# unpack maintenance
# Reader - ADIwg JSON to internal data structure

# History:
#  Stan Smith 2018-02-19 refactored error and warning messaging
#  Stan Smith 2016-10-23 original script

require_relative 'module_date'
require_relative 'module_responsibleParty'
require_relative 'module_scope'

module ADIWG
   module Mdtranslator
      module Readers
         module MdJson

            module Maintenance

               def self.unpack(hMaint, responseObj)

                  # return nil object if input is empty
                  if hMaint.empty?
                     responseObj[:readerExecutionMessages] << 'WARNING: mdJson reader: resource maintenance object is empty'
                     return nil
                  end

                  # instance classes needed in script
                  intMetadataClass = InternalMetadata.new
                  intMaint = intMetadataClass.newMaintenance

                  # maintenance - frequency (required)
                  if hMaint.has_key?('frequency')
                     intMaint[:frequency] = hMaint['frequency']
                  end
                  if intMaint[:frequency].nil? || intMaint[:frequency] == ''
                     responseObj[:readerExecutionMessages] << 'ERROR: mdJson reader: resource maintenance frequency is missing'
                     responseObj[:readerExecutionPass] = false
                     return nil
                  end

                  # maintenance - date []
                  if hMaint.has_key?('date')
                     aItems = hMaint['date']
                     aItems.each do |item|
                        hReturn = Date.unpack(item, responseObj)
                        unless hReturn.nil?
                           intMaint[:dates] << hReturn
                        end
                     end
                  end

                  # maintenance - scope []
                  if hMaint.has_key?('scope')
                     aItems = hMaint['scope']
                     aItems.each do |item|
                        hReturn = Scope.unpack(item, responseObj)
                        unless hReturn.nil?
                           intMaint[:scopes] << hReturn
                        end
                     end
                  end

                  # maintenance - note []
                  if hMaint.has_key?('note')
                     hMaint['note'].each do |item|
                        if item != ''
                           intMaint[:notes] << item
                        end
                     end
                  end

                  # maintenance - contact []
                  if hMaint.has_key?('contact')
                     aItems = hMaint['contact']
                     aItems.each do |item|
                        hReturn = ResponsibleParty.unpack(item, responseObj)
                        unless hReturn.nil?
                           intMaint[:contacts] << hReturn
                        end
                     end
                  end

                  return intMaint

               end

            end

         end
      end
   end
end