mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
827 lines
24 KiB
Ruby
827 lines
24 KiB
Ruby
require 'active_support/core_ext/hash/except'
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require 'active_support/core_ext/object/blank'
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module ActionDispatch
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module Routing
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class Mapper
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class Constraints #:nodoc:
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def self.new(app, constraints, request = Rack::Request)
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if constraints.any?
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super(app, constraints, request)
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else
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app
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end
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end
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def initialize(app, constraints, request)
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@app, @constraints, @request = app, constraints, request
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end
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def call(env)
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req = @request.new(env)
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@constraints.each { |constraint|
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if constraint.respond_to?(:matches?) && !constraint.matches?(req)
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return [ 404, {'X-Cascade' => 'pass'}, [] ]
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elsif constraint.respond_to?(:call) && !constraint.call(req)
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return [ 404, {'X-Cascade' => 'pass'}, [] ]
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end
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}
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@app.call(env)
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end
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end
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class Mapping #:nodoc:
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IGNORE_OPTIONS = [:to, :as, :controller, :action, :via, :on, :constraints, :defaults, :only, :except, :anchor]
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def initialize(set, scope, args)
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@set, @scope = set, scope
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@path, @options = extract_path_and_options(args)
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end
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def to_route
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[ app, conditions, requirements, defaults, @options[:as], @options[:anchor] ]
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end
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private
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def extract_path_and_options(args)
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options = args.extract_options!
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if using_to_shorthand?(args, options)
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path, to = options.find { |name, value| name.is_a?(String) }
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options.merge!(:to => to).delete(path) if path
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else
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path = args.first
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end
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if @scope[:module] && options[:to]
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if options[:to].to_s.include?("#")
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options[:to] = "#{@scope[:module]}/#{options[:to]}"
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elsif @scope[:controller].nil?
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options[:to] = "#{@scope[:module]}##{options[:to]}"
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end
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end
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path = normalize_path(path)
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path_without_format = path.sub(/\(\.:format\)$/, '')
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if using_match_shorthand?(path_without_format, options)
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options[:to] ||= path_without_format[1..-1].sub(%r{/([^/]*)$}, '#\1')
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options[:as] ||= path_without_format[1..-1].gsub("/", "_")
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end
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[ path, options ]
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end
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# match "account" => "account#index"
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def using_to_shorthand?(args, options)
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args.empty? && options.present?
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end
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# match "account/overview"
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def using_match_shorthand?(path, options)
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path && options.except(:via, :anchor, :to, :as).empty? && path =~ %r{^/[\w\/]+$}
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end
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def normalize_path(path)
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raise ArgumentError, "path is required" if @scope[:path].blank? && path.blank?
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Mapper.normalize_path("#{@scope[:path]}/#{path}")
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end
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def app
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Constraints.new(
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to.respond_to?(:call) ? to : Routing::RouteSet::Dispatcher.new(:defaults => defaults),
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blocks,
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@set.request_class
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)
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end
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def conditions
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{ :path_info => @path }.merge(constraints).merge(request_method_condition)
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end
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def requirements
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@requirements ||= (@options[:constraints] || {}).tap do |requirements|
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requirements.reverse_merge!(@scope[:constraints]) if @scope[:constraints]
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@options.each { |k, v| requirements[k] = v if v.is_a?(Regexp) }
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end
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end
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def defaults
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@defaults ||= (@options[:defaults] || {}).tap do |defaults|
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defaults.merge!(default_controller_and_action)
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defaults.reverse_merge!(@scope[:defaults]) if @scope[:defaults]
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@options.each { |k, v| defaults[k] = v unless v.is_a?(Regexp) || IGNORE_OPTIONS.include?(k.to_sym) }
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end
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end
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def default_controller_and_action
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if to.respond_to?(:call)
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{ }
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else
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defaults = case to
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when String
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controller, action = to.split('#')
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{ :controller => controller, :action => action }
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when Symbol
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{ :action => to.to_s }
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else
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{}
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end
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defaults[:controller] ||= default_controller
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defaults.delete(:controller) if defaults[:controller].blank?
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defaults.delete(:action) if defaults[:action].blank?
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if defaults[:controller].blank? && segment_keys.exclude?("controller")
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raise ArgumentError, "missing :controller"
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end
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if defaults[:action].blank? && segment_keys.exclude?("action")
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raise ArgumentError, "missing :action"
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end
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defaults
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end
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end
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def blocks
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if @options[:constraints].present? && !@options[:constraints].is_a?(Hash)
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block = @options[:constraints]
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else
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block = nil
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end
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((@scope[:blocks] || []) + [ block ]).compact
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end
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def constraints
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@constraints ||= requirements.reject { |k, v| segment_keys.include?(k.to_s) || k == :controller }
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end
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def request_method_condition
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if via = @options[:via]
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via = Array(via).map { |m| m.to_s.upcase }
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{ :request_method => Regexp.union(*via) }
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else
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{ }
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end
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end
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def segment_keys
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@segment_keys ||= Rack::Mount::RegexpWithNamedGroups.new(
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Rack::Mount::Strexp.compile(@path, requirements, SEPARATORS)
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).names
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end
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def to
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@options[:to]
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end
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def default_controller
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if @options[:controller]
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@options[:controller].to_s
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elsif @scope[:controller]
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@scope[:controller].to_s
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end
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end
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end
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# Invokes Rack::Mount::Utils.normalize path and ensure that
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# (:locale) becomes (/:locale) instead of /(:locale). Except
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# for root cases, where the latter is the correct one.
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def self.normalize_path(path)
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path = Rack::Mount::Utils.normalize_path(path)
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path.sub!(%r{/(\(+)/?:}, '\1/:') unless path =~ %r{^/\(+:.*\)$}
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path
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end
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module Base
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def initialize(set) #:nodoc:
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@set = set
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end
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def root(options = {})
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match '/', options.reverse_merge(:as => :root)
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end
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def match(*args)
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mapping = Mapping.new(@set, @scope, args).to_route
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@set.add_route(*mapping)
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self
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end
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def mount(app, options = nil)
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if options
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path = options.delete(:at)
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else
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options = app
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app, path = options.find { |k, v| k.respond_to?(:call) }
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options.delete(app) if app
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end
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raise "A rack application must be specified" unless path
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match(path, options.merge(:to => app, :anchor => false))
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self
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end
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def default_url_options=(options)
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@set.default_url_options = options
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end
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alias_method :default_url_options, :default_url_options=
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end
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module HttpHelpers
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def get(*args, &block)
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map_method(:get, *args, &block)
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end
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def post(*args, &block)
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map_method(:post, *args, &block)
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end
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def put(*args, &block)
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map_method(:put, *args, &block)
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end
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def delete(*args, &block)
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map_method(:delete, *args, &block)
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end
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def redirect(*args, &block)
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options = args.last.is_a?(Hash) ? args.pop : {}
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path = args.shift || block
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path_proc = path.is_a?(Proc) ? path : proc { |params| path % params }
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status = options[:status] || 301
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body = 'Moved Permanently'
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lambda do |env|
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req = Request.new(env)
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params = [req.symbolized_path_parameters]
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params << req if path_proc.arity > 1
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uri = URI.parse(path_proc.call(*params))
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uri.scheme ||= req.scheme
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uri.host ||= req.host
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uri.port ||= req.port unless req.port == 80
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headers = {
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'Location' => uri.to_s,
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'Content-Type' => 'text/html',
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'Content-Length' => body.length.to_s
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}
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[ status, headers, [body] ]
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end
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end
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private
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def map_method(method, *args, &block)
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options = args.extract_options!
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options[:via] = method
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args.push(options)
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match(*args, &block)
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self
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end
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end
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module Scoping
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def initialize(*args) #:nodoc:
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@scope = {}
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super
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end
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def scope(*args)
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options = args.extract_options!
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options = options.dup
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case args.first
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when String
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options[:path] = args.first
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when Symbol
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options[:controller] = args.first
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end
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recover = {}
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options[:constraints] ||= {}
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unless options[:constraints].is_a?(Hash)
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block, options[:constraints] = options[:constraints], {}
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end
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scope_options.each do |option|
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if value = options.delete(option)
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recover[option] = @scope[option]
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@scope[option] = send("merge_#{option}_scope", @scope[option], value)
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end
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end
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recover[:block] = @scope[:blocks]
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@scope[:blocks] = merge_blocks_scope(@scope[:blocks], block)
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recover[:options] = @scope[:options]
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@scope[:options] = merge_options_scope(@scope[:options], options)
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yield
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self
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ensure
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scope_options.each do |option|
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@scope[option] = recover[option] if recover.has_key?(option)
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end
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@scope[:options] = recover[:options]
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@scope[:blocks] = recover[:block]
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end
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def controller(controller)
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scope(controller.to_sym) { yield }
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end
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def namespace(path)
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path = path.to_s
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scope(:path => path, :name_prefix => path, :module => path) { yield }
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end
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def constraints(constraints = {})
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scope(:constraints => constraints) { yield }
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end
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def defaults(defaults = {})
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scope(:defaults => defaults) { yield }
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end
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def match(*args)
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options = args.extract_options!
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options = (@scope[:options] || {}).merge(options)
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if @scope[:name_prefix] && !options[:as].blank?
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options[:as] = "#{@scope[:name_prefix]}_#{options[:as]}"
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elsif @scope[:name_prefix] && options[:as] == ""
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options[:as] = @scope[:name_prefix].to_s
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end
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args.push(options)
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super(*args)
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end
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private
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def scope_options
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@scope_options ||= private_methods.grep(/^merge_(.+)_scope$/) { $1.to_sym }
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end
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def merge_path_scope(parent, child)
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Mapper.normalize_path("#{parent}/#{child}")
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end
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def merge_name_prefix_scope(parent, child)
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parent ? "#{parent}_#{child}" : child
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end
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def merge_module_scope(parent, child)
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parent ? "#{parent}/#{child}" : child
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end
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def merge_controller_scope(parent, child)
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@scope[:module] ? "#{@scope[:module]}/#{child}" : child
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end
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def merge_path_names_scope(parent, child)
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merge_options_scope(parent, child)
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end
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def merge_constraints_scope(parent, child)
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merge_options_scope(parent, child)
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end
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def merge_defaults_scope(parent, child)
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merge_options_scope(parent, child)
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end
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def merge_blocks_scope(parent, child)
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(parent || []) + [child]
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end
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def merge_options_scope(parent, child)
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(parent || {}).merge(child)
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end
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end
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module Resources
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CRUD_ACTIONS = [:index, :show, :create, :update, :destroy] #:nodoc:
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class Resource #:nodoc:
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def self.default_actions
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[:index, :create, :new, :show, :update, :destroy, :edit]
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end
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attr_reader :controller, :path, :options
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def initialize(entities, options = {})
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@name = entities.to_s
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@path = options.delete(:path) || @name
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@controller = options.delete(:controller) || @name.to_s.pluralize
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@options = options
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end
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def default_actions
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self.class.default_actions
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end
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def actions
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if only = options[:only]
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Array(only).map(&:to_sym)
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elsif except = options[:except]
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default_actions - Array(except).map(&:to_sym)
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else
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default_actions
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end
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end
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def action_type(action)
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case action
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when :index, :create
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:collection
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when :show, :update, :destroy
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:member
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end
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end
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def name
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options[:as] || @name
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end
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def plural
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name.to_s.pluralize
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end
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def singular
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name.to_s.singularize
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end
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def member_prefix
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':id'
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end
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def member_name
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singular
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end
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# Checks for uncountable plurals, and appends "_index" if they're.
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def collection_name
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uncountable? ? "#{plural}_index" : plural
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end
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def uncountable?
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singular == plural
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end
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def name_for_action(action)
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case action_type(action)
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when :collection
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collection_name
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when :member
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member_name
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end
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end
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def id_segment
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":#{singular}_id"
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end
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def constraints
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options[:constraints] || {}
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end
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def id_constraint?
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options[:id] && options[:id].is_a?(Regexp) || constraints[:id] && constraints[:id].is_a?(Regexp)
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end
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def id_constraint
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options[:id] || constraints[:id]
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end
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def collection_options
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(options || {}).dup.tap do |options|
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options.delete(:id)
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options[:constraints] = options[:constraints].dup if options[:constraints]
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options[:constraints].delete(:id) if options[:constraints].is_a?(Hash)
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end
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end
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def nested_prefix
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id_segment
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end
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def nested_options
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options = { :name_prefix => member_name }
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options["#{singular}_id".to_sym] = id_constraint if id_constraint?
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options
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end
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end
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class SingletonResource < Resource #:nodoc:
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def self.default_actions
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[:show, :create, :update, :destroy, :new, :edit]
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end
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def initialize(entity, options = {})
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super
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end
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def action_type(action)
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case action
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when :show, :create, :update, :destroy
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:member
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end
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end
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def member_prefix
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''
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end
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def member_name
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name
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end
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def nested_prefix
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''
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end
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def nested_options
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{ :name_prefix => member_name }
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end
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end
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def initialize(*args) #:nodoc:
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super
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@scope[:path_names] = @set.resources_path_names
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end
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def resource(*resources, &block)
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options = resources.extract_options!
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options = (@scope[:options] || {}).merge(options)
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if apply_common_behavior_for(:resource, resources, options, &block)
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return self
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end
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resource = SingletonResource.new(resources.pop, options)
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scope(:path => resource.path, :controller => resource.controller) do
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with_scope_level(:resource, resource) do
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yield if block_given?
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with_scope_level(:member) do
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scope(resource.options) do
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get :show if resource.actions.include?(:show)
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post :create if resource.actions.include?(:create)
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put :update if resource.actions.include?(:update)
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delete :destroy if resource.actions.include?(:destroy)
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get :new, :as => resource.name if resource.actions.include?(:new)
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get :edit, :as => resource.name if resource.actions.include?(:edit)
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end
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end
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end
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end
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self
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end
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def resources(*resources, &block)
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options = resources.extract_options!
|
|
options = (@scope[:options] || {}).merge(options)
|
|
|
|
if apply_common_behavior_for(:resources, resources, options, &block)
|
|
return self
|
|
end
|
|
|
|
resource = Resource.new(resources.pop, options)
|
|
|
|
scope(:path => resource.path, :controller => resource.controller) do
|
|
with_scope_level(:resources, resource) do
|
|
yield if block_given?
|
|
|
|
with_scope_level(:collection) do
|
|
scope(resource.collection_options) 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
|
|
end
|
|
|
|
with_scope_level(:member) do
|
|
scope(':id') do
|
|
scope(resource.options) 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
|
|
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 resource_scope?
|
|
raise ArgumentError, "can't use member outside resource(s) scope"
|
|
end
|
|
|
|
with_scope_level(:member) do
|
|
scope(parent_resource.member_prefix, :name_prefix => parent_resource.member_name, :as => "") do
|
|
yield
|
|
end
|
|
end
|
|
end
|
|
|
|
def new
|
|
unless resource_scope?
|
|
raise ArgumentError, "can't use new outside resource(s) scope"
|
|
end
|
|
|
|
with_scope_level(:new) do
|
|
scope(new_scope_prefix, :name_prefix => parent_resource.member_name, :as => "") do
|
|
yield
|
|
end
|
|
end
|
|
end
|
|
|
|
def nested
|
|
unless resource_scope?
|
|
raise ArgumentError, "can't use nested outside resource(s) scope"
|
|
end
|
|
|
|
with_scope_level(:nested) do
|
|
scope(parent_resource.nested_prefix, parent_resource.nested_options) do
|
|
yield
|
|
end
|
|
end
|
|
end
|
|
|
|
def namespace(path)
|
|
if resource_scope?
|
|
nested { super }
|
|
else
|
|
super
|
|
end
|
|
end
|
|
|
|
def match(*args)
|
|
options = args.extract_options!
|
|
|
|
options[:anchor] = true unless options.key?(:anchor)
|
|
|
|
if args.length > 1
|
|
args.each { |path| match(path, options) }
|
|
return self
|
|
end
|
|
|
|
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_name_prefix(action, options)) do
|
|
return match("#{action_path(action, 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) }
|
|
when :new
|
|
return new { match(*args) }
|
|
end
|
|
|
|
if @scope[:scope_level] == :resource
|
|
return member { match(*args) }
|
|
end
|
|
|
|
if resource_scope?
|
|
raise ArgumentError, "can't define route directly in resource(s) scope"
|
|
end
|
|
|
|
super
|
|
end
|
|
|
|
def root(options={})
|
|
options[:on] ||= :collection if @scope[:scope_level] == :resources
|
|
super(options)
|
|
end
|
|
|
|
protected
|
|
def parent_resource #:nodoc:
|
|
@scope[:scope_level_resource]
|
|
end
|
|
|
|
private
|
|
def action_path(name, path_names = nil)
|
|
path_names ||= @scope[:path_names]
|
|
path_names[name.to_sym] || name.to_s
|
|
end
|
|
|
|
def action_name_prefix(action, options = {})
|
|
(options[:on] == :new || @scope[:scope_level] == :new) ? "#{action}_new" : action
|
|
end
|
|
|
|
def apply_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(:path_names => path_names) do
|
|
send(method, resources.pop, options, &block)
|
|
end
|
|
return true
|
|
end
|
|
|
|
if resource_scope?
|
|
nested do
|
|
send(method, resources.pop, options, &block)
|
|
end
|
|
return true
|
|
end
|
|
|
|
false
|
|
end
|
|
|
|
def new_scope_prefix
|
|
@scope[:path_names][:new] || 'new'
|
|
end
|
|
|
|
def resource_scope?
|
|
[:resource, :resources].include?(@scope[:scope_level])
|
|
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
|