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107 lines
2.4 KiB
107 lines
2.4 KiB
<?php
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namespace Gregwar\Captcha;
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use Symfony\Component\Finder\Finder;
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/**
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* Handles actions related to captcha image files including saving and garbage collection
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*
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* @author Gregwar <g.passault@gmail.com>
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* @author Jeremy Livingston <jeremy@quizzle.com>
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*/
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class ImageFileHandler
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{
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/**
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* Name of folder for captcha images
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* @var string
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*/
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protected $imageFolder;
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/**
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* Absolute path to public web folder
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* @var string
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*/
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protected $webPath;
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/**
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* Frequency of garbage collection in fractions of 1
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* @var int
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*/
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protected $gcFreq;
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/**
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* Maximum age of images in minutes
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* @var int
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*/
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protected $expiration;
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/**
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* @param $imageFolder
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* @param $webPath
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* @param $gcFreq
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* @param $expiration
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*/
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public function __construct($imageFolder, $webPath, $gcFreq, $expiration)
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{
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$this->imageFolder = $imageFolder;
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$this->webPath = $webPath;
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$this->gcFreq = $gcFreq;
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$this->expiration = $expiration;
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}
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/**
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* Saves the provided image content as a file
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*
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* @param string $contents
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*
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* @return string
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*/
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public function saveAsFile($contents)
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{
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$this->createFolderIfMissing();
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$filename = md5(uniqid()) . '.jpg';
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$filePath = $this->webPath . '/' . $this->imageFolder . '/' . $filename;
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imagejpeg($contents, $filePath, 15);
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return '/' . $this->imageFolder . '/' . $filename;
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}
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/**
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* Randomly runs garbage collection on the image directory
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*
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* @return bool
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*/
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public function collectGarbage()
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{
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if (!mt_rand(1, $this->gcFreq) == 1) {
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return false;
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}
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$this->createFolderIfMissing();
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$finder = new Finder();
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$criteria = sprintf('<= now - %s minutes', $this->expiration);
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$finder->in($this->webPath . '/' . $this->imageFolder)
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->date($criteria);
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foreach($finder->files() as $file) {
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unlink($file->getPathname());
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}
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return true;
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}
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/**
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* Creates the folder if it doesn't exist
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*/
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protected function createFolderIfMissing()
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{
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if (!file_exists($this->webPath . '/' . $this->imageFolder)) {
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mkdir($this->webPath . '/' . $this->imageFolder, 0755);
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}
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}
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}
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