161 lines
4.1 KiB
Ruby
161 lines
4.1 KiB
Ruby
require "rss/1.0"
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module RSS
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DC_PREFIX = 'dc'
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DC_URI = "http://purl.org/dc/elements/1.1/"
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RDF.install_ns(DC_PREFIX, DC_URI)
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module BaseDublinCoreModel
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def append_features(klass)
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super
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return if klass.instance_of?(Module)
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DublinCoreModel::ELEMENT_NAME_INFOS.each do |name, plural_name|
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plural = plural_name || "#{name}s"
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full_name = "#{DC_PREFIX}_#{name}"
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full_plural_name = "#{DC_PREFIX}_#{plural}"
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klass_name = "DublinCore#{Utils.to_class_name(name)}"
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klass.module_eval(<<-EOC, *get_file_and_line_from_caller(0))
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install_have_children_element(#{full_name.dump},
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#{full_plural_name.dump})
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remove_method :#{full_name}
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remove_method :#{full_name}=
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remove_method :set_#{full_name}
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def #{full_name}
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@#{full_name}.first and @#{full_name}.first.value
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end
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def #{full_name}=(new_value)
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@#{full_name}[0] = Utils.new_with_value_if_need(#{klass_name}, new_value)
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end
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alias set_#{full_name} #{full_name}=
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EOC
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end
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klass.module_eval(<<-EOC, *get_file_and_line_from_caller(0))
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alias date #{DC_PREFIX}_date
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alias date= #{DC_PREFIX}_date=
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EOC
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end
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end
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module DublinCoreModel
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extend BaseModel
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extend BaseDublinCoreModel
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TEXT_ELEMENTS = {
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"title" => nil,
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"description" => nil,
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"creator" => nil,
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"subject" => nil,
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"publisher" => nil,
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"contributor" => nil,
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"type" => nil,
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"format" => nil,
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"identifier" => nil,
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"source" => nil,
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"language" => nil,
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"relation" => nil,
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"coverage" => nil,
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"rights" => "rightses" # FIXME
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}
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DATE_ELEMENTS = {
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"date" => "w3cdtf",
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}
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ELEMENT_NAME_INFOS = DublinCoreModel::TEXT_ELEMENTS.to_a
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DublinCoreModel::DATE_ELEMENTS.each do |name, |
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ELEMENT_NAME_INFOS << [name, nil]
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end
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ELEMENTS = TEXT_ELEMENTS.keys + DATE_ELEMENTS.keys
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ELEMENTS.each do |name, plural_name|
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module_eval(<<-EOC, *get_file_and_line_from_caller(0))
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class DublinCore#{Utils.to_class_name(name)} < Element
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include RSS10
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content_setup
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class << self
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def required_prefix
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DC_PREFIX
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end
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def required_uri
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DC_URI
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end
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end
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@tag_name = #{name.dump}
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alias_method(:value, :content)
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alias_method(:value=, :content=)
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def initialize(content=nil)
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super()
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self.content = content
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end
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def full_name
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tag_name_with_prefix(DC_PREFIX)
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end
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def maker_target(target)
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target.new_#{name}
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end
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def setup_maker_attributes(#{name})
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#{name}.content = content
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end
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end
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EOC
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end
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DATE_ELEMENTS.each do |name, type|
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module_eval(<<-EOC, *get_file_and_line_from_caller(0))
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class DublinCore#{Utils.to_class_name(name)} < Element
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remove_method(:content=)
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remove_method(:value=)
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date_writer("content", #{type.dump}, #{name.dump})
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alias_method(:value=, :content=)
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end
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EOC
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end
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def dc_validate(tags)
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tags.each do |tag|
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key = "#{DC_PREFIX}_#{tag}"
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unless DublinCoreModel::ELEMENTS.include?(key)
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raise UnknownTagError.new(tag, DC_URI)
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end
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end
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end
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end
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# For backward compatibility
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DublincoreModel = DublinCoreModel
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class RDF
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class Channel; include DublinCoreModel; end
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class Image; include DublinCoreModel; end
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class Item; include DublinCoreModel; end
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class Textinput; include DublinCoreModel; end
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end
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DublinCoreModel::ELEMENTS.each do |name|
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class_name = Utils.to_class_name(name)
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BaseListener.install_class_name(DC_URI, name, "DublinCore#{class_name}")
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end
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DublinCoreModel::ELEMENTS.collect! {|name| "#{DC_PREFIX}_#{name}"}
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end
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