fix automatic playout reset (#999)

CHANGELOG.md

@@ -9,6 +9,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   - This only happened with fixed start schedule items following a schedule item with tail or fallback filler
 - Fix NFO reader bug that caused inaccurate warning messages about invalid XML and incomplete metadata
 - Fix reverse proxy SSL termination support by supporting `X-Forwarded-Proto` header
+- Fix automatic playout reset scheduling
+  - Playouts would reset every 30 minutes between midnight and the configured time, instead of only at the configured time
 
 ### Added
 - Add music video credits template system

ErsatzTV/Services/SchedulerService.cs

@@ -138,8 +138,10 @@ public class SchedulerService : BackgroundService
 
             foreach (Playout playout in playouts.OrderBy(p => decimal.Parse(p.Channel.Number)))
             {
-                if (DateTime.Now.Subtract(DateTime.Today.Add(playout.DailyRebuildTime ?? TimeSpan.FromDays(7))) <
-                    TimeSpan.FromMinutes(5))
+                DateTime now = DateTime.Now;
+                DateTime target = DateTime.Today.Add(playout.DailyRebuildTime ?? TimeSpan.FromDays(7));
+                // check absolute diff
+                if (now.Subtract(target).Duration() < TimeSpan.FromMinutes(5))
                 {
                     await _workerChannel.WriteAsync(
                         new BuildPlayout(playout.Id, PlayoutBuildMode.Reset),