From 478faac945881ac207f12e23a3b02a70ae2579b9 Mon Sep 17 00:00:00 2001
From: barisusakli <barisusakli@gmail.com>
Date: Thu, 24 Dec 2015 09:52:25 +0200
Subject: [PATCH] closes #3997

---
 src/controllers/accounts/chats.js |  2 ++
 src/socket.io/modules.js          | 12 ++++++++++++
 src/views/admin/settings/chat.tpl |  5 +++++
 3 files changed, 19 insertions(+)

diff --git a/src/controllers/accounts/chats.js b/src/controllers/accounts/chats.js
index 66c4257f97..c30a4f0103 100644
--- a/src/controllers/accounts/chats.js
+++ b/src/controllers/accounts/chats.js
@@ -65,6 +65,8 @@ chatsController.get = function(req, res, callback) {
 			room.nextStart = recentChats.nextStart;
 			room.title = room.roomName;
 			room.breadcrumbs = helpers.buildBreadcrumbs([{text: '[[pages:chats]]', url: '/chats'}, {text: room.roomName}]);
+			room.maximumUsersInChatRoom = parseInt(meta.config.maximumUsersInChatRoom, 10) || 0;
+			room.showUserInput = !room.maximumUsersInChatRoom || room.maximumUsersInChatRoom > 2;
 
 			res.render('chats', room);
 		});
diff --git a/src/socket.io/modules.js b/src/socket.io/modules.js
index 9e1d221726..1e4dda83c7 100644
--- a/src/socket.io/modules.js
+++ b/src/socket.io/modules.js
@@ -125,6 +125,8 @@ SocketModules.chats.loadRoom = function(socket, data, callback) {
 		function (results, next) {
 			results.roomData.users = results.users;
 			results.roomData.isOwner = parseInt(results.roomData.owner, 10) === socket.uid;
+			results.roomData.maximumUsersInChatRoom = parseInt(meta.config.maximumUsersInChatRoom, 10) || 0;
+			results.roomData.showUserInput = !results.roomData.maximumUsersInChatRoom || results.roomData.maximumUsersInChatRoom > 2;
 			next(null, results.roomData);
 		}
 	], callback);
@@ -135,6 +137,16 @@ SocketModules.chats.addUserToRoom = function(socket, data, callback) {
 		return callback(new Error('[[error:invalid-data]]'));
 	}
 	async.waterfall([
+		function (next) {
+			Messaging.getUserCountInRoom(data.roomId, next);
+		},
+		function (userCount, next) {
+			var maxUsers = parseInt(meta.config.maximumUsersInChatRoom, 10) || 0;
+			if (maxUsers && userCount >= maxUsers) {
+				return next(new Error('[[error:cant-add-more-users-to-chat-room]]'));
+			}
+			next();
+		},
 		function (next) {
 			user.getUidByUsername(data.username, next);
 		},
diff --git a/src/views/admin/settings/chat.tpl b/src/views/admin/settings/chat.tpl
index 828bf339a0..0cb7b3fdca 100644
--- a/src/views/admin/settings/chat.tpl
+++ b/src/views/admin/settings/chat.tpl
@@ -20,6 +20,11 @@
 			<label>Maximum length of chat messages</label>
 			<input type="text" class="form-control" value="1000" data-field="maximumChatMessageLength">
 		</div>
+
+		<div class="form-group">
+			<label>Maximum number of users in chat rooms</label>
+			<input type="text" class="form-control" value="0" data-field="maximumUsersInChatRoom">
+		</div>
 	</div>
 </div>