mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtWidgets>
#include <QDateTime>
#include <QTimer>

#define Path_to_DB "/home/ghostly/Desktop/projects/Business Development /HMS/APPLICATIONS/Database/HMSSecureD"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);


    //set up for the date and time labels
    QTimer *timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(showTime()));
    timer->start(1000);
    showTime();

    QDateTime dateTime = dateTime.currentDateTime();
    QString dateTimeString = dateTime.toString("dddd dd/MM/yyyy");
    QString errorDateTimeString = dateTime.toString("dd/MM/yy hh:mm:ss");
    ui->showDateLabel->setText(dateTimeString);

    //set up for the errorLogs
    QString errorLogsName = "Logs.txt";
    QFile errorLogs(errorLogsName);
    if (QFileInfo::exists("Logs.txt"))
    {
        ui->statusBar->showMessage("[+] Logging activated",5);
        errorLogs.open(QIODevice::WriteOnly | QIODevice::Append);
        QTextStream errorStream(&errorLogs);
        errorStream << errorDateTimeString +  ":New Session: 0101 Logging activated for new session \n"; //later ill add computer name etc
        errorLogs.flush();
        errorLogs.close();
    }
    else
    {
        ui->statusBar->showMessage("Error logs do not exist, creating Logs");
        errorLogs.open(QIODevice::ReadWrite | QIODevice::Text);
        errorLogs.write("Logs.txt \n");
        ui->statusBar->showMessage("Logging file created",2);

        QTextStream errorStream(&errorLogs);
        errorStream << errorDateTimeString  + ":Log Created: 0102 Logging activated for new session \n"; //later ill add computer name etc
        errorLogs.flush();
        errorLogs.close();
        ui->statusBar->showMessage("Ready to connect to the database!");
    }

    //connect to the database. this will later be encrypted with 256bit AES encryption

    ui->statusBar->showMessage("Connecting to database now!");
    myDB = QSqlDatabase::addDatabase("QSQLITE");
    myDB.setDatabaseName(Path_to_DB);
    QFileInfo checkFile(Path_to_DB);

    if(checkFile.isFile())
    {
        if(myDB.open())
        {
            ui->statusBar->showMessage("[+] Connected to the database.");
            errorLogs.open(QIODevice::WriteOnly | QIODevice::Append);
            QTextStream errorStream(&errorLogs);
            errorStream << errorDateTimeString +  ":LOG: 0103 Connected \n"; //later ill add computer name etc
            errorLogs.flush();
            errorLogs.close();
        }
    }else{
        ui->statusBar->showMessage("[+] Unable to connect to the database, database missing!");
        // Write Error to errorLogs {time + "Unable to connect to the database, database missing!" }
        errorLogs.open(QIODevice::WriteOnly | QIODevice::Append);
        QTextStream errorStream(&errorLogs);
        errorStream << errorDateTimeString +  ":ERROR: 0105 Unable to connect to the database, database missing! \n"; //later ill add computer name etc
        errorLogs.flush();
        errorLogs.close();
    }
}

MainWindow::~MainWindow()
{
    delete ui;

    // errorLog
    QDateTime dateTime = dateTime.currentDateTime();
    QString errorDateTimeString = dateTime.toString("dd/MM/yy hh:mm:ss");
    QString errorLogsName = "Logs.txt";
    QFile errorLogs(errorLogsName);
    errorLogs.open(QIODevice::WriteOnly | QIODevice::Append);
    QTextStream errorStream(&errorLogs);
    errorStream << errorDateTimeString +  ":EXIT: 0109 Application exited \n";
    errorLogs.flush();
    errorLogs.close();

    //close database connection
    myDB.close();
}

void MainWindow::showTime()
{
    QTime time = QTime::currentTime();
    QString text = time.toString("hh:mm");
    if ((time.second() % 2) == 0)
        text[2] = ' ';
    ui->showTimeLabel->setText(text);
}



void MainWindow::on_loginBTN_clicked()
{
    qDebug() << "Login clicked";
    QDateTime dateTime = dateTime.currentDateTime();
    QString errorDateTimeString = dateTime.toString("dd/MM/yy hh:mm:ss");

    QString Username, Password;
    Username = ui->usernameIN->text();
    Password = ui->passwordIN->text();

    if(!myDB.isOpen())
    {
        qDebug() << "err";
        ui->statusBar->showMessage("[+] You must be connected to the database to login!");
        // errorLog
        QString errorLogsName = "Logs.txt";
        QFile errorLogs(errorLogsName);
        errorLogs.open(QIODevice::WriteOnly | QIODevice::Append);
        QTextStream errorStream(&errorLogs);
        errorStream << errorDateTimeString +  ":ERROR: 0106 Tried to login without connecting to the database \n"; //later ill add computer name etc
        errorLogs.flush();
        errorLogs.close();
        return;
    }
    qDebug() << "qry";
    QSqlQuery qry;
    if(qry.exec("SELECT Username, Password, Role FROM StaffUsers WHERE Username=\'"
                + Username + "\' AND Password=\'" + Password + "\'"))
    {
        qDebug() << "qry next";
        if(qry.next())
        {
            ui->statusBar->showMessage("[+] Valid Login");
            QString msg = "Username = " + qry.value(0).toString() + " \n" +
                          "Password = " + qry.value(1).toString() + " \n" +
                          "Role = " +qry.value(2).toString();
            QMessageBox::warning(this, "Login was successsful", msg); // later add what type of user

            return;


        }else{
            qDebug() << "INVALID";
            ui->statusBar->showMessage("[-] Invalid User details!");


        }
    }
}