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wp-content/plugins/smart-slider-3/Nextend/Framework/Cache/CacheGoogleFont.php

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+<?php
+
+namespace Nextend\Framework\Cache;
+
+use Nextend\Framework\Filesystem\Filesystem;
+use Nextend\Framework\Misc\HttpClient;
+
+class CacheGoogleFont extends AbstractCache {
+
+    protected $_storageEngine = 'filesystem';
+    private $fontExtension;
+
+    public function __construct() {
+        parent::__construct('googlefonts', true);
+    }
+
+    /**
+     * @param string $url
+     *
+     * @return boolean|string The path of the cached file
+     */
+    public function makeCache($url, $extension) {
+
+        $hash = $this->generateHash($url);
+
+        $fileName              = $hash;
+        $fileNameWithExtension = $fileName . '.' . $extension;
+
+        $isCached = $this->exists($fileNameWithExtension);
+
+        if ($isCached) {
+            if (!$this->testManifestFile($fileName)) {
+                $isCached = false;
+            }
+        }
+
+        if (!$isCached) {
+
+            $cssContent = HttpClient::get($url);
+
+            if (!$cssContent) {
+                return false;
+            }
+
+            if ($extension === 'css') {
+                $fontExtensions = array(
+                    'woff2',
+                    'ttf'
+                );
+
+                foreach ($fontExtensions as $this->fontExtension) {
+                    $cssContent = preg_replace_callback('/url\(["\']?(.*?\.' . $this->fontExtension . ')["\']?\)/i', function ($matches) {
+
+                        $url = $matches[1];
+
+                        $cache = new CacheGoogleFont();
+
+                        $path = $cache->makeCache($url, $this->fontExtension);
+
+                        if ($path) {
+                            $url = Filesystem::pathToAbsoluteURL($path);
+                        }
+
+                        return 'url(' . $url . ')';
+                    }, $cssContent);
+                }
+            }
+
+            $this->set($fileNameWithExtension, $cssContent);
+
+            $this->createManifestFile($fileName);
+        }
+
+        return $this->getPath($fileNameWithExtension);
+    }
+
+    private function generateHash($url) {
+        return md5($url);
+    }
+
+    protected function testManifestFile($fileName) {
+        $manifestKey = $this->getManifestKey($fileName);
+        if ($this->exists($manifestKey)) {
+
+            $manifestData = json_decode($this->get($manifestKey), true);
+
+            if ($manifestData['mtime'] > strtotime('-30 days')) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    protected function createManifestFile($fileName) {
+
+        $this->set($this->getManifestKey($fileName), json_encode($this->getManifestData()));
+    }
+
+    private function getManifestData() {
+
+        return array(
+            'mtime' => time()
+        );
+    }
+
+    protected function getManifestKey($fileName) {
+        return $fileName . '.manifest';
+    }
+}