Update buddies when contact notification is received

buddy.py

@@ -201,3 +201,9 @@ class BuddyList(dict):
 			image_hash = pictureData.then(utils.sha1hash)
 			call(self.logger.debug, 'Image hash is %s', image_hash)
 			call(self.update, buddy, nick, groups, image_hash)
+
+	def refresh(self, number):
+		self.session.unsubscribePresence(number)
+		self.session.subscribePresence(number)
+		self.requestVCard(number)
+		self.session.requestStatuses([number], success = self.onStatus)

session.py

@@ -462,6 +462,33 @@ class Session(YowsupApp):
 		self.logger.debug("%s changed their profile picture", number)
 		self.buddies.requestVCard(number)
 
+	# Called by superclass
+	def onContactAdded(self, number, nick):
+		self.logger.debug("Adding new contact %s (%s)", nick, number)
+		self.updateBuddy(number, nick, [])
+
+	# Called by superclass
+	def onContactRemoved(self, number):
+		self.logger.debug("Removing contact %s", number)
+		self.removeBuddy(number)
+
+	def onContactUpdated(self, oldnumber, newnumber):
+		self.logger.debug("Contact has changed number from %s to %s",
+				oldnumber, newnumber)
+		if newnumber in self.buddies:
+			self.logger.warn("Contact %s exists, just updating", newnumber)
+			self.buddies.refresh(newnumber)
+		try:
+			buddy = self.buddies[oldnumber]
+		except KeyError:
+			self.logger.warn("Old contact (%s) not found. Adding new contact (%s)",
+				oldnumber, newnumber)
+			nick = ""
+		else:
+			self.removeBuddy(buddy.number)
+			nick = buddy.nick
+		self.updateBuddy(newnumber, nick, [])
+
 	def onPresenceReceived(self, _type, name, jid, lastseen):
 		self.logger.info("Presence received: %s %s %s %s", _type, name, jid, lastseen)
 		buddy = jid.split("@")[0]

yowsupwrapper.py

@@ -562,6 +562,32 @@ class YowsupApp(object):
 		"""
 		pass
 
+	def onContactRemoved(self, number):
+		"""Called when a contact has been removed
+
+		Args:
+			number: (str) the number of the contact who has been removed
+		"""
+		pass
+
+	def onContactAdded(self, number, nick):
+		"""Called when a contact has been added
+
+		Args:
+			number: (str) contacts number
+			nick: (str) contacts nickname
+		"""
+		pass
+
+	def onContactUpdated(self, oldNumber, newNumber):
+		"""Called when a contact has changed their number
+
+		Args:
+			oldNumber: (str) the number the contact previously used
+			newNumber: (str) the new number of the contact
+		"""
+		pass
+
 	def sendEntity(self, entity):
 		"""Sends an entity down the stack (as if YowsupAppLayer called toLower)"""
 		self.stack.broadcastEvent(YowLayerEvent(YowsupAppLayer.TO_LOWER_EVENT,
@@ -676,6 +702,18 @@ class YowsupAppLayer(YowInterfaceLayer):
 		elif (isinstance(entity, SetPictureNotificationProtocolEntity) or
 				isinstance(entity, DeletePictureNotificationProtocolEntity)):
 			self.caller.onContactPictureChanged(entity.setJid.split('@')[0])
+		elif isinstance(entity, RemoveContactNotificationProtocolEntity):
+			self.caller.onContactRemoved(entity.contactJid.split('@')[0])
+		elif isinstance(entity, AddContactNotificationProtocolEntity):
+			self.caller.onContactAdded(
+					entity.contactJid.split('@')[0],
+					entity.notify
+			)
+		elif isinstance(entity, UpdateContactNotificationProtocolEntity):
+			self.caller.onContactUpdated(
+					entity._from.split('@')[0],
+					entity.contactJid.split('@')[0],
+			)
 
 	@ProtocolEntityCallback('message')
 	def onMessageReceived(self, entity):