Dominus77 / yii2-basic-start

widgets/Alert.php

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

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\bootstrap\Widget
{
    /**
     * @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' => 'alert-danger',
        'danger' => 'alert-danger',
        'success' => 'alert-success',
        'info' => 'alert-info',
        'warning' => 'alert-warning'
    ];
    /**
     * @var array the options for rendering the close button tag.
     */
    public $closeButton = [];


    public function init()
    {
        parent::init();
        $session = Yii::$app->session;
        $flashes = $session->getAllFlashes();

The method getAllFlashes() does not exist on null.

        $appendCss = isset($this->options['class']) ? ' ' . $this->options['class'] : '';
        foreach ($flashes as $type => $data) {
            if (isset($this->alertTypes[$type])) {
                $data = (array)$data;
                $this->processTypes($this->alertTypes[$type], $data, $appendCss);
                $session->removeFlash($type);
            }
        }
    }

    /**
     * @param string $type
     * @param array $data
     * @param string $appendCss
     * @throws \Exception
     */
    protected function processTypes($type, $data, $appendCss)
    {
        foreach ($data as $i => $message) {
            /** initialize css class for each alert box */
            $this->options['class'] = $type . $appendCss;

            /** assign unique id to each alert box */
            $this->options['id'] = $this->getId() . '-' . $type . '-' . $i;
            $this->renderFlash($message);
        }
    }

    /**
     * @param array $message
     * @throws \Exception
     */
    protected function renderFlash($message)
    {
        echo \yii\bootstrap\Alert::widget([
            'body' => $message,
            'closeButton' => $this->closeButton,
            'options' => $this->options,
        ]);
    }
}