/**
* Generates JSON graph data and returns it.
*
* @param DataTable|DataTable\Map $dataTable
* @return string
*/
public function generate($dataTable)
{
$visualization = new Chart();
if ($dataTable->getRowsCount() > 0) {
// if addTotalRow was called in GenerateGraphHTML, add a row containing totals of
// different metrics
if ($this->properties['add_total_row']) {
$dataTable->queueFilter('AddSummaryRow', Piwik::translate('General_Total'));
}
$dataTable->applyQueuedFilters();
$this->initChartObjectData($dataTable, $visualization);
}
return $visualization->render();
}
/**
* Common filters for all Actions API
*
* @param DataTable|DataTable\Simple|DataTable\Map $dataTable
* @param bool $expanded
*/
protected function filterActionsDataTable($dataTable, $expanded = false)
{
// Must be applied before Sort in this case, since the DataTable can contain both int and strings indexes
// (in the transition period between pre 1.2 and post 1.2 datatable structure)
$dataTable->filter('ReplaceColumnNames');
$dataTable->filter('Sort', array('nb_visits', 'desc', $naturalSort = false, $expanded));
$dataTable->queueFilter('ReplaceSummaryRowLabel');
}