mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "user.h"
#include "product_window.h"
#include <QMessageBox>

std::vector<User> users;

// Member initializer list
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pb_sign_up_clicked()
{
    std::string name = ui->le_name->text().toStdString();
    std::string username = ui->le_username->text().toStdString();
    std::string password = ui->le_pass->text().toStdString();

    User user(name, username, password);
    users.push_back(user);


    QMessageBox ms;
    ms.setText("You have successfully registered!");
    ms.setWindowTitle("Sign-up");

    ms.exec();
}


void MainWindow::on_pb_login_clicked()
{
    std::string username = ui->le_username_login->text().toStdString();
    std::string password = ui->le_pass_login->text().toStdString();

    for (std::vector<User>::iterator it = users.begin(); it != users.end(); it++){
        if ((it->getUsername() == username) && (it->getPassword() == password)){
            // it -> user
            product_window* productWindow = new product_window(*it);
            productWindow->show();
            this->close();
        }
        else {
            continue;
        }
    }
}