Move the newest screen grab (png file) from the desktop to Dropbox (LaunchBar action)

gistfile1.txt

#! /usr/bin/ruby

require "pathname"
require "fileutils"
require "uri"

def large_type(string)
  msg = URI.encode(string)
  system "open x-launchbar:large-type?string=#{msg}"
end

SRC_DIR = File.expand_path "~/Desktop"
DST_DIR = Pathname.new "~/Dropbox/Public/pic"
PUBLISH = "http://dl.dropbox.com/u/4381416/pic"

dst_name = Time.now.to_i.to_s(16).concat(".png")

Dir.chdir SRC_DIR do
  pngs = Dir.glob("*.png").sort_by { |file| File.ctime(file) }
  
  if pngs.empty?
    large_type("No grabs available")
  else
    FileUtils.mv pngs.last, DST_DIR.join(dst_name).expand_path
    IO.popen("pbpaste", "w") { |cb| cb << "#{PUBLISH}/#{dst_name}" }
    large_type("Pushed URL to clipboard")
  end
end