Merge pull request #1250 from kartik-v/patch-1

Update Alert.php to display multiple flash messages for the session.

apps/advanced/frontend/widgets/Alert.php

@@ -7,42 +7,60 @@
 
 namespace frontend\widgets;
 
-use yii\helpers\Html;
-
 /**
- * Alert widget renders a message from session flash. You can set message as following:
+ * 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:
  *
  * - \Yii::$app->getSession()->setFlash('error', 'This is the message');
  * - \Yii::$app->getSession()->setFlash('success', 'This is the message');
  * - \Yii::$app->getSession()->setFlash('info', 'This is the message');
  *
+ * @author Kartik Visweswaran <kartikv2@gmail.com>
  * @author Alexander Makarov <sam@rmcerative.ru>
  */
-class Alert extends \yii\bootstrap\Alert
+class Alert extends \yii\bootstrap\Widget
 {
-	private $_doNotRender = false;
+	/**
+	 * @var array the alert types configuration for the flash messages.
+	 * This array is setup as $key => $value, where:
+	 * - $key is the name of the session flash variable
+	 * - $value is the bootstrap alert type (i.e. danger, success, info, warning)
+	 */
+	public $alertTypes = [
+		'error'   => 'danger', 
+		'danger'  => 'danger', 
+		'success' => 'success', 
+		'info'    => 'info', 
+		'warning' => 'warning'
+	];
+	 
+	/**
+	 * @var array the options for rendering the close button tag.
+	 */
+	public $closeButton = [];
+	
 	public function init()
 	{
-		if ($this->body = \Yii::$app->getSession()->getFlash('error', null, true)) {
-			Html::addCssClass($this->options, 'alert-danger');
-		} elseif ($this->body = \Yii::$app->getSession()->getFlash('success', null, true)) {
-			Html::addCssClass($this->options, 'alert-success');
-		} elseif ($this->body = \Yii::$app->getSession()->getFlash('info', null, true)) {
-			Html::addCssClass($this->options, 'alert-info');
-		} elseif ($this->body = \Yii::$app->getSession()->getFlash('warning', null, true)) {
-			Html::addCssClass($this->options, 'alert-warning');
-		} else {
-			$this->_doNotRender = true;
-			return;
-		}
-
 		parent::init();
-	}
 
-	public function run()
-	{
-		if (!$this->_doNotRender) {
-			parent::run();
+		$session = \Yii::$app->getSession();
+		$flashes = $session->getAllFlashes();
+		$appendCss = isset($this->options['class']) ? ' ' . $this->options['class'] : '';
+		
+		foreach ($flashes as $type => $message) {
+			/* initialize css class for each alert box */
+			$this->options['class'] = 'alert-' . $this->alertTypes[$type] . $appendCss; 
+
+			/* assign unique id to each alert box */
+			$this->options['id'] = $this->getId() . '-' . $type;
+
+			echo \yii\bootstrap\Alert::widget([
+				'body' => $message,
+				'closeButton' => $this->closeButton,
+				'options' => $this->options
+			]);
+
+			$session->removeFlash($type);
 		}
 	}
 }