Ubuntu

site3 * site4 * site5 * site6 * site7 * ) * * it will format this to * * array( * site1 * group2 * site3 * site4 * site5 * site6 * site7 * ) * * and then apply the limit filter. * * Each group will not count into the limit/offset. This way, if one requests a limit of 50 sites, * we make sure to return 50 sites. * * @param $sites * @return array */ class NestedSitesLimiter extends BaseFilter { private $offset = 0; private $limit = 0; /** * @var Row[] */ private $rows = array(); /** * Constructor. * * @param DataTable $table The table to eventually filter. */ public function __construct($table, $offset, $limit) { parent::__construct($table); $this->offset = $offset; $this->limit = $limit; } /** * @param DataTable $table */ public function filter($table) { $numRows = 0; $lastGroupFromPreviousPage = null; foreach ($table->getRows() as $row) { $this->addRowIfNeeded($row, $numRows); $numRows++; $subtable = $row->getSubtable(); if ($subtable) { if (!$this->hasRows()) { $lastGroupFromPreviousPage = $row; } foreach ($subtable->getRows() as $subRow) { $this->addRowIfNeeded($subRow, $numRows); $numRows++; } $row->removeSubtable(); } if ($this->hasNumberOfRequestedRowsFound()) { break; } } $this->prependGroupIfFirstSiteBelongsToAGroupButGroupIsMissingInRows($lastGroupFromPreviousPage); $table->setRows($this->rows); } private function hasNumberOfRequestedRowsFound() { return count($this->rows) >= $this->limit; } private function hasRows() { return count($this->rows) !== 0; } private function addRowIfNeeded(Row $row, $numRows) { $inOffset = $numRows >= $this->offset; if ($inOffset && !$this->hasNumberOfRequestedRowsFound()) { $this->rows[] = $row; } } /** * @param Row $lastGroupFromPreviousPage */ private function prependGroupIfFirstSiteBelongsToAGroupButGroupIsMissingInRows($lastGroupFromPreviousPage) { if ($lastGroupFromPreviousPage && !empty($this->rows)) { // the result starts with a row that does belong to a group, we make sure to show this group before that site $group = reset($this->rows)->getMetadata('group'); if ($group && $lastGroupFromPreviousPage->getColumn('label') === $group) { array_unshift($this->rows, $lastGroupFromPreviousPage); // we do not remove the last item as it could result in errors, instead we show $limit+1 entries } } } }