add func SolveGroupJoinRequest().

README.md

@@ -37,6 +37,7 @@ qq-android协议的golang实现 移植于Mirai
 - [x] 收到其他用户进群请求
 - [ ] 新好友
 - [x] 新好友请求
+- [ ] 客户端离线
 
 #### 主动操作
 - [x] 发送群消息

client/builders.go

@@ -524,3 +524,42 @@ func (c *QQClient) buildSystemMsgNewFriendPacket() (uint16, []byte) {
 	packet := packets.BuildUniPacket(c.Uin, seq, "ProfileService.Pb.ReqSystemMsgNew.Friend", 1, c.OutGoingPacketSessionId, EmptyBytes, c.sigInfo.d2Key, payload)
 	return seq, packet
 }
+
+// ProfileService.Pb.ReqSystemMsgAction.Group
+func (c *QQClient) buildSystemMsgGroupActionPacket(reqId, requester, group int64, isInvite, accept, block bool) (uint16, []byte) {
+	seq := c.nextSeq()
+	req := &structmsg.ReqSystemMsgAction{
+		MsgType: 1,
+		MsgSeq:  reqId,
+		ReqUin:  requester,
+		SubType: 1,
+		SrcId:   3,
+		SubSrcId: func() int32 {
+			if isInvite {
+				return 10016
+			}
+			return 31
+		}(),
+		GroupMsgType: func() int32 {
+			if isInvite {
+				return 2
+			}
+			return 1
+		}(),
+		ActionInfo: &structmsg.SystemMsgActionInfo{
+			Type: func() int32 {
+				if accept {
+					return 11
+				}
+				return 12
+			}(),
+			GroupCode: group,
+			Blacklist: block,
+			Sig:       EmptyBytes,
+		},
+		Language: 1000,
+	}
+	payload, _ := proto.Marshal(req)
+	packet := packets.BuildUniPacket(c.Uin, seq, "ProfileService.Pb.ReqSystemMsgAction.Group", 1, c.OutGoingPacketSessionId, EmptyBytes, c.sigInfo.d2Key, payload)
+	return seq, packet
+}

client/client.go

@@ -344,6 +344,11 @@ func (c *QQClient) FindGroup(code int64) *GroupInfo {
 	return nil
 }
 
+func (c *QQClient) SolveGroupJoinRequest(req *UserJoinGroupRequest, accept bool) {
+	_, pkt := c.buildSystemMsgGroupActionPacket(req.RequestId, req.RequesterUin, req.GroupCode, false, accept, false)
+	_ = c.send(pkt)
+}
+
 func (g *GroupInfo) FindMember(uin int64) *GroupMemberInfo {
 	for _, m := range g.Members {
 		f := m

client/decoders.go

@@ -543,6 +543,7 @@ func decodeSystemMsgGroupPacket(c *QQClient, _ uint16, payload []byte) (interfac
 					RequesterNick: st.Msg.ReqUinNick,
 					GroupCode:     st.Msg.GroupCode,
 					GroupName:     st.Msg.GroupName,
+					client:        c,
 				})
 			case 1: // 被邀请
 				c.dispatchGroupInvitedEvent(&GroupInvitedEvent{

client/entities.go

@@ -119,6 +119,8 @@ type (
 		RequesterNick string
 		GroupCode     int64
 		GroupName     string
+
+		client *QQClient
 	}
 
 	NewFriendRequest struct {
@@ -167,3 +169,11 @@ func (m *GroupMemberInfo) DisplayName() string {
 	}
 	return m.CardName
 }
+
+func (r *UserJoinGroupRequest) Accept() {
+	r.client.SolveGroupJoinRequest(r, true)
+}
+
+func (r *UserJoinGroupRequest) Reject() {
+	r.client.SolveGroupJoinRequest(r, false)
+}