[Core] parse markdown entity (LagrangeDev#658)

* add: parse markdown entity * fix: exception throw when preview markdown string
sisi0318 · Oct 24, 2024 · b5857eb · b5857eb
1 parent 946891c
commit b5857eb
Showing 1 changed file with 12 additions and 2 deletions.
diff --git a/Lagrange.Core/Message/Entity/MarkdownEntity.cs b/Lagrange.Core/Message/Entity/MarkdownEntity.cs
@@ -7,6 +7,7 @@
 
 namespace Lagrange.Core.Message.Entity;
 
+[MessageElement(typeof(CommonElem))]
 public class MarkdownEntity : IMessageEntity
 {
     public MarkdownData Data { get; set; }
@@ -30,9 +31,18 @@ public class MarkdownEntity : IMessageEntity
         }
     };
 
-    IMessageEntity? IMessageEntity.UnpackElement(Elem elem) => null;
+    IMessageEntity? IMessageEntity.UnpackElement(Elem elem)
+    {
+        if (elem.CommonElem?.ServiceType != 45 || elem.CommonElem?.BusinessType != 1)
+            return null;
+
+        return new MarkdownEntity(Serializer.Deserialize<MarkdownData>(elem.CommonElem.PbElem.AsSpan()));
+    }
 
-    public string ToPreviewString() => throw new NotImplementedException();
+    public string ToPreviewString()
+    {
+        return $"[Markdown] {Data.Content}";
+    }
 }
 
 [ProtoContract]