56 lines
1.2 KiB
Ruby
56 lines
1.2 KiB
Ruby
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require 'nokogiri'
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module AVM
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class XMP
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attr_reader :doc
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def initialize
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@doc = empty_xml_doc
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end
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def add_to_doc
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yield Hash[[ :dublin_core, :iptc ].collect { |key| [ key, send(key) ] }]
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end
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private
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def dublin_core
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at_rdf_description "Dublin Core"
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end
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def iptc
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at_rdf_description "IPTC"
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end
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def at_rdf_description(about)
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@doc.at_xpath(%{//rdf:Description[@about="#{about}"]})
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end
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def empty_xml_doc
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document = Nokogiri::XML(<<-XML)
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<x:xmpmeta xmlns:x="adobe:ns:meta/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
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<rdf:RDF>
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<rdf:Description about="Dublin Core">
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</rdf:Description>
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<rdf:Description about="IPTC">
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</rdf:Description>
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</rdf:RDF>
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</x:xmpmeta>
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XML
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{
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:dc => "http://purl.org/dc/elements/1.1/",
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:photoshop => "http://ns.adobe.com/photoshop/1.0/",
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:avm => "http://www.communicatingastronomy.org/avm/1.0/",
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:Iptc4xmpCore => "http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/"
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}.each do |namespace, url|
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document.root.add_namespace_definition(namespace.to_s, url)
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end
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document
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end
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end
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end
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