#!/usr/bin/python2.5
"""
Copyright (C) 2008 Norman Messtorff <normes@normes.org>

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
"""

import time
import urllib
import bz2
from Configuration import Configuration


class Download(Configuration):
	"""Class with methodes to download files via http"""
	# TODO: autom. trying to download .bz2, gzip and at least plain...
	def __init__(self):
		self.debug(4, "Class Download initialized")
	
	
	def get_packages(self, destination, release, component, arch):
		"""Download and decompress Packages file from a given Debian mirror
		 - source: HTTP URL on Debian mirror
		- destination: the destination filename"""
		  
		# TODO: Doing some _nice_ and HTTP compatible stuff
		# TODO: release? arch? ubuntu? other distri?
		# TODO: Download Release file
		# TODO: check GPG signature
		self.debug(3, "Downloading Packages...")
		url=self.config["compare"]["packages_url"]
		packages = urllib.urlopen( url + "dists/" + release + "/" + component + "/binary-" + arch + "/Packages.bz2").read()
		
		try:
			self.debug(3,  "Decompressing...")
			self.debug(4, "Open file(w): " + destination)
			f=file(destination, 'w')
			f.write(bz2.decompress(packages))
			f.close()
		except:
			self.debug(1, "Could not Open file: " + destination)
			return 1
		
		self.debug(3, "Packages saved.")
		return 0