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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Validator;
use DateTime;
use DateTimeInterface;
use Traversable;
/**
* Validates that a given value is a DateTime instance or can be converted into one.
*/
class Date extends AbstractValidator
{
/**#@+
* Validity constants
* @var string
*/
const INVALID = 'dateInvalid';
const INVALID_DATE = 'dateInvalidDate';
const FALSEFORMAT = 'dateFalseFormat';
/**#@-*/
/**
* Default format constant
* @var string
*/
const FORMAT_DEFAULT = 'Y-m-d';
/**
* Validation failure message template definitions
*
* @var array
*/
protected $messageTemplates = array(
self::INVALID => "Invalid type given. String, integer, array or DateTime expected",
self::INVALID_DATE => "The input does not appear to be a valid date",
self::FALSEFORMAT => "The input does not fit the date format '%format%'",
);
/**
* @var array
*/
protected $messageVariables = array(
'format' => 'format',
);
/**
* @var string
*/
protected $format = self::FORMAT_DEFAULT;
/**
* Sets validator options
*
* @param string|array|Traversable $options OPTIONAL
*/
public function __construct($options = array())
{
if ($options instanceof Traversable) {
$options = iterator_to_array($options);
} elseif (!is_array($options)) {
$options = func_get_args();
$temp['format'] = array_shift($options);
$options = $temp;
}
parent::__construct($options);
}
/**
* Returns the format option
*
* @return string|null
*/
public function getFormat()
{
return $this->format;
}
/**
* Sets the format option
*
* Format cannot be null. It will always default to 'Y-m-d', even
* if null is provided.
*
* @param string $format
* @return Date provides a fluent interface
* @todo validate the format
*/
public function setFormat($format = self::FORMAT_DEFAULT)
{
$this->format = (empty($format)) ? self::FORMAT_DEFAULT : $format;
return $this;
}
/**
* Returns true if $value is a DateTime instance or can be converted into one.
*
* @param string|array|int|DateTime $value
* @return bool
*/
public function isValid($value)
{
$this->setValue($value);
if (!$this->convertToDateTime($value)) {
$this->error(self::INVALID_DATE);
return false;
}
return true;
}
/**
* Attempts to convert an int, string, or array to a DateTime object
*
* @param string|int|array $param
* @param bool $addErrors
* @return bool|DateTime
*/
protected function convertToDateTime($param, $addErrors = true)
{
// @TODO: when minimum dependency will be PHP 5.5, we can only keep check against DateTimeInterface
if ($param instanceof DateTime || $param instanceof DateTimeInterface) {
return $param;
}
$type = gettype($param);
if (!in_array($type, array('string', 'integer', 'array'))) {
if ($addErrors) {
$this->error(self::INVALID);
}
return false;
}
$convertMethod = 'convert' . ucfirst($type);
return $this->{$convertMethod}($param, $addErrors);
}
/**
* Attempts to convert an integer into a DateTime object
*
* @param integer $value
* @return bool|DateTime
*/
protected function convertInteger($value)
{
return date_create("@$value");
}
/**
* Attempts to convert a string into a DateTime object
*
* @param string $value
* @param bool $addErrors
* @return bool|DateTime
*/
protected function convertString($value, $addErrors = true)
{
$date = DateTime::createFromFormat($this->format, $value);
// Invalid dates can show up as warnings (ie. "2007-02-99")
// and still return a DateTime object.
$errors = DateTime::getLastErrors();
if ($errors['warning_count'] > 0) {
if ($addErrors) {
$this->error(self::FALSEFORMAT);
}
return false;
}
return $date;
}
/**
* Implodes the array into a string and proxies to {@link convertString()}.
*
* @param array $value
* @param bool $addErrors
* @return bool|DateTime
* @todo enhance the implosion
*/
protected function convertArray(array $value, $addErrors = true)
{
return $this->convertString(implode('-', $value), $addErrors);
}
}