add button to copy block item (#1562)

ErsatzTV.Core/Scheduling/BlockScheduling/BlockPlayoutBuilder.cs

@@ -17,7 +17,7 @@ public class BlockPlayoutBuilder(
     ILogger<BlockPlayoutBuilder> logger)
     : IBlockPlayoutBuilder
 {
-    public async Task<Playout> Build(Playout playout, PlayoutBuildMode mode, CancellationToken cancellationToken)
+    public virtual async Task<Playout> Build(Playout playout, PlayoutBuildMode mode, CancellationToken cancellationToken)
     {
         Logger.LogDebug(
             "Building block playout {PlayoutId} for channel {ChannelNumber} - {ChannelName}",

ErsatzTV.Core/Scheduling/BlockScheduling/BlockPlayoutPreviewBuilder.cs

@@ -19,8 +19,24 @@ public class BlockPlayoutPreviewBuilder(
     artistRepository,
     logger), IBlockPlayoutPreviewBuilder
 {
+    private readonly Dictionary<Guid, System.Collections.Generic.HashSet<CollectionKey>> _randomizedCollections = [];
+
     protected override ILogger Logger => NullLogger.Instance;
 
+    public override async Task<Playout> Build(
+        Playout playout,
+        PlayoutBuildMode mode,
+        CancellationToken cancellationToken)
+    {
+        _randomizedCollections.Add(playout.Channel.UniqueId, []);
+
+        Playout result = await base.Build(playout, mode, cancellationToken);
+
+        _randomizedCollections.Remove(playout.Channel.UniqueId);
+
+        return result;
+    }
+
     protected override Task<int> GetDaysToBuild() => Task.FromResult(1);
 
     protected override IMediaCollectionEnumerator GetEnumerator(
@@ -30,16 +46,25 @@ public class BlockPlayoutPreviewBuilder(
         string historyKey,
         Map<CollectionKey, List<MediaItem>> collectionMediaItems)
     {
-        IMediaCollectionEnumerator enumerator = base.GetEnumerator(playout, blockItem, currentTime, historyKey, collectionMediaItems);
-        
+        IMediaCollectionEnumerator enumerator = base.GetEnumerator(
+            playout,
+            blockItem,
+            currentTime,
+            historyKey,
+            collectionMediaItems);
+
         var collectionKey = CollectionKey.ForBlockItem(blockItem);
-        
-        enumerator.ResetState(
-            new CollectionEnumeratorState
-            {
-                Seed = new Random().Next(),
-                Index = new Random().Next(collectionMediaItems[collectionKey].Count)
-            });
+        if (!_randomizedCollections[playout.Channel.UniqueId].Contains(collectionKey))
+        {
+            enumerator.ResetState(
+                new CollectionEnumeratorState
+                {
+                    Seed = new Random().Next(),
+                    Index = new Random().Next(collectionMediaItems[collectionKey].Count)
+                });
+
+            _randomizedCollections[playout.Channel.UniqueId].Add(collectionKey);
+        }
 
         return enumerator;
     }