fetch_pdf_from_gmail.rb

require 'gmail'
require 'date'

def fetch_attachmets(id, pass, label_name, from_date)
  dir_name = "#{Dir.pwd}/#{Date.today}"
  Dir.mkdir(dir_name) unless File.exists?(dir_name)
  begin
    Gmail.connect(id, pass) do |gmail|
      puts gmail.logged_in? ? "login OK" : "NOT Logged in!!!!"
      puts "Checking mails after #{from_date}..."

      emails = gmail.label(label_name).find(:after => from_date)
      puts "found #{emails.count.to_i} mails in label '#{label_name}'"

      emails.each do |email|
        if !email.message.attachments.empty?
          puts email.subject
          email.message.attachments.each do |f|
            File.write(File.join(dir_name, f.filename), f.body.decoded)
          end
          # email.label!("downloaded")
        end
      end
    end
  rescue => e
    puts "ERROR DETH!!!! (#{e.message}, #{e.backtrace})"
  end
  puts "DONE!!!"
end

def prompt_login
  id = "**email**"
  pass = "**pass**"
  label_name = "**label name**"

  # puts "Enter your email address"
  # # id = gets.chomp

  # puts "Enter password"
  # # pass = gets.chomp

  # puts "label name?"
  # # label_name = gets.chomp

  puts "How many days from today? (HANKAKU SUJI de PLS)"
  duration = gets.chomp
  from_date = Date.today - (duration.to_i)

  fetch_attachmets(id, pass, label_name, from_date)
end

prompt_login