From e5484ee833a9844c69420bbd5b1508cf6a04e1d1 Mon Sep 17 00:00:00 2001
From: Roland Gruber <post@rolandgruber.de>
Date: Mon, 20 May 2019 20:06:55 +0200
Subject: [PATCH] provide tab id

---
 lam/templates/lib/500_lam.js | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/lam/templates/lib/500_lam.js b/lam/templates/lib/500_lam.js
index f302cafb..85c31b58 100644
--- a/lam/templates/lib/500_lam.js
+++ b/lam/templates/lib/500_lam.js
@@ -1111,6 +1111,23 @@ window.lam.html.preventEnter = function() {
 	});
 }
 
+window.lam.tabs = window.lam.tabs || {};
+
+/**
+ * Returns the id of the current browser tab.
+ *
+ * @returns tab id
+ */
+window.lam.tabs.getTabId = function() {
+	var lamTabId = sessionStorage.getItem('lamTabId');
+	if (!lamTabId) {
+		var date = new Date();
+		lamTabId = date.getTime() + '-' + Math.floor(Math.random() * 10000000000);
+		sessionStorage.setItem('lamTabId', lamTabId);
+	}
+	return lamTabId;
+}
+
 window.lam.selfservice = window.lam.selfservice || {};
 
 /**