add `advance` option to `epg_group` yaml playout instruction (#1942)

CHANGELOG.md

@@ -6,8 +6,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## [Unreleased]
 ### Added
 - Add `Reset All Playouts` button to top of playouts page
-- Add `rewind_on_reset` option to `wait_until` YAML playout instruction to allow
+- Add `rewind_on_reset` option to `wait_until` YAML playout instruction
   - This option allows YAML playouts to start in the past
+- Add `advance` option to `epg_group` YAML playout instruction
+  - When set to `false`, this option will lock the guide group without starting a new guide group
+  - This can be helpful for "post roll" items that should be part of the previous item's guide group
 
 ### Changed
 - **BREAKING CHANGE**: Change channel identifiers used in XMLTV to work around bad behavior in Plex

ErsatzTV.Core/Scheduling/YamlScheduling/Handlers/YamlPlayoutEpgGroupHandler.cs

@@ -21,7 +21,8 @@ public class YamlPlayoutEpgGroupHandler : IYamlPlayoutHandler
 
         if (epgGroup.EpgGroup)
         {
-            context.LockGuideGroup();
+            // advance guide group by default
+            context.LockGuideGroup(epgGroup.Advance is null or true);
         }
         else
         {

ErsatzTV.Core/Scheduling/YamlScheduling/Models/YamlPlayoutEpgGroupInstruction.cs

@@ -6,4 +6,6 @@ public class YamlPlayoutEpgGroupInstruction : YamlPlayoutInstruction
 {
     [YamlMember(Alias = "epg_group", ApplyNamingConventions = false)]
     public bool EpgGroup { get; set; }
+
+    public bool? Advance { get; set; }
 }

ErsatzTV.Core/Scheduling/YamlScheduling/YamlPlayoutContext.cs

@@ -8,6 +8,7 @@ public class YamlPlayoutContext(Playout playout, YamlPlayoutDefinition definitio
     private readonly System.Collections.Generic.HashSet<int> _visitedInstructions = [];
     private int _instructionIndex;
     private bool _guideGroupLocked;
+    private int _guideGroup = guideGroup;
 
     public Playout Playout { get; } = playout;
 
@@ -31,21 +32,25 @@ public class YamlPlayoutContext(Playout playout, YamlPlayoutDefinition definitio
     {
         if (_guideGroupLocked)
         {
-            return guideGroup;
+            return _guideGroup;
         }
 
-        guideGroup++;
-        if (guideGroup > 1000)
+        _guideGroup++;
+        if (_guideGroup > 1000)
         {
-            guideGroup = 1;
+            _guideGroup = 1;
         }
 
-        return guideGroup;
+        return _guideGroup;
     }
 
-    public void LockGuideGroup()
+    public void LockGuideGroup(bool advance = true)
     {
-        NextGuideGroup();
+        if (advance)
+        {
+            NextGuideGroup();
+        }
+
         _guideGroupLocked = true;
     }