Ruby-PDF generation

    def generate(forms)

        #clean_batch
        form_count = 0
        forms.each do |form|

            params_list = Array.new

            form.submission_answers.each do |sub_ans|
                params_list.append(Shellwords.escape(sub_ans.response))
            end
            params_list.append("temp_pdf_#{form_count}")
            params_string = params_list.join(" ")
            if form.doc_type == 'ATC'
                fork do
                    exec("python3 ./app/pdf-generators/generate_atc.py #{params_string}")
                end
            elsif form.doc_type == 'CRF'
                fork do
                    exec("python3 ./app/pdf-generators/generate_crf.py #{params_string}")
                end
            else # CCP
                fork do
                    exec("python3 ./app/pdf-generators/generate_ccp.py #{params_string}")
                end
            end
            form_count += 1
        end
        form_count.times do |i|
            puts "Waiting for temp_pdf_#{i} to finish generating..."
            while !File.file?("./db/generated_forms/temp_pdf_#{i}.pdf") do
            end
            puts "temp_pdf_#{i} now exists in the filesystem. Awesome"
        end

        fork do
            exec("python3 ./app/pdf-generators/pdf_merger.py")
        end

        puts "Waiting for the batch file to finish generating..."
        while !File.file?("./db/generated_forms/batch.pdf") do
        end
        puts "Batch file generated"
        form_count.times do |i|
            fork do
                exec("rm ./db/generated_forms/temp_pdf_#{i}.pdf")
            end
        end
        return form_count
    end