include all block playout items in xmltv (#1580)

* include all block playout items in xmltv

* double check whether channel preview will work

ErsatzTV.Application/Channels/Commands/RefreshChannelDataHandler.cs

@@ -96,6 +96,7 @@ public class RefreshChannelDataHandler : IRequestHandler<RefreshChannelData>
             switch (playout.ProgramSchedulePlayoutType)
             {
                 case ProgramSchedulePlayoutType.Flood:
+                case ProgramSchedulePlayoutType.Block:
                     sorted.AddRange(playouts.Collect(p => p.Items).OrderBy(pi => pi.Start));
                     break;
                 case ProgramSchedulePlayoutType.ExternalJson:

ErsatzTV.Core/Scheduling/BlockScheduling/BlockPlayoutBuilder.cs

@@ -32,6 +32,8 @@ public class BlockPlayoutBuilder(
             playout.Channel.Number,
             playout.Channel.Name);
 
+        var random = new Random();
+
         List<PlaybackOrder> allowedPlaybackOrders =
         [
             PlaybackOrder.Chronological,
@@ -154,6 +156,7 @@ public class BlockPlayoutBuilder(
                         //PreferredAudioTitle = scheduleItem.PreferredAudioTitle,
                         //PreferredSubtitleLanguageCode = scheduleItem.PreferredSubtitleLanguageCode,
                         //SubtitleMode = scheduleItem.SubtitleMode
+                        GuideGroup = random.Next(),
                         BlockKey = JsonConvert.SerializeObject(effectiveBlock.BlockKey),
                         CollectionKey = JsonConvert.SerializeObject(collectionKey, JsonSettings),
                         CollectionEtag = collectionEtags[collectionKey]

ErsatzTV/Pages/Channels.razor

@@ -69,7 +69,7 @@
                     }
                     else
                     {
-                        <MudTooltip Text="Channel preview requires MPEG-TS/HLS Segmenter and H264/AAC">
+                        <MudTooltip Text="Channel preview requires playout, MPEG-TS/HLS Segmenter, and H264/AAC">
                             <MudIconButton Icon="@Icons.Material.Filled.PlayCircle" Disabled="true">
                             </MudIconButton>
                         </MudTooltip>
@@ -151,6 +151,11 @@
             return false;
         }
 
+        if (channel.PlayoutCount < 1)
+        {
+            return false;
+        }
+
         Option<FFmpegProfileViewModel> maybeProfile = Optional(_ffmpegProfiles.Find(p => p.Id == channel.FFmpegProfileId));
         foreach (FFmpegProfileViewModel profile in maybeProfile)
         {
@@ -162,7 +167,7 @@
 
     private async Task PreviewChannel(ChannelViewModel channel)
     {
-        if (channel.StreamingMode is StreamingMode.HttpLiveStreamingDirect or StreamingMode.TransportStream)
+        if (!CanPreviewChannel(channel))
         {
             return;
         }