//使两个用户成为好友
private void MakeFriend(string sender, string receiver)
{
//更新服务端发送请求用户的信息
OnlineUser currentUser = onlineUsers[sender] as OnlineUser;
currentUser.FriendNames.Add(receiver);
//对于接收方，若在线则立刻更新服务端
if (onlineUsers.Contains(receiver))
{
currentUser = onlineUsers[receiver] as OnlineUser;
currentUser.FriendNames.Add(sender);
}
//更新数据库
database.MakeFriends(sender, receiver);
//向接收方发送消息在本方法外完成
}
//发送在线好友列表
private void SendOnlineFriendList(MessageReceivedEventArgs e, string userName)
{
//格式ONLINELIST|time|SERVER|username1|username2|...
//注意为空的情况
StringBuilder sb = new StringBuilder();
OnlineUser currentUser = onlineUsers[userName] as OnlineUser;
if (currentUser.FriendNames.Count != 0)
{
foreach (string friendName in currentUser.FriendNames)
{
if (onlineUsers.Contains(friendName))
{
sb.AppendFormat("{0}|", friendName);
//发送上线信息，格式为JOIN|time|username
Message msgToFriend = new Message(MessageType.JOIN, userName, string.Empty);
FowardTo(e, friendName, msgToFriend);
}
}
string content = sb.ToString();
Message newMessage = new Message(MessageType.ONLINELIST, "SERVER", content);
FowardTo(e, userName, newMessage);
}
}
private void ProcessMessage(object sender, MessageReceivedEventArgs e)
{
string originalString = e.Content;
//从string获取Message
Message msg = GenerateMessage(originalString);
//注册
if (msg.Type == MessageType.REGISTER)
{
//数据库中有此用户，注册失败
if (database.ContainsUser(msg.Sender))
{
RespondInvalid(e);
}
//数据库中无此用户，注册成功
else
{
RespondOK(e);
AddUserToDatabase(database, msg.Content);
}
}
//登录
else if (msg.Type == MessageType.LOGIN)
{
string userName = msg.Sender;
string password = msg.Content;
if (CheckIdentity(userName, password) && !onlineUsers.Contains(userName))
{
//回应ok
RespondOK(e);
//将用户加入在线用户表
ServerUser fetchedServerUser = database.GetUser(userName);
OnlineUser newOnlineUser = new OnlineUser(fetchedServerUser, e.StreamToRemote);
onlineUsers.Add(userName, newOnlineUser);
//发送用户好友列表
SendFriendList(e, userName);
Thread.Sleep(100);
//发送用户群聊列表
SendGroupChatList(e, userName);
//发送用户在线好友列表，发送给在线好友JOIN信息
//SendOnlineFriendList(e, userName);
Thread.Sleep(200);
//发送用户离线时收到的信息
SendOfflineMessage(e, userName);
//触发在线用户改变事件
if (OnlineUserChanged != null)
{
OnlineUserChanged(this, new OnlineUserChangedEventArgs(newOnlineUser.UserName, "online"));
}
}
else
{
RespondInvalid(e);
}
}
//查询好友
else if (msg.Type == MessageType.FRIENDSEARCH)
{
string[] keyWords = msg.Content.Split(new char[] { '|' });
string userName = keyWords[0];
string nickName = keyWords[1];
string gender = keyWords[2]; //注意此处gender为string以方便查询
int age = -1;
if (keyWords[3].Trim().ToLower() != "unlimited")
{
age = int.Parse(keyWords[3].Trim());
}
List<ServerUser> usersFound = database.SearchUser(userName, nickName, gender, age);
if (usersFound.Count == 0)
{
Message newMessage = new Message(MessageType.FRIENDSEARCH, "SERVER", "empty");
FowardTo(e, msg.Sender, newMessage);
}
else
{
StringBuilder sb = new StringBuilder();
foreach (ServerUser userFound in usersFound)
{
string newUserName = userFound.UserName;
string newNickName = userFound.NickName;
string newGender = userFound.Gender.ToString();
string newAge = userFound.Age.ToString();
string newEmail = userFound.Email;
sb.AppendFormat("{0}|{1}|{2}|{3}|{4}|", newUserName, newNickName,
newGender, newAge, newEmail);
}
string newContent = sb.ToString();
Message newMessage = new Message(MessageType.FRIENDSEARCH, "SERVER", newContent);
FowardTo(e, msg.Sender, newMessage);
}
}
//私聊，转发给目标用户，写入总聊天记录
else if (msg.Type == MessageType.PRIV)
{
bool IsSuccess = FowardTo(e, msg.Receiver, msg);
if (IsSuccess)
{
database.AddMessage(msg);
RespondOK(e);
}
else
{
RespondInvalid(e);
}
}
//群聊，获取群信息，写入总聊天记录，转发给目标用户
else if (msg.Type == MessageType.GROUP)
{
int chatNumber = int.Parse(msg.Receiver);
ServerChat targetChat = database.GetChat(chatNumber);
foreach (string userName in targetChat.ChatUserNames)
{
if (userName != msg.Sender)
{
try
{
FowardTo(e, userName, msg);
}
catch
{
RespondInvalid(e);
}
}
}
database.AddMessage(msg);
RespondOK(e);
}
//用户离线
else if (msg.Type == MessageType.LEAVE)
{
string userName = msg.Sender;
OnlineUser currentUser = onlineUsers[userName] as OnlineUser;
//向在线好友发送离线消息
foreach (string friendName in currentUser.FriendNames)
{
if (onlineUsers.Contains(friendName))
{
FowardTo(e, friendName, msg);
}
}
//触发在线用户改变事件
if (OnlineUserChanged != null)
{
OnlineUserChanged(this,
new OnlineUserChangedEventArgs(onlineUsers[userName] as OnlineUser, "offline"));
}
//是否要在此关闭用户连接？
//将用户移出在线用户列表
onlineUsers.Remove(userName);
}
//好友申请消息
else if (msg.Type == MessageType.FRIENDREQUEST)
{
MakeFriend(msg.Sender, msg.Receiver);
bool IsSuccess = FowardTo(e, msg.Receiver, msg);
if (IsSuccess)
{
database.AddMessage(msg);
RespondOK(e);
}
else
{
RespondInvalid(e);
}
}
//创建群聊
else if (msg.Type == MessageType.CREATECHAT)
{
ServerChat newChat = new ServerChat(msg.Receiver);
string[] tokens = msg.Content.Split(new char[] { '|' });
foreach (string token in tokens)
{
if (!string.IsNullOrEmpty(token))
{
newChat.AddUserName(token.Trim());
}
}
//在数据库中创建群聊
try
{
database.AddChat(newChat);
}
catch
{
RespondInvalid(e);
}
//将信息转发给群聊参与者
StringBuilder sb = new StringBuilder();
sb.AppendFormat("{0}|", newChat.ChatNumber.ToString());
sb.AppendFormat("{0}|", newChat.ChatName);
foreach (var user in newChat.ChatUserNames)
{
sb.AppendFormat("{0}|", user);
}
Message msgToClient = new Message(MessageType.CREATECHAT, msg.SendTime,
msg.Sender, sb.ToString());
bool IsSuccess = true;
foreach (string userName in newChat.ChatUserNames)
{
IsSuccess = FowardTo(e, userName, msgToClient);
}
//回应
if (IsSuccess)
{
RespondOK(e);
}
else
{
RespondOK(e);
}
}
//离开群聊
else if (msg.Type == MessageType.LEAVECHAT)
{
int chatNumber = int.Parse(msg.Content);
string userName = msg.Sender;
//在数据库中更新群聊信息
try
{
database.DeleteChatUser(chatNumber, userName);
}
catch
{
RespondInvalid(e);
}
//向群聊者推送离开信息
ServerChat currentChat = database.GetChat(chatNumber);
bool IsSuccess = true;
foreach (string name in currentChat.ChatUserNames)
{
if (name != userName)
{
IsSuccess = FowardTo(e, name, msg);
}
}
if (IsSuccess)
{
RespondOK(e);
}
else
{
RespondOK(e);
}
}
}
private void ProcessMessage(object sender, MessageReceivedEventArgs e)
{
string originalString = e.Content;
//从string获取Message
Message msg = GenerateMessage(originalString);
//注册
if (msg.Type == MessageType.REGISTER)
{
//数据库中有此用户，注册失败
if (database.ContainsUser(msg.Sender))
{
RespondInvalid(e);
}
//数据库中无此用户，注册成功
else
{
RespondOK(e);
AddUserToDatabase(database, msg.Content);
}
}
//登录
else if (msg.Type == MessageType.LOGIN)
{
string userName = msg.Sender;
string password = msg.Content;
if (CheckIdentity(userName, password) && !onlineUsers.Contains(userName))
{
//回应ok
RespondOK(e);
//将用户加入在线用户表
ServerUser fetchedServerUser = database.GetUser(userName);
OnlineUser newOnlineUser = new OnlineUser(fetchedServerUser, e.StreamToRemote);
onlineUsers.Add(userName, newOnlineUser);
//发送用户好友列表
SendFriendList(e, userName);
Thread.Sleep(100);
//发送用户群聊列表
SendGroupChatList(e, userName);
//发送用户在线好友列表，发送给在线好友JOIN信息
//SendOnlineFriendList(e, userName);
Thread.Sleep(200);
//发送用户离线时收到的信息
SendOfflineMessage(e, userName);
//触发在线用户改变事件
if (OnlineUserChanged != null)
{
OnlineUserChanged(this, new OnlineUserChangedEventArgs(newOnlineUser.UserName, "online"));
}
}
else
{
RespondInvalid(e);
}
}
//查询好友
else if (msg.Type == MessageType.FRIENDSEARCH)
{
string[] keyWords = msg.Content.Split(new char[] { '|' });
string userName = keyWords[0];
string nickName = keyWords[1];
string gender = keyWords[2]; //注意此处gender为string以方便查询
int age = -1;
if (keyWords[3].Trim().ToLower() != "unlimited")
{
age = int.Parse(keyWords[3].Trim());
}
List <ServerUser> usersFound = database.SearchUser(userName, nickName, gender, age);
if (usersFound.Count == 0)
{
Message newMessage = new Message(MessageType.FRIENDSEARCH, "SERVER", "empty");
FowardTo(e, msg.Sender, newMessage);
}
else
{
StringBuilder sb = new StringBuilder();
foreach (ServerUser userFound in usersFound)
{
string newUserName = userFound.UserName;
string newNickName = userFound.NickName;
string newGender = userFound.Gender.ToString();
string newAge = userFound.Age.ToString();
string newEmail = userFound.Email;
sb.AppendFormat("{0}|{1}|{2}|{3}|{4}|", newUserName, newNickName,
newGender, newAge, newEmail);
}
string newContent = sb.ToString();
Message newMessage = new Message(MessageType.FRIENDSEARCH, "SERVER", newContent);
FowardTo(e, msg.Sender, newMessage);
}
}
//私聊，转发给目标用户，写入总聊天记录
else if (msg.Type == MessageType.PRIV)
{
bool IsSuccess = FowardTo(e, msg.Receiver, msg);
if (IsSuccess)
{
database.AddMessage(msg);
RespondOK(e);
}
else
{
RespondInvalid(e);
}
}
//群聊，获取群信息，写入总聊天记录，转发给目标用户
else if (msg.Type == MessageType.GROUP)
{
int chatNumber = int.Parse(msg.Receiver);
ServerChat targetChat = database.GetChat(chatNumber);
foreach (string userName in targetChat.ChatUserNames)
{
if (userName != msg.Sender)
{
try
{
FowardTo(e, userName, msg);
}
catch
{
RespondInvalid(e);
}
}
}
database.AddMessage(msg);
RespondOK(e);
}
//用户离线
else if (msg.Type == MessageType.LEAVE)
{
string userName = msg.Sender;
OnlineUser currentUser = onlineUsers[userName] as OnlineUser;
//向在线好友发送离线消息
foreach (string friendName in currentUser.FriendNames)
{
if (onlineUsers.Contains(friendName))
{
FowardTo(e, friendName, msg);
}
}
//触发在线用户改变事件
if (OnlineUserChanged != null)
{
OnlineUserChanged(this,
new OnlineUserChangedEventArgs(onlineUsers[userName] as OnlineUser, "offline"));
}
//是否要在此关闭用户连接？
//将用户移出在线用户列表
onlineUsers.Remove(userName);
}
//好友申请消息
else if (msg.Type == MessageType.FRIENDREQUEST)
{
MakeFriend(msg.Sender, msg.Receiver);
bool IsSuccess = FowardTo(e, msg.Receiver, msg);
if (IsSuccess)
{
database.AddMessage(msg);
RespondOK(e);
}
else
{
RespondInvalid(e);
}
}
//创建群聊
else if (msg.Type == MessageType.CREATECHAT)
{
ServerChat newChat = new ServerChat(msg.Receiver);
string[] tokens = msg.Content.Split(new char[] { '|' });
foreach (string token in tokens)
{
if (!string.IsNullOrEmpty(token))
{
newChat.AddUserName(token.Trim());
}
}
//在数据库中创建群聊
try
{
database.AddChat(newChat);
}
catch
{
RespondInvalid(e);
}
//将信息转发给群聊参与者
StringBuilder sb = new StringBuilder();
sb.AppendFormat("{0}|", newChat.ChatNumber.ToString());
sb.AppendFormat("{0}|", newChat.ChatName);
foreach (var user in newChat.ChatUserNames)
{
sb.AppendFormat("{0}|", user);
}
Message msgToClient = new Message(MessageType.CREATECHAT, msg.SendTime,
msg.Sender, sb.ToString());
bool IsSuccess = true;
foreach (string userName in newChat.ChatUserNames)
{
IsSuccess = FowardTo(e, userName, msgToClient);
}
//回应
if (IsSuccess)
{
RespondOK(e);
}
else
{
RespondOK(e);
}
}
//离开群聊
else if (msg.Type == MessageType.LEAVECHAT)
{
int chatNumber = int.Parse(msg.Content);
string userName = msg.Sender;
//在数据库中更新群聊信息
try
{
database.DeleteChatUser(chatNumber, userName);
}
catch
{
RespondInvalid(e);
}
//向群聊者推送离开信息
ServerChat currentChat = database.GetChat(chatNumber);
bool IsSuccess = true;
foreach (string name in currentChat.ChatUserNames)
{
if (name != userName)
{
IsSuccess = FowardTo(e, name, msg);
}
}
if (IsSuccess)
{
RespondOK(e);
}
else
{
RespondOK(e);
}
}
}