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 = "#{@scope[:path]}/#{path}" raise ArgumentError, "path is required" if path.empty? Mapper.normalize_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 # Invokes Rack::Mount::Utils.normalize path and ensure that # (:locale) becomes (/:locale) instead of /(:locale). def self.normalize_path(path) path = Rack::Mount::Utils.normalize_path(path) path.sub!(%r{/\(+/?:}, '(/:') path 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 recover = {} options[:constraints] ||= {} unless options[:constraints].is_a?(Hash) block, options[:constraints] = options[:constraints], {} end scope_options.each do |option| if value = options.delete(option) recover[option] = @scope[option] @scope[option] = send("merge_#{option}_scope", @scope[option], value) end end recover[:block] = @scope[:blocks] @scope[:blocks] = merge_blocks_scope(@scope[:blocks], block) recover[:options] = @scope[:options] @scope[:options] = merge_options_scope(@scope[:options], options) yield self ensure scope_options.each do |option| @scope[option] = recover[option] if recover.has_key?(option) end @scope[:options] = recover[:options] @scope[:blocks] = recover[:block] end def controller(controller) scope(controller.to_sym) { yield } end def namespace(path) scope(path.to_s, :name_prefix => path.to_s, :namespace => 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 private def scope_options @scope_options ||= private_methods.grep(/^merge_(.+)_scope$/) { $1.to_sym } end def merge_path_scope(parent, child) Mapper.normalize_path("#{parent}/#{child}") end def merge_name_prefix_scope(parent, child) parent ? "#{parent}_#{child}" : child end def merge_namespace_scope(parent, child) parent ? "#{parent}/#{child}" : child end def merge_controller_scope(parent, child) @scope[:namespace] ? "#{@scope[:namespace]}/#{child}" : child end def merge_resources_path_names_scope(parent, child) merge_options_scope(parent, child) end def merge_constraints_scope(parent, child) merge_options_scope(parent, child) end def merge_blocks_scope(parent, child) (parent || []) + [child] end def merge_options_scope(parent, child) (parent || {}).merge(child) end end module Resources CRUD_ACTIONS = [:index, :show, :create, :update, :destroy] class Resource #:nodoc: def self.default_actions [:index, :create, :new, :show, :update, :destroy, :edit] end attr_reader :plural, :singular, :options def initialize(entities, options = {}) entities = entities.to_s @options = options @plural = entities.pluralize @singular = entities.singularize end def default_actions self.class.default_actions end def actions if only = options[:only] only.map(&:to_sym) elsif except = options[:except] default_actions - except.map(&:to_sym) else default_actions end end def action_type(action) case action when :index, :create :collection when :show, :update, :destroy :member end end def name options[:as] || plural end def controller options[:controller] || plural end def member_name singular end def collection_name plural end def name_for_action(action) case action_type(action) when :collection collection_name when :member member_name end end def id_segment ":#{singular}_id" end end class SingletonResource < Resource #:nodoc: def self.default_actions [:show, :create, :update, :destroy, :new, :edit] end def initialize(entity, options = {}) super end def action_type(action) case action when :show, :create, :update, :destroy :member end end def name options[:as] || singular end end def initialize(*args) super @scope[:resources_path_names] = @set.resources_path_names end def resource(*resources, &block) options = resources.extract_options! if verify_common_behavior_for(:resource, resources, options, &block) return self end resource = SingletonResource.new(resources.pop, options) scope(:path => resource.name.to_s, :controller => resource.controller) do with_scope_level(:resource, resource) do yield if block_given? get :show if resource.actions.include?(:show) post :create if resource.actions.include?(:create) put :update if resource.actions.include?(:update) delete :destroy if resource.actions.include?(:destroy) get :new, :as => resource.singular if resource.actions.include?(:new) get :edit, :as => resource.singular if resource.actions.include?(:edit) end end self end def resources(*resources, &block) options = resources.extract_options! if verify_common_behavior_for(:resources, resources, options, &block) return self end resource = Resource.new(resources.pop, options) scope(:path => resource.name.to_s, :controller => resource.controller) do with_scope_level(:resources, resource) do yield if block_given? with_scope_level(:collection) do get :index if resource.actions.include?(:index) post :create if resource.actions.include?(:create) get :new, :as => resource.singular if resource.actions.include?(:new) end with_scope_level(:member) do scope(':id') do get :show if resource.actions.include?(:show) put :update if resource.actions.include?(:update) delete :destroy if resource.actions.include?(:destroy) get :edit, :as => resource.singular if resource.actions.include?(:edit) 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 resources_path_names = options.delete(:path_names) if args.first.is_a?(Symbol) action = args.first if CRUD_ACTIONS.include?(action) begin old_path = @scope[:path] @scope[:path] = "#{@scope[:path]}(.:format)" return match(options.reverse_merge( :to => action, :as => parent_resource.name_for_action(action) )) ensure @scope[:path] = old_path end else with_exclusive_name_prefix(action) do return match("#{action_path(action, resources_path_names)}(.:format)", options.reverse_merge(:to => action)) end 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 action_path(name, path_names = nil) path_names ||= @scope[:resources_path_names] path_names[name.to_sym] || name.to_s end def verify_common_behavior_for(method, resources, options, &block) if resources.length > 1 resources.each { |r| send(method, r, options, &block) } return true end if path_names = options.delete(:path_names) scope(:resources_path_names => path_names) do send(method, resources.pop, options, &block) end return true end if @scope[:scope_level] == :resources nested do send(method, resources.pop, options, &block) end return true end false end 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