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<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\debug\panels;
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use Yii;
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use yii\debug\Panel;
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use yii\log\Logger;
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use yii\debug\models\search\Db;
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/**
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* Debugger panel that collects and displays database queries performed.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class DbPanel extends Panel
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{
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/**
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* @var array db queries info extracted to array as models, to use with data provider.
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*/
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private $_models;
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/**
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* @var array current database request timings
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*/
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private $_timings;
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public function getName()
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{
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return 'Database';
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}
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public function getSummary()
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{
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$timings = $this->calculateTimings();
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$queryCount = count($timings);
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$queryTime = number_format($this->getTotalQueryTime($timings) * 1000) . ' ms';
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return Yii::$app->view->render('panels/db/summary',[
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'timings' => $this->calculateTimings(),
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'panel' => $this,
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'queryCount' => $queryCount,
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'queryTime' => $queryTime,
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]);
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}
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public function getDetail()
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{
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$searchModel = new Db();
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$dataProvider = $searchModel->search($_GET, $this->getModels());
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return Yii::$app->view->render('panels/db/detail',[
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'panel' => $this,
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'dataProvider' => $dataProvider,
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'searchModel' => $searchModel,
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]);
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}
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protected function calculateTimings()
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{
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if ($this->_timings !== null) {
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return $this->_timings;
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}
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$messages = $this->data['messages'];
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$timings = [];
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$stack = [];
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foreach ($messages as $i => $log) {
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list($token, $level, $category, $timestamp) = $log;
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$log[5] = $i;
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if ($level == Logger::LEVEL_PROFILE_BEGIN) {
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$stack[] = $log;
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} elseif ($level == Logger::LEVEL_PROFILE_END) {
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if (($last = array_pop($stack)) !== null && $last[0] === $token) {
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$timings[$last[5]] = [count($stack), $token, $last[3], $timestamp - $last[3], $last[4]];
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}
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}
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}
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$now = microtime(true);
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while (($last = array_pop($stack)) !== null) {
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$delta = $now - $last[3];
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$timings[$last[5]] = [count($stack), $last[0], $last[2], $delta, $last[4]];
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}
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ksort($timings);
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return $this->_timings = $timings;
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}
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public function save()
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{
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$target = $this->module->logTarget;
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$messages = $target->filterMessages($target->messages, Logger::LEVEL_PROFILE, ['yii\db\Command::query', 'yii\db\Command::execute']);
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return ['messages' => $messages];
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}
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/**
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* Returns total queries time.
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* @param array $timings
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* @return integer total time
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*/
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protected function getTotalQueryTime($timings)
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{
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$queryTime = 0;
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foreach ($timings as $timing) {
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$queryTime += $timing[3];
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}
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return $queryTime;
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}
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/**
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* Returns array of models that represents logs of the current request. Can be used with data providers,
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* like yii\data\ArrayDataProvider.
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* @return array models
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*/
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protected function getModels()
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{
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if ($this->_models === null) {
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$this->_models = [];
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$timings = $this->calculateTimings();
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foreach($timings as $dbTiming) {
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$this->_models[] = [
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'type' => $this->detectQueryType($dbTiming[1]),
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'query' => $dbTiming[1],
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'duration' => ($dbTiming[3] * 1000), #in milliseconds
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'trace' => $dbTiming[4],
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];
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}
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}
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return $this->_models;
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}
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/**
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* Detects databse timing type. Detecting is produced through simple parsing to the first space|tab|new row.
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* First word before space is timing type. If there is no such words, timing will have empty type.
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* @param string $timing timing procedure string
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* @return string query type select|insert|delete|etc
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*/
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protected function detectQueryType($timing)
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{
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$timing = ltrim($timing);
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preg_match('/^([a-zA-z]*)/', $timing, $matches);
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return count($matches) ? $matches[0] : '';
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}
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}
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