From 9fffef03889d6f396f073f9cb48c9a37bcb9043b Mon Sep 17 00:00:00 2001
From: hondacrx <prelude_20032002@yahoo.com>
Date: Wed, 23 Feb 2022 16:03:52 -0500
Subject: [PATCH] Core/Spells: Prevent manual cancelling of channelled spells
 that have SPELL_ATTR0_CANT_CANCEL

Port From (https://github.com/TrinityCore/TrinityCore/commit/1fc9e0172da4018ab24422bee51b025d0fb79701)
---
 Source/Game/Handlers/SpellHandler.cs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Source/Game/Handlers/SpellHandler.cs b/Source/Game/Handlers/SpellHandler.cs
index afec967e2..d0f389a0c 100644
--- a/Source/Game/Handlers/SpellHandler.cs
+++ b/Source/Game/Handlers/SpellHandler.cs
@@ -473,6 +473,18 @@ namespace Game
             if (mover != _player && mover.IsTypeId(TypeId.Player))
                 return;
 
+            var spellInfo = Global.SpellMgr.GetSpellInfo((uint)cancelChanneling.ChannelSpell, mover.GetMap().GetDifficultyID());
+            if (spellInfo == null)
+                return;
+
+            // not allow remove spells with attr SPELL_ATTR0_CANT_CANCEL
+            if (spellInfo.HasAttribute(SpellAttr0.CantCancel))
+                return;
+
+            var spell = mover.GetCurrentSpell(CurrentSpellTypes.Channeled);
+            if (spell == null || spell.GetSpellInfo().Id != spellInfo.Id)
+                return;
+
             mover.InterruptSpell(CurrentSpellTypes.Channeled);
         }