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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.module_eval(<<-EOC, *get_file_and_line_from_caller(1))
%w(updatePeriod updateFrequency).each do |name|
install_text_element("\#{SY_PREFIX}_\#{name}")
end
%w(updateBase).each do |name|
install_date_element("\#{SY_PREFIX}_\#{name}", 'w3cdtf', name)
end
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
alias_method(:_sy_updateFrequency=, :sy_updateFrequency=)
def sy_updateFrequency=(new_value)
validate_sy_updateFrequency(new_value) if @do_validate
self._sy_updateFrequency = new_value.to_i
end
EOC
end
def sy_validate(tags)
counter = {}
ELEMENTS.each do |name|
counter[name] = 0
end
tags.each do |tag|
key = "#{SY_PREFIX}_#{tag}"
raise UnknownTagError.new(tag, SY_URI) unless counter.has_key?(key)
counter[key] += 1
raise TooMuchTagError.new(tag, tag_name) if counter[key] > 1
end
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
SY_UPDATEFREQUENCY_AVAILABLE_RE = /\A\s*\+?\d+\s*\z/
def validate_sy_updateFrequency(value)
value = value.to_s.strip
if SY_UPDATEFREQUENCY_AVAILABLE_RE !~ value
raise NotAvailableValueError.new("updateFrequency", 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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