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<?php
include_once './includes/form/Form.php';
include_once './includes/model/User.php';
class RegisterForm extends Form
{
const USERNAME_REGEX = "/^[a-zA-Z0-9_]*$/";
const PASSWORD_REGEX = "/^[a-zA-Z0-9\W]*$/";
public function validate_username($username): ?string
{
$result = null;
if (empty($username)) {
$this->report_error("You must provide a username.");
} else {
$result = filter_var($username, FILTER_SANITIZE_STRING);
if (!preg_match(self::USERNAME_REGEX, $result)) {
$this->report_error("Username can only contain letters, numbers and underscores.");
}
if (strlen($result) > 30) {
$this->report_error("Your username must be 30 characters or less.");
}
if (User::username_exists($result)) {
$this->report_error("The username '" . $result . "' has already been taken by another user.");
}
}
return $result;
}
public function validate_password($password, $password_check): ?string
{
$result = null;
if (empty($password)) {
$this->report_error("You must provide a password.");
} else {
$result = filter_var($password, FILTER_SANITIZE_STRING);
$pass_check = filter_var($password_check, FILTER_SANITIZE_STRING);
if (preg_match(self::PASSWORD_REGEX, $result) === false) {
$this->report_error("Password contains invalid characters!");
}
if ($result !== $pass_check) {
$this->report_error("The two passwords do not match.");
}
}
return $result;
}
}
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