Class: Libis::Format::PdfToPdfa

Inherits:
Object
  • Object
show all
Includes:
Tools::Logger
Defined in:
lib/libis/format/pdf_to_pdfa.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.run(source, target = nil, options = {}) ⇒ Object 



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# File 'lib/libis/format/pdf_to_pdfa.rb', line 17

def self.run(source, target = nil, options = {})
  self.new.run source, target, options
end

Instance Method Details

#run(source, target = nil, options = nil) ⇒ Object 



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# File 'lib/libis/format/pdf_to_pdfa.rb', line 21

def run(source, target = nil, options = nil)

  target ||= File.join(Dir.tmpdir, Dir::Tmpname.make_tmpname([File.basename(source, '.*'), '.pdf']))

  data_dir = File.absolute_path(File.join(File.dirname(__FILE__), '..', '..', '..', 'data'))

  icc_info = icc_options(options[:colorspace])

  icc_file = File.join(Dir.tmpdir, "#{icc_info[:icc_name]}#{Random.new.bytes(12).unpack('H*').first}.icc")
  FileUtils.cp(File.join(data_dir, "#{icc_info[:icc_name]}.icc"), icc_file)

  def_filename = File.join(Dir.tmpdir, "PDFA_def_#{Random.new.bytes(12).unpack('H*').first}.ps")
  File.open(def_filename, 'w') do |f|
    f.puts File.read(File.join(Libis::Format::DATA_DIR, 'PDFA_def.ps')).
               gsub('[** Fill in ICC profile location **]', icc_file).
               gsub('[** Fill in ICC reference name **]', icc_info[:icc_ref])
  end

  result = Libis::Tools::Command.run(
      Libis::Format::Config[:ghostscript_path],
      '-dBATCH', '-dNOPAUSE', '-dNOOUTERSAVE',
      '-sColorConversionStrategy=/UseDeviceIndependentColor',
      "-sProcessColorModel=#{icc_info[:device]}",
      '-sDEVICE=pdfwrite', '-dPDFA', '-dPDFACompatibilityPolicy=1',
      "-sOutputICCProfile=#{icc_file}",
      '-o', File.absolute_path(target),
      def_filename,
      source
  )

  FileUtils.rm [icc_file, def_filename].compact, force: true

  unless PdfaValidator.run(target)
    result[:status] = -999
    result[:err] << 'Failed to validate generated PDF/A file.'
  end

  result
end