__author__="Andrew Pennebaker (andrew.pennebaker@gmail.com)"
__date__="11 Jul 2006 - 24 Oct 2006"
__copyright__="Copyright 2006 Andrew Pennebaker"
__license__="GPL"
__URL__="http://snippets.dzone.com/posts/show/2890"

import time, os, socket

import downloader
from Adler32 import Adler32

PAGE_URL="http://www.mozilla.com"
SEARCH_STRING="irefox 2"
BROWSER="firefox"
MEDIA_PLAYER="winamp"
SONG="song 2.ogg"
SOFTWARE_URL="http://www.mozilla.com/products/download.html?product=firefox-2.0&os=win&lang=en-US"

def message(text=""):
	print "[%s] %s" % (time.asctime(), text)

def main():
	global PAGE_URL
	global SEARCH_STRING
	global BROWSER
	global MEDIA_PLAYER
	global SONG
	global SOFTWARE_URL

	hasUpdated=False
	includesFF2=False
	firstHash=None
	currentHash=firstHash

	hasher=Adler32()

	while (not hasUpdated) or (not includesFF2):
		time.sleep(1) # seconds

		try:
			message("checking page")

			down=downloader.createDownload(PAGE_URL)
			instream=down[0]
			outstream=open(os.getcwd()+os.sep+down[1], "wb")

			line=instream.readline()
			includesFF2=False
			while line!="":
				if SEARCH_STRING in line:
					includesFF2=True
				hasher.update(line)
				outstream.write(line)
				line=instream.readline()
			instream.close()
			outstream.close()

			if firstHash==None:
				currentHash=firstHash=hasher.formatDigest()
				message("first hash: "+firstHash)
			else:
				currentHash=hasher.formatDigest()

			hasher.reset()

			if not includesFF2:
				message("proxy page")
			else:
				hasUpdated=(firstHash!=currentHash)
				if not hasUpdated:
					message("static")
		except IOError, e:
			message("connection error")
		except Exception, e:
			message(e)

	message("detected update")
	message("alerting")

	os.popen("start "+BROWSER+" "+PAGE_URL)
	os.popen("start "+MEDIA_PLAYER+" \""+os.getcwd()+os.sep+SONG+"\"")

	message("alerted")
	message("downloading")

	try:
		down=downloader.createDownload(SOFTWARE_URL)
		instream=down[0]
		outstream=open(os.getcwd()+os.sep+down[1], "wb")
		downloader.download(instream, outstream)

		message("downloaded")
	except:
		message("could not download")

	message("done")

if __name__=="__main__":
	main()