module Photoarchiver

# File lib/photoarchiver.rb, line 7
def self.organize(dir_src, dir_target)

  puts "Photoarchiver #{Photoarchiver::VERSION}"

  # Simply check to see if the source directory exists and complain if it does not
  if File.exists?(dir_src) && File.directory?(dir_src)
    # Source dir exists, go ahead and make target directory if it does not exist
    Dir.mkdir(dir_target) unless File.exists?(dir_target)
  else
    raise 'First argument, source directory, does not exist or is not a directory'
  end

  puts "Source Directory:  #{dir_src}"
  puts "Target Directory:  #{dir_target}"


  # Gather up all the potential photo files
  files = Dir.glob(File.join(dir_src, '**', '*')).reject { |temp| File.directory? temp }
  photos = files.grep(/\.JPG/i)

  # Loop through the photos, not currently using index but may in the future
  photos.each_with_index {|val, index|

    date_created = EXIFR::JPEG.new(val).exif.date_time_original || File.stat(val).ctime

    FileUtils::mkdir_p File.join(dir_target, date_created.strftime('%Y'), date_created.strftime('%Y-%m-%d'))
    target_file = File.join(dir_target, date_created.strftime('%Y'), date_created.strftime('%Y-%m-%d'), date_created.strftime('%Y%m%d-%H%M%S')) + '.jpg'
    puts "Moving #{val} to #{target_file}"
    File.rename(val, target_file)
  }
  puts 'Done processing photos'
end