add playout template duration scheduler (#1811)

* fix loop with missing content

* implement template duration scheduler

ErsatzTV.Core/ErsatzTV.Core.csproj

@@ -27,6 +27,7 @@
       <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
       <PackageReference Include="Serilog" Version="4.0.0" />
       <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />
+      <PackageReference Include="TimeSpanParserUtil" Version="1.2.0" />
       <PackageReference Include="YamlDotNet" Version="16.0.0" />
     </ItemGroup>
     

ErsatzTV.Core/Scheduling/TemplateScheduling/PlayoutTemplateDurationItem.cs

@@ -0,0 +1,15 @@
+using YamlDotNet.Serialization;
+
+namespace ErsatzTV.Core.Scheduling.TemplateScheduling;
+
+public class PlayoutTemplateDurationItem : PlayoutTemplateItem
+{
+    public string Duration { get; set; }
+
+    public bool Trim { get; set; }
+
+    public string Fallback { get; set; }
+
+    [YamlMember(Alias = "discard_attempts", ApplyNamingConventions = false)]
+    public int DiscardAttempts { get; set; }
+}

ErsatzTV.Core/Scheduling/TemplateScheduling/PlayoutTemplateSchedulerDuration.cs

@@ -0,0 +1,119 @@
+using ErsatzTV.Core.Domain;
+using ErsatzTV.Core.Domain.Filler;
+using ErsatzTV.Core.Interfaces.Scheduling;
+using TimeSpanParserUtil;
+
+namespace ErsatzTV.Core.Scheduling.TemplateScheduling;
+
+public class PlayoutTemplateSchedulerDuration : PlayoutTemplateScheduler
+{
+    public static DateTimeOffset Schedule(
+        Playout playout,
+        DateTimeOffset currentTime,
+        PlayoutTemplateDurationItem duration,
+        IMediaCollectionEnumerator enumerator,
+        Option<IMediaCollectionEnumerator> fallbackEnumerator)
+    {
+        // TODO: move to up-front validation somewhere
+        if (!TimeSpanParser.TryParse(duration.Duration, out TimeSpan timeSpan))
+        {
+            return currentTime;
+        }
+
+        DateTimeOffset targetTime = currentTime.Add(timeSpan);
+
+        return Schedule(
+            playout,
+            currentTime,
+            targetTime,
+            duration.DiscardAttempts,
+            duration.Trim,
+            enumerator,
+            fallbackEnumerator);
+    }
+
+    protected static DateTimeOffset Schedule(
+        Playout playout,
+        DateTimeOffset currentTime,
+        DateTimeOffset targetTime,
+        int discardAttempts,
+        bool trim,
+        IMediaCollectionEnumerator enumerator,
+        Option<IMediaCollectionEnumerator> fallbackEnumerator)
+    {
+        bool done = false;
+        TimeSpan remainingToFill = targetTime - currentTime;
+        while (!done && enumerator.Current.IsSome && remainingToFill > TimeSpan.Zero)
+        {
+            foreach (MediaItem mediaItem in enumerator.Current)
+            {
+                TimeSpan itemDuration = DurationForMediaItem(mediaItem);
+
+                var playoutItem = new PlayoutItem
+                {
+                    MediaItemId = mediaItem.Id,
+                    Start = currentTime.UtcDateTime,
+                    Finish = currentTime.UtcDateTime + itemDuration,
+                    InPoint = TimeSpan.Zero,
+                    OutPoint = itemDuration,
+                    //GuideGroup = playoutBuilderState.NextGuideGroup,
+                    //FillerKind = fillerKind,
+                    //DisableWatermarks = !allowWatermarks
+                };
+
+                if (remainingToFill - itemDuration >= TimeSpan.Zero)
+                {
+                    remainingToFill -= itemDuration;
+                    currentTime += itemDuration;
+
+                    playout.Items.Add(playoutItem);
+                    enumerator.MoveNext();
+                }
+                else if (discardAttempts > 0)
+                {
+                    // item won't fit; try the next one
+                    discardAttempts--;
+                    enumerator.MoveNext();
+                }
+                else if (trim)
+                {
+                    // trim item to exactly fit
+                    remainingToFill = TimeSpan.Zero;
+                    currentTime = targetTime;
+
+                    playoutItem.Finish = targetTime.UtcDateTime;
+                    playoutItem.OutPoint = playoutItem.Finish - playoutItem.Start;
+
+                    playout.Items.Add(playoutItem);
+                    enumerator.MoveNext();
+                }
+                else if (fallbackEnumerator.IsSome)
+                {
+                    foreach (IMediaCollectionEnumerator fallback in fallbackEnumerator)
+                    {
+                        remainingToFill = TimeSpan.Zero;
+                        done = true;
+
+                        // replace with fallback content
+                        foreach (MediaItem fallbackItem in fallback.Current)
+                        {
+                            playoutItem.MediaItemId = fallbackItem.Id;
+                            playoutItem.Finish = targetTime.UtcDateTime;
+                            playoutItem.FillerKind = FillerKind.Fallback;
+
+                            playout.Items.Add(playoutItem);
+                            fallback.MoveNext();
+                        }
+                    }
+                }
+                else
+                {
+                    // item won't fit; we're done
+                    done = true;
+                }
+            }
+        }
+
+        return targetTime;
+    }
+}

ErsatzTV.Core/Scheduling/TemplateScheduling/PlayoutTemplateSchedulerPadToNext.cs

@@ -1,10 +1,9 @@
 using ErsatzTV.Core.Domain;
-using ErsatzTV.Core.Domain.Filler;
 using ErsatzTV.Core.Interfaces.Scheduling;
 
 namespace ErsatzTV.Core.Scheduling.TemplateScheduling;
 
-public class PlayoutTemplateSchedulerPadToNext : PlayoutTemplateScheduler
+public class PlayoutTemplateSchedulerPadToNext : PlayoutTemplateSchedulerDuration
 {
     public static DateTimeOffset Schedule(
         Playout playout,
@@ -33,80 +32,13 @@ public class PlayoutTemplateSchedulerPadToNext : PlayoutTemplateScheduler
         if (targetTime <= currentTime)
             targetTime = targetTime.AddMinutes(padToNext.PadToNext);
 
-        int discardAttempts = padToNext.DiscardAttempts;
-        bool done = false;
-        TimeSpan remainingToFill = targetTime - currentTime;
-        while (!done && enumerator.Current.IsSome && remainingToFill > TimeSpan.Zero)
-        {
-            foreach (MediaItem mediaItem in enumerator.Current)
-            {
-                TimeSpan itemDuration = DurationForMediaItem(mediaItem);
-
-                var playoutItem = new PlayoutItem
-                {
-                    MediaItemId = mediaItem.Id,
-                    Start = currentTime.UtcDateTime,
-                    Finish = currentTime.UtcDateTime + itemDuration,
-                    InPoint = TimeSpan.Zero,
-                    OutPoint = itemDuration,
-                    //GuideGroup = playoutBuilderState.NextGuideGroup,
-                    //FillerKind = fillerKind,
-                    //DisableWatermarks = !allowWatermarks
-                };
-
-                if (remainingToFill - itemDuration >= TimeSpan.Zero)
-                {
-                    remainingToFill -= itemDuration;
-                    currentTime += itemDuration;
-
-                    playout.Items.Add(playoutItem);
-                    enumerator.MoveNext();
-                }
-                else if (discardAttempts > 0)
-                {
-                    // item won't fit; try the next one
-                    discardAttempts--;
-                    enumerator.MoveNext();
-                }
-                else if (padToNext.Trim)
-                {
-                    // trim item to exactly fit
-                    remainingToFill = TimeSpan.Zero;
-                    currentTime = targetTime;
-
-                    playoutItem.Finish = targetTime.UtcDateTime;
-                    playoutItem.OutPoint = playoutItem.Finish - playoutItem.Start;
-
-                    playout.Items.Add(playoutItem);
-                    enumerator.MoveNext();
-                }
-                else if (fallbackEnumerator.IsSome)
-                {
-                    foreach (IMediaCollectionEnumerator fallback in fallbackEnumerator)
-                    {
-                        remainingToFill = TimeSpan.Zero;
-                        done = true;
-
-                        // replace with fallback content
-                        foreach (MediaItem fallbackItem in fallback.Current)
-                        {
-                            playoutItem.MediaItemId = fallbackItem.Id;
-                            playoutItem.Finish = targetTime.UtcDateTime;
-                            playoutItem.FillerKind = FillerKind.Fallback;
-
-                            playout.Items.Add(playoutItem);
-                            fallback.MoveNext();
-                        }
-                    }
-                }
-                else
-                {
-                    // item won't fit; we're done
-                    done = true;
-                }
-            }
-        }
-
-        return targetTime;
+        return Schedule(
+            playout,
+            currentTime,
+            targetTime,
+            padToNext.DiscardAttempts,
+            padToNext.Trim,
+            enumerator,
+            fallbackEnumerator);
     }
 }

ErsatzTV.Core/Scheduling/TemplateScheduling/TemplatePlayoutBuilder.cs

@@ -44,6 +44,7 @@ public class TemplatePlayoutBuilder(
 
         // load content and content enumerators on demand
         Dictionary<string, IMediaCollectionEnumerator> enumerators = new();
+        System.Collections.Generic.HashSet<string> missingContentKeys = [];
 
         int itemsAfterRepeat = playout.Items.Count;
         var index = 0;
@@ -79,18 +80,35 @@ public class TemplatePlayoutBuilder(
                 cancellationToken);
 
             if (maybeEnumerator.IsNone)
+            {
+                if (!missingContentKeys.Contains(playoutItem.Content))
                 {
                     logger.LogWarning("Unable to locate content with key {Key}", playoutItem.Content);
-                continue;
+                    missingContentKeys.Add(playoutItem.Content);
+                }
             }
 
-            IMediaCollectionEnumerator enumerator = maybeEnumerator.ValueUnsafe();
-
+            foreach (IMediaCollectionEnumerator enumerator in maybeEnumerator)
+            {
                 switch (playoutItem)
                 {
                     case PlayoutTemplateCountItem count:
                         currentTime = PlayoutTemplateSchedulerCount.Schedule(playout, currentTime, count, enumerator);
                         break;
+                    case PlayoutTemplateDurationItem duration:
+                        Option<IMediaCollectionEnumerator> durationFallbackEnumerator = await GetCachedEnumeratorForContent(
+                            playout,
+                            playoutTemplate,
+                            enumerators,
+                            duration.Fallback,
+                            cancellationToken);
+                        currentTime = PlayoutTemplateSchedulerDuration.Schedule(
+                            playout,
+                            currentTime,
+                            duration,
+                            enumerator,
+                            durationFallbackEnumerator);
+                        break;
                     case PlayoutTemplatePadToNextItem padToNext:
                         Option<IMediaCollectionEnumerator> fallbackEnumerator = await GetCachedEnumeratorForContent(
                             playout,
@@ -106,6 +124,7 @@ public class TemplatePlayoutBuilder(
                             fallbackEnumerator);
                         break;
                 }
+            }
 
             index++;
         }
@@ -190,6 +209,7 @@ public class TemplatePlayoutBuilder(
                     var keyMappings = new Dictionary<string, Type>
                     {
                         { "count", typeof(PlayoutTemplateCountItem) },
+                        { "duration", typeof(PlayoutTemplateDurationItem) },
                         { "pad_to_next", typeof(PlayoutTemplatePadToNextItem) },
                         { "repeat", typeof(PlayoutTemplateRepeatItem) }
                     };