fix chatroominfoview crash by reconfiguring the chatroom after entering background puis foreground

Classes/ChatConversationInfoView.h

@@ -34,6 +34,7 @@
 @property(nonatomic) NSString *oldSubject;
 @property(nonatomic) LinphoneChatRoom *room;
 @property(nonatomic) LinphoneChatRoomCbs *chatRoomCbs;
+@property(nonatomic) const char *peerAddress;
 
 @property (weak, nonatomic) IBOutlet UIIconButton *nextButton;
 @property (weak, nonatomic) IBOutlet UIRoundBorderedButton *quitButton;
@@ -49,6 +50,4 @@
 - (IBAction)onBackClick:(id)sender;
 - (IBAction)onQuitClick:(id)sender;
 
-- (void)removeCallbacks;
-
 @end

Classes/ChatConversationInfoView.m

@@ -83,12 +83,30 @@ static UICompositeViewDescription *compositeDescription = nil;
 	_oldContacts = [[NSMutableArray alloc] init];
 	_room = NULL;
 	_chatRoomCbs = NULL;
+	_peerAddress = NULL;
 }
 
 - (void)viewWillAppear:(BOOL)animated {
 	[super viewWillAppear:animated];
 	_waitView.hidden = YES;
 
+	[self configure];
+	[NSNotificationCenter.defaultCenter addObserver:self
+										   selector:@selector(onLinphoneCoreReady:)
+											   name:kLinphoneGlobalStateUpdate
+											 object:nil];
+}
+
+- (void)viewWillDisappear:(BOOL)animated {
+	[NSNotificationCenter.defaultCenter removeObserver:self];
+	if (!_room || !_chatRoomCbs)
+		return;
+
+	linphone_chat_room_remove_callbacks(_room, _chatRoomCbs);
+	_chatRoomCbs = NULL;
+}
+
+- (void)configure {
 	if (_create)
 		_room = NULL;
 
@@ -131,20 +149,20 @@ static UICompositeViewDescription *compositeDescription = nil;
 	[_tableView reloadData];
 }
 
-- (void)viewWillDisappear:(BOOL)animated {
-	[self removeCallbacks];
-}
-
-- (void)removeCallbacks {
-	if (!_room || !_chatRoomCbs)
-		return;
-
-	linphone_chat_room_remove_callbacks(_room, _chatRoomCbs);
-	_chatRoomCbs = NULL;
-}
-
 #pragma mark - next functions
 
+- (void)onLinphoneCoreReady:(NSNotification *)notif {
+	if ((LinphoneGlobalState)[[[notif userInfo] valueForKey:@"state"] integerValue] == LinphoneGlobalOn) {
+		if (!_create && _peerAddress) {
+			LinphoneAddress *peerAddr = linphone_core_create_address([LinphoneManager getLc], _peerAddress);
+			if (peerAddr) {
+				_room = linphone_core_get_chat_room([LinphoneManager getLc], peerAddr);
+			}
+			[self configure];
+		}
+	}
+}
+
 - (void)onCreate {
 	bctbx_list_t *addresses = NULL;
 	for (NSString *addr in _contacts) {

Classes/ChatConversationView.m

@@ -888,6 +888,7 @@ static UICompositeViewDescription *compositeDescription = nil;
 	view.oldAdmins = [admins mutableCopy];
 	view.oldSubject = [NSString stringWithUTF8String:linphone_chat_room_get_subject(_chatRoom) ?: LINPHONE_DUMMY_SUBJECT];
 	view.room = _chatRoom;
+	view.peerAddress = _peerAddress;
 	[PhoneMainView.instance changeCurrentView:view.compositeViewDescription];
 }
 

Classes/LinphoneAppDelegate.m

@@ -69,10 +69,6 @@
 			[view removeCallBacks];
 			[view.tableController setChatRoom:NULL];
 			[view setChatRoom:NULL];
-		} else if (PhoneMainView.instance.currentView == ChatConversationInfoView.compositeViewDescription) {
-			ChatConversationInfoView *view = VIEW(ChatConversationInfoView);
-			[view removeCallbacks];
-			[view setRoom:NULL];
 		} else if (PhoneMainView.instance.currentView == RecordingsListView.compositeViewDescription || PhoneMainView.instance.currentView == DevicesListView.compositeViewDescription) {
 			// To avoid crash
 			[PhoneMainView.instance changeCurrentView:DialerView.compositeViewDescription];