Code exemple for merge PDFS

[matheuscamarques]

could you implement something like this here

defmodule PdfMerger.MergePdfs do
  def method(input_files, output_file) do
    if pdftk_installed?() do
      merge_pdfs(input_files, output_file)
    else
      IO.puts("Error: pdftk is not installed.")
    end
  end

  defp command_exists?(command) do
    System.cmd("which", [command]) == {"/usr/bin/#{command}\n", 0}
  end

  defp pdftk_installed? do
    command_exists?("pdftk")
  end

  defp merge_pdfs(input_files, output_file) do
    input_files_string = Enum.join(input_files, " ")
    output_file = Path.expand(output_file)

    {output, status} =
      System.cmd("pdftk", ["#{input_files_string}", "cat", "output", "#{output_file}"])
      IO.inspect("pdftk #{input_files_string} cat output #{output_file}")
    case status do
      0 ->
        IO.puts("PDFs merged successfully.")

      _ ->
        IO.puts("Error: PDF merging failed.")
    end
  end
end