/* 
 * File:   DataPacker.h
 *
 * DataPacker has a single static public method packData(..) that returns the
 * packed data message that is sent to the ATMS Server in the fep_reply struct
 * via RPC.
 * 
 * @author John A. Torres
 * @version 9/8/2017
 */

#ifndef DATAPACKER_H
#define	DATAPACKER_H

// Include dependencies
#include "network.h"
#include <iostream>
#include <string.h>

class DataPacker {
    
public:
    /**
     * Returns packed data message to be sent to ATMS Server in fep_reply via RPC
     * 
     * @param station The station for which the message is to be made
     * @return The packed data message
     */
    static unsigned char * packData(STATION *station);

private:
    static unsigned char *msg;
    // Packs the static data in message sent to ATMS
    unsigned char * staticDataPack(STATION *station);
    // Packs dynamic data in message sent to ATMS
    int dynamicDataPack(STATION *station, int packNo, int pos);
    // Sets last byte of message
    char chksum(unsigned char *dataptr, int len);
    // Tells whether or not data is available for specified lane
    bool DataAvail(char flag, int num);
    // Helper function: packs vol and occ into two byte data packet
    VOLOCC packVOLOCC(int vol, int occ);

};

#endif	/* DATAPACKER_H */