/**
* method contains cache use decision logic
*
* @return bool see useCache()
*/
public function _useCache()
{
global $conf;
if (!parent::_useCache()) {
return false;
}
if (!isset($this->page)) {
return true;
}
if ($this->_time < @filemtime(metaFN($this->page, '.meta'))) {
return false;
}
// meta cache older than file it depends on?
// check current link existence is consistent with cache version
// first check the purgefile
// - if the cache is more recent than the purgefile we know no links can have been updated
if ($this->_time >= @filemtime($conf['cachedir'] . '/purgefile')) {
return true;
}
// for wiki pages, check metadata dependencies
$metadata = p_get_metadata($this->page);
if (!isset($metadata['relation']['references']) || empty($metadata['relation']['references'])) {
return true;
}
foreach ($metadata['relation']['references'] as $id => $exists) {
if ($exists != page_exists($id, '', false)) {
return false;
}
}
return true;
}
function _useCache()
{
global $conf;
if (!parent::_useCache()) {
return false;
}
// for wiki pages, check metadata dependencies
if (isset($this->page)) {
$metadata = p_get_metadata($this->page);
// check currnent link existence is consistent with cache version
// first check the purgefile
// - if the cache is more recent that the purgefile we know no links can have been updated
if ($this->_time < @filemtime($conf['cachedir'] . '/purgefile')) {
# $links = p_get_metadata($this->page,"relation references");
$links = $metadata['relation']['references'];
if (!empty($links)) {
foreach ($links as $id => $exists) {
if ($exists != @file_exists(wikiFN($id, '', false))) {
return false;
}
}
}
}
}
return true;
}
