refactor: lower the level of code nesting (#1396)

Signed-off-by: rfyiamcool <rfyiamcool@163.com>

internal/msggateway/hub_server.go

@@ -17,22 +17,19 @@ package msggateway
 import (
 	"context"
 
-	"github.com/OpenIMSDK/tools/mcontext"
-
-	"github.com/openimsdk/open-im-server/v3/pkg/authverify"
-
-	"github.com/OpenIMSDK/tools/errs"
 	"google.golang.org/grpc"
 
-	"github.com/openimsdk/open-im-server/v3/pkg/common/db/cache"
-
 	"github.com/OpenIMSDK/protocol/constant"
 	"github.com/OpenIMSDK/protocol/msggateway"
 	"github.com/OpenIMSDK/tools/discoveryregistry"
+	"github.com/OpenIMSDK/tools/errs"
 	"github.com/OpenIMSDK/tools/log"
+	"github.com/OpenIMSDK/tools/mcontext"
 	"github.com/OpenIMSDK/tools/utils"
 
+	"github.com/openimsdk/open-im-server/v3/pkg/authverify"
 	"github.com/openimsdk/open-im-server/v3/pkg/common/config"
+	"github.com/openimsdk/open-im-server/v3/pkg/common/db/cache"
 	"github.com/openimsdk/open-im-server/v3/pkg/common/startrpc"
 )
 
@@ -41,6 +38,7 @@ func (s *Server) InitServer(disCov discoveryregistry.SvcDiscoveryRegistry, serve
 	if err != nil {
 		return err
 	}
+
 	msgModel := cache.NewMsgCacheModel(rdb)
 	s.LongConnServer.SetDiscoveryRegistry(disCov)
 	s.LongConnServer.SetCacheHandler(msgModel)
@@ -97,22 +95,25 @@ func (s *Server) GetUsersOnlineStatus(
 		if !ok {
 			continue
 		}
-		temp := new(msggateway.GetUsersOnlineStatusResp_SuccessResult)
-		temp.UserID = userID
+
+		uresp := new(msggateway.GetUsersOnlineStatusResp_SuccessResult)
+		uresp.UserID = userID
 		for _, client := range clients {
-			if client != nil {
+			if client == nil {
+				continue
+			}
+
 			ps := new(msggateway.GetUsersOnlineStatusResp_SuccessDetail)
 			ps.Platform = constant.PlatformIDToName(client.PlatformID)
 			ps.Status = constant.OnlineStatus
 			ps.ConnID = client.ctx.GetConnID()
 			ps.Token = client.token
 			ps.IsBackground = client.IsBackground
-				temp.Status = constant.OnlineStatus
-				temp.DetailPlatformStatus = append(temp.DetailPlatformStatus, ps)
-			}
+			uresp.Status = constant.OnlineStatus
+			uresp.DetailPlatformStatus = append(uresp.DetailPlatformStatus, ps)
 		}
-		if temp.Status == constant.OnlineStatus {
-			resp.SuccessResult = append(resp.SuccessResult, temp)
+		if uresp.Status == constant.OnlineStatus {
+			resp.SuccessResult = append(resp.SuccessResult, uresp)
 		}
 	}
 	return &resp, nil
@@ -129,50 +130,55 @@ func (s *Server) SuperGroupOnlineBatchPushOneMsg(
 	ctx context.Context,
 	req *msggateway.OnlineBatchPushOneMsgReq,
 ) (*msggateway.OnlineBatchPushOneMsgResp, error) {
-	var singleUserResult []*msggateway.SingleMsgToUserResults
+
+	var singleUserResults []*msggateway.SingleMsgToUserResults
+
 	for _, v := range req.PushToUserIDs {
 		var resp []*msggateway.SingleMsgToUserPlatform
-		tempT := &msggateway.SingleMsgToUserResults{
+		results := &msggateway.SingleMsgToUserResults{
 			UserID: v,
 		}
 		clients, ok := s.LongConnServer.GetUserAllCons(v)
 		if !ok {
 			log.ZDebug(ctx, "push user not online", "userID", v)
-			tempT.Resp = resp
-			singleUserResult = append(singleUserResult, tempT)
+			results.Resp = resp
+			singleUserResults = append(singleUserResults, results)
 			continue
 		}
+
 		log.ZDebug(ctx, "push user online", "clients", clients, "userID", v)
 		for _, client := range clients {
-			if client != nil {
-				temp := &msggateway.SingleMsgToUserPlatform{
+			if client == nil {
+				continue
+			}
+
+			userPlatform := &msggateway.SingleMsgToUserPlatform{
 				RecvID:         v,
 				RecvPlatFormID: int32(client.PlatformID),
 			}
 			if !client.IsBackground ||
-					(client.IsBackground == true && client.PlatformID != constant.IOSPlatformID) {
+				(client.IsBackground && client.PlatformID != constant.IOSPlatformID) {
 				err := client.PushMessage(ctx, req.MsgData)
 				if err != nil {
-						temp.ResultCode = -2
-						resp = append(resp, temp)
+					userPlatform.ResultCode = -2
+					resp = append(resp, userPlatform)
 				} else {
 					if utils.IsContainInt(client.PlatformID, s.pushTerminal) {
-							tempT.OnlinePush = true
-							resp = append(resp, temp)
+						results.OnlinePush = true
+						resp = append(resp, userPlatform)
 					}
 				}
 			} else {
-					temp.ResultCode = -3
-					resp = append(resp, temp)
-				}
+				userPlatform.ResultCode = -3
+				resp = append(resp, userPlatform)
 			}
 		}
-		tempT.Resp = resp
-		singleUserResult = append(singleUserResult, tempT)
+		results.Resp = resp
+		singleUserResults = append(singleUserResults, results)
 	}
 
 	return &msggateway.OnlineBatchPushOneMsgResp{
-		SinglePushResult: singleUserResult,
+		SinglePushResult: singleUserResults,
 	}, nil
 }
 
@@ -181,17 +187,21 @@ func (s *Server) KickUserOffline(
 	req *msggateway.KickUserOfflineReq,
 ) (*msggateway.KickUserOfflineResp, error) {
 	for _, v := range req.KickUserIDList {
-		if clients, _, ok := s.LongConnServer.GetUserPlatformCons(v, int(req.PlatformID)); ok {
+		clients, _, ok := s.LongConnServer.GetUserPlatformCons(v, int(req.PlatformID))
+		if !ok {
+			log.ZInfo(ctx, "conn not exist", "userID", v, "platformID", req.PlatformID)
+			continue
+		}
+
 		for _, client := range clients {
 			log.ZDebug(ctx, "kick user offline", "userID", v, "platformID", req.PlatformID, "client", client)
 			if err := client.longConnServer.KickUserConn(client); err != nil {
 				log.ZWarn(ctx, "kick user offline failed", err, "userID", v, "platformID", req.PlatformID)
 			}
 		}
-		} else {
-			log.ZInfo(ctx, "conn not exist", "userID", v, "platformID", req.PlatformID)
-		}
+		continue
 	}
+
 	return &msggateway.KickUserOfflineResp{}, nil
 }
 

internal/msggateway/n_ws_server.go

@@ -57,12 +57,6 @@ type LongConnServer interface {
 	MessageHandler
 }
 
-var bufferPool = sync.Pool{
-	New: func() interface{} {
-		return make([]byte, 1024)
-	},
-}
-
 type WsServer struct {
 	port              int
 	wsMaxConnNum      int64
@@ -374,7 +368,7 @@ func (ws *WsServer) unregisterClient(client *Client) {
 	}
 	ws.onlineUserConnNum.Add(-1)
 	ws.SetUserOnlineStatus(client.ctx, client, constant.Offline)
-	log.ZInfo(client.ctx, "user offline", "close reason", client.closedErr, "online user Num", ws.onlineUserNum, "online user conn Num",
+	log.ZInfo(client.ctx, "user offline", "close reason", client.closedErr, "online user Num", ws.onlineUserNum.Load(), "online user conn Num",
 		ws.onlineUserConnNum.Load(),
 	)
 }