/// <summary>
/// Adds a message in the room
/// </summary>
/// <param name="strMsg"></param>
/// <param name="senderID"></param>
/// <param name="toUserID"></param>
/// <returns>All the messages sent from the other user from the last time the user sent a message</returns>
public string SendMessage(string strMsg,string senderID,string toUserID)
{
ChatUser user=this.GetUser(senderID);
Message msg=new Message(user.UserName ,strMsg,MsgType.Msg);
user.LastSeen=DateTime.Now;
this.ExpireUsers(100);
this.AddMsg(msg);
int lastMsgID;
ArrayList previousMsgs= this.GetMessagesSince( user.LastMessageReceived,out lastMsgID);
if (lastMsgID!=-1)
user.LastMessageReceived=lastMsgID;
string res=this.GenerateMessagesString(previousMsgs);
return res;
}
/// <summary>
/// Activates the user and adds a join message to the room
/// </summary>
/// <param name="userID"></param>
/// <param name="userName"></param>
/// <returns>All the messages sent in the room</returns>
public string JoinRoom(string userID,string userName)
{
//activate user
ChatUser user=this.GetUser(userID);
user.IsActive=true;
user.UserName=userName;
user.LastSeen=DateTime.Now;
//Add join message
Message msg=new Message(user.UserName ,"",MsgType.Join);
this.AddMsg(msg);
//Get all the messages to the user
int lastMsgID;
ArrayList previousMessages=this.GetMessagesSince(-1,out lastMsgID);
user.LastMessageReceived=lastMsgID;
//return the messages to the user
string str=GenerateMessagesString(previousMessages);
return str;
}
//
/// <summary>
/// Marks the user as inactive
/// </summary>
/// <param name="userID"></param>
/// <returns></returns>
public string LeaveRoom(string userID)
{
//deactivate user
ChatUser user=this.GetUser(userID);
user.IsActive=false;
user.LastSeen=DateTime.Now;
//Add leaving message
Message msg = new Message(user.UserName ,"",MsgType.Left);
this.AddMsg(msg);
//Get all the messages to the user
int lastMsgID;
ArrayList previousMsgs= this.GetMessagesSince( user.LastMessageReceived,out lastMsgID);
user.LastMessageReceived=lastMsgID;
//return the messages to the user
string str=GenerateMessagesString(previousMsgs);
if (IsEmpty())
ChatEngine.DeleteRoom(this.RoomID);
return "";
}
/// <summary>
/// Adds a message to the room
/// <param name="msg"></param>
/// <returns> the id of the new message</returns>
public int AddMsg(Message msg)
{
int count;
lock(messages)
{
count = messages.Count;
messages.Add(msg);
}
return count;
}
