87 lines
2.3 KiB
Ruby
87 lines
2.3 KiB
Ruby
require "rss/1.0"
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module RSS
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SY_PREFIX = 'sy'
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SY_URI = "http://purl.org/rss/1.0/modules/syndication/"
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RDF.install_ns(SY_PREFIX, SY_URI)
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module SyndicationModel
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extend BaseModel
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ELEMENTS = []
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def self.append_features(klass)
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super
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klass.module_eval(<<-EOC, *get_file_and_line_from_caller(1))
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%w(updatePeriod updateFrequency).each do |name|
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install_text_element("\#{SY_PREFIX}_\#{name}")
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end
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%w(updateBase).each do |name|
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install_date_element("\#{SY_PREFIX}_\#{name}", 'w3cdtf', name)
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end
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alias_method(:_sy_updatePeriod=, :sy_updatePeriod=)
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def sy_updatePeriod=(new_value)
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new_value = new_value.strip
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validate_sy_updatePeriod(new_value) if @do_validate
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self._sy_updatePeriod = new_value
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end
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alias_method(:_sy_updateFrequency=, :sy_updateFrequency=)
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def sy_updateFrequency=(new_value)
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validate_sy_updateFrequency(new_value) if @do_validate
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self._sy_updateFrequency = new_value.to_i
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end
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EOC
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end
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def sy_validate(tags)
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counter = {}
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ELEMENTS.each do |name|
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counter[name] = 0
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end
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tags.each do |tag|
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key = "#{SY_PREFIX}_#{tag}"
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raise UnknownTagError.new(tag, SY_URI) unless counter.has_key?(key)
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counter[key] += 1
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raise TooMuchTagError.new(tag, tag_name) if counter[key] > 1
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end
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end
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private
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SY_UPDATEPERIOD_AVAILABLE_VALUES = %w(hourly daily weekly monthly yearly)
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def validate_sy_updatePeriod(value)
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unless SY_UPDATEPERIOD_AVAILABLE_VALUES.include?(value)
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raise NotAvailableValueError.new("updatePeriod", value)
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end
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end
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SY_UPDATEFREQUENCY_AVAILABLE_RE = /\A\s*\+?\d+\s*\z/
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def validate_sy_updateFrequency(value)
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value = value.to_s.strip
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if SY_UPDATEFREQUENCY_AVAILABLE_RE !~ value
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raise NotAvailableValueError.new("updateFrequency", value)
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end
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end
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end
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class RDF
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class Channel; include SyndicationModel; end
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end
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prefix_size = SY_PREFIX.size + 1
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SyndicationModel::ELEMENTS.uniq!
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SyndicationModel::ELEMENTS.each do |full_name|
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name = full_name[prefix_size..-1]
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BaseListener.install_get_text_element(SY_URI, name, "#{full_name}=")
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end
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end
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