Class: DerivativeRodeo::Services::PdfSplitter::Base Abstract

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/derivative_rodeo/services/pdf_splitter/base.rb

Overview

This class is abstract.

The purpose of this class is to split the PDF into constituent image files.

See Also:

Direct Known Subclasses

JpgPage, PngPage, TiffPage

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path, image_file_basename_template:, pdf_pages_summary: PagesSummary.extract_from(path: path)) ⇒ Base

Returns a new instance of Base.



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# File 'lib/derivative_rodeo/services/pdf_splitter/base.rb', line 50

def initialize(path,
               image_file_basename_template:,
               pdf_pages_summary: PagesSummary.extract_from(path: path))
  @pdfpath = path
  @pdf_pages_summary = pdf_pages_summary
  @ghost_script_output_file_template = File.join(File.dirname(path), image_file_basename_template)

  # We need to ensure that this temporary directory exists so we can write the files to it.
  # Fortunately, because this file space must be "local" tmp dir, we don't need to work
  # through any of the location antics of {StorageLocations::BaseLocation}.
  FileUtils.mkdir_p(File.dirname(@ghost_script_output_file_template))
end

Instance Attribute Details

#ghost_script_output_file_template ⇒ Object (readonly)

Returns the value of attribute ghost_script_output_file_template.



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# File 'lib/derivative_rodeo/services/pdf_splitter/base.rb', line 63

def ghost_script_output_file_template
  @ghost_script_output_file_template
end

Instance Method Details

#each {|the| ... } ⇒ Object

Yield Parameters:

  • the (String) —

    path to the page’s tiff.



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# File 'lib/derivative_rodeo/services/pdf_splitter/base.rb', line 74

def each(&block)
  entries.each(&block)
end

#gsdevice ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Raises:

  • (NotImplementedError) 


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# File 'lib/derivative_rodeo/services/pdf_splitter/base.rb', line 87

def gsdevice
  return self.class.gsdevice if self.class.gsdevice

  raise NotImplementedError, "#{self.class}#gsdevice"
end

#invalid_pdf? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 


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# File 'lib/derivative_rodeo/services/pdf_splitter/base.rb', line 79

def invalid_pdf?
  !pdf_pages_summary.valid?
end