pulibrary / tigerdata-app / af16f079-955d-4d7a-a6b5-9dad5da9522e

# :nocov:

require "nokogiri"

namespace :xml_schema do

  desc "Validates the example XML provided by Matt against the TigerData XSD"

  task validate_example: :environment do

    # Files downloaded from https://github.com/pulibrary/tigerdata-app/issues/896

    schema_file = "./lib/assets/TigerData_StandardMetadataSchema_v0.7_2024-08-27.xsd"

    document_file = "./lib/assets/TigerData_MetadataExample-Project_2024-08-27.xml"

    xsd = File.read(schema_file)

    xsd = use_local_xml_xsd(xsd)

    # Validate the sample XML file against the schema

    # https://www.tutorialspoint.com/xsd/xsd_syntax.htm

    # https://nokogiri.org/rdoc/Nokogiri/XML/Schema.html

    xsd = Nokogiri::XML::Schema(xsd)

    doc = Nokogiri::XML(File.read(document_file))

    errors = xsd.validate(doc)

    if errors.count == 0

      puts "OK"

    else

      errors.each do |error|

        puts error.message

      end

    end

  end

  # Replace the reference to `xml.xsd` from the xsd with a reference to our

  # local copy of the file, otherwise the validation tends to fail because

  # Nokogiri cannot load the original `xml.xsd` file from the W3C

  # source. ¯\_(ツ)_/¯

  # For more information see: https://stackoverflow.com/a/18527198/446681

  def use_local_xml_xsd(xsd)

    local_xml_xsd = Pathname.new("./lib/assets/xml.xsd").realpath.to_s

    xsd.sub!("https://www.w3.org/2001/xml.xsd", "file://#{local_xml_xsd}")

  end

end