From 2e9af3638d950ef840e1287f99e323887ec6a4c4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Valim?= <jose.valim@gmail.com>
Date: Thu, 29 Apr 2010 12:27:25 +0200
Subject: Move several configuration values from Hash to
 ActiveSupport::XmlMini, which both Hash and Array depends on.

Also, refactored ActiveModel serializers to just use ActiveSupport::XmlMini.to_tag. As consequence, if a serialized attribute is an array or a hash, it's not encoded as yaml, but as a hash or array.
---
 activesupport/lib/active_support/xml_mini.rb | 127 ++++++++++++++++++++++++++-
 1 file changed, 126 insertions(+), 1 deletion(-)

(limited to 'activesupport/lib/active_support/xml_mini.rb')

diff --git a/activesupport/lib/active_support/xml_mini.rb b/activesupport/lib/active_support/xml_mini.rb
index f22fbcc0e1..7594d7b68b 100644
--- a/activesupport/lib/active_support/xml_mini.rb
+++ b/activesupport/lib/active_support/xml_mini.rb
@@ -9,6 +9,71 @@ module ActiveSupport
   module XmlMini
     extend self
 
+    # 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
+
+    DEFAULT_ENCODINGS = {
+      "binary" => "base64"
+    } unless defined?(TYPE_NAMES)
+
+    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?(TYPE_NAMES)
+
+    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?(FORMATTING)
+
+    # TODO: use Time.xmlschema instead of Time.parse;
+    #       use regexp instead of Date.parse
+    unless defined?(PARSING)
+      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 { |bin, entity| _parse_binary(bin, entity) },
+        "file"         => Proc.new { |file, entity| _parse_file(file, entity) }
+      }
+
+      PARSING.update(
+        "double"   => PARSING["float"],
+        "dateTime" => PARSING["datetime"]
+      )
+    end
+
     attr_reader :backend
     delegate :parse, :to => :backend
 
@@ -16,7 +81,7 @@ module ActiveSupport
       if name.is_a?(Module)
         @backend = name
       else
-        require "active_support/xml_mini/#{name.to_s.downcase}.rb"
+        require "active_support/xml_mini/#{name.to_s.downcase}"
         @backend = ActiveSupport.const_get("XmlMini_#{name}")
       end
     end
@@ -27,6 +92,66 @@ module ActiveSupport
     ensure
       self.backend = old_backend
     end
+
+    def to_tag(key, value, options)
+      type_name = options.delete(:type)
+      merged_options = options.merge(:root => key, :skip_instruct => true)
+
+      if value.is_a?(::Method) || value.is_a?(::Proc)
+        if value.arity == 1
+          value.call(merged_options)
+        else
+          value.call(merged_options, key.to_s.singularize)
+        end
+      elsif value.respond_to?(:to_xml)
+        value.to_xml(merged_options)
+      else
+        type_name ||= TYPE_NAMES[value.class.name]
+        type_name ||= value.class.name if value && !value.respond_to?(:to_str)
+        type_name   = type_name.to_s   if type_name
+
+        key = rename_key(key.to_s, options)
+
+        attributes = options[:skip_types] || type_name.nil? ? { } : { :type => type_name }
+        attributes[:nil] = true if value.nil?
+
+        encoding = options[:encoding] || DEFAULT_ENCODINGS[type_name]
+        attributes[:encoding] = encoding if encoding
+
+        formatted_value = FORMATTING[type_name] && !value.nil? ?
+          FORMATTING[type_name].call(value) : value
+
+        options[:builder].tag!(key, formatted_value, attributes)
+      end
+    end
+
+    def rename_key(key, options = {})
+      camelize  = options.has_key?(:camelize) && options[:camelize]
+      dasherize = !options.has_key?(:dasherize) || options[:dasherize]
+      key = key.camelize  if camelize
+      key = key.dasherize if dasherize
+      key
+    end
+
+    protected
+
+	  # TODO: Add support for other encodings
+    def _parse_binary(bin, entity) #:nodoc:
+      case entity['encoding']
+      when 'base64'
+        ActiveSupport::Base64.decode64(bin)
+      else
+        bin
+      end
+    end
+
+    def _parse_file(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
   end
 
   XmlMini.backend = 'REXML'
-- 
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