Top Level Namespace

Defined Under Namespace

Classes: Images2pdfs

Instance Method Summary collapse

Instance Method Details

#convert(images_directory, pdfs_directory) ⇒ Object

Get images directory as argument from terminal



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# File 'lib/convert.rb', line 4

def convert images_directory , pdfs_directory

  # Get all files from that directory
  all_images = Dir.entries(images_directory)

  #Segregate only the required the question paper images , just in case the directory contains other files
  all_images.keep_if { |a| ((a.start_with? "mid-") || (a.start_with? "end-")) && ((a.end_with? ".jpg") || (a.end_with? ".png") || (a.end_with? ".tif") || (a.end_with? ".gif") || (a.end_with? ".svg") || (a.end_with? ".bmp"))}

  #Store number of images as a variable to show % finished
  number_of_images = all_images.count

  # Initialisation of variables like Array of names of papers , eg. mid-spring-2016-MA20104
  Dir.chdir(images_directory)
  papernames_array = []
  i = 0
  all_images = all_images.sort
  stack = Magick::ImageList.new

  #Loop through all paper images & batch merge them into PDFs , even if a paper has 3 pages / images
  all_images.each do |file|
    papernames_array[i] = file[0..22]
    if i == 0
      Dir.chdir(images_directory)
      stack = Magick::ImageList.new
      incoming = Magick::ImageList.new file
      stack.concat(incoming)
    else
      if papernames_array[i].eql? papernames_array[i-1]
        Dir.chdir(images_directory)
        incoming = Magick::ImageList.new file
        stack.concat(incoming)
      else
        Dir.chdir(pdfs_directory)
        stack.write(papernames_array[i-1]+".pdf")
        Dir.chdir(images_directory)
        stack = Magick::ImageList.new
        incoming = Magick::ImageList.new file
        stack.concat(incoming)
      end
      if i == number_of_images-1
        Dir.chdir(pdfs_directory)
        stack.write(papernames_array[i]+".pdf")
      end
    end
    i = i + 1
    percentage = (i.to_f/number_of_images.to_f) * 100
    puts "Processing #{i}/#{number_of_images} images , #{percentage}% done"
  end
end