fix playout builds using duration or multiple (#115)

ErsatzTV.Core/Domain/PlayoutAnchor.cs

@@ -1,4 +1,6 @@
 using System;
+using LanguageExt;
+using static LanguageExt.Prelude;
 
 namespace ErsatzTV.Core.Domain
 {
@@ -9,7 +11,13 @@ namespace ErsatzTV.Core.Domain
         public ProgramScheduleItem NextScheduleItem { get; set; }
 
         public DateTime NextStart { get; set; }
+        public int? MultipleRemaining { get; set; }
+        public DateTime? DurationFinish { get; set; }
 
         public DateTimeOffset NextStartOffset => new DateTimeOffset(NextStart, TimeSpan.Zero).ToLocalTime();
+
+        public Option<DateTimeOffset> DurationFinishOffset =>
+            Optional(DurationFinish)
+                .Map(durationFinish => new DateTimeOffset(durationFinish, TimeSpan.Zero).ToLocalTime());
     }
 }

ErsatzTV.Core/Metadata/LocalMetadataProvider.cs

@@ -113,7 +113,7 @@ namespace ErsatzTV.Core.Metadata
                     existing.Plot = metadata.Plot;
                     existing.Tagline = metadata.Tagline;
                     existing.Title = metadata.Title;
-                    
+
                     if (existing.DateAdded == DateTime.MinValue)
                     {
                         existing.DateAdded = metadata.DateAdded;
@@ -149,17 +149,17 @@ namespace ErsatzTV.Core.Metadata
                 async existing =>
                 {
                     var updated = false;
-                    
+
                     existing.Outline = metadata.Outline;
                     existing.Plot = metadata.Plot;
                     existing.Tagline = metadata.Tagline;
                     existing.Title = metadata.Title;
-                    
+
                     if (existing.DateAdded == DateTime.MinValue)
                     {
                         existing.DateAdded = metadata.DateAdded;
                     }
-                    
+
                     existing.DateUpdated = metadata.DateUpdated;
                     existing.MetadataKind = metadata.MetadataKind;
                     existing.OriginalTitle = metadata.OriginalTitle;
@@ -254,7 +254,7 @@ namespace ErsatzTV.Core.Metadata
                     existing.Plot = metadata.Plot;
                     existing.Tagline = metadata.Tagline;
                     existing.Title = metadata.Title;
-                    
+
                     if (existing.DateAdded == DateTime.MinValue)
                     {
                         existing.DateAdded = metadata.DateAdded;

ErsatzTV.Core/Scheduling/PlayoutBuilder.cs

@@ -145,8 +145,10 @@ namespace ErsatzTV.Core.Scheduling
             // start with the previously-decided schedule item
             int index = sortedScheduleItems.IndexOf(startAnchor.NextScheduleItem);
 
-            Option<int> multipleRemaining = None;
-            Option<DateTimeOffset> durationFinish = None;
+            // start with the previous multiple/duration states
+            Option<int> multipleRemaining = Optional(startAnchor.MultipleRemaining);
+            Option<DateTimeOffset> durationFinish = startAnchor.DurationFinishOffset;
+
             // loop until we're done filling the desired amount of time
             while (currentTime < playoutFinish)
             {
@@ -298,7 +300,9 @@ namespace ErsatzTV.Core.Scheduling
             {
                 NextScheduleItem = nextScheduleItem,
                 NextScheduleItemId = nextScheduleItem.Id,
-                NextStart = GetStartTimeAfter(nextScheduleItem, currentTime).UtcDateTime
+                NextStart = GetStartTimeAfter(nextScheduleItem, currentTime).UtcDateTime,
+                MultipleRemaining = multipleRemaining.IsSome ? multipleRemaining.ValueUnsafe() : null,
+                DurationFinish = durationFinish.IsSome ? durationFinish.ValueUnsafe().UtcDateTime : null
             };
 
             // build program schedule anchors