private function getSortKeyForItem($item)
{
if ($item instanceof DIWikiPage) {
$label = $this->store->getWikiPageSortKey($item);
$value = $label;
} else {
$label = $item instanceof DIBlob ? $item->getString() : '';
$value = $item->getSortKey();
}
return array($label, $value);
}
/**
* Not in all cases can requestoptions be forwarded to the DB using
* getSQLConditions() and getSQLOptions(): some data comes from caches
* that do not respect the options yet. This method takes an array of
* results (SMWDataItem objects) *of the same type* and applies the
* given requestoptions as appropriate.
*
* @since 1.8
* @param array $data array of SMWDataItem objects
* @param SMWRequestOptions|null $requestoptions
*
* @return SMWDataItem[]
*/
public function applyRequestOptionsTo(array $data, RequestOptions $requestoptions = null)
{
if ($data === array() || $requestoptions === null) {
return $data;
}
$result = array();
$sortres = array();
$sampleDataItem = reset($data);
$numeric = is_numeric($sampleDataItem->getSortKey());
$i = 0;
foreach ($data as $item) {
$ok = true;
// keep datavalue only if this remains true
if ($item instanceof DIWikiPage) {
$label = $this->store->getWikiPageSortKey($item);
$value = $label;
} else {
$label = $item instanceof DIBlob ? $item->getString() : '';
$value = $item->getSortKey();
}
if ($requestoptions->boundary !== null) {
// apply value boundary
$strc = $numeric ? 0 : strcmp($value, $requestoptions->boundary);
if ($requestoptions->ascending) {
if ($requestoptions->include_boundary) {
$ok = $numeric ? $value >= $requestoptions->boundary : $strc >= 0;
} else {
$ok = $numeric ? $value > $requestoptions->boundary : $strc > 0;
}
} else {
if ($requestoptions->include_boundary) {
$ok = $numeric ? $value <= $requestoptions->boundary : $strc <= 0;
} else {
$ok = $numeric ? $value < $requestoptions->boundary : $strc < 0;
}
}
}
foreach ($requestoptions->getStringConditions() as $strcond) {
// apply string conditions
switch ($strcond->condition) {
case StringCondition::STRCOND_PRE:
$ok = $ok && strpos($label, $strcond->string) === 0;
break;
case StringCondition::STRCOND_POST:
$ok = $ok && strpos(strrev($label), strrev($strcond->string)) === 0;
break;
case StringCondition::STRCOND_MID:
$ok = $ok && strpos($label, $strcond->string) !== false;
break;
}
}
if ($ok) {
$result[$i] = $item;
$sortres[$i] = $value;
$i++;
}
}
if ($requestoptions->sort) {
$flag = $numeric ? SORT_NUMERIC : SORT_LOCALE_STRING;
if ($requestoptions->ascending) {
asort($sortres, $flag);
} else {
arsort($sortres, $flag);
}
$newres = array();
foreach ($sortres as $key => $value) {
$newres[] = $result[$key];
}
$result = $newres;
}
if ($requestoptions->limit > 0) {
$result = array_slice($result, $requestoptions->offset, $requestoptions->limit);
} else {
$result = array_slice($result, $requestoptions->offset);
}
return $result;
}
