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require 'active_support/time'
require 'active_support/core_ext/array/wrap'
require 'active_support/core_ext/hash/reverse_merge'
require 'active_support/core_ext/object/blank'
require 'active_support/core_ext/string/inflections'
require 'active_support/core_ext/hash/conversions_xml_value'
class Hash
# This module exists to decorate files deserialized using Hash.from_xml with
# the <tt>original_filename</tt> and <tt>content_type</tt> methods.
module FileLike #:nodoc:
attr_writer :original_filename, :content_type
def original_filename
@original_filename || 'untitled'
end
def content_type
@content_type || 'application/octet-stream'
end
end
include XmlValue
XML_TYPE_NAMES = {
"Symbol" => "symbol",
"Fixnum" => "integer",
"Bignum" => "integer",
"BigDecimal" => "decimal",
"Float" => "float",
"TrueClass" => "boolean",
"FalseClass" => "boolean",
"Date" => "date",
"DateTime" => "datetime",
"Time" => "datetime",
"Array" => "array",
"Hash" => "hash"
} unless defined?(XML_TYPE_NAMES)
XML_FORMATTING = {
"symbol" => Proc.new { |symbol| symbol.to_s },
"date" => Proc.new { |date| date.to_s(:db) },
"datetime" => Proc.new { |time| time.xmlschema },
"binary" => Proc.new { |binary| ActiveSupport::Base64.encode64(binary) },
"yaml" => Proc.new { |yaml| yaml.to_yaml }
} unless defined?(XML_FORMATTING)
# TODO: use Time.xmlschema instead of Time.parse;
# use regexp instead of Date.parse
unless defined?(XML_PARSING)
XML_PARSING = {
"symbol" => Proc.new { |symbol| symbol.to_sym },
"date" => Proc.new { |date| ::Date.parse(date) },
"datetime" => Proc.new { |time| ::Time.parse(time).utc rescue ::DateTime.parse(time).utc },
"integer" => Proc.new { |integer| integer.to_i },
"float" => Proc.new { |float| float.to_f },
"decimal" => Proc.new { |number| BigDecimal(number) },
"boolean" => Proc.new { |boolean| %w(1 true).include?(boolean.strip) },
"string" => Proc.new { |string| string.to_s },
"yaml" => Proc.new { |yaml| YAML::load(yaml) rescue yaml },
"base64Binary" => Proc.new { |bin| ActiveSupport::Base64.decode64(bin) },
"binary" => Proc.new do |bin, entity|
case entity['encoding']
when 'base64'
ActiveSupport::Base64.decode64(bin)
# TODO: Add support for other encodings
else
bin
end
end,
"file" => Proc.new do |file, entity|
f = StringIO.new(ActiveSupport::Base64.decode64(file))
f.extend(FileLike)
f.original_filename = entity['name']
f.content_type = entity['content_type']
f
end
}
XML_PARSING.update(
"double" => XML_PARSING["float"],
"dateTime" => XML_PARSING["datetime"]
)
end
# Returns a string containing an XML representation of its receiver:
#
# {"foo" => 1, "bar" => 2}.to_xml
# # =>
# # <?xml version="1.0" encoding="UTF-8"?>
# # <hash>
# # <foo type="integer">1</foo>
# # <bar type="integer">2</bar>
# # </hash>
#
# To do so, the method loops over the pairs and builds nodes that depend on
# the _values_. Given a pair +key+, +value+:
#
# * If +value+ is a hash there's a recursive call with +key+ as <tt>:root</tt>.
#
# * If +value+ is an array there's a recursive call with +key+ as <tt>:root</tt>,
# and +key+ singularized as <tt>:children</tt>.
#
# * If +value+ is a callable object it must expect one or two arguments. Depending
# on the arity, the callable is invoked with the +options+ hash as first argument
# with +key+ as <tt>:root</tt>, and +key+ singularized as second argument. Its
# return value becomes a new node.
#
# * If +value+ responds to +to_xml+ the method is invoked with +key+ as <tt>:root</tt>.
#
# * Otherwise, a node with +key+ as tag is created with a string representation of
# +value+ as text node. If +value+ is +nil+ an attribute "nil" set to "true" is added.
# Unless the option <tt>:skip_types</tt> exists and is true, an attribute "type" is
# added as well according to the following mapping:
#
# XML_TYPE_NAMES = {
# "Symbol" => "symbol",
# "Fixnum" => "integer",
# "Bignum" => "integer",
# "BigDecimal" => "decimal",
# "Float" => "float",
# "TrueClass" => "boolean",
# "FalseClass" => "boolean",
# "Date" => "date",
# "DateTime" => "datetime",
# "Time" => "datetime"
# }
#
# By default the root node is "hash", but that's configurable via the <tt>:root</tt> option.
#
# The default XML builder is a fresh instance of <tt>Builder::XmlMarkup</tt>. You can
# configure your own builder with the <tt>:builder</tt> option. The method also accepts
# options like <tt>:dasherize</tt> and friends, they are forwarded to the builder.
def to_xml(options = {})
require 'builder' unless defined?(Builder)
options = options.dup
options[:indent] ||= 2
options.reverse_merge!({ :builder => Builder::XmlMarkup.new(:indent => options[:indent]),
:root => "hash" })
options[:builder].instruct! unless options.delete(:skip_instruct)
root = rename_key(options[:root].to_s, options)
# common upto this point
options[:builder].__send__(:method_missing, root) do
each do |key, value|
xml_value(key, value, options)
end
yield options[:builder] if block_given?
end
end
class << self
def from_xml(xml)
typecast_xml_value(unrename_keys(ActiveSupport::XmlMini.parse(xml)))
end
private
def typecast_xml_value(value)
case value.class.to_s
when 'Hash'
if value['type'] == 'array'
child_key, entries = Array.wrap(value.detect { |k,v| k != 'type' }) # child_key is throwaway
if entries.nil? || (c = value['__content__'] && c.blank?)
[]
else
case entries.class.to_s # something weird with classes not matching here. maybe singleton methods breaking is_a?
when "Array"
entries.collect { |v| typecast_xml_value(v) }
when "Hash"
[typecast_xml_value(entries)]
else
raise "can't typecast #{entries.inspect}"
end
end
elsif value.has_key?("__content__")
content = value["__content__"]
if parser = XML_PARSING[value["type"]]
if parser.arity == 2
XML_PARSING[value["type"]].call(content, value)
else
XML_PARSING[value["type"]].call(content)
end
else
content
end
elsif value['type'] == 'string' && value['nil'] != 'true'
""
# blank or nil parsed values are represented by nil
elsif value.blank? || value['nil'] == 'true'
nil
# If the type is the only element which makes it then
# this still makes the value nil, except if type is
# a XML node(where type['value'] is a Hash)
elsif value['type'] && value.size == 1 && !value['type'].is_a?(::Hash)
nil
else
xml_value = value.inject({}) do |h,(k,v)|
h[k] = typecast_xml_value(v)
h
end
# Turn { :files => { :file => #<StringIO> } into { :files => #<StringIO> } so it is compatible with
# how multipart uploaded files from HTML appear
xml_value["file"].is_a?(StringIO) ? xml_value["file"] : xml_value
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.class.name} - #{value.inspect}"
end
end
def unrename_keys(params)
case params.class.to_s
when "Hash"
params.inject({}) do |h,(k,v)|
h[k.to_s.tr("-", "_")] = unrename_keys(v)
h
end
when "Array"
params.map { |v| unrename_keys(v) }
else
params
end
end
end
end
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