Class: Media::LibreOfficeTransmogrifier

Inherits:
Transmogrifier show all
Defined in:
lib/media/transmogrifiers/libreoffice.rb

Instance Attribute Summary

Attributes inherited from Transmogrifier

#command_output, #input, #input_file, #input_type, #options, #output, #output_file, #output_type

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Transmogrifier

add, command_available?, converts_from?, converts_to?, find_class, inherited, #initialize, input_map, list, output_map, #run_command, run_command

Constructor Details

This class inherits a constructor from Media::Transmogrifier

Class Method Details

.available? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/media/transmogrifiers/libreoffice.rb', line 55

def self.available?
  command_available?(LIBREOFFICE_COMMAND)
end

.input_types ⇒ Object 



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# File 'lib/media/transmogrifiers/libreoffice.rb', line 24

def self.input_types
  %w(
  text/plain text/html text/richtext application/rtf
  text/csv text/comma-separated-values
  application/msword application/mswrite application/powerpoint
  application/excel application/access application/vnd.ms-msword
  application/vnd.ms-mswrite application/vnd.ms-powerpoint
  application/vnd.ms-excel application/vnd.ms-access
  application/msword-template application/excel-template
  application/powerpoint-template
  application/vnd.oasis.opendocument.spreadsheet
  application/vnd.oasis.opendocument.formula
  application/vnd.oasis.opendocument.chart
  application/vnd.oasis.opendocument.image
  application/vnd.oasis.opendocument.graphics
  application/vnd.oasis.opendocument.presentation
  application/vnd.oasis.opendocument.text-web
  application/vnd.oasis.opendocument.text
  application/vnd.oasis.opendocument.text-template
  application/vnd.oasis.opendocument.text-master
  application/vnd.oasis.opendocument.presentation-template
  application/vnd.oasis.opendocument.graphics-template
  application/vnd.oasis.opendocument.spreadsheet-template
  application/vnd.openxmlformats-officedocument.wordprocessingml.document
  )
end

.output_types ⇒ Object 



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# File 'lib/media/transmogrifiers/libreoffice.rb', line 51

def self.output_types
  ["application/pdf"] + input_types
end

Instance Method Details

#run(&block) ⇒ Object 



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# File 'lib/media/transmogrifiers/libreoffice.rb', line 59

def run(&block)
  status = nil

  # make a unique temporary directory for output, so that the filename won't collide.
  Dir.mktmpdir do |work_directory|
    # run command
    ext = extension(output_type)
    if ext
      arguments = [
        LIBREOFFICE_COMMAND,
        '--headless',
        "-env:UserInstallation=file://#{work_directory}/home",
        '-convert-to', extension(output_type),
        '-outdir', work_directory,
        input_file
      ]
      status = run_command(*arguments, &block)

      # we cannot specify the name of the output file, so grab what it generated and move it to self.output_file
      libreoffice_output = work_directory + '/' + replace_extension(input_file, extension(output_type))
      if File.exist?(libreoffice_output)
        replace_file from: libreoffice_output, to: output_file
      else
        msg = ["Error: Could not find libreoffice output %s \n" % output_file]
        msg << arguments.join(' ')
        msg += Dir[work_directory + '/*']
        unless command_output.empty?
          msg << 'LibreOffice said:'
          msg << command_output
        end
        msg = msg.join("\n")
        error msg
        yield(msg) if block_given?
        return :failure
      end
    else
      yield('could not find extension for type %s' % output_type) if block_given?
      return :failure
    end
  end
  return status
end