From 4232fa2f6ed7e7bed37eacc6a1d74081d45626b1 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Sat, 18 Feb 2017 16:06:03 +0300
Subject: [PATCH] Use QuietHours registry key only in latest Windows

Sometimes the windows quiet hours registry key gets set even in
Windows 7 (or older) and we disable notifications though it has
nothing to do with real user settings. Check for 8.1 at least.
---
 .../SourceFiles/platform/win/notifications_manager_win.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Telegram/SourceFiles/platform/win/notifications_manager_win.cpp b/Telegram/SourceFiles/platform/win/notifications_manager_win.cpp
index c828a7007..010005c87 100644
--- a/Telegram/SourceFiles/platform/win/notifications_manager_win.cpp
+++ b/Telegram/SourceFiles/platform/win/notifications_manager_win.cpp
@@ -546,6 +546,11 @@ bool QuietHoursEnabled = false;
 DWORD QuietHoursValue = 0;
 
 void queryQuietHours() {
+	if (QSysInfo::windowsVersion() < QSysInfo::WV_WINDOWS8_1) {
+		// No system quiet hours in Windows prior to Windows 8.1
+		return;
+	}
+
 	LPTSTR lpKeyName = L"Software\\Microsoft\\Windows\\CurrentVersion\\Notifications\\Settings";
 	LPTSTR lpValueName = L"NOC_GLOBAL_SETTING_TOASTS_ENABLED";
 	HKEY key;
@@ -558,7 +563,7 @@ void queryQuietHours() {
 	result = RegQueryValueEx(key, lpValueName, 0, &type, (LPBYTE)&value, &size);
 	RegCloseKey(key);
 
-	auto quietHoursEnabled = (result == ERROR_SUCCESS);
+	auto quietHoursEnabled = (result == ERROR_SUCCESS) && (value == 0);
 	if (QuietHoursEnabled != quietHoursEnabled) {
 		QuietHoursEnabled = quietHoursEnabled;
 		QuietHoursValue = value;