132 lines
3.7 KiB
PHP
132 lines
3.7 KiB
PHP
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<?php
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namespace Nextend\Framework\Cache;
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use DateTime;
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class CacheImage extends AbstractCache {
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protected $_storageEngine = 'filesystem';
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protected $lazy = false;
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public function __construct($group) {
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parent::__construct($group, true);
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}
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protected function getScope() {
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return 'image';
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}
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public function setLazy($lazy) {
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$this->lazy = $lazy;
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}
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/**
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* @param $fileExtension
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* @param callable $callable
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* @param array $parameters
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* @param bool $hash
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*
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* @return mixed
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*/
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public function makeCache($fileExtension, $callable, $parameters = array(), $hash = false) {
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if (!$hash) {
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$hash = $this->generateHash($fileExtension, $callable, $parameters);
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}
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if (strpos($parameters[1], '?') !== false) {
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$fileNameParts = explode('?', $parameters[1]);
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$keepFileName = pathinfo($fileNameParts[0], PATHINFO_FILENAME);
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} else {
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$keepFileName = pathinfo($parameters[1], PATHINFO_FILENAME);
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}
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$fileName = $hash . (!empty($keepFileName) ? '/' . $keepFileName : '');
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$fileNameWithExtension = $fileName . '.' . $fileExtension;
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$isCached = $this->exists($fileNameWithExtension);
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if ($isCached) {
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if (!$this->testManifestFile($fileName, $parameters[1])) {
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$isCached = false;
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}
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}
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if (!$isCached) {
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if ($this->lazy) {
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return $parameters[1];
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}
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array_unshift($parameters, $this->getPath($fileNameWithExtension));
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call_user_func_array($callable, $parameters);
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$this->createManifestFile($fileName, $parameters[2]);
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}
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return $this->getPath($fileNameWithExtension);
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}
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private function generateHash($fileExtension, $callable, $parameters) {
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return md5(json_encode(array(
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$fileExtension,
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$callable,
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$parameters
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)));
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}
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protected function testManifestFile($fileName, $originalFile) {
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$manifestKey = $this->getManifestKey($fileName);
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if ($this->exists($manifestKey)) {
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$manifestData = json_decode($this->get($manifestKey), true);
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$newManifestData = $this->getManifestData($originalFile);
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if ($manifestData['mtime'] == $newManifestData['mtime']) {
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return true;
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}
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} else {
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// Backward compatibility
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$this->createManifestFile($fileName, $originalFile);
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return true;
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}
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return false;
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}
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protected function createManifestFile($fileName, $originalFile) {
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$this->set($this->getManifestKey($fileName), json_encode($this->getManifestData($originalFile)));
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}
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private function getManifestData($originalFile) {
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$manifestData = array();
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if (strpos($originalFile, '//') !== false) {
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$manifestData['mtime'] = $this->getRemoteMTime($originalFile);
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} else {
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$manifestData['mtime'] = filemtime($originalFile);
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}
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return $manifestData;
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}
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private function getRemoteMTime($url) {
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if (ini_get('allow_url_fopen')) {
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$h = get_headers($url, 1);
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if (!$h || strpos($h[0], '200') !== false) {
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foreach ($h as $k => $v) {
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if (strtolower(trim($k)) == "last-modified") {
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return (new DateTime($v))->getTimestamp();
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}
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}
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}
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}
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return 0;
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}
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protected function getManifestKey($fileName) {
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return $fileName . '.manifest';
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}
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}
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