* lib/rss: rss library imported. [ruby-dev:22726]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5566 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 56 insertions, 0 deletions

diff --git a/lib/rss/dublincore.rb b/lib/rss/dublincore.rb
new file mode 100644
index 0000000000..e9c3fcac2d
--- /dev/null
+++ b/lib/rss/dublincore.rb
@@ -0,0 +1,56 @@
+require "rss/1.0"
+
+module RSS
+
+	DC_PREFIX = 'dc'
+	DC_URI = "http://purl.org/dc/elements/1.1/"
+	
+	RDF.install_ns(DC_PREFIX, DC_URI)
+
+	module DublincoreModel
+
+		extend BaseModel
+
+		ELEMENTS = []
+
+		%w(title description creator subject publisher
+		   contributor type format identifier source
+		   language relation coverage rights).each do |x|
+				install_text_element("#{DC_PREFIX}_#{x}")
+		end
+
+		%w(date).each do |x|
+			install_date_element("#{DC_PREFIX}_#{x}", 'iso8601', x)
+		end
+
+		def dc_validate(tags)
+			counter = {}
+			ELEMENTS.each do |x|
+				counter[x] = 0
+			end
+
+			tags.each do |tag|
+				key = "#{DC_PREFIX}_#{tag}"
+				raise UnknownTagError.new(tag, DC_URI)  unless counter.has_key?(key)
+				counter[key] += 1
+				raise TooMuchTagError.new(tag, tag_name) if counter[key] > 1
+			end
+		end
+
+	end
+
+	class RDF
+		class Channel; include DublincoreModel; end
+		class Image; include DublincoreModel; end
+		class Item; include DublincoreModel; end
+		class Textinput; include DublincoreModel; end
+	end
+
+	if const_defined? :BaseListener
+		prefix_size = DC_PREFIX.size + 1
+		DublincoreModel::ELEMENTS.each do |x|
+			BaseListener.install_get_text_element(x[prefix_size..-1], DC_URI, "#{x}=")
+		end
+	end
+
+end