consolechat-server/src-server/Server.java

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Java
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import java.net.*;
import java.io.*;
import java.util.*;
/**
* @author Nicolás A. Ortega
* @license GNU GPLv3
* @year 2014
*
* For details on the copyright, look at the COPYRIGHT file that came with
* this program.
*
*/
public class Server implements Runnable {
private String version = "v1.0";
private ArrayList<ServerThread> clients = new ArrayList<ServerThread>();
private ServerSocket sSocket = null;
private Thread thread = null;
private int clientCount = 0;
private String passwd = "admin";
public static void main(String[] args) {
if(args.length != 1) {
System.out.println("You are using the program incorrectly.");
} else {
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new Server(Integer.parseInt(args[0]));
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}
}
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// The constructor method
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public Server(int port) {
System.out.println("ConsoleChat server " + version + " Copyright (C) 2014 Nicolás A. Ortega\n" +
"This program comes with ABSOLUTELY NO WARRANTY; details in WARRANTY file.\n" +
"This is free software, and you are welcome to redistribute it\n" +
"under certain conditions; details in LICENSE file.\n");
try {
System.out.println("Binding to port " + port + "...");
// Try to open a port on the specified port number
sSocket = new ServerSocket(port);
System.out.println("Server started: " + sSocket);
start();
} catch(IOException e) {
System.out.println(e);
}
}
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// The run method that will be called every frame
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public void run() {
while(thread != null) {
try {
System.out.println("Waiting for clients...");
addThread(sSocket.accept());
} catch(IOException e) {
System.out.println("Acceptance error: " + e);
stop();
}
}
}
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// Start the server thread
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public void start() {
if(thread == null) {
thread = new Thread(this);
thread.start();
}
}
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// Stop the server thread and all other threads
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public void stop() {
if(thread != null) {
thread.interrupt();
thread = null;
}
for(int i = 0; i < clients.size(); i++) {
try {
clients.get(i).close();
} catch(IOException e) {
System.out.println("Error closing thread: " + e);
}
}
}
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// This function loops through all the clients and returns the one with the ID entered
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public int findClient(int id) {
for(int i = 0; i < clientCount; i++) {
if(clients.get(i).getID() == id) {
return i;
}
}
return -1;
}
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// Handle any messages the server recieves
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public synchronized void handle(int id, String username, String input) {
if(input.startsWith("/")) {
if(input.equals("/quit")) {
clients.get(findClient(id)).send("/quit");
remove(id);
} else if(input.equals("/serverVersion")) {
clients.get(findClient(id)).send(version);
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} else if(input.equals("/list")) {
int pos = findClient(id);
for(int i = 0; i < clients.size(); i++) {
String list = Integer.toString(clients.get(i).getID()) + " - " + clients.get(i).getUsername() + " |";
if(pos == i) { list += " (you)"; }
if(clients.get(i).isAdmin()) { list += " (admin)"; }
clients.get(pos).send(list);
}
clients.get(pos).send("\n");
} else if(input.substring(0, 3).equals("/pm")) {
int pos = findClient(Integer.parseInt(input.substring(4, 9)));
clients.get(pos).send("<" + username + ">: " + input.substring(10));
} else if(input.length() > 12 && input.substring(0, 5).equals("/kick")) {
if(clients.get(findClient(id)).isAdmin()) {
int kID = Integer.parseInt(input.substring(6, 11));
String reason = input.substring(12);
clients.get(findClient(kID)).send("Kick: " + reason);
remove(kID);
} else {
clients.get(findClient(id)).send("You are not admin.");
}
} else if(input.length() > 10 && input.substring(0, 10).equals("/giveadmin")) {
if(clients.get(findClient(id)).isAdmin()) {
int aID = Integer.parseInt(input.substring(11));
clients.get(findClient(aID)).setAdmin(true);
clients.get(findClient(aID)).send("You have been made admin.\n");
} else {
clients.get(findClient(id)).send("You are not admin.");
}
} else {
clients.get(findClient(id)).runCommand(input);
}
} else {
for(int i = 0; i < clientCount; i++) {
if(clients.get(i).getID() != id) {
clients.get(i).send(username + ": " + input);
}
}
}
}
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// Remove a client
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public synchronized void remove(int id) {
int pos = findClient(id);
if(pos >= 0) {
ServerThread toTerminate = clients.get(pos);
System.out.println("Remove client thread: " + id + " at " + pos);
try {
clients.get(pos).close();
} catch(IOException e) {
System.out.println("Error closing thread: " + e);
}
clients.remove(pos);
clientCount--;
try {
toTerminate.close();
} catch(IOException e) {
System.out.println("Error closing thread: " + e);
}
toTerminate.interrupt();
}
}
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// Add a new client
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public void addThread(Socket socket) {
clients.add(new ServerThread(this, socket));
try {
clients.get(clientCount).open();
clients.get(clientCount).start();
clientCount++;
} catch(IOException e) {
System.out.println("Error opening thread: " + e);
}
}
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// Getter methods
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public String getPasswd() { return passwd; }
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// Setter methods
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public void setPasswd(String npasswd) { this.passwd = npasswd; }
}