From c97a11bbdf4276e173bb2854a85eaa6df0d17380 Mon Sep 17 00:00:00 2001
From: Riley Testut <riley@rileytestut.com>
Date: Fri, 18 Aug 2023 18:01:57 -0500
Subject: [PATCH] Fixes race condition causing duplicate background refresh
 notifications (or none)

---
 AltStore/Operations/BackgroundRefreshAppsOperation.swift | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/AltStore/Operations/BackgroundRefreshAppsOperation.swift b/AltStore/Operations/BackgroundRefreshAppsOperation.swift
index 61cc32b4..7521c296 100644
--- a/AltStore/Operations/BackgroundRefreshAppsOperation.swift
+++ b/AltStore/Operations/BackgroundRefreshAppsOperation.swift
@@ -232,7 +232,8 @@ private extension BackgroundRefreshAppsOperation
             
             if shouldPresentAlert
             {
-                let trigger = UNTimeIntervalNotificationTrigger(timeInterval: delay + 1, repeats: false)
+                // Using nil if delay == 0 fixes race condition where multiple notifications can appear (or none).
+                let trigger = delay == 0 ? nil : UNTimeIntervalNotificationTrigger(timeInterval: delay + 1, repeats: false)
                 
                 let request = UNNotificationRequest(identifier: self.refreshIdentifier, content: content, trigger: trigger)
                 UNUserNotificationCenter.current().add(request)