SDIS1819-T4G10

import java.nio.charset.StandardCharsets;

public class Message {

        Header header;

        public static String CRLF = "" + (char) 0xD  + (char) 0xA;

        byte[] body;

        public Message(String messageType, String version, int senderId, String fileId,int chunkNo, int ReplicationDeg, byte[] body) {

                //<MessageType> <Version> <SenderId> <FileId> <ChunkNo> <ReplicationDeg> <CRLF>

                this.header= new Header(messageType, version, senderId, fileId, chunkNo, ReplicationDeg);

                this.body = body;

        }

        public String messageToString() {

                if(body != null)

                return header.getMessageType() + " " + header.getVersion() + " " + header.getSenderId() + " " + header.getFileId() + " " + 

                header.getChunkNo() + " " + header.getReplicationDeg() + " "+ CRLF + CRLF + new String(body, StandardCharsets.UTF_8);

                else return header.getMessageType() + " " + header.getVersion() + " " + header.getSenderId() + " " + header.getFileId() + " " + 

                header.getChunkNo() + " " + header.getReplicationDeg() + " "+ CRLF + CRLF;

        }        

        public String messageToStringPrintable() {

                return header.getMessageType() + " " + header.getVersion() + " " + header.getSenderId() + " " + header.getFileId() + " " + 

                header.getChunkNo() + " " + header.getReplicationDeg() ;

        }

        public byte[] sendable() {

                return this.messageToString().getBytes();

        }

        public byte[] getBody() 

        {

                return this.body;

        }

}