/**
* Extract some useful data from the result object for use by
* the navigation bar, put it into $this
*/
function extractResultInfo($offset, $limit, ResultWrapper $res)
{
$numRows = $res->numRows();
if ($numRows) {
$row = $res->fetchRow();
$firstIndex = $row[$this->mIndexField];
# Discard the extra result row if there is one
if ($numRows > $this->mLimit && $numRows > 1) {
$res->seek($numRows - 1);
$this->mPastTheEndRow = $res->fetchObject();
$indexField = $this->mIndexField;
$this->mPastTheEndIndex = $this->mPastTheEndRow->{$indexField};
$res->seek($numRows - 2);
$row = $res->fetchRow();
$lastIndex = $row[$this->mIndexField];
} else {
$this->mPastTheEndRow = null;
# Setting indexes to an empty string means that they will be
# omitted if they would otherwise appear in URLs. It just so
# happens that this is the right thing to do in the standard
# UI, in all the relevant cases.
$this->mPastTheEndIndex = '';
$res->seek($numRows - 1);
$row = $res->fetchRow();
$lastIndex = $row[$this->mIndexField];
}
} else {
$firstIndex = '';
$lastIndex = '';
$this->mPastTheEndRow = null;
$this->mPastTheEndIndex = '';
}
if ($this->mIsBackwards) {
$this->mIsFirst = $numRows < $limit;
$this->mIsLast = $offset == '';
$this->mLastShown = $firstIndex;
$this->mFirstShown = $lastIndex;
} else {
$this->mIsFirst = $offset == '';
$this->mIsLast = $numRows < $limit;
$this->mLastShown = $lastIndex;
$this->mFirstShown = $firstIndex;
}
}
/**
* Invalidate a set of IDs, right now
*/
function invalidateIDs(ResultWrapper $res)
{
global $wgUseFileCache, $wgUseSquid;
if ($res->numRows() == 0) {
return;
}
$dbw =& wfGetDB(DB_MASTER);
$timestamp = $dbw->timestamp();
$done = false;
while (!$done) {
# Get all IDs in this query into an array
$ids = array();
for ($i = 0; $i < $this->mRowsPerQuery; $i++) {
$row = $res->fetchRow();
if ($row) {
$ids[] = $row[0];
} else {
$done = true;
break;
}
}
if (!count($ids)) {
break;
}
# Update page_touched
$dbw->update('page', array('page_touched' => $timestamp), array('page_id IN (' . $dbw->makeList($ids) . ')'), __METHOD__);
# Update squid
if ($wgUseSquid || $wgUseFileCache) {
$titles = Title::newFromIDs($ids);
if ($wgUseSquid) {
$u = SquidUpdate::newFromTitles($titles);
$u->doUpdate();
}
# Update file cache
if ($wgUseFileCache) {
foreach ($titles as $title) {
$cm = new CacheManager($title);
@unlink($cm->fileCacheName());
}
}
}
}
}
/**
* Extract some useful data from the result object for use by
* the navigation bar, put it into $this
*
* @param $isFirst bool: False if there are rows before those fetched (i.e.
* if a "previous" link would make sense)
* @param $limit Integer: exact query limit
* @param $res ResultWrapper
*/
function extractResultInfo( $isFirst, $limit, ResultWrapper $res ) {
$numRows = $res->numRows();
if ( $numRows ) {
# Remove any table prefix from index field
$parts = explode( '.', $this->mIndexField );
$indexColumn = end( $parts );
$row = $res->fetchRow();
$firstIndex = $row[$indexColumn];
# Discard the extra result row if there is one
if ( $numRows > $this->mLimit && $numRows > 1 ) {
$res->seek( $numRows - 1 );
$this->mPastTheEndRow = $res->fetchObject();
$this->mPastTheEndIndex = $this->mPastTheEndRow->$indexColumn;
$res->seek( $numRows - 2 );
$row = $res->fetchRow();
$lastIndex = $row[$indexColumn];
} else {
$this->mPastTheEndRow = null;
# Setting indexes to an empty string means that they will be
# omitted if they would otherwise appear in URLs. It just so
# happens that this is the right thing to do in the standard
# UI, in all the relevant cases.
$this->mPastTheEndIndex = '';
$res->seek( $numRows - 1 );
$row = $res->fetchRow();
$lastIndex = $row[$indexColumn];
}
} else {
$firstIndex = '';
$lastIndex = '';
$this->mPastTheEndRow = null;
$this->mPastTheEndIndex = '';
}
if ( $this->mIsBackwards ) {
$this->mIsFirst = ( $numRows < $limit );
$this->mIsLast = $isFirst;
$this->mLastShown = $firstIndex;
$this->mFirstShown = $lastIndex;
} else {
$this->mIsFirst = $isFirst;
$this->mIsLast = ( $numRows < $limit );
$this->mLastShown = $lastIndex;
$this->mFirstShown = $firstIndex;
}
}
/**
* Invalidate a set of IDs, right now
*/
public function invalidateIDs(ResultWrapper $res)
{
global $wgUseFileCache, $wgUseSquid;
if ($res->numRows() == 0) {
return;
}
// sanity check
$dbw = wfGetDB(DB_MASTER);
$timestamp = $dbw->timestamp();
$done = false;
while (!$done) {
# Get all IDs in this query into an array
$ids = array();
for ($i = 0; $i < $this->mRowsPerQuery; $i++) {
$row = $res->fetchRow();
if ($row) {
$ids[] = $row[0];
} else {
$done = true;
break;
}
}
if (count($ids) == 0) {
break;
}
# Update page_touched
$dbw->update('page', array('page_touched' => $timestamp), array('page_id' => $ids), __METHOD__);
# Update static caches
if ($wgUseSquid || $wgUseFileCache) {
$titles = Title::newFromIDs($ids);
# Update squid cache
if ($wgUseSquid) {
$u = SquidUpdate::newFromTitles($titles);
$u->doUpdate();
}
# Update file cache
if ($wgUseFileCache) {
foreach ($titles as $title) {
HTMLFileCache::clearFileCache($title);
}
}
}
}
}
