幼麟棋牌進入房間邏輯分析

1.首先進入房間有四種途徑

a.進入大廳界面的時候查看是個有oldRoomId，如果有直接進入對應房間

b.大廳界面update方法裏看是否有cc.vv.userMgr.roomData，如果有直接進入對應房間

c.根據房間號輸入對應房間的時候，如果正確，則進入房間

d.用戶斷線重連的時候，如果房間號存在，則直接進入房間

2.接下來就是進入房間實際操作

    enterRoom:function(roomId,callback){
        var self = this;
        var onEnter = function(ret){
            if(ret.errcode !== 0){
                if(ret.errcode == -1){
                    setTimeout(function(){
                        self.enterRoom(roomId,callback);
                    },5000);
                }
                else{
                    cc.vv.wc.hide();
                    if(callback != null){
                        callback(ret);
                    }
                }
            }
            else{
                cc.vv.wc.hide();
                if(callback != null){
                    callback(ret);
                }
                cc.vv.gameNetMgr.connectGameServer(ret);
            }
        };
        
        var data = {
            account:cc.vv.userMgr.account,
            sign:cc.vv.userMgr.sign,
            roomid:roomId
        };
        cc.vv.wc.show("正在進入房間 " + roomId);
        cc.vv.http.sendRequest("/enter_private_room",data,onEnter);
    },

跳轉到client_server的對應方法處

app.get('/enter_private_room',function(req,res){
	var data = req.query;
	var roomId = data.roomid;
	if(roomId == null){
		http.send(res,-1,"parameters don't match api requirements.");
		return;
	}
	if(!check_account(req,res)){
		return;
	}

	var account = data.account;

	db.get_user_data(account,function(data){
		if(data == null){
			http.send(res,-1,"system error");
			return;
		}
		var userId = data.userid;
		var name = data.name;

		//驗證玩家狀態
		//todo
		//進入房間
		room_service.enterRoom(userId,name,roomId,function(errcode,enterInfo){
			if(enterInfo){
				var ret = {
					roomid:roomId,
					ip:enterInfo.ip,
					port:enterInfo.port,
					token:enterInfo.token,
					time:Date.now()
				};
				ret.sign = crypto.md5(roomId + ret.token + ret.time + config.ROOM_PRI_KEY);
				http.send(res,0,"ok",ret);
			}
			else{
				http.send(res,errcode,"enter room failed.");
			}
		});
	});
});

第一步驗證賬號，接着獲取用戶uid和暱稱，執行room_server的enterRoom方法

exports.enterRoom = function(userId,name,roomId,fnCallback){
	var reqdata = {
		userid:userId,
		name:name,
		roomid:roomId
	};
	reqdata.sign = crypto.md5(userId + name + roomId + config.ROOM_PRI_KEY);

	var checkRoomIsRuning = function(serverinfo,roomId,callback){
		var sign = crypto.md5(roomId + config.ROOM_PRI_KEY);
		http.get(serverinfo.ip,serverinfo.httpPort,"/is_room_runing",{roomid:roomId,sign:sign},function(ret,data){
			if(ret){
				if(data.errcode == 0 && data.runing == true){
					callback(true);
				}
				else{
					callback(false);
				}
			}
			else{
				callback(false);
			}
		});
	}

	var enterRoomReq = function(serverinfo){
		http.get(serverinfo.ip,serverinfo.httpPort,"/enter_room",reqdata,function(ret,data){
			console.log(data);
			if(ret){
				if(data.errcode == 0){
					db.set_room_id_of_user(userId,roomId,function(ret){
						fnCallback(0,{
							ip:serverinfo.clientip,
							port:serverinfo.clientport,
							token:data.token
						});
					});
				}
				else{
					console.log(data.errmsg);
					fnCallback(data.errcode,null);
				}
			}
			else{
				fnCallback(-1,null);
			}
		});
	};

	var chooseServerAndEnter = function(serverinfo){
		serverinfo = chooseServer();
		if(serverinfo != null){
			enterRoomReq(serverinfo);
		}
		else{
			fnCallback(-1,null);					
		}
	}

	db.get_room_addr(roomId,function(ret,ip,port){
		if(ret){
			var id = ip + ":" + port;
			var serverinfo = serverMap[id];
			if(serverinfo != null){
				checkRoomIsRuning(serverinfo,roomId,function(isRuning){
					if(isRuning){
						enterRoomReq(serverinfo);
					}
					else{
						chooseServerAndEnter(serverinfo);
					}
				});
			}
			else{
				chooseServerAndEnter(serverinfo);
			}
		}
		else{
			fnCallback(-2,null);
		}
	});
};

這兒首先根據房間號查詢了房間信息，包括對應的遊戲服務器ip和端口，如果服務器存在，查看房間是否正在運行，如果在運行，執行進入房間的請求，否則，選擇一個合適的服務器，然後執行進入房間請求

時間進入房間的操作在遊戲服務器的http_server裏面

app.get('/enter_room',function(req,res){
	var userId = parseInt(req.query.userid);
	var name = req.query.name;
	var roomId = req.query.roomid;
	var sign = req.query.sign;
	if(userId == null || roomId == null || sign == null){
		http.send(res,1,"invalid parameters");
		return;
	}

	var md5 = crypto.md5(userId + name + roomId + config.ROOM_PRI_KEY);
	console.log(req.query);
	console.log(md5);
	if(md5 != sign){
		http.send(res,2,"sign check failed.");
		return;
	}

	//安排玩家坐下
	roomMgr.enterRoom(roomId,userId,name,function(ret){
		if(ret != 0){
			if(ret == 1){
				http.send(res,4,"room is full.");
			}
			else if(ret == 2){
				http.send(res,3,"can't find room.");
			}	
			return;		
		}

		var token = tokenMgr.createToken(userId,5000);
		http.send(res,0,"ok",{token:token});
	});
});

老一套的參數檢查，最後調用roomMgr.enterRoom操作數據庫

exports.enterRoom = function(roomId,userId,userName,callback){
	var fnTakeSeat = function(room){
		if(exports.getUserRoom(userId) == roomId){
			//已存在
			return 0;
		}

		for(var i = 0; i < 4; ++i){
			var seat = room.seats[i];
			if(seat.userId <= 0){
				seat.userId = userId;
				seat.name = userName;
				userLocation[userId] = {
					roomId:roomId,
					seatIndex:i
				};
				//console.log(userLocation[userId]);
				db.update_seat_info(roomId,i,seat.userId,"",seat.name);
				//正常
				return 0;
			}
		}	
		//房間已滿
		return 1;	
	}
	var room = rooms[roomId];
	if(room){
		var ret = fnTakeSeat(room);
		callback(ret);
	}
	else{
		db.get_room_data(roomId,function(dbdata){
			if(dbdata == null){
				//找不到房間
				callback(2);
			}
			else{
				//construct room.
				room = constructRoomFromDb(dbdata);
				//
				var ret = fnTakeSeat(room);
				callback(ret);
			}
		});
	}
};

首先查看房間是否存在，如果存在，則takeSeat，否則，根據房間號查找數據庫 ，然後根據數據庫信息創建房間，增加房間數等

下面看看takeSeat的邏輯

	var fnTakeSeat = function(room){
		if(exports.getUserRoom(userId) == roomId){
			//已存在
			return 0;
		}

		for(var i = 0; i < 4; ++i){
			var seat = room.seats[i];
			if(seat.userId <= 0){
				seat.userId = userId;
				seat.name = userName;
				userLocation[userId] = {
					roomId:roomId,
					seatIndex:i
				};
				//console.log(userLocation[userId]);
				db.update_seat_info(roomId,i,seat.userId,"",seat.name);
				//正常
				return 0;
			}
		}	
		//房間已滿
		return 1;	
	}

如果房間存在，則返回

，然後遍歷四個座位，如果某一座位爲空，則更新數據庫信息，然後返回，否則，就是房間滿了