draft script for mass exif (and filename) time update: change year

change_exif_and_filename_year_to_2020.rb

require "time"

Dir.new(".").each do |f|
  next unless f =~ /jpg/i

  command = "exiftool -T -createdate '#{f}'"
  puts command

  result = `#{command}`
  time_string = "#{result}"

  time_string[4] = "-"
  time_string[7] = "-"

  time = Time.parse(time_string)

  puts "parsed #{time}"

  if time.year < 2020
    new_time = Time.new(
      2020,
      time.month,
      time.day,
      time.hour,
      time.min,
      time.sec
    )

    puts "new time #{new_time}"

    update_command = "exiftool -AllDates='#{new_time.year}:#{new_time.month}:#{new_time.day} #{new_time.hour}:#{new_time.min}:#{new_time.sec}' '#{f}'"

    puts update_command
    `#{update_command}`
  end

  unless f =~ /2020.+/i
    puts "need to update filename"

    new_filename = f.clone
    new_filename[2] = '2'
    new_filename[3] = '0'

    rename_command = "mv '#{f}' '#{new_filename}'"

    puts rename_command
    `#{rename_command}`
  end

end