Code cleanup.

Removed redundant declarations and checks in the code.

apps/advanced/frontend/widgets/Alert.php

@@ -7,10 +7,6 @@
 
 namespace frontend\widgets;
 
-use yii\helpers\Html;
-use yii\bootstrap\Widget;
-use yii\bootstrap\Alert as BsAlert;
-
 /**
  * Alert widget renders a message from session flash. All flash messages are displayed
  * in the sequence they were assigned using setFlash. You can set message as following:
@@ -22,7 +18,7 @@ use yii\bootstrap\Alert as BsAlert;
  * @author Alexander Makarov <sam@rmcerative.ru>
  * @author Kartik Visweswaran <kartikv2@gmail.com>
  */
-class Alert extends Widget
+class Alert extends \yii\bootstrap\Widget
 {
 	/**
 	 * @var array the allowed bootstrap alert types.
@@ -34,38 +30,23 @@ class Alert extends Widget
 	 */
 	public $closeButton = [];
 	
-	private $_doNotRender = true;
-	
 	public function init()
 	{
-		$this->_doNotRender = true;
 		$session = \Yii::$app->getSession();
-		$flashes = $session->getAllFlashes();
-		$baseCssClass = isset($this->options['class']) ? $this->options['class'] : '';
+		$appendCss = isset($this->options['class']) ? $this->options['class'] : '';
 
 		foreach ($flashes as $type => $message) {
 			if (in_array($type, $this->allowedTypes)) {
-				$this->options['class'] = (($type === 'error') ? "alert-danger" : "alert-{$type}") . ' ' . $baseCssClass;
-				echo BsAlert::widget([
+				$this->options['class'] = (($type === 'error') ? 'alert-danger' : 'alert-' . $type) . ' ' . $appendCss;
+				echo \yii\bootstrap\Alert::widget([
 					'body' => $message,
 					'closeButton' => $this->closeButton,
 					'options' => $this->options
 				]);
-				Html::removeCssClass($this->options, $class);
 				$session->removeFlash($type);
 				$this->_doNotRender = false;
 			}
 		}
-		
-		if (!$this->_doNotRender) {
-			parent::init();
-		}
-	}
-
-	public function run()
-	{
-		if (!$this->_doNotRender) {
-			parent::run();
-		}
+		parent::init();
 	}
 }