From 98fd9efc33fa7554e30a8c8869102904154266c5 Mon Sep 17 00:00:00 2001
From: Kushagra Gour <chinchang457@gmail.com>
Date: Tue, 23 Jan 2018 02:12:35 +0530
Subject: [PATCH] handle multitab error.

---
 src/auth.js | 4 +---
 src/db.js   | 5 ++++-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/auth.js b/src/auth.js
index 18561a2..8a8583e 100644
--- a/src/auth.js
+++ b/src/auth.js
@@ -1,5 +1,3 @@
-/* global trackEvent */
-
 window.logout = function logout() {
 	firebase.auth().signOut();
 };
@@ -20,7 +18,7 @@ function login(providerName) {
 		.auth()
 		.signInWithPopup(provider)
 		.then(function() {
-			trackEvent('fn', 'loggedIn', providerName);
+			window.trackEvent('fn', 'loggedIn', providerName);
 			// Save to recommend next time
 			window.db.local.set({ lastAuthProvider: providerName });
 		})
diff --git a/src/db.js b/src/db.js
index c2c9395..7346b12 100644
--- a/src/db.js
+++ b/src/db.js
@@ -58,7 +58,10 @@
 					if (err.code === 'failed-precondition') {
 						// Multiple tabs open, persistence can only be enabled
 						// in one tab at a a time.
-						// ...
+						alert(
+							"Opening Web Maker web app in multiple tabs isn't supported at present and it seems like you already have it opened in another tab. Please use in one tab."
+						);
+						window.trackEvent('fn', 'multiTabError');
 					} else if (err.code === 'unimplemented') {
 						// The current browser does not support all of the
 						// features required to enable persistence