##	notify.py
##
## Copyright (C) 2005-2006 Yann Le Boulanger <asterix@lagaule.org>
## Copyright (C) 2005-2007 Nikos Kouremenos <kourem@gmail.com>
## Copyright (C) 2005-2006 Andrew Sayman <lorien420@myrealbox.com>
## Copyright (C) 2007 Stephan Erb <steve-e@h3c.de> 
##
## Notification daemon connection via D-Bus code:
## Copyright (C) 2005 by Sebastian Estienne
##
## This file is part of Gajim.
##
## Gajim 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; version 3 only.
##
## Gajim 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 Gajim.  If not, see <http://www.gnu.org/licenses/>.
##

import os
import time
import dialogs
import gobject
import gtkgui_helpers

from common import gajim
from common import helpers

from common import dbus_support
if dbus_support.supported:
	import dbus
	import dbus.glib
	import dbus.service


USER_HAS_PYNOTIFY = True # user has pynotify module
try:
	import pynotify
	pynotify.init('Gajim Notification')
except ImportError:
	USER_HAS_PYNOTIFY = False

def get_show_in_roster(event, account, contact):
	'''Return True if this event must be shown in roster, else False'''
	if event == 'gc_message_received':
		return True
	num = get_advanced_notification(event, account, contact)
	if num != None:
		if gajim.config.get_per('notifications', str(num), 'roster') == 'yes':
			return True
		if gajim.config.get_per('notifications', str(num), 'roster') == 'no':
			return False
	if event == 'message_received':
		chat_control = helpers.get_chat_control(account, contact)
		if chat_control:
			return False
	return True

def get_show_in_systray(event, account, contact):
	'''Return True if this event must be shown in systray, else False'''
	num = get_advanced_notification(event, account, contact)
	if num != None:
		if gajim.config.get_per('notifications', str(num), 'systray') == 'yes':
			return True
		if gajim.config.get_per('notifications', str(num), 'systray') == 'no':
			return False
	return gajim.config.get('trayicon_notification_on_events')

def get_advanced_notification(event, account, contact):
	'''Returns the number of the first (top most)
	advanced notification else None'''
	num = 0
	notif = gajim.config.get_per('notifications', str(num))
	while notif:
		recipient_ok = False
		status_ok = False
		tab_opened_ok = False
		# test event
		if gajim.config.get_per('notifications', str(num), 'event') == event:
			# test recipient
			recipient_type = gajim.config.get_per('notifications', str(num),
				'recipient_type')
			recipients = gajim.config.get_per('notifications', str(num),
				'recipients').split()
			if recipient_type == 'all':
				recipient_ok = True
			elif recipient_type == 'contact' and contact.jid in recipients:
				recipient_ok = True
			elif recipient_type == 'group':
				for group in contact.groups:
					if group in contact.groups:
						recipient_ok = True
						break
		if recipient_ok:
			# test status
			our_status = gajim.SHOW_LIST[gajim.connections[account].connected]
			status = gajim.config.get_per('notifications', str(num), 'status')
			if status == 'all' or our_status in status.split():
				status_ok = True
		if status_ok:
			# test window_opened
			tab_opened = gajim.config.get_per('notifications', str(num),
				'tab_opened')
			if tab_opened == 'both':
				tab_opened_ok = True
			else:
				chat_control = helpers.get_chat_control(account, contact)
				if (chat_control and tab_opened == 'yes') or (not chat_control and \
				tab_opened == 'no'):
					tab_opened_ok = True
		if tab_opened_ok:
			return num

		num += 1
		notif = gajim.config.get_per('notifications', str(num))

def notify(event, jid, account, parameters, advanced_notif_num = None):
	'''Check what type of notifications we want, depending on basic 
	and the advanced configuration of notifications and do these notifications;
	advanced_notif_num holds the number of the first (top most) advanced
	notification'''
	# First, find what notifications we want
	do_popup = False
	do_sound = False
	do_cmd = False
	if event == 'status_change':
		new_show = parameters[0]
		status_message = parameters[1]
		# Default: No popup for status change
	elif event == 'contact_connected':
		status_message = parameters
		j = gajim.get_jid_without_resource(jid)
		server = gajim.get_server_from_jid(j)
		account_server = account + '/' + server
		block_transport = False
		if account_server in gajim.block_signed_in_notifications and \
		gajim.block_signed_in_notifications[account_server]:
			block_transport = True
		if helpers.allow_showing_notification(account, 'notify_on_signin') and \
		not gajim.block_signed_in_notifications[account] and not block_transport:
			do_popup = True
		if gajim.config.get_per('soundevents', 'contact_connected',
		'enabled') and not gajim.block_signed_in_notifications[account] and \
		not block_transport:
			do_sound = True
	elif event == 'contact_disconnected':
		status_message = parameters
		if helpers.allow_showing_notification(account, 'notify_on_signout'):
			do_popup = True
		if gajim.config.get_per('soundevents', 'contact_disconnected',
			'enabled'):
			do_sound = True
	elif event == 'new_message':
		message_type = parameters[0]
		is_first_message = parameters[1]
		nickname = parameters[2]
		if gajim.config.get('notification_preview_message'):
			message = parameters[3]
		else:
			# We don't want message preview, do_preview = False
			message = ''
		if helpers.allow_showing_notification(account, 'notify_on_new_message',
		advanced_notif_num, is_first_message):
			do_popup = True
		if is_first_message and helpers.allow_sound_notification(
		'first_message_received', advanced_notif_num):
			do_sound = True
		elif not is_first_message and helpers.allow_sound_notification(
		'next_message_received', advanced_notif_num):
			do_sound = True
	else:
		print '*Event not implemeted yet*'

	if advanced_notif_num is not None and gajim.config.get_per('notifications',
	str(advanced_notif_num), 'run_command'):
		do_cmd = True
			
	# Do the wanted notifications	
	if do_popup:
		if event in ('contact_connected', 'contact_disconnected',
		'status_change'): # Common code for popup for these three events
			if event == 'contact_disconnected':
				show_image = 'offline.png'
				suffix = '_notif_size_bw.png'
			else: #Status Change or Connected
				# FIXME: for status change,
				# we don't always 'online.png', but we 
				# first need 48x48 for all status
				show_image = 'online.png'
				suffix = '_notif_size_colored.png'	
			transport_name = gajim.get_transport_name_from_jid(jid)
			img = None
			if transport_name:
				img = os.path.join(helpers.get_transport_path(transport_name),
					'48x48', show_image) 
			if not img or not os.path.isfile(img):
				iconset = gajim.config.get('iconset')
				img = os.path.join(helpers.get_iconset_path(iconset), '48x48',
					show_image)
			path = gtkgui_helpers.get_path_to_generic_or_avatar(img,
				jid = jid, suffix = suffix)
			if event == 'status_change':
				title = _('%(nick)s Changed Status') % \
					{'nick': gajim.get_name_from_jid(account, jid)}
				text = _('%(nick)s is now %(status)s') % \
					{'nick': gajim.get_name_from_jid(account, jid),\
					'status': helpers.get_uf_show(gajim.SHOW_LIST[new_show])}
				if status_message:
					text = text + " : " + status_message
				popup(_('Contact Changed Status'), jid, account,
					path_to_image = path, title = title, text = text)
			elif event == 'contact_connected':
				title = _('%(nickname)s Signed In') % \
					{'nickname': gajim.get_name_from_jid(account, jid)}
				text = ''
				if status_message:
					text = status_message
				popup(_('Contact Signed In'), jid, account,
					path_to_image = path, title = title, text = text)
			elif event == 'contact_disconnected':
				title = _('%(nickname)s Signed Out') % \
					{'nickname': gajim.get_name_from_jid(account, jid)}
				text = ''
				if status_message:
					text = status_message
				popup(_('Contact Signed Out'), jid, account,
					path_to_image = path, title = title, text = text)
		elif event == 'new_message':
			if message_type == 'normal': # single message
				event_type = _('New Single Message')
				img = os.path.join(gajim.DATA_DIR, 'pixmaps', 'events',
					'single_msg_recv.png')
				title = _('New Single Message from %(nickname)s') % \
					{'nickname': nickname}
				text = message
			elif message_type == 'pm': # private message
				event_type = _('New Private Message')
				room_name = gajim.get_nick_from_jid(jid)
				img = os.path.join(gajim.DATA_DIR, 'pixmaps', 'events',
					'priv_msg_recv.png')
				title = _('New Private Message from group chat %s') % room_name
				if message:
					text = _('%(nickname)s: %(message)s') % {'nickname': nickname,
						'message': message}
				else:
					text = _('Messaged by %(nickname)s') % {'nickname': nickname}

			else: # chat message
				event_type = _('New Message')
				img = os.path.join(gajim.DATA_DIR, 'pixmaps', 'events',
					'chat_msg_recv.png')
				title = _('New Message from %(nickname)s') % \
					{'nickname': nickname}
				text = message
			path = gtkgui_helpers.get_path_to_generic_or_avatar(img)
			popup(event_type, jid, account, message_type,
				path_to_image = path, title = title, text = text)

	if do_sound:
		snd_file = None
		snd_event = None # If not snd_file, play the event
		if event == 'new_message':
			if advanced_notif_num is not None and gajim.config.get_per(
			'notifications', str(advanced_notif_num), 'sound') == 'yes':
				snd_file = gajim.config.get_per('notifications',
					str(advanced_notif_num), 'sound_file')
			elif advanced_notif_num is not None and gajim.config.get_per(
			'notifications', str(advanced_notif_num), 'sound') == 'no':
				pass # do not set snd_event
			elif is_first_message:
				snd_event = 'first_message_received'
			else:
				snd_event = 'next_message_received'
		elif event in ('contact_connected', 'contact_disconnected'):
			snd_event = event
		if snd_file:
			helpers.play_sound_file(snd_file)
		if snd_event:
			helpers.play_sound(snd_event)

	if do_cmd:
		command = gajim.config.get_per('notifications', str(advanced_notif_num),
			'command')
		try:
			helpers.exec_command(command)
		except:
			pass

def popup(event_type, jid, account, msg_type = '', path_to_image = None,
	title = None, text = None):
	'''Notifies a user of an event. It first tries to a valid implementation of
	the Desktop Notification Specification. If that fails, then we fall back to
	the older style PopupNotificationWindow method.'''
	text = gobject.markup_escape_text(text)
	title = gobject.markup_escape_text(title)

	if gajim.config.get('use_notif_daemon') and dbus_support.supported:
		try:
			DesktopNotification(event_type, jid, account, msg_type,
				path_to_image, title, text)
			return	# sucessfully did D-Bus Notification procedure!
		except dbus.DBusException, e:
			# Connection to D-Bus failed
			gajim.log.debug(str(e))
		except TypeError, e:
			# This means that we sent the message incorrectly
			gajim.log.debug(str(e))
	# we failed to speak to notification daemon via D-Bus
	if USER_HAS_PYNOTIFY: # try via libnotify
		if not text and event_type == 'new_message':
			# empty text for new_message means do_preview = False
			text = gajim.get_name_from_jid(account, jid) # default value of text
		if not title:
			title = event_type
		# default image
		if not path_to_image:
			path_to_image = os.path.abspath(
				os.path.join(gajim.DATA_DIR, 'pixmaps', 'events',
					'chat_msg_recv.png')) # img to display
		
		
		notification = pynotify.Notification(title, text)
		timeout = gajim.config.get('notification_timeout') * 1000 # make it ms
		notification.set_timeout(timeout)
		
		notification.set_category(event_type)
		notification.set_data('event_type', event_type)
		notification.set_data('jid', jid)
		notification.set_data('account', account)
		notification.set_data('msg_type', msg_type)
		notification.set_property('icon-name', path_to_image)
		notification.add_action('default', 'Default Action',
			on_pynotify_notification_clicked)

		try:
			notification.show()
			return
		except gobject.GError, e:
			# Connection to notification-daemon failed, see #2893
			gajim.log.debug(str(e))

	# go old style
	instance = dialogs.PopupNotificationWindow(event_type, jid, account,
		msg_type, path_to_image, title, text)
	gajim.interface.roster.popup_notification_windows.append(instance)

def on_pynotify_notification_clicked(notification, action):
	jid = notification.get_data('jid')
	account = notification.get_data('account')
	msg_type = notification.get_data('msg_type')

	notification.close()
	gajim.interface.handle_event(account, jid, msg_type)

class NotificationResponseManager:
	'''Collects references to pending DesktopNotifications and manages there
	signalling. This is necessary due to a bug in DBus where you can't remove
	a signal from an interface once it's connected.'''
	def __init__(self):
		self.pending = {}
		self.received = []
		self.interface = None

	def attach_to_interface(self):
		if self.interface is not None:
			return
		self.interface = dbus_support.get_notifications_interface()
		self.interface.connect_to_signal('ActionInvoked', self.on_action_invoked)
		self.interface.connect_to_signal('NotificationClosed', self.on_closed)

	def on_action_invoked(self, id, reason):
		self.received.append((id, time.time(), reason))
		if self.pending.has_key(id):
			notification = self.pending[id]
			notification.on_action_invoked(id, reason)
			del self.pending[id]
		if len(self.received) > 20:
			curt = time.time()
			for rec in self.received:
				diff = curt - rec[1]
				if diff > 10:
					self.received.remove(rec)

	def on_closed(self, id, reason = None):
		if self.pending.has_key(id):
			del self.pending[id]

	def add_pending(self, id, object):
		# Check to make sure that we handle an event immediately if we're adding
		# an id that's already been triggered
		for rec in self.received:
			if rec[0] == id:
				object.on_action_invoked(id, rec[2])
				self.received.remove(rec)
				return
		if id not in self.pending:
			# Add it
			self.pending[id] = object
		else:
			# We've triggered an event that has a duplicate ID!
			gajim.log.debug('Duplicate ID of notification. Can\'t handle this.')

notification_response_manager = NotificationResponseManager()

class DesktopNotification:
	'''A DesktopNotification that interfaces with D-Bus via the Desktop
	Notification specification'''
	def __init__(self, event_type, jid, account, msg_type = '',
		path_to_image = None, title = None, text = None):
		self.path_to_image = path_to_image
		self.event_type = event_type
		self.title = title
		self.text = text
		'''0.3.1 is the only version of notification daemon that has no way to determine which version it is. If no method exists, it means they're using that one.'''
		self.default_version = [0, 3, 1]
		self.account = account
		self.jid = jid
		self.msg_type = msg_type

		# default value of text
		if not text and event_type == 'new_message':
			# empty text for new_message means do_preview = False
			self.text = gajim.get_name_from_jid(account, jid)

		if not title:
			self.title = event_type # default value

		if event_type == _('Contact Signed In'):
			ntype = 'presence.online'
		elif event_type == _('Contact Signed Out'):
			ntype = 'presence.offline'
		elif event_type in (_('New Message'), _('New Single Message'),
			_('New Private Message')):
			ntype = 'im.received'
		elif event_type == _('File Transfer Request'):
			ntype = 'transfer'
		elif event_type == _('File Transfer Error'):
			ntype = 'transfer.error'
		elif event_type in (_('File Transfer Completed'), _('File Transfer Stopped')):
			ntype = 'transfer.complete'
		elif event_type == _('New E-mail'):
			ntype = 'email.arrived'
		elif event_type == _('Groupchat Invitation'):
			ntype = 'im.invitation'
		elif event_type == _('Contact Changed Status'):
			ntype = 'presence.status'
		elif event_type == _('Connection Failed'):
			ntype = 'connection.failed'
		else:
			# default failsafe values
			self.path_to_image = os.path.abspath(
				os.path.join(gajim.DATA_DIR, 'pixmaps', 'events',
					'chat_msg_recv.png')) # img to display
			ntype = 'im' # Notification Type

		self.notif = dbus_support.get_notifications_interface()
		if self.notif is None:
			raise dbus.DBusException('unable to get notifications interface')
		self.ntype = ntype

		self.get_version()

	def attempt_notify(self):
		version = self.version
		timeout = gajim.config.get('notification_timeout') # in seconds
		ntype = self.ntype
		if version[:2] == [0, 2]:
			try:
				self.notif.Notify(
					dbus.String(_('Gajim')),
					dbus.String(self.path_to_image),
					dbus.UInt32(0), 
					ntype, 
					dbus.Byte(0),
					dbus.String(self.title),
					dbus.String(self.text),
					[dbus.String(self.path_to_image)],
					{'default': 0}, 
					[''], 
					True,
					dbus.UInt32(timeout),
					reply_handler=self.attach_by_id,
					error_handler=self.notify_another_way)
			except AttributeError:
				version = [0, 3, 1] # we're actually dealing with the newer version
		if version > [0, 3]:
			if version >= [0, 3, 2]:
				hints = {}
				hints['urgency'] = dbus.Byte(0) # Low Urgency
				hints['category'] = dbus.String(ntype)
				self.notif.Notify(
					dbus.String(_('Gajim')),
					dbus.UInt32(0), # this notification does not replace other
					dbus.String(self.path_to_image),
					dbus.String(self.title),
					dbus.String(self.text), 
					( dbus.String('default'), dbus.String(self.event_type) ),
					hints, 
					dbus.UInt32(timeout*1000),
					reply_handler=self.attach_by_id,
					error_handler=self.notify_another_way)
			else:
				self.notif.Notify(
					dbus.String(_('Gajim')),
					dbus.String(self.path_to_image), 
					dbus.UInt32(0),
					dbus.String(self.title),
					dbus.String(self.text),
					dbus.String(''),
					{},
					dbus.UInt32(timeout*1000),
					reply_handler=self.attach_by_id,
					error_handler=self.notify_another_way)

	def attach_by_id(self, id):
		self.id = id
		notification_response_manager.attach_to_interface()
		notification_response_manager.add_pending(self.id, self)

	def notify_another_way(self,e):
		gajim.log.debug(str(e))
		gajim.log.debug('Need to implement a new way of falling back')

	def on_action_invoked(self, id, reason):
		if self.notif is None:
			return
		self.notif.CloseNotification(dbus.UInt32(id))
		self.notif = None
		if not self.msg_type:
			self.msg_type = 'chat'
		gajim.interface.handle_event(self.account, self.jid, self.msg_type)

	def version_reply_handler(self, name, vendor, version, spec_version = None):
		version_list = version.split('.')
		self.version = []
		while len(version_list):
			self.version.append(int(version_list.pop(0)))
		self.attempt_notify()

	def get_version(self):
		self.notif.GetServerInfo(
			reply_handler=self.version_reply_handler,
			error_handler=self.version_error_handler_2_x_try)

	def version_error_handler_2_x_try(self, e):
		self.notif.GetServerInformation(reply_handler=self.version_reply_handler,
			error_handler=self.version_error_handler_3_x_try)

	def version_error_handler_3_x_try(self, e):
		self.version = self.default_version
		self.attempt_notify()