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Contents
# frozen_string_literal: true
require "active_support/concern"
module Renalware
module PdfCompilation
extend ActiveSupport::Concern
def combine_multiple_pdfs_into_file(filepath:, glob:)
filepath = Pathname(filepath)
Rails.logger.info " Compiling PDFs #{glob.join(',')} into #{filepath}"
shell_to_ghostscript_to_combine_files(glob, dir, filepath)
filepath
end
def combine_multiple_pdfs_using_filenames(filenames, dir, output_filepath)
filenames = Array(filenames)
Rails.logger.info " Compiling PDFs #{filenames.join(',')} into #{output_filepath}"
using_a_temporary_output_file do |tmp_outfile|
shell_to_ghostscript_to_combine_files(filenames, dir, tmp_outfile)
move_tempfile_to_output_file(tmp_outfile, output_filepath)
end
end
# rubocop:disable Metrics/LineLength
def shell_to_ghostscript_to_combine_files(filenames, dir, outputfile)
outputfile = Pathname(outputfile)
cmd = "gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=#{outputfile} -dBATCH #{filenames.join(' ')}"
err = msg = nil
Open3.popen3(cmd, chdir: dir.to_s) do |_stdin, stdout, stderr|
err = stderr.read
msg = stdout.read
end
if err.present?
raise "Error combining PDFs: #{[err, msg].join(' ')} command: #{cmd}"
end
end
# rubocop:enable Metrics/LineLength
def move_tempfile_to_output_file(tmp_outfile, output_file)
FileUtils.mv tmp_outfile.path, output_file
output_file
end
def rails_tmp_folder
Rails.root.join("tmp").to_s
end
# Create a tempfile outside the temp dir as dir will be destroyed when outside block closes.
def using_a_temporary_output_file
file = Tempfile.new("pdf_combined", rails_tmp_folder)
begin
yield file
ensure
file.close
file.unlink # deletes the temp file
end
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems