From fdafbf8c24516b2f8d4e01cb5d8a7d7adc9dd8ed Mon Sep 17 00:00:00 2001
From: "Wesley F. Young" <willamwei@outlook.com>
Date: Sat, 11 Jan 2025 17:51:35 +0800
Subject: [PATCH] [Core] Construct ForwardEntity with a single sequence

---
 Lagrange.Core/Message/Entity/ForwardEntity.cs |  7 +++++++
 Lagrange.Core/Message/MessageBuilder.cs       | 12 ++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/Lagrange.Core/Message/Entity/ForwardEntity.cs b/Lagrange.Core/Message/Entity/ForwardEntity.cs
index 81ca5dfdb..300b9cd85 100644
--- a/Lagrange.Core/Message/Entity/ForwardEntity.cs
+++ b/Lagrange.Core/Message/Entity/ForwardEntity.cs
@@ -31,6 +31,13 @@ public ForwardEntity()
         Elements = new List<Elem>();
     }
 
+    public ForwardEntity(uint sequence)
+    {
+        Sequence = sequence;
+        Uid = null;
+        Elements = new List<Elem>();
+    }
+
     public ForwardEntity(MessageChain chain)
     {
         Time = chain.Time;
diff --git a/Lagrange.Core/Message/MessageBuilder.cs b/Lagrange.Core/Message/MessageBuilder.cs
index f1acefd29..2ce88825e 100644
--- a/Lagrange.Core/Message/MessageBuilder.cs
+++ b/Lagrange.Core/Message/MessageBuilder.cs
@@ -121,6 +121,18 @@ public MessageBuilder Forward(MessageChain target)
 
         return this;
     }
+    
+    /// <summary>
+    /// Add a forward entity to the specified message sequence number
+    /// </summary>
+    /// <param name="sequence">The sequence number of the message to be forwarded</param>
+    public MessageBuilder Forward(uint sequence)
+    {
+        var forwardEntity = new ForwardEntity(sequence);
+        _chain.Add(forwardEntity);
+
+        return this;
+    }
 
     /// <summary>
     /// Add a multimsg entity to the message chain (multi message)