1  require 'libxml'
   2 
   3  # = XmlMini LibXML implementation
   4  module ActiveSupport
   5    module XmlMini_LibXML #:nodoc:
   6      extend self
   7 
   8      # Parse an XML Document string into a simple hash using libxml.
   9      # string::
  10      #   XML Document string to parse
  11      def parse(string)
  12        if string.blank?
  13          {}
  14        else
  15          LibXML::XML::Parser.string(string.strip).parse.to_hash
  16        end
  17      end
  18    end
  19  end
  20 
  21  module LibXML
  22    module Conversions
  23      module Document
  24        def to_hash
  25          root.to_hash
  26        end
  27      end
  28 
  29      module Node
  30        CONTENT_ROOT = '__content__'.freeze
  31 
  32        # Convert XML document to hash
  33        #
  34        # hash::
  35        #   Hash to merge the converted element into.
  36        def to_hash(hash={})
  37          node_hash = {}
  38 
  39          # Insert node hash into parent hash correctly.
  40          case hash[name]
  41            when Array then hash[name] << node_hash
  42            when Hash  then hash[name] = [hash[name], node_hash]
  43            when nil   then hash[name] = node_hash
  44            else raise "Unexpected error during hash insertion!"
  45          end
  46 
  47          # Handle child elements
  48          each_child do |c|
  49            if c.element?
  50              c.to_hash(node_hash)
  51            elsif c.text? || c.cdata?
  52              node_hash[CONTENT_ROOT] ||= ''
  53              node_hash[CONTENT_ROOT] << c.content
  54            end
  55          end
  56 
  57 
  58          # Remove content node if it is blank
  59          if node_hash.length > 1 && node_hash[CONTENT_ROOT].blank?
  60            node_hash.delete(CONTENT_ROOT)
  61          end
  62 
  63          # Handle attributes
  64          each_attr { |a| node_hash[a.name] = a.value }
  65 
  66          hash
  67        end
  68      end
  69    end
  70  end
  71 
  72  LibXML::XML::Document.send(:include, LibXML::Conversions::Document)
  73  LibXML::XML::Node.send(:include, LibXML::Conversions::Node)