Recurse directory and count all pages in pdf files

page_count.rb

require 'rubygems'
require 'pdf/reader'

class TotalPages

  def count(dir)
    @conv_directory = dir
    ## I output the directory argument as a test with the below line -
    ## mostly to make sure that passing '.' gets current dir
    # puts @conv_directory
    recurse_and_count
  end

  def directory
    @conv_directory
  end

  def directory_tree
    Dir["#{directory}/**/*"]
  end

  def recurse_and_count
    total = 0
    directory_tree.each do |item|
      case File.stat(item).ftype
      when 'file'
        if File.extname(item).downcase == ".pdf"
          receiver = PageReceiver.new
          pdf = PDF::Reader.file(item, receiver, :pages => false)
          total += receiver.pages
        end rescue p item
      end
    end
    total
  end
end

# receiver = PageReceiver.new
# pdf = PDF::Reader.file("somefile.pdf", receiver, :pages => false)
class PageReceiver
  attr_accessor :pages
    
  # Called when page parsing ends
  def page_count(arg)
    @pages = arg
  end
end