From 59de1615ea67672ee4d8f77c7d706279271cb266 Mon Sep 17 00:00:00 2001
From: ishkong <19740260+ishkong@users.noreply.github.com>
Date: Fri, 6 Dec 2024 23:51:55 +0800
Subject: [PATCH 1/2] [OneBot] impl FileSegment

Signed-off-by: ishkong <19740260+ishkong@users.noreply.github.com>
---
 Lagrange.OneBot/Message/Entity/FileSegment.cs | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 Lagrange.OneBot/Message/Entity/FileSegment.cs

diff --git a/Lagrange.OneBot/Message/Entity/FileSegment.cs b/Lagrange.OneBot/Message/Entity/FileSegment.cs
new file mode 100644
index 000000000..b56ad87a1
--- /dev/null
+++ b/Lagrange.OneBot/Message/Entity/FileSegment.cs
@@ -0,0 +1,45 @@
+using System.Text.Json.Serialization;
+using Lagrange.Core.Message;
+using Lagrange.Core.Message.Entity;
+
+namespace Lagrange.OneBot.Message.Entity;
+
+[Serializable]
+public partial class FileSegment(string fileName, string fileHash, string fileId, string url)
+{
+    public FileSegment() : this("", "", "", "") { }
+    
+    [JsonPropertyName("filename")] public string Filename { get; set; } = fileName;
+    
+    [JsonPropertyName("filehash")] public string Filehash { get; set; }  = fileHash;
+
+    [JsonPropertyName("id")] public string Fileid { get; set; } = fileId;
+
+    [JsonPropertyName("url")] public string Url { get; set; } = url;
+    
+}
+
+[SegmentSubscriber(typeof(FileEntity), "file")]
+public partial class FileSegment : SegmentBase
+{
+    public override void Build(MessageBuilder builder, SegmentBase segment)
+    {
+        if (segment is FileSegment fileSegment and not { Fileid: "" })
+        {
+            builder.Add(new FileEntity
+            {
+                FileName = fileSegment.Filename,
+                FileUrl = fileSegment.Url,
+                FileId = fileSegment.Fileid,
+                FileHash = fileSegment.Filehash
+            });
+        }
+    }
+
+    public override SegmentBase FromEntity(MessageChain chain, IMessageEntity entity)
+    {
+        if (entity is not FileEntity fileEntity) throw new ArgumentException("Invalid entity type.");
+
+        return new FileSegment(fileEntity.FileName, fileEntity.FileHash ?? "", fileEntity.FileId ?? fileEntity.FileUuid ??  "", fileEntity.FileUrl ?? "");
+    }
+}
\ No newline at end of file

From 1dcd3b75504654e06268e0e98c1bfe0ae1f9a85b Mon Sep 17 00:00:00 2001
From: ishkong <19740260+ishkong@users.noreply.github.com>
Date: Sat, 7 Dec 2024 00:21:15 +0800
Subject: [PATCH 2/2] [Core] Save key information needed to refresh private
 chat file links

Signed-off-by: ishkong <19740260+ishkong@users.noreply.github.com>
---
 Lagrange.Core/Message/Entity/FileEntity.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Lagrange.Core/Message/Entity/FileEntity.cs b/Lagrange.Core/Message/Entity/FileEntity.cs
index acad46b2c..c7b8b662c 100644
--- a/Lagrange.Core/Message/Entity/FileEntity.cs
+++ b/Lagrange.Core/Message/Entity/FileEntity.cs
@@ -24,9 +24,9 @@ public class FileEntity : IMessageEntity
     /// </summary>
     public string? FileId { get; set; }
     
-    internal string? FileUuid { get; set; }
+    public string? FileUuid { get; set; }
     
-    internal string? FileHash { get; set; }
+    public string? FileHash { get; set; }
     
     internal Stream? FileStream { get; set; }