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# TODO: Fix formatting on member/collection methods
module Rails
module Upgrading
module FakeRouter
module ActionController
module Routing
class Routes
def self.setup
@redrawer = Rails::Upgrading::RouteRedrawer.new
end
def self.redrawer
@redrawer
end
def self.draw
yield @redrawer
end
end
end
end
end
class RoutesUpgrader
def generate_new_routes
if has_routes_file?
upgrade_routes
else
raise FileNotFoundError, "Can't find your routes file [config/routes.rb]!"
end
end
def has_routes_file?
File.exists?("config/routes.rb")
end
def routes_code
File.read("config/routes.rb")
end
def upgrade_routes
FakeRouter::ActionController::Routing::Routes.setup
# Read and eval the file; our fake route mapper will capture
# the calls to draw routes and generate new route code
FakeRouter.module_eval(routes_code)
# Give the route set to the code generator and get its output
generator = RouteGenerator.new(FakeRouter::ActionController::Routing::Routes.redrawer.routes)
generator.generate
end
end
class RouteRedrawer
attr_accessor :routes
def self.stack
@stack
end
def self.stack=(val)
@stack = val
end
def initialize
@routes = []
# The old default route was actually two routes; we generate the new style
# one only if we haven't generated it for the first old default route.
@default_route_generated = false
# Setup the stack for parents; used use proper indentation
self.class.stack = [@routes]
end
def root(options)
debug "mapping root"
@routes << FakeRoute.new("/", options)
end
def connect(path, options={})
debug "connecting #{path}"
if (path == ":controller/:action/:id.:format" || path == ":controller/:action/:id")
if !@default_route_generated
current_parent << FakeRoute.new("/:controller(/:action(/:id))", {:default_route => true})
@default_route_generated = true
end
else
current_parent << FakeRoute.new(path, options)
end
end
def resources(*args, &block)
_res(FakeResourceRoute, args, &block)
end
def resource(*args, &block)
_res(FakeSingletonResourceRoute, args, &block)
end
def _res(klass, args)
if args.last.is_a?(Hash)
options = args.pop
debug "options #{options.inspect}"
end
args.each do |a|
current_parent << klass.new(a, options || {})
debug "mapping resources #{current_parent.last.name}"
if block_given?
parent = current_parent.last
parent = stack(parent) do
yield(self)
end
end
end
end
def namespace(name, options = {})
debug "mapping namespace #{name}"
namespace = FakeNamespace.new(name, options)
namespace = stack(namespace) do
yield(self)
end
current_parent << namespace
end
def method_missing(m, *args)
debug "named route: #{m}"
current_parent << FakeRoute.new(args.shift, args.pop, m.to_s)
end
def self.indent
' ' * ((stack.length) * 2)
end
private
def debug(txt)
puts txt if ENV['DEBUG']
end
def stack(obj)
self.class.stack << obj
yield
self.class.stack.pop
end
def current_parent
self.class.stack.last
end
end
class RouteObject
def indent_lines(code_lines)
if code_lines.length > 1
code_lines.flatten.map {|l| "#{@indent}#{l.chomp}"}.join("\n") + "\n"
else
"#{@indent}#{code_lines.shift}"
end
end
def opts_to_string(opts)
opts.is_a?(Hash) ? opts.map {|k, v|
":#{k} => " + (v.is_a?(Hash) ? ('{ ' + opts_to_string(v) + ' }') : "#{value_to_string(v)}")
}.join(", ") : opts.to_s
end
def value_to_string(value)
case value
when Regexp, Symbol, Array then value.inspect
when String then "'" + value.to_s + "'"
else value.to_s
end
end
end
class FakeNamespace < RouteObject
attr_accessor :routes, :name, :options
def initialize(name, options = {})
@routes = []
@name, @options = name, options
@indent = RouteRedrawer.indent
end
def to_route_code
if !@options.empty?
options = ', ' + opts_to_string(@options)
else
options = ''
end
lines = ["namespace :#{@name}#{options} do", @routes.map {|r| r.to_route_code}, "end"]
indent_lines(lines)
end
def <<(val)
@routes << val
end
def last
@routes.last
end
end
class FakeRoute < RouteObject
attr_accessor :name, :path, :options
def initialize(path, options, name = "")
@path = path
@options = options || {}
@name = name
@indent = RouteRedrawer.indent
end
def to_route_code
if @options[:default_route]
indent_lines ["match '#{@path}'"]
else
base = "match '%s' => '%s#%s'"
extra_options = []
if not name.empty?
extra_options << ":as => :#{name}"
end
if @options[:requirements]
@options[:constraints] = @options.delete(:requirements)
end
if @options[:conditions]
@options[:via] = @options.delete(:conditions).delete(:method)
end
@options ||= {}
base = (base % [@path, @options.delete(:controller), (@options.delete(:action) || "index")])
opts = opts_to_string(@options)
route_pieces = ([base] + extra_options + [opts])
route_pieces.delete("")
indent_lines [route_pieces.join(", ")]
end
end
end
class FakeResourceRoute < RouteObject
attr_accessor :name, :children
def initialize(name, options = {})
@name = name
@children = []
@options = options
@indent = RouteRedrawer.indent
end
def to_route_code
# preserve :only & :except options
copied_options = @options.reject { |k,v| ![:only, :except].member?(k) }
unless copied_options.empty?
copied_options_str = ", " + copied_options.map { |k, v| "#{k.inspect} => #{v.inspect}" }.join(",")
end
if !@children.empty? || @options.has_key?(:collection) || @options.has_key?(:member)
prefix = ["#{route_method} :#{@name}#{copied_options_str} do"]
lines = prefix + custom_methods + [@children.map {|r| r.to_route_code}.join("\n"), "end"]
indent_lines(lines)
else
base = "#{route_method} :%s#{copied_options_str}"
indent_lines [base % [@name]]
end
end
def custom_methods
collection_code = generate_custom_methods_for(:collection)
member_code = generate_custom_methods_for(:member)
[collection_code, member_code]
end
def generate_custom_methods_for(group)
return "" unless @options[group]
method_code = []
RouteRedrawer.stack << self
@options[group].each do |name, methods|
[*methods].each do |method|
method_code << "#{method} :#{name}"
end
end
RouteRedrawer.stack.pop
indent_lines ["#{group} do", method_code, "end"].flatten
end
def route_method
"resources"
end
def <<(val)
@children << val
end
def last
@children.last
end
end
class FakeSingletonResourceRoute < FakeResourceRoute
def route_method
"resource"
end
end
class RouteGenerator
def initialize(routes)
@routes = routes
@new_code = ""
end
def generate
@new_code = @routes.map do |r|
r.to_route_code
end.join("\n")
"#{app_name.underscore.classify}::Application.routes.draw do\n#{@new_code}\nend\n"
end
private
def app_name
File.basename(Dir.pwd)
end
end
end
end
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