email errors in yii2-audit

AuditController.php

<?php

namespace bedezign\yii2\audit\commands;

use bedezign\yii2\audit\models\AuditEntry;
use bedezign\yii2\audit\models\AuditError;
use Yii;
use yii\helpers\Html;

/**
 * Task runner commands for Auditing.
 *
 * @package bedezign\yii2\audit\commands
 */
class AuditController extends \yii\console\Controller
{

    /**
     * Email errors to support email.
     */
    public function actionErrorEmail()
    {
        $batch = AuditError::find()
            ->andWhere(['>', 'error_count', 0])
            ->andWhere(['emailed' => 0])
            ->batch();

        $email = Yii::$app->params['supportEmail'];

        // TODO - get absolute url
        //$request = Yii::$app->request;
        //$baseUrl = $request->getHostInfo() . $request->getBaseUrl();

        foreach ($batch as $auditErrors) {
            /** @var AuditError $model */
            foreach ($auditErrors as $model) {
                $params = [
                    ':message' => $model->message,
                    ':file' => $model->file,
                    ':line' => $model->line,
                    ':link' => Html::a(Yii::t('audit', 'view audit entry'), ['auditing/default/view', 'id' => $model->audit_id]),
                ];
                Yii::$app->mail->compose()
                    ->setFrom([$email => 'Audit :: ' . Yii::$app->name])
                    ->setTo($email)
                    ->setSubject('Audit Error in Audit Entry #' . $model->id)
                    ->setTextBody(Yii::t('app', ':message' . "\n" . 'in :file on line :line.' . "\n" . ':link.', $params))
                    ->setHtmlBody(Yii::t('app', '<b>:message</b><br />in <i>:file</i> on line <i>:line</i>.<br/>:link.', $params))
                    ->send();
            }
        }

    }

}