<?php
  
  namespace app\widgets;
  
  use Yii;
  
  /**
   * 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:
   *
   * ```php
   * Yii::$app->session->setFlash('error', 'This is the message');
   * Yii::$app->session->setFlash('success', 'This is the message');
   * Yii::$app->session->setFlash('info', 'This is the message');
   * ```
   *
   * Multiple messages could be set as follows:
   *
   * ```php
   * Yii::$app->session->setFlash('error', ['Error 1', 'Error 2']);
   * ```
   *
   * @author Kartik Visweswaran <kartikv2@gmail.com>
   * @author Alexander Makarov <sam@rmcreative.ru>
   */
  class Alert extends \yii\bootstrap5\Widget
  {
      /**
       * @var array the alert types configuration for the flash messages.
       * This array is setup as $key => $value, where:
       * - key: the name of the session flash variable
       * - value: the bootstrap alert type (i.e. danger, success, info, warning)
       */
      public $alertTypes = [
          'error'   => 'alert-danger',
          'danger'  => 'alert-danger',
          'success' => 'alert-success',
          'info'    => 'alert-info',
          'warning' => 'alert-warning'
      ];
      /**
       * @var array the options for rendering the close button tag.
       * Array will be passed to [[\yii\bootstrap\Alert::closeButton]].
       */
      public $closeButton = [];
  
  
      /**
       * {@inheritdoc}
       */
      public function run()
      {
          $session = Yii::$app->session;
          $appendClass = isset($this->options['class']) ? ' ' . $this->options['class'] : '';
  
          foreach (array_keys($this->alertTypes) as $type) {
              $flash = $session->getFlash($type);
  
              foreach ((array) $flash as $i => $message) {
                  echo \yii\bootstrap5\Alert::widget([
                      'body' => $message,
                      'closeButton' => $this->closeButton,
                      'options' => array_merge($this->options, [
                          'id' => $this->getId() . '-' . $type . '-' . $i,
                          'class' => $this->alertTypes[$type] . $appendClass,
                      ]),
                  ]);
              }
  
              $session->removeFlash($type);
          }
      }
  }