Implement cache for Plugin Manager

src/mibew/cron.php

@@ -33,7 +33,9 @@ $cache_factory->setOption('path', MIBEW_FS_ROOT . '/cache/stash');
 
 // Run plugins
 if (get_maintenance_mode() === false) {
-    PluginManager::getInstance()->loadPlugins($configs['plugins']);
+    $plugin_manager = PluginManager::getInstance();
+    $plugin_manager->setCache($cache_factory->getCache());
+    $plugin_manager->loadPlugins($configs['plugins']);
 }
 
 // Do the job.

src/mibew/index.php

@@ -43,7 +43,9 @@ $cache_factory->setOption('path', MIBEW_FS_ROOT . '/cache/stash');
 
 // Run plugins
 if (get_maintenance_mode() === false) {
-    PluginManager::getInstance()->loadPlugins($configs['plugins']);
+    $plugin_manager = PluginManager::getInstance();
+    $plugin_manager->setCache($cache_factory->getCache());
+    $plugin_manager->loadPlugins($configs['plugins']);
 }
 
 // The main route loader which loads nothig but works as a cache proxy for other

src/mibew/libs/classes/Mibew/Plugin/PluginManager.php

@@ -19,15 +19,18 @@
 
 namespace Mibew\Plugin;
 
+use Mibew\Cache\CacheAwareInterface;
 use Mibew\Plugin\Utils as PluginUtils;
 use Mibew\Maintenance\Utils as MaintenanceUtils;
+use Stash\Interfaces\PoolInterface;
 
 /**
  * Manage plugins.
  *
  * Implements singleton pattern.
  */
-class PluginManager
+class PluginManager implements
+    CacheAwareInterface
 {
     /**
      * An instance of Plugin Manager class.
@@ -35,6 +38,11 @@ class PluginManager
      */
     protected static $instance = null;
 
+    /**
+     * @var PoolInterface|null
+     */
+    protected $cache = null;
+
     /**
      * Contains all loaded plugins
      *
@@ -56,6 +64,22 @@ class PluginManager
         return self::$instance;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function setCache(PoolInterface $cache)
+    {
+        $this->cache = $cache;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCache()
+    {
+        return $this->cache;
+    }
+
     /**
      * Returns plugin instance.
      *