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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\CoreHome\Columns\Metrics;
use Piwik\DataTable;
use Piwik\DataTable\Row;
use Piwik\Metrics\Formatter;
use Piwik\Piwik;
use Piwik\Plugin\ProcessedMetric;
/**
* Percent of visits in the whole table. Calculated as:
*
* nb_visits / sum(all nb_visits in table)
*
* nb_visits is calculated by core archiving process.
*/
class VisitsPercent extends ProcessedMetric
{
private $cachedTotalVisits = null;
private $forceTotalVisits = null;
/**
* Constructor.
*
* @param int|null $totalVisits The forced value of total visits to use.
*/
public function __construct($totalVisits = null)
{
$this->forceTotalVisits = $totalVisits;
}
public function getName()
{
return 'nb_visits_percentage';
}
public function getTranslatedName()
{
return Piwik::translate('General_ColumnPercentageVisits');
}
public function compute(Row $row)
{
$visits = $this->getMetric($row, 'nb_visits');
return Piwik::getQuotientSafe($visits, $this->cachedTotalVisits, $precision = 2);
}
public function format($value, Formatter $formatter)
{
return $formatter->getPrettyPercentFromQuotient($value);
}
public function getDependentMetrics()
{
return array('nb_visits');
}
public function beforeCompute($report, DataTable $table)
{
if ($this->forceTotalVisits === null) {
$this->cachedTotalVisits = array_sum($this->getMetricValues($table, 'nb_visits'));
} else {
$this->cachedTotalVisits = $this->forceTotalVisits;
}
return true; // always compute
}
}
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