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require "rss/1.0"
require "rss/dublincore"
module RSS
TAXO_PREFIX = "taxo"
TAXO_URI = "http://purl.org/rss/1.0/modules/taxonomy/"
RDF.install_ns(TAXO_PREFIX, TAXO_URI)
TAXO_ELEMENTS = []
%w(link).each do |name|
full_name = "#{TAXO_PREFIX}_#{name}"
BaseListener.install_get_text_element(TAXO_URI, name, "#{full_name}=")
TAXO_ELEMENTS << "#{TAXO_PREFIX}_#{name}"
end
%w(topic topics).each do |name|
class_name = Utils.to_class_name(name)
BaseListener.install_class_name(TAXO_URI, name, "Taxonomy#{class_name}")
TAXO_ELEMENTS << "#{TAXO_PREFIX}_#{name}"
end
module TaxonomyTopicsModel
extend BaseModel
def self.append_features(klass)
super
var_name = "#{TAXO_PREFIX}_topics"
klass.install_have_child_element(var_name)
end
def taxo_validate(tags)
found_topics = false
tags.each do |tag|
if tag == "topics"
if found_topics
raise TooMuchTagError.new(tag, tag_name)
else
found_topics = true
end
else
raise UnknownTagError.new(tag, TAXO_URI)
end
end
end
class TaxonomyTopics < Element
include RSS10
Bag = ::RSS::RDF::Bag
class << self
def required_prefix
TAXO_PREFIX
end
def required_uri
TAXO_URI
end
end
@tag_name = "topics"
install_have_child_element("Bag")
install_must_call_validator('rdf', ::RSS::RDF::URI)
def initialize(bag=Bag.new)
super()
@Bag = bag
end
def full_name
tag_name_with_prefix(TAXO_PREFIX)
end
def maker_target(target)
target.taxo_topics
end
def to_s(need_convert=true, indent=calc_indent)
rv = tag(indent) do |next_indent|
[
Bag_element(need_convert, next_indent),
other_element(need_convert, next_indent),
]
end
end
def resources
if @Bag
@Bag.lis.collect do |li|
li.resource
end
else
[]
end
end
private
def children
[@Bag]
end
def _tags
rv = []
rv << [::RSS::RDF::URI, 'Bag'] unless @Bag.nil?
rv
end
def rdf_validate(tags)
_validate(tags, [["Bag", nil]])
end
end
end
module TaxonomyTopicModel
extend BaseModel
def self.append_features(klass)
super
var_name = "#{TAXO_PREFIX}_topic"
klass.install_have_children_element(var_name)
end
def taxo_validate(tags)
tags.each do |tag|
if tag != "topic"
raise UnknownTagError.new(tag, TAXO_URI)
end
end
end
class TaxonomyTopic < Element
include RSS10
include DublinCoreModel
include TaxonomyTopicsModel
class << self
def required_prefix
TAXO_PREFIX
end
def required_uri
TAXO_URI
end
end
@tag_name = "topic"
install_get_attribute("about", ::RSS::RDF::URI, true)
install_text_element("#{TAXO_PREFIX}_link")
def initialize(about=nil)
super()
@about = about
end
def full_name
tag_name_with_prefix(TAXO_PREFIX)
end
def to_s(need_convert=true, indent=calc_indent)
rv = tag(indent) do |next_indent|
[
other_element(need_convert, next_indent),
]
end
end
def taxo_validate(tags)
elements = %w(link topics)
counter = {}
tags.each do |tag|
if elements.include?(tag)
counter[tag] ||= 0
counter[tag] += 1
raise TooMuchTagError.new(tag, tag_name) if counter[tag] > 1
else
raise UnknownTagError.new(tag, TAXO_URI)
end
end
end
def maker_target(target)
target.new_taxo_topic
end
private
def children
[@taxo_link, @taxo_topics]
end
def _attrs
[
["#{RDF::PREFIX}:about", true, "about"]
]
end
def _tags
rv = []
rv << [TAXO_URI, "link"] unless @taxo_link.nil?
rv << [TAXO_URI, "topics"] unless @taxo_topics.nil?
rv
end
end
end
class RDF
include TaxonomyTopicModel
class Channel
include TaxonomyTopicsModel
end
class Item; include TaxonomyTopicsModel; end
end
end
|
