Class: GBDev::PDF::Book

Inherits:
Object
  • Object
show all
Includes:
Utils::PrivateMethods
Defined in:
lib/pdf_filler/book.rb

Overview

A book that represents collection of PDF page.

Instance Method Summary collapse

Methods included from Utils::PrivateMethods

#build_random_file_name, #build_random_string

Constructor Details

#initialize ⇒ Book

Returns a new instance of Book.



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# File 'lib/pdf_filler/book.rb', line 8

def initialize()
  @pages = []
end

Instance Method Details

#add_page(new_page) ⇒ Object

Add a page to the book

  • new_page - The page object of type GBDev::PDF::Page



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# File 'lib/pdf_filler/book.rb', line 15

def add_page(new_page)
  @pages << new_page
end

#save_to(filename) ⇒ Object

Renders the PDF Book and saves it to the specified file.

  • filename - A path to the file to be created.



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# File 'lib/pdf_filler/book.rb', line 22

def save_to(filename)
  dir = File.dirname(filename)             
  temp_dir = [dir, "collection_temp_#{build_random_string}"].join('/')
  Dir.mkdir(temp_dir)
  @pages.each_with_index do |page, indx| 
    page.save_to([temp_dir, "#{indx}_#{build_random_file_name}"].join('/'))
  end
  temp_files = Dir[[temp_dir,'*'].join('/')].sort                 
      
  document = Document.new
  copier = PdfCopy.new(document, FileOutputStream.new(filename))

  document.open        
  temp_files.each do |read_target|
    reader = PdfReader.new(read_target)
    n_pages = reader.getNumberOfPages
    n_pages.times do |i|
      copier.addPage( copier.getImportedPage(reader, i+1)) if copier
    end
  end        
  document.close
        
  FileUtils.rm_rf(temp_dir, {:secure => true})        
end

#to_buffer ⇒ Object

Renders the template with the given data and returns that buffer.



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# File 'lib/pdf_filler/book.rb', line 48

def to_buffer
  dir = defined?(RAILS_ROOT) ? [RAILS_ROOT, 'tmp'].join('/') : File.expand_path(File.dirname(__FILE__) + '/../../spec/output')         
  temp_dir = [dir, "collection_temp_#{build_random_string}"].join('/')
  Dir.mkdir(temp_dir)
  @pages.each_with_index do |page, indx| 
    page.save_to([temp_dir, "#{indx}_#{build_random_file_name}"].join('/'))
  end
  temp_files = Dir[[temp_dir,'*'].join('/')].sort                 
      
  document = Document.new        
  baos = ByteArrayOutputStream.new
  copier = PdfCopy.new(document, baos)

  document.open        
  
  # This did not work but try working on it again later.
  # @pages.each do |page|
  #   bais = ByteArrayInputStream.new_with_sig(page.to_buffer)
  #   reader = PdfReader.new(bais)
  #   reader = page.get_pdf_reader
  #   n_pages = reader.getNumberOfPages
  #   n_pages.times do |i|
  #     copier.addPage( copier.getImportedPage(reader, i+1)) if copier
  #   end
  # end        
  
  temp_files.each do |read_target|
    reader = PdfReader.new(read_target)
    n_pages = reader.getNumberOfPages
    n_pages.times do |i|
      copier.addPage( copier.getImportedPage(reader, i+1)) if copier
    end
  end        
  document.close
        
  #FileUtils.rm_rf(temp_dir, {:secure => true})       
        
  return baos.toByteArray()
end