* 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, 235 insertions, 0 deletions

diff --git a/lib/rss/trackback.rb b/lib/rss/trackback.rb
new file mode 100644
index 0000000000..5c7ca777bd
--- /dev/null
+++ b/lib/rss/trackback.rb
@@ -0,0 +1,235 @@
+# ATTENSION:
+#  TrackBack handling API MUST be CHANGED!!!!
+
+require 'rss/1.0'
+require 'rss/2.0'
+
+module RSS
+
+  TRACKBACK_PREFIX = 'trackback'
+  TRACKBACK_URI = 'http://madskills.com/public/xml/rss/module/trackback/'
+
+  RDF.install_ns(TRACKBACK_PREFIX, TRACKBACK_URI)
+  Rss.install_ns(TRACKBACK_PREFIX, TRACKBACK_URI)
+
+	module BaseTrackBackModel
+    def trackback_validate(tags)
+			raise unless @do_validate
+      counter = {}
+      %w(ping about).each do |x|
+				counter["#{TRACKBACK_PREFIX}_#{x}"] = 0
+			end
+
+      tags.each do |tag|
+        key = "#{TRACKBACK_PREFIX}_#{tag}"
+        raise UnknownTagError.new(tag, TRACKBACK_URI) unless counter.has_key?(key)
+        counter[key] += 1
+				if tag != "about" and counter[key] > 1
+					raise TooMuchTagError.new(tag, tag_name)
+				end
+			end
+
+			if counter["#{TRACKBACK_PREFIX}_ping"].zero? and
+					counter["#{TRACKBACK_PREFIX}_about"].nonzero?
+				raise MissingTagError.new("#{TRACKBACK_PREFIX}:ping", tag_name)
+			end
+		end
+	end
+
+  module TrackBackModel10
+    extend BaseModel
+		include BaseTrackBackModel
+
+		def self.append_features(klass)
+			super
+
+			unless klass.class == Module
+				%w(ping).each do |x|
+					klass.install_have_child_element("#{TRACKBACK_PREFIX}_#{x}")
+				end
+				
+				%w(about).each do |x|
+					klass.install_have_children_element("#{TRACKBACK_PREFIX}_#{x}")
+				end
+			end
+		end
+
+		class Ping < Element
+			include RSS10
+
+			class << self
+
+				def required_prefix
+					TRACKBACK_PREFIX
+				end
+				
+				def required_uri
+					TRACKBACK_URI
+				end
+
+			end
+			
+			[
+				["resource", ::RSS::RDF::URI, true]
+			].each do |name, uri, required|
+				install_get_attribute(name, uri, required)
+			end
+
+			def initialize(resource=nil)
+				super()
+				@resource = resource
+			end
+
+			def to_s(convert=true)
+				if @resource
+					rv = %Q!<#{TRACKBACK_PREFIX}:ping #{::RSS::RDF::PREFIX}:resource="#{h @resource}"/>!
+					rv = @converter.convert(rv) if convert and @converter
+					rv
+				else
+					''
+				end
+			end
+
+			private
+			def _attrs
+				[
+					["resource", true],
+				]
+			end
+
+		end
+
+		class About < Element
+			include RSS10
+
+			class << self
+				
+				def required_prefix
+					TRACKBACK_PREFIX
+				end
+				
+				def required_uri
+					TRACKBACK_URI
+				end
+
+			end
+			
+			[
+				["resource", ::RSS::RDF::URI, true]
+			].each do |name, uri, required|
+				install_get_attribute(name, uri, required)
+			end
+
+			def initialize(resource=nil)
+				super()
+				@resource = resource
+			end
+
+			def to_s(convert=true)
+				if @resource
+					rv = %Q!<#{TRACKBACK_PREFIX}:about #{::RSS::RDF::PREFIX}:resource="#{h @resource}"/>!
+					rv = @converter.convert(rv) if convert and @converter
+					rv
+				else
+					''
+				end
+			end
+
+			private
+			def _attrs
+				[
+					["resource", true],
+				]
+			end
+
+		end
+	end
+
+	module TrackBackModel20
+		include BaseTrackBackModel
+		extend BaseModel
+
+		def self.append_features(klass)
+			super
+
+			unless klass.class == Module
+				%w(ping).each do |x|
+					klass.install_have_child_element("#{TRACKBACK_PREFIX}_#{x}")
+				end
+				
+				%w(about).each do |x|
+					klass.install_have_children_element("#{TRACKBACK_PREFIX}_#{x}")
+				end
+			end
+		end
+
+		class Ping < Element
+			include RSS09
+
+			content_setup
+
+			class << self
+
+				def required_prefix
+					TRACKBACK_PREFIX
+				end
+				
+				def required_uri
+					TRACKBACK_URI
+				end
+
+			end
+			
+			def to_s(convert=true)
+				if @content
+					rv = %Q!<#{TRACKBACK_PREFIX}:ping>#{h @content}</#{TRACKBACK_PREFIX}:ping>!
+					rv = @converter.convert(rv) if convert and @converter
+					rv
+				else
+					''
+				end
+			end
+
+		end
+
+		class About < Element
+			include RSS09
+
+			content_setup
+
+			class << self
+				
+				def required_prefix
+					TRACKBACK_PREFIX
+				end
+				
+				def required_uri
+					TRACKBACK_URI
+				end
+
+			end
+			
+			def to_s(convert=true)
+				if @content
+					rv = %Q!<#{TRACKBACK_PREFIX}:about>#{h @content}</#{TRACKBACK_PREFIX}:about>!
+					rv = @converter.convert(rv) if convert and @converter
+					rv
+				else
+					''
+				end
+			end
+
+		end
+	end
+
+  class RDF
+    class Item; include TrackBackModel10; end
+  end
+
+	class Rss
+		class Channel
+			class Item; include TrackBackModel20; end
+		end
+	end
+
+end