/**
* @return array
*/
protected function prepareValues()
{
$periods = $this->configuration->getPeriods();
$values = [];
foreach ($periods as $period) {
$values[$period->format($this->configuration->getGroupByDateFormat())] = ['value' => 0, 'meta' => $period->format($this->configuration->getDatePresentationFormat())];
}
return $values;
}
/**
* Filters a collection to get only current items
*
* @param Collection $collection
*
* @return Collection
*/
protected function filterCurrentItems(Collection $collection)
{
$endDate = new DateTime();
$format = $this->configuration->getGroupByDateFormat();
$identifier = $endDate->format($format);
return $collection->filter(function (ReportRow $row) use($identifier) {
return $row->getIdentifier() === $identifier;
});
}