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# -*- coding: utf-8 -*-
#
# File: plugins/new_version.py
# This file is part of the Portato-Project, a graphical portage-frontend.
#
# Copyright (C) 2008 René 'Necoro' Neumann
# This is free software.  You may redistribute copies of it under the terms of
# the GNU General Public License version 2.
# There is NO WARRANTY, to the extent permitted by law.
#
# Written by René 'Necoro' Neumann <necoro@necoro.net>

try:
	from bzrlib import plugin, branch
except ImportError:
	plugin = branch =  None
import gobject

from portato.helper import debug, warning
from portato import get_listener
from portato.constants import VERSION, APP_ICON, APP
from portato.gui.utils import GtkThread

class NewVersionFinder(Plugin):
	"""
	Checks for a new version of portato every 30 minutes and on startup.
	"""
	__author__ = "René 'Necoro' Neumann"
	__dependency__ = ["dev-util/bzr"]

	def init (self):
		self.add_call("main", self.run)
		self.add_menu("Check for new _versions", self.menu)

	def find_version (self, rev):
		try:
			b = branch.Branch.open("lp:portato")
		except Exception, e:
			warning("NEW_VERSION :: Exception occured while accessing the remote branch: %s", str(e))
			return

		debug("NEW_VERSION :: Installed rev: %s - Current rev: %s", rev, b.revno())
		if int(rev) < int(b.revno()):
			def callback():
				get_listener().send_notify(base = "New Portato Live Version Found", descr = "You have rev. %s, but the most recent revision is %s." % (rev, b.revno()), icon = APP_ICON)
				return False
			
			gobject.idle_add(callback)

	def start_thread(self, rev):
		t = GtkThread(target = self.find_version, name = "Version Updater Thread", args = (rev,))
		t.setDaemon(True)
		t.start()
		return True

	def menu (self, *args, **kwargs):
		"""
		Run the thread once.
		"""
		v = VERSION.split()
		if len(v) != 3 or v[0] != "9999":
			return None

		rev = v[-1]

		plugin.load_plugins() # to have lp: addresses parsed
		
		self.start_thread(rev)
		return rev

	def run (self, *args, **kwargs):
		"""
		Run the thread once and add a 30 minutes timer.
		"""
		rev = self.menu()

		if rev is not None:
			gobject.timeout_add(30*60*1000, self.start_thread, rev) # call it every 30 minutes

register(NewVersionFinder, (branch is None))