<?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\Plugins\Goals\Columns\Metrics\GoalSpecific;

use Piwik\Columns\Dimension;
use Piwik\DataTable\Row;
use Piwik\Metrics\Formatter;
use Piwik\Piwik;
use Piwik\Metrics;
use Piwik\Plugins\Goals\Columns\Metrics\GoalSpecificProcessedMetric;
use Piwik\Plugins\Goals\Goals;
/**
 * The entry page conversion rate for a specific goal. Calculated as:
 *
 *     goal's nb_conversions_entry / entry_nb_visits
 *
 * The goal's nb_conversions_entry and entry_nb_visits is calculated by the Goal archiver.
 */
class ConversionEntryRate extends GoalSpecificProcessedMetric
{
    public function getName()
    {
        return Goals::makeGoalColumn($this->idGoal, 'nb_conversions_entry_rate', \false);
    }
    public function getTranslatedName()
    {
        return Piwik::translate('Goals_ConversionRate', $this->getGoalName());
    }
    public function getDocumentation()
    {
        return Piwik::translate('Goals_ColumnConversionEntryRateDocumentation', $this->getGoalNameForDocs());
    }
    public function getDependentMetrics()
    {
        return ['goals', 'entry_nb_visits'];
    }
    public function compute(Row $row)
    {
        $mappingFromNameToIdGoal = Metrics::getMappingFromNameToIdGoal();
        $goalMetrics = $this->getGoalMetrics($row);
        $nbEntrances = $this->getMetric($row, 'entry_nb_visits');
        $conversions = $this->getMetric($goalMetrics, 'nb_conversions_entry', $mappingFromNameToIdGoal);
        if ($nbEntrances !== \false && is_numeric($nbEntrances) && $nbEntrances > 0) {
            return Piwik::getQuotientSafe($conversions, $nbEntrances, 3);
        }
        return 0;
    }
    public function format($value, Formatter $formatter)
    {
        return $formatter->getPrettyPercentFromQuotient($value);
    }
    public function getSemanticType() : ?string
    {
        return Dimension::TYPE_PERCENT;
    }
}
