From 7aa4e0dd006a1979abe91e2a3a03855bad766b68 Mon Sep 17 00:00:00 2001
From: jeffcheasey88 <66554203+jeffcheasey88@users.noreply.github.com>
Date: Fri, 7 Oct 2022 14:28:29 +0200
Subject: [PATCH] Initial Commit

---
 .gitignore                                    |   4 +
 src/be/jeffcheasey88/Client.java              | 185 ++++++++++++++++++
 src/be/jeffcheasey88/Main.java                |  59 ++++++
 src/be/jeffcheasey88/Pipeline.java            |  16 ++
 src/be/jeffcheasey88/Player.java              |  14 ++
 src/be/jeffcheasey88/PlayerRepository.java    |  24 +++
 src/be/jeffcheasey88/commands/Command.java    |  21 ++
 .../commands/CommandManager.java              |  41 ++++
 .../jeffcheasey88/commands/NameCommand.java   |  18 ++
 .../jeffcheasey88/commands/OtherCommand.java  |  26 +++
 10 files changed, 408 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 src/be/jeffcheasey88/Client.java
 create mode 100644 src/be/jeffcheasey88/Main.java
 create mode 100644 src/be/jeffcheasey88/Pipeline.java
 create mode 100644 src/be/jeffcheasey88/Player.java
 create mode 100644 src/be/jeffcheasey88/PlayerRepository.java
 create mode 100644 src/be/jeffcheasey88/commands/Command.java
 create mode 100644 src/be/jeffcheasey88/commands/CommandManager.java
 create mode 100644 src/be/jeffcheasey88/commands/NameCommand.java
 create mode 100644 src/be/jeffcheasey88/commands/OtherCommand.java

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f004aaf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+.settings/
+/bin
+.classpath
+.project
\ No newline at end of file
diff --git a/src/be/jeffcheasey88/Client.java b/src/be/jeffcheasey88/Client.java
new file mode 100644
index 0000000..8b7ddfa
--- /dev/null
+++ b/src/be/jeffcheasey88/Client.java
@@ -0,0 +1,185 @@
+package be.jeffcheasey88;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.UnsupportedEncodingException;
+import java.net.Socket;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.LinkedList;
+import java.util.Queue;
+import java.util.Scanner;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.xml.bind.DatatypeConverter;
+
+public class Client extends Thread{
+	
+	private Socket clientSocket;
+	private InputStream inputStream;
+	private OutputStream outputStream;
+	private Queue<String> messages;
+	
+	public Client(Socket socket) throws Exception {
+		this.clientSocket = socket;
+		this.inputStream  = clientSocket.getInputStream();
+        this.outputStream  = clientSocket.getOutputStream();
+        this.messages = new LinkedList<>();
+	}
+	
+	@Override
+	public void run(){
+		try {
+			doHandShakeToInitializeWebSocketConnection();
+			
+			int buffLenth = 1024;
+			int len = 0;            
+	        byte[] b = new byte[buffLenth];
+	        //rawIn is a Socket.getInputStream();
+	        while(true){
+	            len = inputStream.read(b);
+	            if(len!=-1){
+
+	                byte rLength = 0;
+	                int rMaskIndex = 2;
+	                int rDataStart = 0;
+	                //b[0] is always text in my case so no need to check;
+	                byte data = b[1];
+	                byte op = (byte) 127;
+	                rLength = (byte) (data & op);
+
+	                if(rLength==(byte)126) rMaskIndex=4;
+	                if(rLength==(byte)127) rMaskIndex=10;
+
+	                byte[] masks = new byte[4];
+
+	                int j=0;
+	                int i=0;
+	                for(i=rMaskIndex;i<(rMaskIndex+4);i++){
+	                    masks[j] = b[i];
+	                    j++;
+	                }
+
+	                rDataStart = rMaskIndex + 4;
+
+	                int messLen = len - rDataStart;
+
+	                byte[] message = new byte[messLen];
+
+	                for(i=rDataStart, j=0; i<len; i++, j++){
+	                    message[j] = (byte) (b[i] ^ masks[j % 4]);
+	                }
+	                this.messages.add(new String(message));
+	                synchronized(this.messages) {
+	                	this.messages.notify();
+	                }
+
+	                b = new byte[buffLenth];
+
+	            }
+	        }
+		}catch(Exception e) {
+			e.printStackTrace();
+		}
+	}
+	
+	public void sendMessage(String message) throws Exception {
+		outputStream.write(encode(message));
+		outputStream.flush();
+	}
+	
+	private void doHandShakeToInitializeWebSocketConnection() throws UnsupportedEncodingException {
+        String data = new Scanner(inputStream,"UTF-8").useDelimiter("\\r\\n\\r\\n").next();
+
+        Matcher get = Pattern.compile("^GET").matcher(data);
+
+        if (get.find()) {
+            Matcher match = Pattern.compile("Sec-WebSocket-Key: (.*)").matcher(data);
+            match.find();                 
+
+            byte[] response = null;
+            try {
+                response = ("HTTP/1.1 101 Switching Protocols\r\n"
+                        + "Connection: Upgrade\r\n"
+                        + "Upgrade: websocket\r\n"
+                        + "Sec-WebSocket-Accept: "
+                        + DatatypeConverter.printBase64Binary(
+                                MessageDigest
+                                .getInstance("SHA-1")
+                                .digest((match.group(1) + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11")
+                                        .getBytes("UTF-8")))
+                        + "\r\n\r\n")
+                        .getBytes("UTF-8");
+            } catch (NoSuchAlgorithmException e) {
+                e.printStackTrace();
+            }
+
+            try {
+                outputStream.write(response, 0, response.length);
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        } else {
+
+        }
+    }
+
+	public String read() throws Exception{
+		synchronized(this.messages){
+        	this.messages.wait();
+        }
+		return this.messages.poll();
+    }
+
+
+    private byte[] encode(String mess) throws IOException{
+        byte[] rawData = mess.getBytes();
+
+        int frameCount  = 0;
+        byte[] frame = new byte[10];
+
+        frame[0] = (byte) 129;
+
+        if(rawData.length <= 125){
+            frame[1] = (byte) rawData.length;
+            frameCount = 2;
+        }else if(rawData.length >= 126 && rawData.length <= 65535){
+            frame[1] = (byte) 126;
+            int len = rawData.length;
+            frame[2] = (byte)((len >> 8 ) & (byte)255);
+            frame[3] = (byte)(len & (byte)255); 
+            frameCount = 4;
+        }else{
+            frame[1] = (byte) 127;
+            int len = rawData.length;
+            frame[2] = (byte)((len >> 56 ) & (byte)255);
+            frame[3] = (byte)((len >> 48 ) & (byte)255);
+            frame[4] = (byte)((len >> 40 ) & (byte)255);
+            frame[5] = (byte)((len >> 32 ) & (byte)255);
+            frame[6] = (byte)((len >> 24 ) & (byte)255);
+            frame[7] = (byte)((len >> 16 ) & (byte)255);
+            frame[8] = (byte)((len >> 8 ) & (byte)255);
+            frame[9] = (byte)(len & (byte)255);
+            frameCount = 10;
+        }
+
+        int bLength = frameCount + rawData.length;
+
+        byte[] reply = new byte[bLength];
+
+        int bLim = 0;
+        for(int i=0; i<frameCount;i++){
+            reply[bLim] = frame[i];
+            bLim++;
+        }
+        for(int i=0; i<rawData.length;i++){
+            reply[bLim] = rawData[i];
+            bLim++;
+        }
+
+        return reply;
+    }
+}
diff --git a/src/be/jeffcheasey88/Main.java b/src/be/jeffcheasey88/Main.java
new file mode 100644
index 0000000..e932784
--- /dev/null
+++ b/src/be/jeffcheasey88/Main.java
@@ -0,0 +1,59 @@
+package be.jeffcheasey88;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.UnsupportedEncodingException;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Scanner;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.xml.bind.DatatypeConverter;
+
+import be.jeffcheasey88.commands.CommandManager;
+import be.jeffcheasey88.commands.NameCommand;
+
+public class Main {
+	
+	public static void main(String[] args){
+		
+		System.out.println("Start");
+
+        int portNumber = 233;
+
+        ServerSocket server;
+        try {
+            server = new ServerSocket(portNumber);
+        } catch (IOException exception) {
+            throw new IllegalStateException("Could not create web server", exception);
+        }
+        
+        CommandManager manager = new CommandManager(new PlayerRepository());
+        manager.register(new NameCommand());
+
+        while(true){
+            try {
+                Player player = new Player(server.accept()); //waits until a client connects
+                System.out.println("co");
+                player.start();
+                System.out.println("Go");
+                Pipeline pipe = new Pipeline(player);
+                manager.readPipeline(player, pipe);
+            } catch (Exception waitException) {
+                throw new IllegalStateException("Could not wait for client connection", waitException);
+            }
+            
+            System.out.println("Connected");
+        }
+
+
+    }
+
+    //Source for encoding and decoding:
+    //https://stackoverflow.com/questions/8125507/how-can-i-send-and-receive-websocket-messages-on-the-server-side
+
+}
diff --git a/src/be/jeffcheasey88/Pipeline.java b/src/be/jeffcheasey88/Pipeline.java
new file mode 100644
index 0000000..f4561b1
--- /dev/null
+++ b/src/be/jeffcheasey88/Pipeline.java
@@ -0,0 +1,16 @@
+package be.jeffcheasey88;
+
+public class Pipeline {
+	
+	private Client client;
+	
+	public Pipeline(Client client){
+		this.client = client;
+	}
+	
+	public String read() throws Exception{
+		return this.client.read();
+	}
+
+	
+}
diff --git a/src/be/jeffcheasey88/Player.java b/src/be/jeffcheasey88/Player.java
new file mode 100644
index 0000000..c299992
--- /dev/null
+++ b/src/be/jeffcheasey88/Player.java
@@ -0,0 +1,14 @@
+package be.jeffcheasey88;
+
+import java.net.Socket;
+
+public class Player extends Client{
+	
+	private String name;
+	
+	public Player(Socket socket) throws Exception {
+		super(socket);
+	}
+	
+
+}
diff --git a/src/be/jeffcheasey88/PlayerRepository.java b/src/be/jeffcheasey88/PlayerRepository.java
new file mode 100644
index 0000000..b604059
--- /dev/null
+++ b/src/be/jeffcheasey88/PlayerRepository.java
@@ -0,0 +1,24 @@
+package be.jeffcheasey88;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class PlayerRepository {
+	
+	private Map<String, Player> players;
+	
+	public PlayerRepository(){
+		this.players = new HashMap<>();
+	}
+	
+	public void update(Player player, String lastname, String newName){
+		this.players.remove(lastname);
+		player.setName(newName);
+		this.players.put(newName, player);
+		System.out.println("Hello "+newName);
+	}
+	
+	public Player getPlayer(String name){
+		return this.players.get(name);
+	}
+}
diff --git a/src/be/jeffcheasey88/commands/Command.java b/src/be/jeffcheasey88/commands/Command.java
new file mode 100644
index 0000000..9004578
--- /dev/null
+++ b/src/be/jeffcheasey88/commands/Command.java
@@ -0,0 +1,21 @@
+package be.jeffcheasey88.commands;
+
+import org.json.simple.JSONObject;
+
+import be.jeffcheasey88.Player;
+import be.jeffcheasey88.PlayerRepository;
+
+public abstract class Command {
+
+	private String type;
+	
+	public Command(String type){
+		this.type = type;
+	}
+	
+	public String getType(){
+		return this.type;
+	}
+	
+	public abstract void execute(PlayerRepository repo, Player player, JSONObject json);
+}
diff --git a/src/be/jeffcheasey88/commands/CommandManager.java b/src/be/jeffcheasey88/commands/CommandManager.java
new file mode 100644
index 0000000..6127901
--- /dev/null
+++ b/src/be/jeffcheasey88/commands/CommandManager.java
@@ -0,0 +1,41 @@
+package be.jeffcheasey88.commands;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.json.simple.JSONObject;
+import org.json.simple.parser.JSONParser;
+
+import be.jeffcheasey88.Pipeline;
+import be.jeffcheasey88.Player;
+import be.jeffcheasey88.PlayerRepository;
+
+public class CommandManager{
+	
+	private Map<String, Command> commands;
+	private PlayerRepository repo;
+	
+	public CommandManager(PlayerRepository repo){
+		this.commands = new HashMap<>();
+		this.repo = repo;
+	}
+	
+	public void register(Command command){
+		this.commands.put(command.getType(), command);
+	}
+
+	public void readPipeline(Player player, Pipeline pipe){
+		try {
+			while(true){
+				String value = pipe.read();
+				System.out.println(value);
+				JSONObject json = (JSONObject) new JSONParser().parse(value);
+				String type = (String) json.get("type");
+				Command command = this.commands.get(type);
+				command.execute(repo,player, json);
+			}
+		}catch(Exception e){
+			e.printStackTrace();
+		}
+	}
+}
diff --git a/src/be/jeffcheasey88/commands/NameCommand.java b/src/be/jeffcheasey88/commands/NameCommand.java
new file mode 100644
index 0000000..cddcabc
--- /dev/null
+++ b/src/be/jeffcheasey88/commands/NameCommand.java
@@ -0,0 +1,18 @@
+package be.jeffcheasey88.commands;
+
+import org.json.simple.JSONObject;
+
+import be.jeffcheasey88.Player;
+import be.jeffcheasey88.PlayerRepository;
+
+public class NameCommand extends Command{
+
+	public NameCommand(){
+		super("name");
+	}
+
+	@Override
+	public void execute(PlayerRepository repo, Player player, JSONObject json){
+		repo.update(player, player.getName(), (String) json.get("value"));
+	}
+}
diff --git a/src/be/jeffcheasey88/commands/OtherCommand.java b/src/be/jeffcheasey88/commands/OtherCommand.java
new file mode 100644
index 0000000..9d44ef9
--- /dev/null
+++ b/src/be/jeffcheasey88/commands/OtherCommand.java
@@ -0,0 +1,26 @@
+package be.jeffcheasey88.commands;
+
+import java.util.regex.Pattern;
+
+import org.json.simple.JSONObject;
+
+import be.jeffcheasey88.Player;
+import be.jeffcheasey88.PlayerRepository;
+
+public class OtherCommand extends Command{
+	
+	public static void main(String[] args){
+		String regex = "^\\d$";
+		System.out.println(Pattern.matches(regex,"2"));
+		System.out.println(Pattern.matches("2-210208-1-4", regex));
+	}
+
+	public OtherCommand(){
+		super("other");
+	}
+
+	@Override
+	public void execute(PlayerRepository repo, Player player, JSONObject json){
+		
+	}
+}