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<?php
namespace MailPoetVendor\Sudzy;
if (!defined('ABSPATH')) exit;
/**
* Singleton valdation engine
**/
class Engine
{
/**
* Validation methods are stored here so they can easily be overwritten
*/
protected $_checks;
public function __construct() {
$this->_checks = [
'required' => [$this, '_required'],
'minLength' => [$this, '_minLength'],
'maxLength' => [$this, '_maxLength'],
'isEmail' => [$this, '_isEmail'],
'isInteger' => [$this, '_isInteger'],
'isNumeric' => [$this, '_isNumeric'],
];
}
public function __call($name, $args) {
if (!isset($this->_checks[$name]))
throw new \InvalidArgumentException("{$name} is not a valid validation function.");
$val = array_shift($args);
$args = array_shift($args);
return call_user_func($this->_checks[$name], $val, $args);
}
public function executeOne($check, $val, $params=[]) {
$callback = __NAMESPACE__ . '\Engine::' . $check;
if (is_callable($callback)) {
return call_user_func($callback, $val, $params);
}
}
/**
* @param string $label label used to call function
* @param Callable $function function with params (value, additional params as array)
* @throws \Exception
*/
public function addValidator($label, $function) {
if (isset($this->_checks[$label])) throw new \Exception();
$this->setValidator($label, $function);
}
public function setValidator($label, $function) {
$this->_checks[$label] = $function;
}
public function removeValidator($label) {
unset($this->_checks[$label]);
}
/**
* @return array<int, int|string> The list of usable validator methods
*/
public function getValidators() {
return array_keys($this->_checks);
}
///// Validator methods
protected function _isEmail($val, $params) {
return false !== filter_var($val, FILTER_VALIDATE_EMAIL);
}
protected function _isInteger($val, $params) {
if (!is_numeric($val)) return false;
return intval($val) == $val;
}
protected function _isNumeric($val, $params) {
return is_numeric($val);
}
protected function _minLength($val, $params) {
$len = array_shift($params);
return strlen($val) >= $len;
}
protected function _maxLength($val, $params) {
$len = array_shift($params);
return strlen($val) <= $len;
}
protected function _required($val, $params=[]) {
return !(($val === null) || ('' === trim($val)));
}
}