fuel-stats/app/controllers/RefuelController.php

<?php

class RefuelController extends Controller {
    public function create() {
        if ($_SERVER['REQUEST_METHOD'] === 'POST') {
            $vehicle_id = $_POST['vehicle'] ?? '';
            $fuel_type = $_POST['fuel_type'] ?? '';
            $liters = $_POST['liters'] ?? '';
            $price_per_liter = $_POST['price_per_liter'] ?? '';
            $total_price = $_POST['total_price'] ?? '';
            $note = $_POST['note'] ?? '';

            $validator = new Validator();
            $validator->required('vehicle', $vehicle_id);
            $validator->required('fuel_type', $fuel_type);
            $validator->required('liters', $liters);
            $validator->required('price_per_liter', $price_per_liter);
            $validator->required('total_price', $total_price);
            $validator->number('liters', $liters);
            $validator->number('price_per_liter', $price_per_liter);
            $validator->number('total_price', $total_price);

            if($note == "") $note = NULL;

            if (!$validator->passes()) {
                $vehicle = new Vehicle();
                $vehicles = $vehicle->getVehiclesByUser($_SESSION['user']['id']);
                $this->view('vehicle/create', [
                    'error' => 'Please correct the errors below.',
                    'validationErrors' => $validator->errors() ?: [],
                    'vehicles' => $vehicles
                ]);
                return;
            }

            if ($liters * $price_per_liter != $total_price) {
                $vehicle = new Vehicle();
                $vehicles = $vehicle->getVehiclesByUser($_SESSION['user']['id']);
                $this->view('vehicle/create', [
                    'error' => 'Please correct the errors below.',
                    'validationErrors' => ["Price calculation is wrong"],
                    'vehicles' => $vehicles
                ]);
                return;
            }

            //var_dump(number_format((float)$price_per_liter, 2, '.', ''));
            $record = new Refuel();
            $result = $record->create([
                'user_id' => $_SESSION['user']['id'],
                'vehicle_id' => $vehicle_id,
                'fuel_type' => $fuel_type,
                'note' => $note,
                'liters' => $liters,
                'price_per_liter' => $price_per_liter,
                'total_price' => $total_price,
            ]);

            if ($result === true) {
                $this->redirect('/');
            } else {
                $vehicle = new Vehicle();
                $vehicles = $vehicle->getVehiclesByUser($_SESSION['user']['id']);
                $this->view('refuel/create', ['title' => 'New refuel record', 'error' => $result, 'validationErrors' => [], 'vehicles' => $vehicles] );
            }


        } else {
            $vehicle = new Vehicle();
            $vehicles = $vehicle->getVehiclesByUser($_SESSION['user']['id']);
            $this->view('refuel/create', ['title' => "New refuel record", 'vehicles' => $vehicles]);
        }
    }
}