xNightR00T File Manager

<?php

namespace ZendServer\View\Helper;

use Zend\View\Helper\AbstractHelper;
use ZendServer\Exception;

class FileSize extends AbstractHelper
{
    const AUTO      = 'AUTO';
    const B         = 'B';
    const KB        = 'KB';
    const MB        = 'MB';
    const GB        = 'GB';
    const SHOW_UNIT = true;
    const HIDE_UNIT = false;

    protected $sizes = array(self::GB => 30,
        self::MB => 20,
        self::KB => 10,
        self::B => 1);

    /**
     * Get a filesize label.
     *
     * @param integer $size
     * @param string $outputUnit
     * @return string
     * @throws ZendServer\Exception
     */
    public function __invoke($size, $outputUnit = self::AUTO, $showUnit = self::SHOW_UNIT)
    {
        if (!defined("ZendServer\View\Helper\FileSize::$outputUnit")) {
            throw new Exception("Wrong parameter type {$outputUnit}.");
        }
        if (self::AUTO == $outputUnit) {
            $outputUnit = $this->outputSize($size);
        }
        $size = ( $size / ( 1 << $this->sizes[$outputUnit]) );

        // if the number is float, we keep only 2 digits after the decimal point
        if ($size != (int) $size) {
            $size = number_format($size, 2);
        }

        // in the previous if we may have gone in it with 2.0000001 and after it ended with
        // $size = 2.00 so we should trim the 00
        if ($size == (int) $size) {
            $size = (int) $size;
        }

        if ($showUnit) {
            return "$size {$outputUnit}";
        } else {
            return $size;
        }
    }

    /**
     * Calculate the best output size (KB, MB...)
     *
     * @param int $size, size in bytes
     * @return string - Zwas_View_Helper_CE_FileSize constant
     */
    private function outputSize($size)
    {
        foreach ($this->sizes as $type => $mul) {
            if ($size >= (1 << $mul)) {
                return $type;
            }
        }
        // return the smallest (last one itarated) size type
        return $type;
    }
}