From 617b1da842527bc806f8bcdeaaf76a431f5a6405 Mon Sep 17 00:00:00 2001
From: bolshoytoster <91278344+bolshoytoster@users.noreply.github.com>
Date: Thu, 5 Jun 2025 11:28:35 +0100
Subject: [PATCH] WebUI: Keep client session from expiring when the page is
 hidden

In #22567, I made it so the web UI wouldn't refresh the main data while the page is hidden. This causes the session to time out (after 1 hour by default).
This PR changes that to instead refresh every Preferences/WebUI/SessionTimeout / 2 instead of not at all, which should keep the session alive.

PR #22804.
---
 src/webui/www/private/scripts/client.js | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/webui/www/private/scripts/client.js b/src/webui/www/private/scripts/client.js
index 91d6f4695..09d43f9b5 100644
--- a/src/webui/www/private/scripts/client.js
+++ b/src/webui/www/private/scripts/client.js
@@ -73,6 +73,9 @@ window.qBittorrent.Client ??= (() => {
     };
 
     const getSyncMainDataInterval = () => {
+        // Sync at half of the session timeout (in ms), to prevent timing out
+        if (document.hidden)
+            return (window.qBittorrent.Cache.preferences.get().web_ui_session_timeout * 1000) / 2;
         return customSyncMainDataInterval ? customSyncMainDataInterval : serverSyncMainDataInterval;
     };
 
@@ -779,8 +782,6 @@ window.addEventListener("DOMContentLoaded", (event) => {
     let syncMainDataTimeoutID = -1;
     let syncRequestInProgress = false;
     const syncMainData = () => {
-        if (document.hidden)
-            return;
         syncRequestInProgress = true;
         const url = new URL("api/v2/sync/maindata", window.location);
         url.search = new URLSearchParams({
@@ -966,7 +967,9 @@ window.addEventListener("DOMContentLoaded", (event) => {
                     if (errorDiv)
                         errorDiv.textContent = "QBT_TR(qBittorrent client is not reachable)QBT_TR[CONTEXT=HttpServer]";
                     syncRequestInProgress = false;
-                    syncData(2000);
+                    syncData(document.hidden
+                        ? (window.qBittorrent.Cache.preferences.get().web_ui_session_timeout * 1000) / 2
+                        : 2000);
                 });
     };