/**
* Sets the total evolution metadata for a datatable returned by $this->buildDataTable
* given data for the last period.
*
* @param Piwik_DataTable $dataTable
* @param Piwik_DataTable $pastData
* @param array $apiMetrics Metrics info.
*/
private function setPastDataMetadata($dataTable, $pastData, $apiMetrics)
{
if ($dataTable instanceof Piwik_DataTable_Array) {
$pastArray = $pastData->getArray();
foreach ($dataTable->getArray() as $subTable) {
$this->setPastDataMetadata($subTable, current($pastArray), $apiMetrics);
next($pastArray);
}
} else {
// calculate total visits/actions/revenue for past data
$this->setMetricsTotalsMetadata($pastData, $apiMetrics);
foreach ($apiMetrics as $label => $metricInfo) {
// get the names of metadata to set
$totalMetadataName = self::getTotalMetadataName($label);
$lastPeriodTotalMetadataName = self::getLastPeriodMetadataName($totalMetadataName);
$totalEvolutionMetadataName = self::getTotalMetadataName($metricInfo[self::METRIC_EVOLUTION_COL_NAME_KEY]);
// set last period total
$pastTotal = $pastData->getMetadata($totalMetadataName);
$dataTable->setMetadata($lastPeriodTotalMetadataName, $pastTotal);
// calculate & set evolution
$currentTotal = $dataTable->getMetadata($totalMetadataName);
$evolution = Piwik_MultiSites_CalculateEvolutionFilter::calculate($currentTotal, $pastTotal);
$dataTable->setMetadata($totalEvolutionMetadataName, $evolution);
}
}
}
