notify fallbacked chat room creation

src/chat/chat-room/abstract-chat-room.h

@@ -37,6 +37,7 @@ class EventLog;
 class LINPHONE_PUBLIC AbstractChatRoom : public Object, public CoreAccessor, public ConferenceInterface {
 	friend class ChatMessage;
 	friend class ChatMessagePrivate;
+	friend class ClientGroupToBasicChatRoomPrivate;
 	friend class CorePrivate;
 	friend class MainDb;
 	friend class ProxyChatRoomPrivate;

src/chat/chat-room/basic-chat-room.h

@@ -29,6 +29,7 @@ LINPHONE_BEGIN_NAMESPACE
 class BasicChatRoomPrivate;
 
 class LINPHONE_PUBLIC BasicChatRoom : public ChatRoom {
+	friend class Core;
 	friend class CorePrivate;
 
 public:

src/chat/chat-room/client-group-to-basic-chat-room.cpp

@@ -68,7 +68,12 @@ public:
 			cgcr->getPrivate()->setChatRoomListener(nullptr);
 			Core::deleteChatRoom(q->getSharedFromThis());
 			LinphoneChatRoom *lcr = L_GET_C_BACK_PTR(q);
-			L_SET_CPP_PTR_FROM_C_OBJECT(lcr, cgcr->getCore()->getOrCreateBasicChatRoom(invitedAddresses.front()));
+			shared_ptr<AbstractChatRoom> bcr = cgcr->getCore()->onlyGetOrCreateBasicChatRoom(invitedAddresses.front());
+			L_SET_CPP_PTR_FROM_C_OBJECT(lcr, bcr);
+			bcr->getPrivate()->setState(ChatRoom::State::Instantiated);
+			bcr->getPrivate()->setState(ChatRoom::State::Created);
+			cgcr->getCore()->getPrivate()->insertChatRoom(bcr);
+			cgcr->getCore()->getPrivate()->insertChatRoomWithDb(bcr);
 			return;
 		}
 		cgcr->getPrivate()->onCallSessionStateChanged(session, newState, message);

src/core/core-chat-room.cpp

@@ -185,6 +185,20 @@ shared_ptr<AbstractChatRoom> Core::createClientGroupChatRoom (const string &subj
 	return d->createClientGroupChatRoom(subject, true);
 }
 
+shared_ptr<AbstractChatRoom> Core::onlyGetOrCreateBasicChatRoom (const IdentityAddress &peerAddress, bool isRtt) {
+	list<shared_ptr<AbstractChatRoom>> chatRooms = findChatRooms(peerAddress);
+	if (!chatRooms.empty())
+		return chatRooms.front();
+
+	const ChatRoomId &chatRoomId = ChatRoomId(peerAddress, getDefaultLocalAddress(getSharedFromThis(), peerAddress));
+	shared_ptr<AbstractChatRoom> chatRoom;
+
+	BasicChatRoom *basicChatRoom = new BasicChatRoom(getSharedFromThis(), chatRoomId);
+	chatRoom.reset(basicChatRoom);
+
+	return chatRoom;
+}
+
 shared_ptr<AbstractChatRoom> Core::getOrCreateBasicChatRoom (const ChatRoomId &chatRoomId, bool isRtt) {
 	L_D();
 

src/core/core.h

@@ -107,6 +107,7 @@ public:
 		const IdentityAddress &localAddress
 	);
 
+	std::shared_ptr<AbstractChatRoom> onlyGetOrCreateBasicChatRoom (const IdentityAddress &peerAddress, bool isRtt = false);
 	std::shared_ptr<AbstractChatRoom> getOrCreateBasicChatRoom (const ChatRoomId &chatRoomId, bool isRtt = false);
 	std::shared_ptr<AbstractChatRoom> getOrCreateBasicChatRoom (const IdentityAddress &peerAddress, bool isRtt = false);