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<?php
namespace Drupal\Core\Database\Query;
use Drupal\Core\Database\Connection;
/**
* Query extender class for tablesort queries.
*/
class TableSortExtender extends SelectExtender {
/**
* The array of fields that can be sorted by.
*/
protected $header = array();
public function __construct(SelectInterface $query, Connection $connection) {
parent::__construct($query, $connection);
// Add convenience tag to mark that this is an extended query. We have to
// do this in the constructor to ensure that it is set before preExecute()
// gets called.
$this->addTag('tablesort');
}
/**
* Order the query based on a header array.
*
* @param array $header
* Table header array.
*
Jennifer Hodgdon
committed
* @return \Drupal\Core\Database\Query\SelectInterface
* The called object.
*
* @see table.html.twig
*/
public function orderByHeader(array $header) {
$this->header = $header;
$ts = $this->init();
if (!empty($ts['sql'])) {
// Based on code from db_escape_table(), but this can also contain a dot.
$field = preg_replace('/[^A-Za-z0-9_.]+/', '', $ts['sql']);
catch
committed
// orderBy() will ensure that only ASC/DESC values are accepted, so we
// don't need to sanitize that here.
$this->orderBy($field, $ts['sort']);
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}
return $this;
}
/**
* Initialize the table sort context.
*/
protected function init() {
$ts = $this->order();
$ts['sort'] = $this->getSort();
$ts['query'] = $this->getQueryParameters();
return $ts;
}
/**
* Determine the current sort direction.
*
* @return
* The current sort direction ("asc" or "desc").
*
* @see tablesort_get_sort()
*/
protected function getSort() {
return tablesort_get_sort($this->header);
}
/**
* Compose a URL query parameter array to append to table sorting requests.
*
* @return
* A URL query parameter array that consists of all components of the current
* page request except for those pertaining to table sorting.
*
* @see tablesort_get_query_parameters()
*/
protected function getQueryParameters() {
return tablesort_get_query_parameters();
}
/**
* Determine the current sort criterion.
*
* @return
* An associative array describing the criterion, containing the keys:
* - "name": The localized title of the table column.
* - "sql": The name of the database field to sort on.
*
* @see tablesort_get_order()
*/
protected function order() {
return tablesort_get_order($this->header);
}