fix saving dynamic start time (#453)

CHANGELOG.md

@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
+### Fixed
+- Fix saving dynamic start time on schedule items
 
 ## [0.2.0-alpha] - 2021-10-23
 ### Fixed

ErsatzTV.Application/ProgramSchedules/Commands/ProgramScheduleItemCommandBase.cs

@@ -169,7 +169,7 @@ namespace ErsatzTV.Application.ProgramSchedules.Commands
                 {
                     ProgramScheduleId = programSchedule.Id,
                     Index = index,
-                    StartTime = FixDuration(item.StartTime.GetValueOrDefault()),
+                    StartTime = FixStartTime(item.StartTime),
                     CollectionType = item.CollectionType,
                     CollectionId = item.CollectionId,
                     MultiCollectionId = item.MultiCollectionId,
@@ -188,7 +188,7 @@ namespace ErsatzTV.Application.ProgramSchedules.Commands
                 {
                     ProgramScheduleId = programSchedule.Id,
                     Index = index,
-                    StartTime = FixDuration(item.StartTime.GetValueOrDefault()),
+                    StartTime = FixStartTime(item.StartTime),
                     CollectionType = item.CollectionType,
                     CollectionId = item.CollectionId,
                     MultiCollectionId = item.MultiCollectionId,
@@ -207,7 +207,7 @@ namespace ErsatzTV.Application.ProgramSchedules.Commands
                 {
                     ProgramScheduleId = programSchedule.Id,
                     Index = index,
-                    StartTime = FixDuration(item.StartTime.GetValueOrDefault()),
+                    StartTime = FixStartTime(item.StartTime),
                     CollectionType = item.CollectionType,
                     CollectionId = item.CollectionId,
                     MultiCollectionId = item.MultiCollectionId,
@@ -227,7 +227,7 @@ namespace ErsatzTV.Application.ProgramSchedules.Commands
                 {
                     ProgramScheduleId = programSchedule.Id,
                     Index = index,
-                    StartTime = FixDuration(item.StartTime.GetValueOrDefault()),
+                    StartTime = FixStartTime(item.StartTime),
                     CollectionType = item.CollectionType,
                     CollectionId = item.CollectionId,
                     MultiCollectionId = item.MultiCollectionId,
@@ -249,5 +249,10 @@ namespace ErsatzTV.Application.ProgramSchedules.Commands
 
         private static TimeSpan FixDuration(TimeSpan duration) =>
             duration >= TimeSpan.FromDays(1) ? duration.Subtract(TimeSpan.FromDays(1)) : duration;
+
+        private static TimeSpan? FixStartTime(TimeSpan? startTime) =>
+            startTime.HasValue && startTime.Value >= TimeSpan.FromDays(1)
+                ? startTime.Value.Subtract(TimeSpan.FromDays(1))
+                : startTime;
     }
 }