check file modification times for local syncing instead of relying on a sync interval

1 files changed, 8 insertions, 6 deletions

diff --git a/js/app.js b/js/app.js
index 74c2fca..33333e8 100644
--- a/js/app.js
+++ b/js/app.js
@@ -37,6 +37,7 @@ const Cookie = {
 const App = {

     _dl_progress_timeout: false,

     index_mode: "",

+    last_mtime: -1,

     init: function() {

         let refreshed_files = 0;

 

@@ -74,8 +75,7 @@ const App = {
                 }

 

                 if (event.data == 'client-reload') {

-                    const ts = parseInt(new Date().getTime()/1000);

-                    localforage.setItem("epube.cache-timestamp", ts);

+                    localforage.setItem("epube.cache-timestamp", App.last_mtime);

                     window.location.reload()

                 }

 

@@ -156,9 +156,7 @@ const App = {
     refreshCache: function(force) {

         if ('serviceWorker' in navigator) {

             localforage.getItem("epube.cache-timestamp").then(function(stamp) {

-                const ts = parseInt(new Date().getTime()/1000);

-

-                if (force || !stamp || ts - stamp > 3600 * 24 * 7) {

+                if (force || stamp != App.last_mtime) {

                     console.log('asking worker to refresh cache');

 

                     if (navigator.serviceWorker.controller) {

@@ -190,8 +188,12 @@ const App = {
                         });

                     }

                 }

-

             });

+        } else {

+            $(".dl-progress")

+                .show()

+                .addClass("alert-danger")

+                .html("Could not communicate with service worker. Try reloading the page.");

         }

     },

     initOfflineEvents: function() {