[IMPROVE] Typing indicators now use Real Names (#11164)

Part of an attempt to improve #11145

If the admin has "Use Real Name" on, typing indicators now show the real name, making life a lot easier for those who auto-generate usernames or otherwise have usernames that don't correlate with the user.

**Before, or with "Use Real Name" off**
![2018-06-15_21-52-59](https://user-images.githubusercontent.com/39674991/41487087-7cb40974-70e7-11e8-89c5-0336cb9e8592.png)

**After, with "Use Real Name" on**
![2018-06-15_21-53-15](https://user-images.githubusercontent.com/39674991/41487094-8540e01c-70e7-11e8-89f8-acefa1e9ae1a.png)

Enjoy!

packages/rocketchat-lib/server/functions/Notifications.js

@@ -115,11 +115,12 @@ RocketChat.Notifications = new class {
 
 RocketChat.Notifications.streamRoom.allowWrite(function(eventName, username, typing, extraData) {
 	const [roomId, e] = eventName.split('/');
+
 	if (e === 'webrtc') {
 		return true;
 	}
 	if (e === 'typing') {
-
+		const key = RocketChat.settings.get('UI_Use_Real_Name') ? 'name' : 'username';
 		// typing from livechat widget
 		if (extraData && extraData.token) {
 			const room = RocketChat.models.Rooms.findOneById(roomId);
@@ -130,12 +131,15 @@ RocketChat.Notifications.streamRoom.allowWrite(function(eventName, username, typ
 
 		const user = Meteor.users.findOne(this.userId, {
 			fields: {
-				username: 1
+				[key]: 1
 			}
 		});
-		if (user != null && user.username === username) {
-			return true;
+
+		if (!user) {
+			return false;
 		}
+
+		return user[key] === username;
 	}
 	return false;
 });

packages/rocketchat-ui/client/lib/msgTyping.js

@@ -9,14 +9,24 @@ export const MsgTyping = (function() {
 	const usersTyping = {};
 	const dep = new Tracker.Dependency;
 
+	const shownName = function(user) {
+		if (!user) {
+			return;
+		}
+		if (RocketChat.settings.get('UI_Use_Real_Name')) {
+			return user.name;
+		}
+		return user.username;
+	};
+
 	const addStream = function(room) {
 		if (!_.isEmpty(usersTyping[room] && usersTyping[room].users)) {
 			return;
 		}
 		usersTyping[room] = { users: {} };
 		return RocketChat.Notifications.onRoom(room, 'typing', function(username, typing) {
-			const user = Meteor.user();
-			if (username === (user && user.username)) {
+			const user = Meteor.users.findOne(Meteor.userId(), { fields: { name: 1, username: 1 } });
+			if (username === shownName(user)) {
 				return;
 			}
 			const { users } = usersTyping[room];
@@ -43,7 +53,7 @@ export const MsgTyping = (function() {
 			timeouts[room] = null;
 		}
 		const user = Meteor.user();
-		return RocketChat.Notifications.notifyRoom(room, 'typing', user && user.username, false);
+		return RocketChat.Notifications.notifyRoom(room, 'typing', shownName(user), false);
 	};
 	const start = function(room) {
 		if (!renew) { return; }
@@ -53,7 +63,7 @@ export const MsgTyping = (function() {
 		renew = false;
 		selfTyping.set(true);
 		const user = Meteor.user();
-		RocketChat.Notifications.notifyRoom(room, 'typing', user && user.username, true);
+		RocketChat.Notifications.notifyRoom(room, 'typing', shownName(user), true);
 		clearTimeout(timeouts[room]);
 		return timeouts[room] = Meteor.setTimeout(() => stop(room), timeout);
 	};