/**
 * @file    shred.cpp
 * @brief   shred drive
 * @author  hendrik schutter
 * @date    03.05.2020
 */

#include "../include/reHDD.h"

/**
 * \brief   shred drive with shred
 * \param	pointer of Drive instance
 * \return  void
 */
void Shred::shredDrive(Drive* drive, int* fdInformPipeWrite)

{
    size_t len = 0; //lenght of found line
    char* cLine = NULL; //found line

#ifndef DRYRUN
    string sCMD = ("shred -v ");
    sCMD.append(drive->getPath());
#endif

#ifdef DRYRUN
    //cout << "dryrun for " << drive->getPath() << endl;
    string sCMD = ("bash shred_dummy.sh");
#endif

    const char* cpComand = sCMD.c_str();
    //cout << "shred: " << cpComand << endl;

    FILE* shredCmdOutput = popen(cpComand, "r");

    while ((getline(&cLine, &len, shredCmdOutput)) != -1)
        {
            if(drive->state == Drive::SHRED_ACTIVE)
                {
                    string sLine = string(cLine);
                    string search("%");
                    size_t found = sLine.find(search);
                    if (found!=string::npos)
                        {
                            sLine.erase(0, sLine.find("%")-3);
                            sLine.erase(std::remove(sLine.begin(), sLine.end(), '\n'), sLine.end());
                            drive->setTaskPercentage(stoi(sLine));
                            write(*fdInformPipeWrite, "A",1);
                        }
                }
            else
                {
                    return; //end shredding task
                }
        }
    fclose(shredCmdOutput);
}