From d0bc56972ca8c73db60e180548baeb291f6308e9 Mon Sep 17 00:00:00 2001
From: Chad Pilkey <capilkey@gmail.com>
Date: Wed, 7 Feb 2018 16:45:38 -0500
Subject: [PATCH] [AIR] reset new messages when viewing chat and scroll to
 bottom

---
 .../lib/chat/models/GroupChat.as              |  5 ++++
 .../lib/chat/views/ChatViewMediatorBase.as    | 26 +++++++++++++++++--
 2 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/clients/flash/common-library/src/main/actionscript/org/bigbluebutton/lib/chat/models/GroupChat.as b/clients/flash/common-library/src/main/actionscript/org/bigbluebutton/lib/chat/models/GroupChat.as
index 43429099cf..5582bfdec9 100755
--- a/clients/flash/common-library/src/main/actionscript/org/bigbluebutton/lib/chat/models/GroupChat.as
+++ b/clients/flash/common-library/src/main/actionscript/org/bigbluebutton/lib/chat/models/GroupChat.as
@@ -2,6 +2,7 @@ package org.bigbluebutton.lib.chat.models {
 	import mx.collections.ArrayCollection;
 	
 	import org.bigbluebutton.lib.chat.utils.ChatUtil;
+	import org.osflash.signals.Signal;
 	
 	[Bindable]
 	public class GroupChat {
@@ -21,6 +22,8 @@ package org.bigbluebutton.lib.chat.models {
 		
 		public var newMessages:Number = 0;
 		
+		public var newMessageSignal:Signal = new Signal();
+		
 		public function GroupChat(chatId:String, name:String, isPublic:Boolean, partnerId:String) {
 			this.chatId = chatId;
 			this.name = name;
@@ -33,6 +36,7 @@ package org.bigbluebutton.lib.chat.models {
 				convertAndAddChatMessage(message);
 			}
 			newMessages += messages.length;
+			newMessageSignal.dispatch(chatId);
 		}
 		
 		public function clearMessages():void {
@@ -44,6 +48,7 @@ package org.bigbluebutton.lib.chat.models {
 		public function newChatMessage(message:ChatMessageVO):void {
 			convertAndAddChatMessage(message);
 			newMessages++;
+			newMessageSignal.dispatch(chatId);
 		}
 		
 		private function convertAndAddChatMessage(message:ChatMessageVO):void {
diff --git a/clients/flash/common-library/src/main/actionscript/org/bigbluebutton/lib/chat/views/ChatViewMediatorBase.as b/clients/flash/common-library/src/main/actionscript/org/bigbluebutton/lib/chat/views/ChatViewMediatorBase.as
index 2d7465ed26..ba498416a3 100755
--- a/clients/flash/common-library/src/main/actionscript/org/bigbluebutton/lib/chat/views/ChatViewMediatorBase.as
+++ b/clients/flash/common-library/src/main/actionscript/org/bigbluebutton/lib/chat/views/ChatViewMediatorBase.as
@@ -15,6 +15,8 @@ package org.bigbluebutton.lib.chat.views {
 	
 	import robotlegs.bender.bundles.mvcs.Mediator;
 	
+	import spark.core.NavigationUnit;
+	
 	public class ChatViewMediatorBase extends Mediator {
 		
 		[Inject]
@@ -41,9 +43,25 @@ package org.bigbluebutton.lib.chat.views {
 		}
 		
 		protected function openChat(chat:GroupChat):void {
+			if (_chat) {
+				_chat.newMessageSignal.remove(onNewMessage);
+			}
+			
 			_chat = chat;
-			_chat.newMessages = 0; //resetNewMessages();
-			view.chatList.dataProvider = _chat.messages;
+			if (_chat) {
+				_chat.newMessages = 0; //resetNewMessages();
+				view.chatList.dataProvider = _chat.messages;
+				_chat.newMessageSignal.add(onNewMessage);
+			}
+		}
+		
+		protected function onNewMessage(chatId:String):void {
+			if (_chat && _chat.chatId == chatId) {
+				if (view) {
+					view.chatList.scroller.verticalScrollBar.value = view.chatList.scroller.verticalScrollBar.maximum;
+				}
+				_chat.newMessages = 0;
+			}
 		}
 		
 		private function onSendSuccess(result:String):void {
@@ -117,6 +135,10 @@ package org.bigbluebutton.lib.chat.views {
 			chatMessageService.sendMessageOnFailureSignal.remove(onSendFailure);
 			meetingData.users.userChangeSignal.remove(onUserChange);
 			
+			if (_chat) {
+				_chat.newMessageSignal.remove(onNewMessage);
+			}
+			
 			view.textInput.removeEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler);
 			view.sendButton.removeEventListener(MouseEvent.CLICK, sendButtonClickHandler);