yii2-bootstrap/extensions/yii/debug/panels/LogPanel.php

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

namespace yii\debug\panels;

use Yii;
use yii\debug\Panel;
use yii\log\Logger;
use yii\debug\models\search\Log;

/**
 * Debugger panel that collects and displays logs.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class LogPanel extends Panel
{

	/**
	 * @var array log messages extracted to array as models, to use with data provider.
	 */
	private $_models;

	public function getName()
	{
		return 'Logs';
	}

	public function getSummary()
	{
		return Yii::$app->view->render('panels/log/summary', ['data' => $this->data, 'panel' => $this]);
	}

	public function getDetail()
	{
		$searchModel = new Log();
		$dataProvider = $searchModel->search(Yii::$app->request->get(), $this->getModels());

		return Yii::$app->view->render('panels/log/detail', [
			'dataProvider' => $dataProvider, 
			'panel' => $this,
			'searchModel' => $searchModel,
		]);
	}

	public function save()
	{
		$target = $this->module->logTarget;
		$messages = $target->filterMessages($target->messages, Logger::LEVEL_ERROR | Logger::LEVEL_INFO | Logger::LEVEL_WARNING | Logger::LEVEL_TRACE);
		return ['messages' => $messages];
	}

	/**
	 * Returns array of models that represents logs of the current request. Can be used with data providers,
	 * like yii\data\ArrayDataProvider.
	 * @param boolean $refresh if needed to build models from log messages and refresh them.
	 * @return array models
	 */
	protected function getModels($refresh = false)
	{
		if ($this->_models === null || $refresh) {
			$this->_models = [];

			foreach($this->data['messages'] as $message) {
				$this->_models[] = 	[
					'message' => $message[0],
					'level' => $message[1],
					'category' => $message[2],
					'time' => ($message[3] * 1000), // time in milliseconds
					'trace' => $message[4]
				];
			}
		}
		return $this->_models;
	}

}