Class: Renalware::Letters::Printing::CreatePdfByInterleavingAddressSheetAndLetterForEachRecipient::UsingSeparatePdfForEachLetterSection

Inherits:
Object
  • Object
show all
Includes:
PdfCombining
Defined in:
app/models/renalware/letters/printing/create_pdf_by_interleaving_address_sheet_and_letter_for_each_recipient.rb

Overview

This approach generates a PDF for each address cover sheet and each letter. It shells to ghostscript to merge the PDFs together in the right order.

Pros:

  • uses the letter PDF already in the cache from when we rendered it to deduce the page count after the letter was archived

  • uses very little memory as PDF concatenation done on disk

  • concatentation itslef reasonable fast

Cons:

  • slow because it shells to wkhtmltopdf for each cover sheet, and these are unklikely to be found in tha cache. So for main recip and 2 CCs it wil call wkhtmltopdf 3 times to render the address cover sheets, and the letter PDF should be pulled from cache so that is quick at least.

Instance Method Summary collapse

Methods included from PdfCombining

#combine_multiple_pdfs_into_one, #copy_tempfile_to_output_file, #files, #in_a_temporary_folder, #rails_tmp_folder, #shell_to_ghostscript_to_combine_files_into, #using_a_temporary_output_file

Instance Method Details

#call ⇒ Object 



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# File 'app/models/renalware/letters/printing/create_pdf_by_interleaving_address_sheet_and_letter_for_each_recipient.rb', line 107

def call
  in_a_temporary_folder do |dir|
    Array(letters).each do |letter|
      letter_filename = create_letter_pdf_in(dir, letter)
      PrintableRecipients.for(letter).each do |recipient|
        files << create_cover_sheet_for(recipient, letter, dir)
        files << letter_filename
      end
    end
    combine_multiple_pdfs_into_one(dir, output_file)
  end
end