[OneBot] Implemented SetGroupReactionOperation (#318)

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

@@ -0,0 +1,13 @@
+using System.Text.Json.Serialization;
+
+namespace Lagrange.OneBot.Core.Entity.Action;
+
+[Serializable]
+public class OneBotSetGroupReaction
+{
+    [JsonPropertyName("group_id")] public uint GroupId { get; set; }
+
+    [JsonPropertyName("message_id")] public uint MessageId { get; set; }
+
+    [JsonPropertyName("code")] public required string Code { get; set; }
+}

Lagrange.OneBot/Core/Operation/Group/SetGroupReactionOperation.cs

@@ -0,0 +1,25 @@
+using System.Text.Json;
+using System.Text.Json.Nodes;
+using Lagrange.Core;
+using Lagrange.Core.Common.Interface.Api;
+using Lagrange.OneBot.Core.Entity.Action;
+using Lagrange.OneBot.Core.Operation.Converters;
+
+namespace Lagrange.OneBot.Core.Operation.Group;
+
+[Operation("set_group_reaction")]
+public class SetGroupReactionOperation : IOperation
+{
+    public async Task<OneBotResult> HandleOperation(BotContext context, JsonNode? payload)
+    {
+        var message = payload.Deserialize<OneBotSetGroupReaction>(SerializerOptions.DefaultOptions);
+
+        if (message != null)
+        {
+            bool result = await context.GroupSetMessageReaction(message.GroupId, message.MessageId, message.Code);
+            return new OneBotResult(null, result ? 0 : 1, result ? "ok" : "failed");
+        }
+
+        throw new Exception();
+    }
+}