<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category  Zend

 * @package   Zend_Validate

 * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)

 * @license   http://framework.zend.com/license/new-bsd     New BSD License

 * @version   $Id$

 */

/**

 * @see Zend_Validate_Abstract

 */

require_once 'Zend/Validate/Abstract.php';

/**

 * Validator for the maximum size of a file up to a max of 2GB

 *

 * @category  Zend

 * @package   Zend_Validate

 * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)

 * @license   http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Validate_File_Size extends Zend_Validate_Abstract

{

    /**#@+

     * @const string Error constants

     */

    const TOO_BIG   = 'fileSizeTooBig';

    const TOO_SMALL = 'fileSizeTooSmall';

    const NOT_FOUND = 'fileSizeNotFound';

    /**#@-*/

    /**

     * @var array Error message templates

     */

    protected $_messageTemplates = array(

        self::TOO_BIG   => "Maximum allowed size for file '%value%' is '%max%' but '%size%' detected",

        self::TOO_SMALL => "Minimum expected size for file '%value%' is '%min%' but '%size%' detected",

        self::NOT_FOUND => "File '%value%' is not readable or does not exist",

    );

    /**

     * @var array Error message template variables

     */

    protected $_messageVariables = array(

        'min'  => '_min',

        'max'  => '_max',

        'size' => '_size',

    );

    /**

     * Minimum filesize

     * @var integer

     */

    protected $_min;

    /**

     * Maximum filesize

     *

     * If null, there is no maximum filesize

     *

     * @var integer|null

     */

    protected $_max;

    /**

     * Detected size

     *

     * @var integer

     */

    protected $_size;

    /**

     * Use bytestring ?

     *

     * @var boolean

     */

    protected $_useByteString = true;

    /**

     * Sets validator options

     *

     * If $options is a integer, it will be used as maximum filesize

     * As Array is accepts the following keys:

     * 'min': Minimum filesize

     * 'max': Maximum filesize

     * 'bytestring': Use bytestring or real size for messages

     *

     * @param  integer|array $options Options for the adapter

     * @throws Zend_Validate_Exception

     */

    public function __construct($options)

    {

        if ($options instanceof Zend_Config) {

            $options = $options->toArray();

        } elseif (is_string($options) || is_numeric($options)) {

            $options = array('max' => $options);

        } elseif (!is_array($options)) {

            require_once 'Zend/Validate/Exception.php';

            throw new Zend_Validate_Exception ('Invalid options to validator provided');

        }

        if (1 < func_num_args()) {

            $argv = func_get_args();

            array_shift($argv);

            $options['max'] = array_shift($argv);

            if (!empty($argv)) {

                $options['bytestring'] = array_shift($argv);

            }

        }

        if (isset($options['bytestring'])) {

            $this->setUseByteString($options['bytestring']);

        }

        if (isset($options['min'])) {

            $this->setMin($options['min']);

        }

        if (isset($options['max'])) {

            $this->setMax($options['max']);

        }

    }

    /**

     * Returns the minimum filesize

     *

     * @param  boolean $byteString Use bytestring ?

     * @return integer

     */

    public function setUseByteString($byteString = true)

    {

        $this->_useByteString = (bool) $byteString;

        return $this;

    }

    /**

     * Will bytestring be used?

     *

     * @return boolean

     */

    public function useByteString()

    {

        return $this->_useByteString;

    }

    /**

     * Returns the minimum filesize

     *

     * @param  bool $raw Whether or not to force return of the raw value (defaults off)

     * @return integer|string

     */

    public function getMin($raw = false)

    {

        $min = $this->_min;

        if (!$raw && $this->useByteString()) {

            $min = $this->_toByteString($min);

        }

        return $min;

    }

    /**

     * Sets the minimum filesize

     *

     * @param  integer $min The minimum filesize

     * @throws Zend_Validate_Exception When min is greater than max

     * @return Zend_Validate_File_Size Provides a fluent interface

     */

    public function setMin($min)

    {

        if (!is_string($min) and !is_numeric($min)) {

            require_once 'Zend/Validate/Exception.php';

            throw new Zend_Validate_Exception ('Invalid options to validator provided');

        }

        $min = (integer) $this->_fromByteString($min);

        $max = $this->getMax(true);

        if (($max !== null) && ($min > $max)) {

            require_once 'Zend/Validate/Exception.php';

            throw new Zend_Validate_Exception("The minimum must be less than or equal to the maximum filesize, but $min >"

                                            . " $max");

        }

        $this->_min = $min;

        return $this;

    }

    /**

     * Returns the maximum filesize

     *

     * @param  bool $raw Whether or not to force return of the raw value (defaults off)

     * @return integer|string

     */

    public function getMax($raw = false)

    {

        $max = $this->_max;

        if (!$raw && $this->useByteString()) {

            $max = $this->_toByteString($max);

        }

        return $max;

    }

    /**

     * Sets the maximum filesize

     *

     * @param  integer $max The maximum filesize

     * @throws Zend_Validate_Exception When max is smaller than min

     * @return Zend_Validate_StringLength Provides a fluent interface

     */

    public function setMax($max)

    {

        if (!is_string($max) && !is_numeric($max)) {

            require_once 'Zend/Validate/Exception.php';

            throw new Zend_Validate_Exception ('Invalid options to validator provided');

        }

        $max = (integer) $this->_fromByteString($max);

        $min = $this->getMin(true);

        if (($min !== null) && ($max < $min)) {

            require_once 'Zend/Validate/Exception.php';

            throw new Zend_Validate_Exception("The maximum must be greater than or equal to the minimum filesize, but "

                                            . "$max < $min");

        }

        $this->_max = $max;

        return $this;

    }

    /**

     * Retrieve current detected file size

     *

     * @return int

     */

    protected function _getSize()

    {

        return $this->_size;

    }

    /**

     * Set current size

     *

     * @param  int $size

     * @return Zend_Validate_File_Size

     */

    protected function _setSize($size)

    {

        $this->_size = $size;

        return $this;

    }

    /**

     * Defined by Zend_Validate_Interface

     *

     * Returns true if and only if the filesize of $value is at least min and

     * not bigger than max (when max is not null).

     *

     * @param  string $value Real file to check for size

     * @param  array  $file  File data from Zend_File_Transfer

     * @return boolean

     */

    public function isValid($value, $file = null)

    {

        // Is file readable ?

        require_once 'Zend/Loader.php';

        if (!Zend_Loader::isReadable($value)) {

            return $this->_throw($file, self::NOT_FOUND);

        }

        // limited to 4GB files

        $size        = sprintf("%u", @filesize($value));

        $this->_size = $size;

        // Check to see if it's smaller than min size

        $min = $this->getMin(true);

        $max = $this->getMax(true);

        if (($min !== null) && ($size < $min)) {

            if ($this->useByteString()) {

                $this->_min  = $this->_toByteString($min);

                $this->_size = $this->_toByteString($size);

                $this->_throw($file, self::TOO_SMALL);

                $this->_min  = $min;

                $this->_size = $size;

            } else {

                $this->_throw($file, self::TOO_SMALL);

            }

        }

        // Check to see if it's larger than max size

        if (($max !== null) && ($max < $size)) {

            if ($this->useByteString()) {

                $this->_max  = $this->_toByteString($max);

                $this->_size = $this->_toByteString($size);

                $this->_throw($file, self::TOO_BIG);

                $this->_max  = $max;

                $this->_size = $size;

            } else {

                $this->_throw($file, self::TOO_BIG);

            }

        }

        if (count($this->_messages) > 0) {

            return false;

        }

        return true;

    }

    /**

     * Returns the formatted size

     *

     * @param  integer $size

     * @return string

     */

    protected function _toByteString($size)

    {

        $sizes = array('B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB');

        for ($i=0; $size >= 1024 && $i < 9; $i++) {

            $size /= 1024;

        }

        return round($size, 2) . $sizes[$i];

    }

    /**

     * Returns the unformatted size

     *

     * @param  string $size

     * @return integer

     */

    protected function _fromByteString($size)

    {

        if (is_numeric($size)) {

            return (integer) $size;

        }

        $type  = trim(substr($size, -2, 1));

        $value = substr($size, 0, -1);

        if (!is_numeric($value)) {

            $value = substr($value, 0, -1);

        }

        switch (strtoupper($type)) {

            case 'Y':

                $value *= (1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024);

                break;

            case 'Z':

                $value *= (1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024);

                break;

            case 'E':

                $value *= (1024 * 1024 * 1024 * 1024 * 1024 * 1024);

                break;

            case 'P':

                $value *= (1024 * 1024 * 1024 * 1024 * 1024);

                break;

            case 'T':

                $value *= (1024 * 1024 * 1024 * 1024);

                break;

            case 'G':

                $value *= (1024 * 1024 * 1024);

                break;

            case 'M':

                $value *= (1024 * 1024);

                break;

            case 'K':

                $value *= 1024;

                break;

            default:

                break;

        }

        return $value;

    }

    /**

     * Throws an error of the given type

     *

     * @param  string $file

     * @param  string $errorType

     * @return false

     */

    protected function _throw($file, $errorType)

    {

        if ($file !== null) {

            $this->_value = $file['name'];

        }

        $this->_error($errorType);

        return false;

    }

}