Java-web-chat-app/ClientHandler.java at main · ajay3568yadav/Java-web-chat-app · GitHub

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import java.io.*;
import java.net.Socket;
import java.util.ArrayList;

public class ClientHandler implements Runnable {

    public static ArrayList<ClientHandler> clientHandlers = new ArrayList<>();
    private Socket socket;
    private BufferedReader bufferedReader;
    private BufferedWriter bufferedWriter;
    private String clientUsername;

    public String getClientUsername()
    {
        return clientUsername;
    }
    public ClientHandler(Socket socket) {
        try {
            this.socket = socket;
            this.bufferedWriter = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
            this.bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));

            this.clientUsername = bufferedReader.readLine();
            clientHandlers.add(this);
            broadcastMessage("SERVER: " + clientUsername + " has entered the chat!");

        } catch (IOException e) {
            closeEverything(socket, bufferedReader, bufferedWriter);
        }
    }


    @Override
    public void run()
    {
        String messageFromClient;

        while(socket.isConnected()){
            try{
                messageFromClient=bufferedReader.readLine();

                if(messageFromClient.contains("\\list"))
                {
                    messageFromClient="List: " + Server.getUsersList();
                    broadcastMessage(messageFromClient,true);
                }
                else {
                    broadcastMessage(messageFromClient);
                }


            }catch (IOException e){
                closeEverything(socket, bufferedReader,bufferedWriter);
                break;
            }
        }
    }
    public void broadcastMessage(String messageToSend){
        for(ClientHandler clientHandler:clientHandlers){
            try{
                if(!clientHandler.clientUsername.equals(clientUsername))
                {
                    clientHandler.bufferedWriter.write(messageToSend);
                    clientHandler.bufferedWriter.newLine();
                    clientHandler.bufferedWriter.flush();
                }

            }catch (IOException e){
                closeEverything(socket,bufferedReader,bufferedWriter);
            }
        }
    }
    public void broadcastMessage(String messageToSend,boolean a){
        for(ClientHandler clientHandler:clientHandlers){
            try{
                if(clientHandler.clientUsername.equals(clientUsername))
                {
                    clientHandler.bufferedWriter.write(messageToSend);
                    clientHandler.bufferedWriter.newLine();
                    clientHandler.bufferedWriter.flush();
                }

            }catch (IOException e){
                closeEverything(socket,bufferedReader,bufferedWriter);
            }
        }
    }

    public void removeClientHandler(){
        clientHandlers.remove(this);
        broadcastMessage("SERVER: "+clientUsername+" has left the chat!");
    }
    public void closeEverything(Socket socket,BufferedReader bufferedReader,BufferedWriter bufferedWriter){
        removeClientHandler();
        try {
            if(bufferedReader!=null){
                bufferedReader.close();
            }
            if(bufferedWriter!=null){
                bufferedWriter.close();
            }
            if(socket!=null){
                socket.close();
            }
        }catch (IOException e){
            e.printStackTrace();
        }
    }

}