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wp-content/plugins/shortpixel-image-optimiser/class/external/cache.php

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+<?php
+namespace ShortPixel;
+
+if ( ! defined( 'ABSPATH' ) ) {
+ exit; // Exit if accessed directly.
+}
+
+use ShortPixel\ShortPixelLogger\ShortPixelLogger as Log;
+
+class cacheRemover
+{
+    protected $has_supercache  = false; // supercache seems to replace quite fine, without our help. @todo Test if this is needed
+    protected $has_w3tc = false;
+    protected $has_wpengine = false;
+    protected $has_fastestcache = false;
+    protected $has_siteground = false;
+    protected $has_litespeed = false;
+
+		private static $instance;
+
+    public function __construct()
+    {
+			 $this->addHooks();
+			 $this->checkCaches();
+    }
+
+		public static function getInstance()
+		{
+			 if (is_null(self::$instance))
+			 	self::$instance = new cacheRemover();
+
+			return self::$instance;
+		}
+
+		public function addHooks()
+		{
+			add_action('shortpixel/image/optimised', array($this, 'flushCache'));
+		}
+
+    /** Checks which cache plugins are active on the moment a flush is needed */
+    public function checkCaches()
+    {
+      if ( function_exists( 'w3tc_pgcache_flush' ) )
+        $this->has_w3tc = true;
+
+      if ( function_exists('wp_cache_clean_cache') )
+        $this->has_supercache = true;
+
+      if ( class_exists( 'WpeCommon' ) )
+          $this->has_wpengine = true;
+
+      global $wp_fastest_cache;
+      if ( method_exists( 'WpFastestCache', 'deleteCache' ) && !empty( $wp_fastest_cache ) )
+          $this->has_fastestcache = true;
+
+      // SG SuperCacher
+      if (function_exists('sg_cachepress_purge_cache')) {
+	        $this->has_siteground = true;
+      }
+
+      if (defined( 'LSCWP_DIR' ))
+      {
+          $this->has_litespeed = true;
+      }
+
+      // @todo WpRocket?
+      // @todo BlueHost Caching?
+    }
+
+    /* Tries to flush cache there were we have issues
+    *
+    * @param Array $args Argument Array to provide data.
+    */
+    public function flushCache($imageItem)
+    {
+        if ($imageItem->get('type') == 'custom')
+				{
+					$post_id = 0;
+				}
+				else {
+					$post_id = $imageItem->get('id');
+				}
+
+        // important - first check the available cache plugins
+        $this->checkCaches();
+
+        $bool = apply_filters('shortpixel/external/flush_cache', true, $post_id, $imageItem);
+        if (false === $bool)
+        {
+           return false;
+        }
+
+        // general WP
+        if ($post_id > 0)
+          clean_post_cache($post_id);
+        else
+          wp_cache_flush();
+
+        /*  Verified working without.
+          if ($this->has_supercache)
+            $this->removeSuperCache();
+        */
+        if ($this->has_w3tc)
+            $this->removeW3tcCache();
+
+        if ($this->has_wpengine)
+            $this->removeWpeCache();
+
+        if ($this->has_siteground)
+            $this->removeSiteGround();
+
+        if ($this->has_fastestcache)
+            $this->removeFastestCache();
+
+        if ($this->has_litespeed)
+            $this->litespeedReset($imageItem);
+
+    }
+
+    protected function removeSuperCache()
+    {
+       global $file_prefix, $supercachedir;
+	     if ( empty( $supercachedir ) && function_exists( 'get_supercache_dir' ) ) {
+	          $supercachedir = get_supercache_dir();
+	     }
+	     wp_cache_clean_cache( $file_prefix );
+    }
+
+    protected function removeW3tcCache()
+    {
+      w3tc_pgcache_flush();
+    }
+
+    protected function removeWpeCache()
+    {
+      if ( method_exists( 'WpeCommon', 'purge_memcached' ) ) {
+          \WpeCommon::purge_memcached();
+      }
+      if ( method_exists( 'WpeCommon', 'clear_maxcdn_cache' ) ) {
+          \WpeCommon::clear_maxcdn_cache();
+      }
+      if ( method_exists( 'WpeCommon', 'purge_varnish_cache' ) ) {
+          \WpeCommon::purge_varnish_cache();
+      }
+    }
+
+    protected function removeFastestCache()
+    {
+      global $wp_fastest_cache;
+      $wp_fastest_cache->deleteCache();
+    }
+
+    protected function removeSiteGround()
+    {
+    		sg_cachepress_purge_cache();
+    }
+
+    protected function litespeedReset($imageItem)
+    {
+      // Suppress the notices on purge.
+      if (! defined( 'LITESPEED_PURGE_SILENT' ))
+      {
+         define('LITESPEED_PURGE_SILENT', true);
+      }
+
+			$urls = $imageItem->getAllUrls();
+			foreach($urls as $url)
+			{
+				 do_action('litespeed_purge_url', $url, false, true);
+			}
+  //    do_action('litespeed_media_reset', $post_id);
+    }
+
+}
+
+cacheRemover::getInstance();