# unpack citation
# Reader - ADIwg JSON V1 to internal data structure

# History:
# 	Stan Smith 2013-08-26 original script
#   Stan Smith 2014-04-25 modified to support json schema 0.3.0
#   Stan Smith 2014-07-03 resolve require statements using Mdtranslator.reader_module
#   Stan Smith 2014-08-18 changed additionalIdentifier section to identifier schema 0.6.0

require ADIWG::Mdtranslator.reader_module('module_dateTime', $response[:readerVersionUsed])
require ADIWG::Mdtranslator.reader_module('module_responsibleParty', $response[:readerVersionUsed])
require ADIWG::Mdtranslator.reader_module('module_onlineResource', $response[:readerVersionUsed])
require ADIWG::Mdtranslator.reader_module('module_resourceIdentifier', $response[:readerVersionUsed])

module Adiwg_Citation

	def self.unpack(hCitation)

		# instance classes needed in script
		intMetadataClass = InternalMetadata.new
		intCitation = intMetadataClass.newCitation

		# citation - title
		if hCitation.has_key?('title')
			s = hCitation['title']
			if s != ''
				intCitation[:citTitle] = s
			end
		end

		# citation - date
		if hCitation.has_key?('date')
			aCitDates = hCitation['date']
			unless aCitDates.empty?
				aCitDates.each do |hCitDate|
					if hCitDate.has_key?('date')
						s = hCitDate['date']
						if s != ''
							intDateTime = Adiwg_DateTime.unpack(s)
							if hCitDate.has_key?('dateType')
								s = hCitDate['dateType']
								if s != ''
									intDateTime[:dateType] = s
								end
							end
							intCitation[:citDate] << intDateTime
						end
					end
				end
			end
		end

		# citation - edition
		if hCitation.has_key?('edition')
			s = hCitation['edition']
			if s != ''
				intCitation[:citEdition]  = s
			end
		end

		# citation - responsible party
		if hCitation.has_key?('responsibleParty')
			aRParty = hCitation['responsibleParty']
			unless aRParty.empty?
				aRParty.each do |hRParty|
					intCitation[:citResponsibleParty] << Adiwg_ResponsibleParty.unpack(hRParty)
				end
			end
		end

		# citation - presentation form
		if hCitation.has_key?('presentationForm')
			aPForms = hCitation['presentationForm']
			unless aPForms.empty?
				aPForms.each do |pForm|
					intCitation[:citResourceForms] << pForm
				end
			end
		end

		# citation - resource identifiers
		if hCitation.has_key?('identifier')
			aResIds = hCitation['identifier']
			aResIds.each do |hIdentifier|
				unless hIdentifier.empty?
					intCitation[:citResourceIDs] << Adiwg_ResourceIdentifier.unpack(hIdentifier)
				end
			end
		end

		# citation - online resources
		if hCitation.has_key?('onlineResource')
			aOlRes = hCitation['onlineResource']
			aOlRes.each do |hOlRes|
				unless hOlRes.empty?
					intCitation[:citOlResources] << Adiwg_OnlineResource.unpack(hOlRes)
				end
			end
		end

		return intCitation
	end

end