From ab605dbbb4fa0478f895b2d6b71a6d58e962328a Mon Sep 17 00:00:00 2001
From: hawkeye116477 <hawkeye116477@gmail.com>
Date: Tue, 17 Sep 2024 13:45:40 +0200
Subject: [PATCH] Detect if file is really locked

Sometimes lock file could remain despite no process is locking it. That's the reason we need to detect if it's really locked.
#84
---
 src/Helpers.cs                       | 14 ++++++++++++++
 src/LegendaryDownloadManager.xaml.cs |  3 ++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/Helpers.cs b/src/Helpers.cs
index 1d98288..2d57fef 100644
--- a/src/Helpers.cs
+++ b/src/Helpers.cs
@@ -135,5 +135,19 @@ public static double GetDouble(string value)
 
             return result;
         }
+
+        public static bool IsFileLocked(string filePath)
+        {
+            try
+            {
+                using FileStream inputStream = File.Open(filePath, FileMode.Open, FileAccess.Read, FileShare.None);
+                inputStream.Close();
+            }
+            catch (Exception)
+            {
+                return true;
+            }
+            return false;
+        }
     }
 }
diff --git a/src/LegendaryDownloadManager.xaml.cs b/src/LegendaryDownloadManager.xaml.cs
index 1bc68a1..26810d6 100644
--- a/src/LegendaryDownloadManager.xaml.cs
+++ b/src/LegendaryDownloadManager.xaml.cs
@@ -216,7 +216,8 @@ public void EnqueueMultipleJobs(List<DownloadManagerData.Download> downloadManag
 
         public static async Task WaitUntilLegendaryCloses()
         {
-            if (File.Exists(Path.Combine(LegendaryLauncher.ConfigPath, "installed.json.lock")))
+            var installedLockPath = Path.Combine(LegendaryLauncher.ConfigPath, "installed.json.lock");
+            if (File.Exists(installedLockPath) && Helpers.IsFileLocked(installedLockPath))
             {
                 await Task.Delay(1000);
                 await WaitUntilLegendaryCloses();