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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\File;
use Traversable;
use Zend\Stdlib\ArrayUtils;
use Zend\Validator\AbstractValidator;
use Zend\Validator\Exception;
/**
* Validator for the file extension of a file
*/
class Extension extends AbstractValidator
{
/**
* @const string Error constants
*/
const FALSE_EXTENSION = 'fileExtensionFalse';
const NOT_FOUND = 'fileExtensionNotFound';
/**
* @var array Error message templates
*/
protected $messageTemplates = array(
self::FALSE_EXTENSION => "File has an incorrect extension",
self::NOT_FOUND => "File is not readable or does not exist",
);
/**
* Options for this validator
*
* @var array
*/
protected $options = array(
'case' => false, // Validate case sensitive
'extension' => '', // List of extensions
);
/**
* @var array Error message template variables
*/
protected $messageVariables = array(
'extension' => array('options' => 'extension'),
);
/**
* Sets validator options
*
* @param string|array|Traversable $options
*/
public function __construct($options = null)
{
if ($options instanceof Traversable) {
$options = ArrayUtils::iteratorToArray($options);
}
$case = null;
if (1 < func_num_args()) {
$case = func_get_arg(1);
}
if (is_array($options)) {
if (isset($options['case'])) {
$case = $options['case'];
unset($options['case']);
}
if (!array_key_exists('extension', $options)) {
$options = array('extension' => $options);
}
} else {
$options = array('extension' => $options);
}
if ($case !== null) {
$options['case'] = $case;
}
parent::__construct($options);
}
/**
* Returns the case option
*
* @return bool
*/
public function getCase()
{
return $this->options['case'];
}
/**
* Sets the case to use
*
* @param bool $case
* @return Extension Provides a fluent interface
*/
public function setCase($case)
{
$this->options['case'] = (bool) $case;
return $this;
}
/**
* Returns the set file extension
*
* @return array
*/
public function getExtension()
{
$extension = explode(',', $this->options['extension']);
return $extension;
}
/**
* Sets the file extensions
*
* @param string|array $extension The extensions to validate
* @return Extension Provides a fluent interface
*/
public function setExtension($extension)
{
$this->options['extension'] = null;
$this->addExtension($extension);
return $this;
}
/**
* Adds the file extensions
*
* @param string|array $extension The extensions to add for validation
* @return Extension Provides a fluent interface
*/
public function addExtension($extension)
{
$extensions = $this->getExtension();
if (is_string($extension)) {
$extension = explode(',', $extension);
}
foreach ($extension as $content) {
if (empty($content) || !is_string($content)) {
continue;
}
$extensions[] = trim($content);
}
$extensions = array_unique($extensions);
// Sanity check to ensure no empty values
foreach ($extensions as $key => $ext) {
if (empty($ext)) {
unset($extensions[$key]);
}
}
$this->options['extension'] = implode(',', $extensions);
return $this;
}
/**
* Returns true if and only if the file extension of $value is included in the
* set extension list
*
* @param string|array $value Real file to check for extension
* @param array $file File data from \Zend\File\Transfer\Transfer (optional)
* @return bool
*/
public function isValid($value, $file = null)
{
if (is_string($value) && is_array($file)) {
// Legacy Zend\Transfer API support
$filename = $file['name'];
$file = $file['tmp_name'];
} elseif (is_array($value)) {
if (!isset($value['tmp_name']) || !isset($value['name'])) {
throw new Exception\InvalidArgumentException(
'Value array must be in $_FILES format'
);
}
$file = $value['tmp_name'];
$filename = $value['name'];
} else {
$file = $value;
$filename = basename($file);
}
$this->setValue($filename);
// Is file readable ?
if (empty($file) || false === stream_resolve_include_path($file)) {
$this->error(self::NOT_FOUND);
return false;
}
$extension = substr($filename, strrpos($filename, '.') + 1);
$extensions = $this->getExtension();
if ($this->getCase() && (in_array($extension, $extensions))) {
return true;
} elseif (!$this->getCase()) {
foreach ($extensions as $ext) {
if (strtolower($ext) == strtolower($extension)) {
return true;
}
}
}
$this->error(self::FALSE_EXTENSION);
return false;
}
}