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require "rss/1.0"
module RSS
SY_PREFIX = 'sy'
SY_URI = "http://purl.org/rss/1.0/modules/syndication/"
RDF.install_ns(SY_PREFIX, SY_URI)
module SyndicationModel
extend BaseModel
ELEMENTS = []
def self.append_features(klass)
super
klass.install_must_call_validator(SY_PREFIX, SY_URI)
klass.module_eval do
[
["updatePeriod"],
["updateFrequency", :positive_integer]
].each do |name, type|
install_text_element(name, SY_URI, "?",
"#{SY_PREFIX}_#{name}", type,
"#{SY_PREFIX}:#{name}")
end
%w(updateBase).each do |name|
install_date_element(name, SY_URI, "?",
"#{SY_PREFIX}_#{name}", 'w3cdtf',
"#{SY_PREFIX}:#{name}")
end
end
klass.module_eval(<<-EOC, __FILE__, __LINE__ + 1)
alias_method(:_sy_updatePeriod=, :sy_updatePeriod=)
def sy_updatePeriod=(new_value)
new_value = new_value.strip
validate_sy_updatePeriod(new_value) if @do_validate
self._sy_updatePeriod = new_value
end
EOC
end
private
SY_UPDATEPERIOD_AVAILABLE_VALUES = %w(hourly daily weekly monthly yearly)
def validate_sy_updatePeriod(value)
unless SY_UPDATEPERIOD_AVAILABLE_VALUES.include?(value)
raise NotAvailableValueError.new("updatePeriod", value)
end
end
end
class RDF
class Channel; include SyndicationModel; end
end
prefix_size = SY_PREFIX.size + 1
SyndicationModel::ELEMENTS.uniq!
SyndicationModel::ELEMENTS.each do |full_name|
name = full_name[prefix_size..-1]
BaseListener.install_get_text_element(SY_URI, name, full_name)
end
end
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