cache data for xmltv (#1228)

* cache channel list for xmltv

* used cached channel data for xmltv

* fixes

* update changelog

ErsatzTV/Services/SchedulerService.cs

@@ -1,6 +1,7 @@
 using System.Threading.Channels;
 using Bugsnag;
 using ErsatzTV.Application;
+using ErsatzTV.Application.Channels;
 using ErsatzTV.Application.Emby;
 using ErsatzTV.Application.Jellyfin;
 using ErsatzTV.Application.Maintenance;
@@ -91,6 +92,7 @@ public class SchedulerService : BackgroundService
         try
         {
             await DeleteOrphanedArtwork(cancellationToken);
+            await RefreshChannelGuideChannelList(cancellationToken);
             await BuildPlayouts(cancellationToken);
 #if !DEBUG_NO_SYNC
             await ScanLocalMediaSources(cancellationToken);
@@ -185,6 +187,9 @@ public class SchedulerService : BackgroundService
         }
     }
 
+    private ValueTask RefreshChannelGuideChannelList(CancellationToken cancellationToken) =>
+        _workerChannel.WriteAsync(new RefreshChannelList(), cancellationToken);
+
     private async Task ScanLocalMediaSources(CancellationToken cancellationToken)
     {
         using IServiceScope scope = _serviceScopeFactory.CreateScope();

ErsatzTV/Services/WorkerService.cs

@@ -1,6 +1,7 @@
 using System.Threading.Channels;
 using Bugsnag;
 using ErsatzTV.Application;
+using ErsatzTV.Application.Channels;
 using ErsatzTV.Application.Maintenance;
 using ErsatzTV.Application.MediaCollections;
 using ErsatzTV.Application.Playouts;
@@ -47,6 +48,12 @@ public class WorkerService : BackgroundService
 
                     switch (request)
                     {
+                        case RefreshChannelList refreshChannelList:
+                            await mediator.Send(refreshChannelList, cancellationToken);
+                            break;
+                        case RefreshChannelData refreshChannelData:
+                            await mediator.Send(refreshChannelData, cancellationToken);
+                            break;
                         case BuildPlayout buildPlayout:
                             Either<BaseError, Unit> buildPlayoutResult = await mediator.Send(
                                 buildPlayout,