From 3a6190d0d8f2cca5b2001449c113ab4da1d4d169 Mon Sep 17 00:00:00 2001
From: DomCR <DomCR@users.noreply.github.com>
Date: Thu, 2 Jan 2025 21:49:24 +0100
Subject: [PATCH] IsDynamic flag

---
 src/ACadSharp.Tests/IO/DynamicBlockTests.cs   |  2 ++
 .../Objects/Evaluations/EvaluationGraph.cs    |  5 +++
 src/ACadSharp/Tables/BlockRecord.cs           | 34 +++++++++++++++++++
 3 files changed, 41 insertions(+)

diff --git a/src/ACadSharp.Tests/IO/DynamicBlockTests.cs b/src/ACadSharp.Tests/IO/DynamicBlockTests.cs
index b673b797..983cbfd3 100644
--- a/src/ACadSharp.Tests/IO/DynamicBlockTests.cs
+++ b/src/ACadSharp.Tests/IO/DynamicBlockTests.cs
@@ -48,6 +48,8 @@ public void DynamicBlocksTest(FileModel test)
 
 			BlockRecord blk = doc.BlockRecords["my-dynamic-block"];
 
+			Assert.True(blk.IsDynamic);
+
 			//Dictionary entry
 			EvaluationGraph eval = blk.XDictionary.GetEntry<EvaluationGraph>("ACAD_ENHANCEDBLOCK");
 
diff --git a/src/ACadSharp/Objects/Evaluations/EvaluationGraph.cs b/src/ACadSharp/Objects/Evaluations/EvaluationGraph.cs
index f9a10bae..a43a5c82 100644
--- a/src/ACadSharp/Objects/Evaluations/EvaluationGraph.cs
+++ b/src/ACadSharp/Objects/Evaluations/EvaluationGraph.cs
@@ -11,6 +11,11 @@ namespace ACadSharp.Objects.Evaluations
 	[DxfSubClass(DxfSubclassMarker.EvalGraph)]
 	public partial class EvaluationGraph : NonGraphicalObject
 	{
+		/// <summary>
+		/// Dictionary entry name for the object <see cref="EvaluationGraph"/>
+		/// </summary>
+		public const string DictionaryEntryName = "ACAD_ENHANCEDBLOCK";
+
 		/// <inheritdoc/>
 		public override ObjectType ObjectType => ObjectType.UNLISTED;
 
diff --git a/src/ACadSharp/Tables/BlockRecord.cs b/src/ACadSharp/Tables/BlockRecord.cs
index 7e1eb0fd..0c41d0f9 100644
--- a/src/ACadSharp/Tables/BlockRecord.cs
+++ b/src/ACadSharp/Tables/BlockRecord.cs
@@ -5,6 +5,7 @@
 using ACadSharp.Entities;
 using System.Linq;
 using System.Collections.Generic;
+using ACadSharp.Objects.Evaluations;
 
 namespace ACadSharp.Tables
 {
@@ -184,6 +185,39 @@ public SortEntitiesTable SortEntitiesTable
 			}
 		}
 
+		/// <summary>
+		/// Active flag if it has an <see cref="Objects.Evaluations.EvaluationGraph"/> attached to it with dynamic expressions.
+		/// </summary>
+		public bool IsDynamic
+		{
+			get
+			{
+				return this.EvaluationGraph != null;
+			}
+		}
+
+		/// <summary>
+		/// Gets the evaluation graph for this block if it has dynamic properties attached to it.
+		/// </summary>
+		public EvaluationGraph EvaluationGraph
+		{
+			get
+			{
+				if (this.XDictionary == null)
+				{
+					return null;
+				}
+				else if (this.XDictionary.TryGetEntry(EvaluationGraph.DictionaryEntryName, out EvaluationGraph table))
+				{
+					return table;
+				}
+				else
+				{
+					return null;
+				}
+			}
+		}
+
 		/// <summary>
 		/// Block entity for this record
 		/// </summary>