file_organizer.rb

#!/usr/bin/env ruby
#
# file_organizer.rb
# (http://gist.github.com/16180)
#
# By M@ McCray -- www.mattmccray.com (matt at elucidata dot net)
#
# Usage:
#
#   organize_files_within( target_folder )
#
#  For example, I created a script (that runs daily) that looks like this:
#
#     organize_downloads.rb:
#
#     #!/usr/bin/env ruby
#     downloads_folder = "/Users/darthapo/Downloads"
#     require File.join(File.dirname(__FILE__), 'file_organizer.rb')
#     organize_files_within(downloads_folder)
#
#  Also, one for any random folder:
#
#      organize_folder_by_type.rb:
#
#      #!/usr/bin/env ruby
#      unless ARGV.size == 1
#        puts "Usage: $0 folder"
#        exit(1)
#      end
#      require File.join(File.dirname(__FILE__), 'file_organizer.rb')
#      folder = ARGV[0] 
#      organize_files_within(folder)
#

EXTENSIONS_FOR_TYPE = {
  "Applications" => %w(.app .jar .exe .pkg .mpkg .air),
  "Archives"    => %w(.dmg .zip .rar .sit .sitx .tar .gz .bz2),
  "Audio"       => %w(.wav .mp3 .ogg .m3u .m4a .wma),
  "Code"        => %w(.sh .rb .js .java .c .m .h .py .php .css .haml .sass .erb .html .rhtml .xhtml .htm  .bat .patch .diff .gem .xul .shy .sql .nib .xib .cib .j .sj .nu .rake .thor .nuke .mxml),
  "Comics"      => %w(.cbr .cbz),
  "Data"        => %w(.xml .yaml .yml .json .sqlite .sqlite3 .db .csv .opml),
  "Documents"   => %w(.pdf .doc .ppt .txt .text .rtf .rtfd .xls .oo3 .tables .taskpaper .textile .markdown .graffle .pages .vpdoc),
  "Folders"     => [],
  "Fonts"       => %w(.ttf .otf .suit),
  "Links"       => %w(.webloc),
  "Images"      => %w(.jpg .jpe .jpeg .png .gif .bmp .svg .psd .ai .ps .ico .icns .lineform .eps .acorn .pxm .ptn .fla .tiff),
  "Models"      => %w(.3ds .blend .dxf .skp),
  "Other"       => [],
  "Scripts"     => %w(.script .celtx .scriv),
  "Torrents"    => %w(.torrent),
  "Videos"      => %w(.avi .mvk .mov .wmv .flv .mp4 .mpg .mpeg .m4v .qtz)
}

# The character to postfix any clashing filenames with...
FILE_POSTFIX = "_"

# =========================================================================================
# = No need to edit anything below this line                                              =
# =========================================================================================

require 'rubygems'
require 'rake'

def organize_files_within(folder)
  types_by_ext = {}

  # Create organizational folders, and invert Category/Extension hash
  EXTENSIONS_FOR_TYPE.each do |ftype, exts|
    folder_name = File.join(folder, ftype)
    exts.each do |ext|
      types_by_ext[ext.downcase] = folder_name
    end
  end

  FileList[folder + "/*"].each do |downloaded_file|
    file = File.expand_path(downloaded_file)

    # Skip our organization folders...
    next if File.directory?(file) && EXTENSIONS_FOR_TYPE.keys.include?( File.basename(file) )

    # Figure out our target folder...
    move_to = if types_by_ext.keys.include?( File.extname(file).downcase )
                types_by_ext[ File.extname(file).downcase ] # Folder by extension...
              elsif File.directory?(file)
                File.join(folder, "Folders") # Move folders into correct place...
              else
                File.join(folder, 'Other') # Otherwise, put in 'Other' folder...
              end

    # Create organizational folder, unless it already exists...
    FileUtils.mkdir( move_to, :verbose => true ) unless File.exists?( move_to )
  
    # Ensure the filename doesn't clash with an already organized file...
    file_ext  = File.extname(file)           # ie. ".js"
    file_base = File.basename(file)          # ie. "test.js"
    file_name = file_base.gsub(file_ext, '') # ie. "test"
    file_target = File.join(move_to, file_base)
  
    while File.exists?(file_target)
      file_name = "#{file_name}#{FILE_POSTFIX}"
      file_target = File.join(move_to, "#{file_name}#{file_ext}")
    end
  
    # Move the file...
    FileUtils.mv(file, file_target, :verbose => true)
  end

  puts "Done."
end