# AlertWatcher.py
# -*- Mode: Python; indent-tabs-mode: nil; tab-width: 4; coding: utf-8 -*-
#
# Copyright (c) 2010 Mohamed Amine IL Idrissi
#
# Author: Mohamed Amine IL Idrissi <[email protected]>
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA

from __future__ import absolute_import

from gi.repository import GObject
import dbus
from dbus.mainloop.glib import DBusGMainLoop


class AlertWatcher(GObject.GObject):
""" a class that checks for alerts and reports them, like a battery
or network warning """

__gsignals__ = {"network-alert": (GObject.SignalFlags.RUN_FIRST,
None,
(GObject.TYPE_INT,)),
"battery-alert": (GObject.SignalFlags.RUN_FIRST,
None,
(GObject.TYPE_BOOLEAN,)),
"network-3g-alert": (GObject.SignalFlags.RUN_FIRST,
None,
(GObject.TYPE_BOOLEAN,
GObject.TYPE_BOOLEAN,)),
}

def __init__(self):
GObject.GObject.__init__(self)
DBusGMainLoop(set_as_default=True)
self.bus = dbus.Bus(dbus.Bus.TYPE_SYSTEM)
# make it always connected if NM isn't available
self.network_state = 3

def check_alert_state(self):
try:
obj = self.bus.get_object("org.freedesktop.NetworkManager",
"/org/freedesktop/NetworkManager")
obj.connect_to_signal(
"StateChanged",
self._on_network_state_changed,
dbus_interface="org.freedesktop.NetworkManager")
interface = dbus.Interface(obj, "org.freedesktop.DBus.Properties")
self.network_state = interface.Get(
"org.freedesktop.NetworkManager", "State")
self._network_alert(self.network_state)
# power
obj = self.bus.get_object('org.freedesktop.UPower',
'/org/freedesktop/UPower')
obj.connect_to_signal("Changed", self._power_changed,
dbus_interface="org.freedesktop.UPower")
self._power_changed()
# 3g
self._update_3g_state()
except dbus.exceptions.DBusException:
pass

def _on_network_state_changed(self, state):
self._network_alert(state)
self._update_3g_state()

def _update_3g_state(self):
from .roam import NetworkManagerHelper
nm = NetworkManagerHelper()
on_3g = nm.is_active_connection_gsm_or_cdma()
is_roaming = nm.is_active_connection_gsm_or_cdma_roaming()
self._network_3g_alert(on_3g, is_roaming)

def _network_3g_alert(self, on_3g, is_roaming):
self.emit("network-3g-alert", on_3g, is_roaming)

def _network_alert(self, state):
self.network_state = state
self.emit("network-alert", state)

def _power_changed(self):
obj = self.bus.get_object("org.freedesktop.UPower",
"/org/freedesktop/UPower")
interface = dbus.Interface(obj, "org.freedesktop.DBus.Properties")
on_battery = interface.Get("org.freedesktop.UPower", "OnBattery")
self.emit("battery-alert", on_battery)