From 57ca869652a27ee141d6fcaab7fa2c27c451b545 Mon Sep 17 00:00:00 2001
From: Jason Dove <jason@jasondove.me>
Date: Sat, 20 Feb 2021 11:40:36 -0600
Subject: [PATCH] don't get stuck building a playout with an empty collection

---
 ErsatzTV.Core/Scheduling/PlayoutBuilder.cs       | 11 +++++++++++
 ErsatzTV/Shared/RemoveFromCollectionDialog.razor |  2 +-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/ErsatzTV.Core/Scheduling/PlayoutBuilder.cs b/ErsatzTV.Core/Scheduling/PlayoutBuilder.cs
index acf835b82..e6b3f3945 100644
--- a/ErsatzTV.Core/Scheduling/PlayoutBuilder.cs
+++ b/ErsatzTV.Core/Scheduling/PlayoutBuilder.cs
@@ -7,6 +7,7 @@ using ErsatzTV.Core.Domain;
 using ErsatzTV.Core.Interfaces.Repositories;
 using ErsatzTV.Core.Interfaces.Scheduling;
 using LanguageExt;
+using LanguageExt.UnsafeValueAccess;
 using Microsoft.Extensions.Logging;
 using static LanguageExt.Prelude;
 using Map = LanguageExt.Map;
@@ -57,6 +58,16 @@ namespace ErsatzTV.Core.Scheduling
                 playout.Channel.Number,
                 playout.Channel.Name);
 
+            Option<string> emptyCollection = collectionMediaItems.Find(c => !c.Value.Any()).Map(c => c.Key.Name);
+            if (emptyCollection.IsSome)
+            {
+                _logger.LogError(
+                    "Unable to rebuild playout; collection {Name} has no items!",
+                    emptyCollection.ValueUnsafe());
+
+                return playout;
+            }
+
             playout.Items ??= new List<PlayoutItem>();
             playout.ProgramScheduleAnchors ??= new List<PlayoutProgramScheduleAnchor>();
 
diff --git a/ErsatzTV/Shared/RemoveFromCollectionDialog.razor b/ErsatzTV/Shared/RemoveFromCollectionDialog.razor
index 229bcf22c..da643724b 100644
--- a/ErsatzTV/Shared/RemoveFromCollectionDialog.razor
+++ b/ErsatzTV/Shared/RemoveFromCollectionDialog.razor
@@ -34,7 +34,7 @@
     [Parameter]
     public string DetailHighlight { get; set; }
 
-    private string FormatText() => $"Are you sure you want to remove the {EntityType} {EntityName} from this collection?";
+    private string FormatText() => $"Do you really want to remove the {EntityType} {EntityName} from this collection?";
 
     private void Submit() => MudDialog.Close(DialogResult.Ok(true));