sdis1819-t7g07

package utils;

import channels.McChannel;

import channels.MdbChannel;

import channels.MdrChannel;

import java.net.*;

import java.util.ArrayList;

import java.util.HashMap;

public class Utils {

    public static int BUFFER_SIZE = 256;

    public static MulticastSocket mcSocket;

    public static MulticastSocket mdbSocket;

    public static MulticastSocket mdrSocket;

    public static String version = "1.0";

    public static String crlf = "\\r\\n";

    public static McChannel mcChannel;

    public static MdbChannel mdbChannel;

    public static MdrChannel mdrChannel;

    public static boolean chunkReceived = false;

    public static int restorePeer = 0;

    public static boolean receivedAllChunks = false;

    public static HashMap<String,String> hashDatabase = new HashMap<String, String>();

    public static HashMap<String, ArrayList<Integer>> storedChunks = new HashMap<>();

    public static String encodeHexString(byte[] byteArray) { //https://www.baeldung.com/java-byte-arrays-hex-strings

        StringBuffer hexStringBuffer = new StringBuffer();

        for (int i = 0; i < byteArray.length; i++) {

            hexStringBuffer.append(byteToHex(byteArray[i]));

        }

        return hexStringBuffer.toString();

    }

    public static String byteToHex(byte num) {

        char[] hexDigits = new char[2];

        hexDigits[0] = Character.forDigit((num >> 4) & 0xF, 16);

        hexDigits[1] = Character.forDigit((num & 0xF), 16);

        return new String(hexDigits);

    }

}