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require 'date'
require 'xml_simple'
require 'cgi'
# Extensions needed for Hash#to_query
class Object
def to_param #:nodoc:
to_s
end
def to_query(key) #:nodoc:
"#{CGI.escape(key.to_s)}=#{CGI.escape(to_param.to_s)}"
end
end
class Array
def to_query(key) #:nodoc:
collect { |value| value.to_query("#{key}[]") } * '&'
end
end
module ActiveSupport #:nodoc:
module CoreExtensions #:nodoc:
module Hash #:nodoc:
module Conversions
XML_TYPE_NAMES = {
"Fixnum" => "integer",
"Bignum" => "integer",
"BigDecimal" => "numeric",
"Float" => "float",
"Date" => "date",
"DateTime" => "datetime",
"Time" => "datetime",
"TrueClass" => "boolean",
"FalseClass" => "boolean"
} unless defined? XML_TYPE_NAMES
XML_FORMATTING = {
"date" => Proc.new { |date| date.to_s(:db) },
"datetime" => Proc.new { |time| time.xmlschema },
"binary" => Proc.new { |binary| Base64.encode64(binary) },
"yaml" => Proc.new { |yaml| yaml.to_yaml }
} unless defined? XML_FORMATTING
def self.included(klass)
klass.extend(ClassMethods)
end
def to_query(namespace = nil)
collect do |key, value|
value.to_query(namespace ? "#{namespace}[#{key}]" : key)
end.sort * '&'
end
def to_xml(options = {})
options[:indent] ||= 2
options.reverse_merge!({ :builder => Builder::XmlMarkup.new(:indent => options[:indent]),
:root => "hash" })
options[:builder].instruct! unless options.delete(:skip_instruct)
dasherize = !options.has_key?(:dasherize) || options[:dasherize]
root = dasherize ? options[:root].to_s.dasherize : options[:root].to_s
options[:builder].__send__(:method_missing, root) do
each do |key, value|
case value
when ::Hash
value.to_xml(options.merge({ :root => key, :skip_instruct => true }))
when ::Array
value.to_xml(options.merge({ :root => key, :children => key.to_s.singularize, :skip_instruct => true}))
when ::Method, ::Proc
# If the Method or Proc takes two arguments, then
# pass the suggested child element name. This is
# used if the Method or Proc will be operating over
# multiple records and needs to create an containing
# element that will contain the objects being
# serialized.
if 1 == value.arity
value.call(options.merge({ :root => key, :skip_instruct => true }))
else
value.call(options.merge({ :root => key, :skip_instruct => true }), key.to_s.singularize)
end
else
if value.respond_to?(:to_xml)
value.to_xml(options.merge({ :root => key, :skip_instruct => true }))
else
type_name = XML_TYPE_NAMES[value.class.name]
key = dasherize ? key.to_s.dasherize : key.to_s
attributes = options[:skip_types] || value.nil? || type_name.nil? ? { } : { :type => type_name }
if value.nil?
attributes[:nil] = true
end
options[:builder].tag!(key,
XML_FORMATTING[type_name] ? XML_FORMATTING[type_name].call(value) : value,
attributes
)
end
end
end
end
end
module ClassMethods
def from_xml(xml)
# TODO: Refactor this into something much cleaner that doesn't rely on XmlSimple
typecast_xml_value(undasherize_keys(XmlSimple.xml_in(xml,
'forcearray' => false,
'forcecontent' => true,
'keeproot' => true,
'contentkey' => '__content__')
))
end
def create_from_xml(xml)
ActiveSupport::Deprecation.warn("Hash.create_from_xml has been renamed to Hash.from_xml", caller)
from_xml(xml)
end
private
def typecast_xml_value(value)
case value.class.to_s
when "Hash"
if value.has_key?("__content__")
content = translate_xml_entities(value["__content__"])
case value["type"]
when "integer" then content.to_i
when "boolean" then content.strip == "true"
when "datetime" then ::Time.parse(content).utc
when "date" then ::Date.parse(content)
when "yaml" then YAML::load(content) rescue content
else content
end
else
(value.blank? || value['type'] || value['nil'] == 'true') ? nil : value.inject({}) do |h,(k,v)|
h[k] = typecast_xml_value(v)
h
end
end
when "Array"
value.map! { |i| typecast_xml_value(i) }
case value.length
when 0 then nil
when 1 then value.first
else value
end
when "String"
value
else
raise "can't typecast #{value.inspect}"
end
end
def translate_xml_entities(value)
value.gsub(/</, "<").
gsub(/>/, ">").
gsub(/"/, '"').
gsub(/'/, "'").
gsub(/&/, "&")
end
def undasherize_keys(params)
case params.class.to_s
when "Hash"
params.inject({}) do |h,(k,v)|
h[k.to_s.tr("-", "_")] = undasherize_keys(v)
h
end
when "Array"
params.map { |v| undasherize_keys(v) }
else
params
end
end
end
end
end
end
end
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