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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 = []
def self.append_features(klass)
super
klass.module_eval(<<-EOC)
%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}", 'w3cdtf', x)
end
EOC
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
# For backward compatibility
DublincoreModel = DublinCoreModel
class RDF
class Channel; include DublinCoreModel; end
class Image; include DublinCoreModel; end
class Item; include DublinCoreModel; end
class Textinput; include DublinCoreModel; end
end
prefix_size = DC_PREFIX.size + 1
DublinCoreModel::ELEMENTS.uniq!
DublinCoreModel::ELEMENTS.each do |x|
BaseListener.install_get_text_element(x[prefix_size..-1], DC_URI, "#{x}=")
end
end
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