module ActionDispatch module Routing class Mapper class Constraints def self.new(app, constraints = []) if constraints.any? super(app, constraints) else app end end def initialize(app, constraints = []) @app, @constraints = app, constraints end def call(env) req = Rack::Request.new(env) @constraints.each { |constraint| if constraint.respond_to?(:matches?) && !constraint.matches?(req) return [ 404, {'X-Cascade' => 'pass'}, [] ] elsif constraint.respond_to?(:call) && !constraint.call(req) return [ 404, {'X-Cascade' => 'pass'}, [] ] end } @app.call(env) end end class Mapping def initialize(set, scope, args) @set, @scope = set, scope @path, @options = extract_path_and_options(args) end def to_route [ app, conditions, requirements, defaults, @options[:as] ] end private def extract_path_and_options(args) options = args.extract_options! case when using_to_shorthand?(args, options) path, to = options.find { |name, value| name.is_a?(String) } options.merge!(:to => to).delete(path) if path when using_match_shorthand?(args, options) path = args.first options = { :to => path.gsub("/", "#"), :as => path.gsub("/", "_") } else path = args.first end [ normalize_path(path), options ] end # match "account" => "account#index" def using_to_shorthand?(args, options) args.empty? && options.present? end # match "account/overview" def using_match_shorthand?(args, options) args.present? && options.except(:via).empty? && !args.first.include?(':') end def normalize_path(path) path = nil if path == "" path = "#{@scope[:path]}#{path}" if @scope[:path] path = Rack::Mount::Utils.normalize_path(path) if path raise ArgumentError, "path is required" unless path path end def app Constraints.new( to.respond_to?(:call) ? to : Routing::RouteSet::Dispatcher.new(:defaults => defaults), blocks ) end def conditions { :path_info => @path }.merge(constraints).merge(request_method_condition) end def requirements @requirements ||= returning(@options[:constraints] || {}) do |requirements| requirements.reverse_merge!(@scope[:constraints]) if @scope[:constraints] @options.each { |k, v| requirements[k] = v if v.is_a?(Regexp) } requirements[:controller] ||= @set.controller_constraints end end def defaults @defaults ||= if to.respond_to?(:call) { } else defaults = case to when String controller, action = to.split('#') { :controller => controller, :action => action } when Symbol { :action => to.to_s }.merge(default_controller ? { :controller => default_controller } : {}) else default_controller ? { :controller => default_controller } : {} end if defaults[:controller].blank? && segment_keys.exclude?("controller") raise ArgumentError, "missing :controller" end if defaults[:action].blank? && segment_keys.exclude?("action") raise ArgumentError, "missing :action" end defaults end end def blocks if @options[:constraints].present? && !@options[:constraints].is_a?(Hash) block = @options[:constraints] else block = nil end ((@scope[:blocks] || []) + [ block ]).compact end def constraints @constraints ||= requirements.reject { |k, v| segment_keys.include?(k.to_s) || k == :controller } end def request_method_condition if via = @options[:via] via = Array(via).map { |m| m.to_s.upcase } { :request_method => Regexp.union(*via) } else { } end end def segment_keys @segment_keys ||= Rack::Mount::RegexpWithNamedGroups.new( Rack::Mount::Strexp.compile(@path, requirements, SEPARATORS) ).names end def to @options[:to] end def default_controller @scope[:controller].to_s if @scope[:controller] end end module Base def initialize(set) @set = set end def root(options = {}) match '/', options.reverse_merge(:as => :root) end def match(*args) @set.add_route(*Mapping.new(@set, @scope, args).to_route) self end end module HttpHelpers def get(*args, &block) map_method(:get, *args, &block) end def post(*args, &block) map_method(:post, *args, &block) end def put(*args, &block) map_method(:put, *args, &block) end def delete(*args, &block) map_method(:delete, *args, &block) end def redirect(*args, &block) options = args.last.is_a?(Hash) ? args.pop : {} path = args.shift || block path_proc = path.is_a?(Proc) ? path : proc { |params| path % params } status = options[:status] || 301 body = 'Moved Permanently' lambda do |env| req = Request.new(env) uri = URI.parse(path_proc.call(req.params.symbolize_keys)) uri.scheme ||= req.scheme uri.host ||= req.host uri.port ||= req.port unless req.port == 80 headers = { 'Location' => uri.to_s, 'Content-Type' => 'text/html', 'Content-Length' => body.length.to_s } [ status, headers, [body] ] end end private def map_method(method, *args, &block) options = args.extract_options! options[:via] = method args.push(options) match(*args, &block) self end end module Scoping def initialize(*args) @scope = {} super end def scope(*args) options = args.extract_options! case args.first when String options[:path] = args.first when Symbol options[:controller] = args.first end if path = options.delete(:path) path_set = true path, @scope[:path] = @scope[:path], Rack::Mount::Utils.normalize_path(@scope[:path].to_s + path.to_s) else path_set = false end if name_prefix = options.delete(:name_prefix) name_prefix_set = true name_prefix, @scope[:name_prefix] = @scope[:name_prefix], (@scope[:name_prefix] ? "#{@scope[:name_prefix]}_#{name_prefix}" : name_prefix) else name_prefix_set = false end if controller = options.delete(:controller) controller_set = true controller, @scope[:controller] = @scope[:controller], controller else controller_set = false end constraints = options.delete(:constraints) || {} unless constraints.is_a?(Hash) block, constraints = constraints, {} end constraints, @scope[:constraints] = @scope[:constraints], (@scope[:constraints] || {}).merge(constraints) blocks, @scope[:blocks] = @scope[:blocks], (@scope[:blocks] || []) + [block] options, @scope[:options] = @scope[:options], (@scope[:options] || {}).merge(options) yield self ensure @scope[:path] = path if path_set @scope[:name_prefix] = name_prefix if name_prefix_set @scope[:controller] = controller if controller_set @scope[:options] = options @scope[:blocks] = blocks @scope[:constraints] = constraints end def controller(controller) scope(controller.to_sym) { yield } end def namespace(path) scope("/#{path}", :name_prefix => path.to_s) { yield } end def constraints(constraints = {}) scope(:constraints => constraints) { yield } end def match(*args) options = args.extract_options! options = (@scope[:options] || {}).merge(options) if @scope[:name_prefix] && !options[:as].blank? options[:as] = "#{@scope[:name_prefix]}_#{options[:as]}" elsif @scope[:name_prefix] && options[:as] == "" options[:as] = @scope[:name_prefix].to_s end args.push(options) super(*args) end end module Resources class Resource #:nodoc: attr_reader :plural, :singular def initialize(entities, options = {}) entities = entities.to_s @plural = entities.pluralize @singular = entities.singularize end def name plural end def controller plural end def member_name singular end def collection_name plural end def id_segment ":#{singular}_id" end end class SingletonResource < Resource #:nodoc: def initialize(entity, options = {}) super end def name singular end end def resource(*resources, &block) options = resources.extract_options! if resources.length > 1 raise ArgumentError if block_given? resources.each { |r| resource(r, options) } return self end resource = SingletonResource.new(resources.pop) if @scope[:scope_level] == :resources nested do resource(resource.name, options, &block) end return self end scope(:path => "/#{resource.name}", :controller => resource.controller) do with_scope_level(:resource, resource) do yield if block_given? get "(.:format)", :to => :show, :as => resource.member_name post "(.:format)", :to => :create put "(.:format)", :to => :update delete "(.:format)", :to => :destroy get "/new(.:format)", :to => :new, :as => "new_#{resource.singular}" get "/edit(.:format)", :to => :edit, :as => "edit_#{resource.singular}" end end self end def resources(*resources, &block) options = resources.extract_options! if resources.length > 1 raise ArgumentError if block_given? resources.each { |r| resources(r, options) } return self end resource = Resource.new(resources.pop) if @scope[:scope_level] == :resources nested do resources(resource.name, options, &block) end return self end scope(:path => "/#{resource.name}", :controller => resource.controller) do with_scope_level(:resources, resource) do yield if block_given? with_scope_level(:collection) do get "(.:format)", :to => :index, :as => resource.collection_name post "(.:format)", :to => :create with_exclusive_name_prefix :new do get "/new(.:format)", :to => :new, :as => resource.singular end end with_scope_level(:member) do scope("/:id") do get "(.:format)", :to => :show, :as => resource.member_name put "(.:format)", :to => :update delete "(.:format)", :to => :destroy with_exclusive_name_prefix :edit do get "/edit(.:format)", :to => :edit, :as => resource.singular end end end end end self end def collection unless @scope[:scope_level] == :resources raise ArgumentError, "can't use collection outside resources scope" end with_scope_level(:collection) do scope(:name_prefix => parent_resource.collection_name, :as => "") do yield end end end def member unless @scope[:scope_level] == :resources raise ArgumentError, "can't use member outside resources scope" end with_scope_level(:member) do scope("/:id", :name_prefix => parent_resource.member_name, :as => "") do yield end end end def nested unless @scope[:scope_level] == :resources raise ArgumentError, "can't use nested outside resources scope" end with_scope_level(:nested) do scope("/#{parent_resource.id_segment}", :name_prefix => parent_resource.member_name) do yield end end end def match(*args) options = args.extract_options! if args.length > 1 args.each { |path| match(path, options) } return self end if args.first.is_a?(Symbol) with_exclusive_name_prefix(args.first) do return match("/#{args.first}(.:format)", options.merge(:to => args.first.to_sym)) end end args.push(options) case options.delete(:on) when :collection return collection { match(*args) } when :member return member { match(*args) } end if @scope[:scope_level] == :resources raise ArgumentError, "can't define route directly in resources scope" end super end protected def parent_resource @scope[:scope_level_resource] end private def with_exclusive_name_prefix(prefix) begin old_name_prefix = @scope[:name_prefix] if !old_name_prefix.blank? @scope[:name_prefix] = "#{prefix}_#{@scope[:name_prefix]}" else @scope[:name_prefix] = prefix.to_s end yield ensure @scope[:name_prefix] = old_name_prefix end end def with_scope_level(kind, resource = parent_resource) old, @scope[:scope_level] = @scope[:scope_level], kind old_resource, @scope[:scope_level_resource] = @scope[:scope_level_resource], resource yield ensure @scope[:scope_level] = old @scope[:scope_level_resource] = old_resource end end include Base include HttpHelpers include Scoping include Resources end end end