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msd2/tracking/piwik/plugins/Goals/Columns/Metrics/GoalConversionRate.php

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+<?php
+/**
+ * Matomo - free/libre analytics platform
+ *
+ * @link https://matomo.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ */
+namespace Piwik\Plugins\Goals\Columns\Metrics;
+
+use Piwik\DataTable\Row;
+use Piwik\Metrics\Formatter;
+use Piwik\Piwik;
+use Piwik\Plugins\Goals\Goals;
+use Piwik\Tracker\GoalManager;
+
+/**
+ * The conversion rate for a specific goal. Calculated as:
+ *
+ *     goal's nb_conversions / nb_visits
+ *
+ * The goal's nb_conversions is calculated by the Goal archiver and nb_visits
+ * by the core archiving process.
+ */
+class GoalConversionRate extends GoalSpecificProcessedMetric
+{
+
+    public function getName()
+    {
+        return Goals::makeGoalColumn($this->idGoal, 'conversion_rate');
+    }
+
+    public function getTranslatedName()
+    {
+        return Piwik::translate('Goals_ConversionRate', $this->getGoalName());
+    }
+
+    public function getDocumentation()
+    {
+        return Piwik::translate('Goals_ColumnConversionRateDocumentation', $this->getGoalNameForDocs());
+    }
+
+    public function getDependentMetrics()
+    {
+        return array('nb_visits', Goals::makeGoalColumn($this->idGoal, 'nb_conversions'));
+    }
+
+    public function format($value, Formatter $formatter)
+    {
+        return $formatter->getPrettyPercentFromQuotient($value);
+    }
+
+    public function compute(Row $row)
+    {
+        $nbVisits = $this->getMetric($row, 'nb_visits');
+        $conversions = $this->getMetric($row, Goals::makeGoalColumn($this->idGoal, 'nb_visits_converted'));
+
+        return Piwik::getQuotientSafe($conversions, $nbVisits, GoalManager::REVENUE_PRECISION + 2);
+    }
+}