more scan check fixes (#1126)

ErsatzTV.Application/Emby/Commands/CallEmbyLibraryScannerHandler.cs

@@ -82,6 +82,11 @@ public class CallEmbyLibraryScannerHandler : CallLibraryScannerHandler<ISynchron
         int libraryRefreshInterval,
         ISynchronizeEmbyLibraryById request)
     {
+        if (lastScan == SystemTime.MaxValueUtc)
+        {
+            return false;
+        }
+
         DateTimeOffset nextScan = lastScan + TimeSpan.FromHours(libraryRefreshInterval);
         return request.ForceScan || (libraryRefreshInterval > 0 && nextScan < DateTimeOffset.Now);
     }

ErsatzTV.Application/Jellyfin/Commands/CallJellyfinLibraryScannerHandler.cs

@@ -82,6 +82,11 @@ public class CallJellyfinLibraryScannerHandler : CallLibraryScannerHandler<ISync
         int libraryRefreshInterval,
         ISynchronizeJellyfinLibraryById request)
     {
+        if (lastScan == SystemTime.MaxValueUtc)
+        {
+            return false;
+        }
+
         DateTimeOffset nextScan = lastScan + TimeSpan.FromHours(libraryRefreshInterval);
         return request.ForceScan || (libraryRefreshInterval > 0 && nextScan < DateTimeOffset.Now);
     }

ErsatzTV.Application/MediaSources/Commands/CallLocalLibraryScannerHandler.cs

@@ -81,6 +81,11 @@ public class CallLocalLibraryScannerHandler : CallLibraryScannerHandler<IScanLoc
         int libraryRefreshInterval,
         IScanLocalLibrary request)
     {
+        if (lastScan == SystemTime.MaxValueUtc)
+        {
+            return false;
+        }
+
         DateTimeOffset nextScan = lastScan + TimeSpan.FromHours(libraryRefreshInterval);
         return request.ForceScan || (libraryRefreshInterval > 0 && nextScan < DateTimeOffset.Now);
     }

ErsatzTV.Application/Plex/Commands/CallPlexLibraryScannerHandler.cs

@@ -87,6 +87,11 @@ public class CallPlexLibraryScannerHandler : CallLibraryScannerHandler<ISynchron
         int libraryRefreshInterval,
         ISynchronizePlexLibraryById request)
     {
+        if (lastScan == SystemTime.MaxValueUtc)
+        {
+            return false;
+        }
+
         DateTimeOffset nextScan = lastScan + TimeSpan.FromHours(libraryRefreshInterval);
         return request.ForceScan || (libraryRefreshInterval > 0 && nextScan < DateTimeOffset.Now);
     }