Class: Paperclip::PdfMerge

Inherits:
Processor
  • Object
show all
Defined in:
lib/paperclip_processors/pdf_merge.rb

Instance Method Summary collapse

Constructor Details

#initialize(file, options = {}, attachment = nil) ⇒ PdfMerge

Returns a new instance of PdfMerge.



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# File 'lib/paperclip_processors/pdf_merge.rb', line 29

def initialize file, options = {}, attachment = nil
  super
  @format = File.extname(@file.path)
  @basename = File.basename(@file.path, @format)
  @files = attachment.instance.pdf_files
end

Instance Method Details

#make ⇒ Object 



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# File 'lib/paperclip_processors/pdf_merge.rb', line 36

def make
  src = @file
  if @current_format && @current_format.downcase == '.pdf'
    dst = Tempfile.new([@basename, @format])
    dst.binmode

    file_paths = @files.map {|file| "#{Rails.root}/tmp/#{file.original_filename}"}

    all_page_file_paths = ""

    file_paths.each do |file_path|
      pdf = PDF::Reader.new(file_path)
      count = pdf.page_count
      counter = 0

      count.times do
        all_page_file_paths += "#{file_path}[#{counter}] "
        counter += 1
      end
    end

     Paperclip.run(
       'convert',
       "-density 150 #{all_page_file_paths} #{File.expand_path(dst.path)}"
      )

    return dst
  else
    return src
  end
end