cx-newsletter/components/03-customer.php

<?php

namespace cx_newsletter;

class customer 
extends database_item
implements database_item_interface {
    public ?string $company = null;
    public ?string $name = null;
    public ?string $surname = null;
    public ?string $comments = null;
    public ?string $email = null;
    public ?string $phone_number = null;
    public ?bool $tester = null;
    public ?group $group = null;

    public function is_complete() : bool {
        if ($this->company === null) return false;
        if ($this->name === null) return false;
        if ($this->surname === null) return false;
        if ($this->comments === null) return false;
        if ($this->email === null) return false;
        if ($this->phone_number === null) return false;
        if ($this->tester === null) return false;

        return true;
    }
}