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module ActionController #:nodoc:
module Flash
extend ActiveSupport::Concern
included do
class_attribute :_flash_types, instance_accessor: false
self._flash_types = []
delegate :flash, to: :request
add_flash_types(:alert, :notice)
end
module ClassMethods
# Creates new flash types. You can pass as many types as you want to create
# flash types other than the default <tt>alert</tt> and <tt>notice</tt> in
# your controllers and views. For instance:
#
# # in application_controller.rb
# class ApplicationController < ActionController::Base
# add_flash_types :warning
# end
#
# # in your controller
# redirect_to user_path(@user), warning: "Incomplete profile"
#
# # in your view
# <%= warning %>
#
# This method will automatically define a new method for each of the given
# names, and it will be available in your views.
def add_flash_types(*types)
types.each do |type|
next if _flash_types.include?(type)
define_method(type) do
request.flash[type]
end
helper_method type
self._flash_types += [type]
end
end
end
private
def redirect_to(options = {}, response_status_and_flash = {}) #:doc:
self.class._flash_types.each do |flash_type|
if type = response_status_and_flash.delete(flash_type)
flash[flash_type] = type
end
end
if other_flashes = response_status_and_flash.delete(:flash)
flash.update(other_flashes)
end
super(options, response_status_and_flash)
end
end
end
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