Customer.php

<?php

class Customer
{
    private int $id;
    private string $name;
    private string $status;

    public function __construct(int $id, string $name, string $status)
    {
        $this->id = $id;
        $this->name = $name;
        $this->status = $status;
    }

    public function getId(): int
    {
        return $this->id;
    }

    public function getName(): string
    {
        return $this->name;
    }

    public function getStatus(): string
    {
        return $this->status;
    }

    public function setStatus(string $status): void
    {
        $this->status = $status;
    }
}

CustomerService.php

<?php

class CustomerService
{
    public function addCustomer(string $name): Customer
    {
        // Create a new customer with the "new" status
        $customer = new Customer(1, $name, CustomerStatus::NEW);
        
        // Perform any necessary actions, such as syncing with the website
        
        // Return the newly created customer
        return $customer;
    }

    public function registerOnWebsite(Customer $customer): void
    {
        // Perform the registration logic on the website

        // Update the customer's status to "invited" or "active" based on the registration result
        $customer->setStatus(CustomerStatus::ACTIVE);
    }

    public function denyRegistration(Customer $customer): void
    {
        // Deny the registration on the website

        // Update the customer's status to "denied"
        $customer->setStatus(CustomerStatus::DENIED);
    }
}

CustomerStatus.php

<?php

class CustomerStatus
{
    public const NEW = 'new';
    public const INVITED = 'invited';
    public const ACTIVE = 'active';
    public const DENIED = 'denied';
    public const DEACTIVATED = 'deactivated';
}

example.php

<?php

// Example usage

$customerService = new CustomerService();

// Add a new customer
$customer = $customerService->addCustomer('John Doe');
echo "New customer added: {$customer->getName()} ({$customer->getStatus()})\n";

// Simulate registration on the website
$customerService->registerOnWebsite($customer);
echo "Customer registered on the website: {$customer->getName()} ({$customer->getStatus()})\n";

// Deny the registration
$customerService->denyRegistration($customer);
echo "Customer registration denied: {$customer->getName()} ({$customer->getStatus()})\n";