#! /usr/bin/ruby -w
# == Synopsis
# Ruby script to set x backgrop to NASA image of the day
#
# == Author
# Matt Foster <mattfoster@clara.co.uk>
#
# == Copyright
# Copyright (c) 2006 Matt Foster
# Licensed under the same terms as Ruby.

require 'rss/2.0'
require 'rss/1.0'
require 'rss/image'
require 'open-uri'
require 'rdoc/usage'

URL    = 'http://www.nasa.gov/rss/lg_image_of_the_day.rss'
PREFIX = File.expand_path('~/stuff/backdrops')
DESAT  = true

#bkg_cmd = 'gconftool -t str -s /desktop/gnome/background/picture_filename'
bkg_cmd = 'feh --bg-scale'

if __FILE__ == $0

  if ARGV.length != 0
    RDoc::usage
    exit
  end
  
  open(URL) do |http|
    response = http.read
    result = RSS::Parser.parse(response)
    # Parse image url from feed
    im_uri = result.image.url
    image = open(im_uri).read

    im_name = File.join(PREFIX, File.basename(im_uri))
    file = File.new(im_name, 'w')
    file.write(image)

    # Desaturate?
    system("mogrify -modulate 100,20 -resize 1280x1024 #{im_name}") if DESAT