[OneBot] Implemented upload_group_file API

Lagrange.OneBot/Core/Entity/Action/OneBotUploadGroupFile.cs

@@ -0,0 +1,15 @@
+using System.Text.Json.Serialization;
+
+namespace Lagrange.OneBot.Core.Entity.Action;
+
+[Serializable]
+public class OneBotUploadGroupFile
+{
+    [JsonPropertyName("group_id")] public uint GroupId { get; set; }
+
+    [JsonPropertyName("file")] public string File { get; set; } = string.Empty;
+
+    [JsonPropertyName("name")] public string? Name { get; set; }
+
+    [JsonPropertyName("folder")] public string Folder { get; set; } = string.Empty;
+}

Lagrange.OneBot/Core/Operation/Message/UploadGroupFileOperation.cs

@@ -0,0 +1,26 @@
+using System.Text.Json;
+using System.Text.Json.Nodes;
+using Lagrange.Core;
+using Lagrange.Core.Common.Interface.Api;
+using Lagrange.Core.Message.Entity;
+using Lagrange.OneBot.Core.Entity.Action;
+
+namespace Lagrange.OneBot.Core.Operation.Message;
+
+[Operation("upload_group_file")]
+public class UploadGroupFileOperation : IOperation
+{
+    public async Task<OneBotResult> HandleOperation(BotContext context, JsonNode? payload)
+    {
+        if (payload.Deserialize<OneBotUploadGroupFile>() is { } file)
+        {
+            var entity = new FileEntity(file.File);
+            if (file.Name != null) entity.FileName = file.Name;  // TODO: Implement Folder Parameter
+
+            bool result = await context.GroupFSUpload(file.GroupId, entity);
+            return new OneBotResult(null, result ? 0 : 1, result ? "ok" : "failed");
+        }
+
+        throw new Exception();
+    }
+}