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Edit File: ComputedMetricFactory.php

<?php /** * Matomo - free/libre analytics platform * * @link https://matomo.org * @license https://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later */ namespace Piwik\Columns; use Piwik\Plugin\ArchivedMetric; use Piwik\Plugin\ComputedMetric; /** * A factory to create computed metrics. * * @api since Piwik 3.2.0 */ class ComputedMetricFactory { /** * @var MetricsList */ private $metricsList = null; /** * Generates a new report metric factory. * @param MetricsList $list A report list instance * @ignore */ public function __construct(\Piwik\Columns\MetricsList $list) { $this->metricsList = $list; } /** * @return \Piwik\Plugin\ComputedMetric */ public function createComputedMetric($metricName1, $metricName2, $aggregation) { $metric1 = $this->metricsList->getMetric($metricName1); if (!$metric1 instanceof ArchivedMetric || !$metric1->getDimension()) { throw new \Exception('Only possible to create computed metric for an archived metric with a dimension'); } $dimension1 = $metric1->getDimension(); $metric = new ComputedMetric($metricName1, $metricName2, $aggregation); $metric->setCategory($dimension1->getCategoryId()); return $metric; } }