Merge branch 'tuoyun' of github.com:OpenIMSDK/Open-IM-Server into tuoyun

internal/rpc/group/group.go

@@ -17,6 +17,7 @@ import (
 	pbUser "Open_IM/pkg/proto/user"
 	"Open_IM/pkg/utils"
 	"context"
+	"math/big"
 	"net"
 	"strconv"
 	"strings"
@@ -101,9 +102,13 @@ func (s *groupServer) CreateGroup(ctx context.Context, req *pbGroup.CreateGroupR
 
 	groupId := req.GroupInfo.GroupID
 	if groupId == "" {
-		groupId = utils.Md5(strconv.FormatInt(time.Now().UnixNano(), 10))
+		groupId = utils.Md5(req.OperationID + strconv.FormatInt(time.Now().UnixNano(), 10))
+		bi := big.NewInt(0)
+		bi.SetString(groupId[0:8], 16)
+		groupId = bi.String()
 	}
 	//to group
+
 	groupInfo := db.Group{}
 	utils.CopyStructFields(&groupInfo, req.GroupInfo)
 	groupInfo.CreatorUserID = req.OpUserID