clear block playout items without clearing history (#1581)

ErsatzTV.Application/Scheduling/Commands/EraseBlockPlayoutItems.cs

@@ -0,0 +1,3 @@
+namespace ErsatzTV.Application.Scheduling;
+
+public record EraseBlockPlayoutItems(int PlayoutId) : IRequest;

ErsatzTV.Application/Scheduling/Commands/EraseBlockPlayoutItemsHandler.cs

@@ -0,0 +1,50 @@
+using ErsatzTV.Core.Domain;
+using ErsatzTV.Core.Domain.Scheduling;
+using ErsatzTV.Infrastructure.Data;
+using ErsatzTV.Infrastructure.Extensions;
+using Microsoft.EntityFrameworkCore;
+
+namespace ErsatzTV.Application.Scheduling;
+
+public class EraseBlockPlayoutItemsHandler(IDbContextFactory<TvContext> dbContextFactory)
+    : IRequestHandler<EraseBlockPlayoutItems>
+{
+    public async Task Handle(EraseBlockPlayoutItems request, CancellationToken cancellationToken)
+    {
+        await using TvContext dbContext = await dbContextFactory.CreateDbContextAsync(cancellationToken);
+
+        Option<Playout> maybePlayout = await dbContext.Playouts
+            .Include(p => p.Items)
+            .Include(p => p.PlayoutHistory)
+            .Filter(p => p.ProgramSchedulePlayoutType == ProgramSchedulePlayoutType.Block)
+            .SelectOneAsync(p => p.Id, p => p.Id == request.PlayoutId);
+
+        foreach (Playout playout in maybePlayout)
+        {
+            // find the earliest item that finishes after "now"
+            Option<PlayoutItem> maybeFirstItem = playout.Items
+                .Filter(i => i.FinishOffset > DateTimeOffset.Now)
+                .OrderBy(i => i.StartOffset)
+                .HeadOrNone();
+
+            // delete all history starting with that item
+            // importantly, do NOT delete earlier history
+            foreach (PlayoutItem item in maybeFirstItem)
+            {
+                var toRemove = playout.PlayoutHistory.Filter(h => h.When >= item.Start).ToList();
+                foreach (PlayoutHistory history in toRemove)
+                {
+                    playout.PlayoutHistory.Remove(history);
+                }
+            }
+
+            // save history changes
+            await dbContext.SaveChangesAsync(cancellationToken);
+            
+            // delete all playout items
+            await dbContext.Database.ExecuteSqlAsync(
+                $"DELETE FROM PlayoutItem WHERE PlayoutId = {playout.Id}",
+                cancellationToken);
+        }
+    }
+}

ErsatzTV/Pages/Playouts.razor

@@ -78,6 +78,8 @@
                     </div>
                     @if (context.PlayoutType == ProgramSchedulePlayoutType.Flood)
                     {
+                        <div style="width: 48px"></div>
+                        <div style="width: 48px"></div>
                         <MudTooltip Text="Edit Alternate Schedules">
                             <MudIconButton Icon="@Icons.Material.Filled.EditCalendar"
                                            Disabled="@EntityLocker.IsPlayoutLocked(context.PlayoutId)"
@@ -107,9 +109,23 @@
                                            OnClick="@(_ => EditExternalJsonFile(context))">
                             </MudIconButton>
                         </MudTooltip>
+                        <div style="width: 48px"></div>
+                        <div style="width: 48px"></div>
                     }
                     else if (context.PlayoutType == ProgramSchedulePlayoutType.Block)
                     {
+                        <MudTooltip Text="Erase Items">
+                            <MudIconButton Icon="@Icons.Material.Filled.Clear"
+                                           Disabled="@EntityLocker.IsPlayoutLocked(context.PlayoutId)"
+                                           OnClick="@(_ => EraseItems(context))">
+                            </MudIconButton>
+                        </MudTooltip>
+                        <MudTooltip Text="Erase Items and History">
+                            <MudIconButton Icon="@Icons.Material.Filled.ClearAll"
+                                           Disabled="@EntityLocker.IsPlayoutLocked(context.PlayoutId)"
+                                           OnClick="@(_ => EraseHistory(context))">
+                            </MudIconButton>
+                        </MudTooltip>
                         <MudTooltip Text="Edit Templates">
                             <MudIconButton Icon="@Icons.Material.Filled.Edit"
                                            Disabled="@EntityLocker.IsPlayoutLocked(context.PlayoutId)"
@@ -122,12 +138,7 @@
                                            OnClick="@(_ => ResetPlayout(context))">
                             </MudIconButton>
                         </MudTooltip>
-                        <MudTooltip Text="Erase Items and History">
-                            <MudIconButton Icon="@Icons.Material.Filled.Clear"
-                                           Disabled="@EntityLocker.IsPlayoutLocked(context.PlayoutId)"
-                                           OnClick="@(_ => EraseHistory(context))">
-                            </MudIconButton>
-                        </MudTooltip>
+                        <div style="width: 48px"></div>
                     }
                     <MudTooltip Text="Delete Playout">
                         <MudIconButton Icon="@Icons.Material.Filled.Delete"
@@ -287,6 +298,19 @@
         }
     }
 
+    private async Task EraseItems(PlayoutNameViewModel playout)
+    {
+        if (playout.PlayoutType is ProgramSchedulePlayoutType.Block)
+        {
+            await Mediator.Send(new EraseBlockPlayoutItems(playout.PlayoutId), _cts.Token);
+        }
+
+        if (_selectedPlayoutId == playout.PlayoutId)
+        {
+            await PlayoutSelected(playout);
+        }
+    }
+
     private async Task EraseHistory(PlayoutNameViewModel playout)
     {
         if (playout.PlayoutType is ProgramSchedulePlayoutType.Block)