From bc720234f59d39119c9486ff88f248bacd3140c3 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@fakecake.org>
Date: Mon, 27 Feb 2017 09:28:19 +0300
Subject: periodically refresh worker cache on index load

---
 js/index.js | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'js/index.js')

diff --git a/js/index.js b/js/index.js
index c5f8926..336232f 100644
--- a/js/index.js
+++ b/js/index.js
@@ -1,3 +1,18 @@
+function cache_refresh() {
+	if ('serviceWorker' in navigator) {
+		localforage.getItem("epube-cache.timestamp").then(function(stamp) {
+			var ts = parseInt(new Date().getTime()/1000);
+
+			if (!stamp || ts - stamp > 3600) {
+				console.log('asking worker to refresh cache');
+				navigator.serviceWorker.controller.postMessage("refresh-cache");
+				localforage.setItem("epube-cache.timestamp", ts);
+			}
+
+		});
+	}
+}
+
 function mark_offline(elem) {
 
 	var bookId = elem.getAttribute("data-book-id");
-- 
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