File renaming action for Dropzone 3

image_archive_action.rb

# Dropzone Action Info
# Name: Archive Image
# Description: Save imge to specified forder, and rename it to YYYYMMDD format.
# Handles: Files
# Creator: Alex Musayev
# URL: http://yoursite.com
# Events: Dragged
# KeyModifiers: Command, Option, Control, Shift
# SkipConfig: No
# RunsSandboxed: Yes
# Version: 1.0
# MinDropzoneVersion: 3.0

require 'fileutils'

DEFAULT_ARCHIVE_DIR = '/Users/dreikanter/Dropbox/Images/'

def dragged
  archive_dir = File.expand_path(ENV.fetch('IMAGE_ARCHIVE_DIR', DEFAULT_ARCHIVE_DIR))
  FileUtils.mkdir_p(archive_dir) unless File.directory? archive_dir
  output = []

  $items.each do |source_file|
    timestamp = File.ctime(source_file).strftime('%Y%m%d-%H%M')
    ext = File.extname(source_file).downcase
    file_name = File.join(archive_dir, "#{timestamp}#{ext}")
    number = 0

    while File.exist? file_name do
      number += 1
      file_name = File.join(archive_dir, "#{timestamp}-#{number}#{ext}")
    end

    FileUtils.mv(source_file, file_name)

    output << file_name
  end
    
  $dz.finish(output.join("\n"))
  $dz.url(false)
end
 
def clicked
  $dz.url(false)
end