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<?php
/**
* Klein (klein.php) - A fast & flexible router for PHP
*
* @author Chris O'Hara <cohara87@gmail.com>
* @author Trevor Suarez (Rican7) (contributor and v2 refactorer)
* @copyright (c) Chris O'Hara
* @link https://github.com/klein/klein.php
* @license MIT
*/
namespace Klein;
use BadMethodCallException;
use Klein\Exceptions\ValidationException;
/**
* Validator
*/
class Validator
{
/**
* Class properties
*/
/**
* The available validator methods
*
* @type array
*/
public static $methods = array();
/**
* The string to validate
*
* @type string
*/
protected $str;
/**
* The custom exception message to throw on validation failure
*
* @type string
*/
protected $err;
/**
* Flag for whether the default validation methods have been added or not
*
* @type boolean
*/
protected static $default_added = false;
/**
* Methods
*/
/**
* Sets up the validator chain with the string and optional error message
*
* @param string $str The string to validate
* @param string $err The optional custom exception message to throw on validation failure
*/
public function __construct($str, $err = null)
{
$this->str = $str;
$this->err = $err;
if (!static::$default_added) {
static::addDefault();
}
}
/**
* Adds default validators on first use
*
* @return void
*/
public static function addDefault()
{
static::$methods['null'] = function ($str) {
return $str === null || $str === '';
};
static::$methods['len'] = function ($str, $min, $max = null) {
$len = strlen($str);
return null === $max ? $len === $min : $len >= $min && $len <= $max;
};
static::$methods['int'] = function ($str) {
return (string)$str === ((string)(int)$str);
};
static::$methods['float'] = function ($str) {
return (string)$str === ((string)(float)$str);
};
static::$methods['email'] = function ($str) {
return filter_var($str, FILTER_VALIDATE_EMAIL) !== false;
};
static::$methods['url'] = function ($str) {
return filter_var($str, FILTER_VALIDATE_URL) !== false;
};
static::$methods['ip'] = function ($str) {
return filter_var($str, FILTER_VALIDATE_IP) !== false;
};
static::$methods['remoteip'] = function ($str) {
return filter_var($str, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) !== false;
};
static::$methods['alnum'] = function ($str) {
return ctype_alnum($str);
};
static::$methods['alpha'] = function ($str) {
return ctype_alpha($str);
};
static::$methods['contains'] = function ($str, $needle) {
return strpos($str, $needle) !== false;
};
static::$methods['regex'] = function ($str, $pattern) {
return preg_match($pattern, $str);
};
static::$methods['chars'] = function ($str, $chars) {
return preg_match("/^[$chars]++$/i", $str);
};
static::$default_added = true;
}
/**
* Add a custom validator to our list of validation methods
*
* @param string $method The name of the validator method
* @param callable $callback The callback to perform on validation
* @return void
*/
public static function addValidator($method, $callback)
{
static::$methods[strtolower($method)] = $callback;
}
/**
* Magic "__call" method
*
* Allows the ability to arbitrarily call a validator with an optional prefix
* of "is" or "not" by simply calling an instance property like a callback
*
* @param string $method The callable method to execute
* @param array $args The argument array to pass to our callback
* @throws BadMethodCallException If an attempt was made to call a validator modifier that doesn't exist
* @throws ValidationException If the validation check returns false
* @return Validator|boolean
*/
public function __call($method, $args)
{
$reverse = false;
$validator = $method;
$method_substr = substr($method, 0, 2);
if ($method_substr === 'is') { // is<$validator>()
$validator = substr($method, 2);
} elseif ($method_substr === 'no') { // not<$validator>()
$validator = substr($method, 3);
$reverse = true;
}
$validator = strtolower($validator);
if (!$validator || !isset(static::$methods[$validator])) {
throw new BadMethodCallException('Unknown method '. $method .'()');
}
$validator = static::$methods[$validator];
array_unshift($args, $this->str);
switch (count($args)) {
case 1:
$result = $validator($args[0]);
break;
case 2:
$result = $validator($args[0], $args[1]);
break;
case 3:
$result = $validator($args[0], $args[1], $args[2]);
break;
case 4:
$result = $validator($args[0], $args[1], $args[2], $args[3]);
break;
default:
$result = call_user_func_array($validator, $args);
break;
}
$result = (bool)($result ^ $reverse);
if (false === $this->err) {
return $result;
} elseif (false === $result) {
throw new ValidationException($this->err);
}
return $this;
}
}
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