Allow user to set their whatsapp profile picture

registersession.py

@@ -142,3 +142,6 @@ class RegisterSession(YowsupApp):
 
 	def requestVCard(self, buddy, ID):
 		pass
+
+	def setProfilePicture(self, previewPicture, fullPicture = None):
+		pass

whatsappbackend.py

@@ -117,6 +117,10 @@ class WhatsAppBackend(SpectrumBackend):
 		self.logger.debug("handleVCardRequest(user=%s, buddy=%s, ID=%s)", user, buddy, ID)
 		self.sessions[user].requestVCard(buddy, ID)
 
+	def handleVCardUpdatedRequest(self, user, photo, nickname):
+		self.logger.debug("handleVCardUpdatedRequest(user=%s, nickname=%s)", user, photo, nickname)
+		self.session[user].setProfilePicture(photo)
+
 	def relogin(self, user, legacyName, password, extra):
 		"""
 		Used to re-initialize the session object. Used when finished with
@@ -136,8 +140,6 @@ class WhatsAppBackend(SpectrumBackend):
 	def handleBuddyBlockToggled(self, user, buddy, blocked):
 		pass
 
-	def handleVCardUpdatedRequest(self, user, photo, nickname):
-		pass
 
 	def handleAttentionRequest(self, user, buddy, message):
 		pass

yowsupwrapper.py

@@ -259,7 +259,20 @@ class YowsupApp(object):
 		"""
 		iq = SetStatusIqProtocolEntity(statusText)
 		self.sendIq(iq)
-	
+
+	def setProfilePicture(self, previewPicture, fullPicture = None):
+		"""
+		Requests profile picture of whatsapp user
+		Args:
+			- previewPicture: (bytes) The preview picture
+			- fullPicture: (bytes) The full profile picture
+		"""
+		if fullPicture == None:
+			fullPicture = previewPicture
+		ownJid = self.stack.getLayerInterface(YowAuthenticationProtocolLayer).getUsername(full = True)
+		iq = SetPictureIqProtocolEntity(ownJid, previewPicture, fullPicture)
+		self.sendIq(iq)
+
 	def sendTyping(self, phoneNumber, typing):
 		"""
 		Notify buddy using phoneNumber that you are typing to him