#!/usr/bin/env ruby

# == Flikr Downloader
#
# flikr_downloader
#
# Download the set of photos from a specified Flikr page
# This currently has very little error checking so be careful
#
# No file existance checking is done, each download starts at image_1.jpg and counts up
# any existing images will be overwritten
#
# == Usage
#
# flikr_download.rb URL
#
# URL: The page of images to download
#
# Author:: Robin Wood (dninja@gmail.com)
# Copyright:: Copyright (c) Robin Wood 2009
# Licence:: GPL
#
require 'net/http'

url=ARGV.shift

if url =~ /http:\/\/([^\/]*)(\/.*)/
	base=$1
	page=$2
else
	puts "Couldn't parse the url\n"
	exit
end

image_number = 1

Net::HTTP.start(base) { |http|
	resp=http.get(url)
	#puts resp
	resp.body.each { |line|
		if line =~ /.*src="http:\/\/([^\/]*)(.*)_m\.jpg.*/
			#o.puts("wget "+$1+".jpg")
			img_base=$1
			img_page=$2+".jpg"
			output_file="image_"+image_number.to_s()+".jpg"

			puts "Getting "+img_base+img_page+" to "+output_file
			Net::HTTP.start(img_base) { |img_http|
				img_resp=img_http.get(img_page)
				open(output_file, "wb") { |file|
					file.write(img_resp.body)
				}
			}
			image_number+=1
		end
	}
}