echo.cpp

#include "command.h"
#include "globals.h"
#include <QString>
#include <QDir>
#include <QFile>
#include <QTextStream>
#include <QCommandLineParser>
using namespace std;

echo::echo(QString input){

    cmd = input;

    if(cmd.contains(">>")){
        this->echo_a();
    }
    else if (cmd.contains(">")){
        this->echo_o();
    }
    else if(cmd.contains("|")){
        this->echo_p();
    }

    else if(cmd.contains("-h") or cmd.contains("--help") or cmd.contains("-?")){
        this->echo_h();
    }
    else {

        QString sub = cmd.mid(5);
        output = this->echo_n(sub);

    }

    out << output <<endl;
}


QString echo::echo_n(QString str){  // n = normal

    return str;
}
void echo::echo_a(){
    int index = cmd.indexOf(">>");
    int length = cmd.length();
    QString filename = cmd.right(length - index - 3);
    QFile file(filename);

    if (!file.exists())
        out << "File does not exist!\n";
    else
    {

        //out << index;

        QString in = cmd.remove(index, cmd.length());
        in = cmd.mid(5);
        string s = in.toStdString();
        QByteArray putt = s.c_str();

        file.open(QIODevice::Append | QIODevice::Text);
        file.write(putt);
        file.flush();
        file.close();
    }
}
void echo::echo_o(){
    int index = cmd.indexOf(">");
    int length = cmd.length();
    QString filename = cmd.right(length - index - 2);
    QFile file(filename);
    if (!file.exists())
        out << "File does not exist!\n";
    else
    {
        QString in = cmd.remove(index, length);
        in = cmd.mid(5);
        string s = in.toStdString();
        QByteArray putt = s.c_str();

        file.open(QIODevice::WriteOnly | QIODevice::Text);
        file.write(putt);
        file.close();
    }
}
void echo::echo_p(){

}
void echo::echo_h(){
    parse.addHelpOption();
    parse.setApplicationDescription("\nOutputs entered standard input back into the program\nUse >> followed by filename to append the standard input to that file\nUse > followed by the filename to overwrite contents of the file by the standard input\n ");
    out << parse.helpText() << endl;
}