/*
* method to remove this connection from everything called when the user
* leaves the server
*/
private void removeAllConnections() {
System.out.println("Client: " + username + " - " + "Removing from all connected rooms");
// removes the user from all connected chatrooms
for (ChatRoom c : connectedRooms.values()) c.removeUser(this);
// removes the user from the server
System.out.println("Client: " + username + " - " + "Removing from server listing");
users.remove(this);
return;
}
/*
* parses the input string and performs the appropriate action such as
* joining a room or saying a message
*
* @param String - the string to be parsed
*/
private String parseInput(String input) {
// sets up regex
String regex =
"(((disconnect)|(make)|(join)|(exit)) "
+ "\\p{Graph}+)|"
+ "(message \\p{Graph}+ \\p{Print}+)";
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(input);
// if there is no match for the input string
if (!m.matches()) return "Unrecognized Command " + input; // Should not occur assuming
// client input is correct
// find the first space in the string
int spaceIndex = input.indexOf(' ');
String command = input.substring(0, spaceIndex);
// if the string contains "disconnect", set alive to false and kill
// connection
if (command.trim().equals("disconnect")) {
// removeAllConnections();
this.alive = false;
return "disconnectedServerSent";
}
// if the command is to make, join or exit (it is a room command)
else if (command.equals("make") || command.equals("join") || command.equals("exit")) {
// find the next word in string and parse it as the room name
String roomName = input.substring(spaceIndex + 1);
// if making a new room
if (command.equals("make"))
try {
// make a new room
ChatRoom newChatRoom = new ChatRoom(roomName, rooms, this);
// Constructor above automatically adds the ChatRoom to the
// list of chat rooms of the server
connectedRooms.put(newChatRoom.name, newChatRoom);
informConnectedRooms();
return "";
} catch (IOException e) {
// if we cant make a room there will be an error message
return "invalidRoom " + roomName + " " + e.getMessage();
}
// if joining a new room
else if (command.equals("join")) {
// if there exists the room
if (rooms.contains(roomName))
try {
// try to join the room - what could happen is the room
// could dissapear at this stage, expect an IOException
ChatRoom roomToJoin = rooms.getRoomFromName(roomName);
roomToJoin.addUser(this);
this.connectedRooms.put(roomToJoin.name, roomToJoin);
return "";
// if something bad happened when joining a room
} catch (IOException e) {
return "invalidRoom " + roomName + " " + e.getMessage();
}
else return "invalidRoom " + roomName + " Room name does not exist";
// stuff for exiting a room
} else if (command.equals("exit")) {
// remove the room from personal listings
ChatRoom roomToExit = connectedRooms.remove(roomName);
if (roomToExit != null) {
// remove the user from the room
roomToExit.removeUser(this);
return "disconnectedRoom " + roomName;
}
return "invalidRoom " + roomName + " user not connected to room";
}
// stuff for messaging a specific room
} else if (command.equals("message")) {
// splice out the target chatroom and message
int secondSpaceIndex = input.indexOf(' ', spaceIndex + 1);
String chatroom = input.substring(spaceIndex + 1, secondSpaceIndex);
String message = input.substring(secondSpaceIndex + 1);
// update the queue of the chatroom
ChatRoom roomToMessage = connectedRooms.get(chatroom);
if (roomToMessage != null) {
roomToMessage.updateQueue(username + " " + message);
return "";
}
return "";
}
return "Unrecongnized Command " + input;
}