method|
+      #   route.send(method)
+      # }
+      def build_nested_route_set(keys, &block)
+        graph = Multimap.new
+        @routes.each_with_index do |route, index|
+          catch(:skip) do
+            k = keys.map { |key| block.call(key, index) }
+            Utils.pop_trailing_nils!(k)
+            k.map! { |key| key || /.+/ }
+            graph[*k] = route
+          end
+        end
+        graph
+      end
+
+      def build_recognition_graph
+        build_nested_route_set(@recognition_keys) { |k, i|
+          @recognition_key_analyzer.possible_keys[i][k]
+        }
+      end
+
+      def build_recognition_keys
+        @recognition_key_analyzer.report
+      end
+
+      def build_generation_graph
+        build_nested_route_set(@generation_keys) { |k, i|
+          throw :skip unless @routes[i].significant_params?
+
+          if k = @generation_key_analyzer.possible_keys[i][k]
+            k.to_s
+          else
+            nil
+          end
+        }
+      end
+
+      def build_generation_keys
+        @generation_key_analyzer.report
+      end
+
+      def extract_params!(*args)
+        case args.length
+        when 4
+          named_route, params, recall, options = args
+        when 3
+          if args[0].is_a?(Hash)
+            params, recall, options = args
+          else
+            named_route, params, recall = args
+          end
+        when 2
+          if args[0].is_a?(Hash)
+            params, recall = args
+          else
+            named_route, params = args
+          end
+        when 1
+          if args[0].is_a?(Hash)
+            params = args[0]
+          else
+            named_route = args[0]
+          end
+        else
+          raise ArgumentError
+        end
+
+        named_route ||= nil
+        params  ||= {}
+        recall  ||= {}
+        options ||= {}
+
+        [named_route, params.dup, recall.dup, options.dup]
+      end
+
+      def stubbed_request_class
+        @stubbed_request_class ||= begin
+          klass = Class.new(@request_class)
+          klass.public_instance_methods.each do |method|
+            next if method =~ /^__|object_id/
+            klass.class_eval <<-RUBY
+              def #{method}(*args, &block)
+                @_stubbed_values[:#{method}] || super
+              end
+            RUBY
+          end
+          klass.class_eval { attr_accessor :_stubbed_values }
+          klass
+        end
+      end
+  end
+end