/**
* The ImageBeforeProduce HTML hook, used here to provide datetime
* negotiation for embedded images.
*
* @param Skin $skin Skin object for this page
* @param Title $title Title object for this image
* @param File $file File object for this image
* @param array $frameParams frame parameters
* @param array $handlerParams handler parameters
* @param string $time not really used by hook
* @param string $res used to replace HTML for image rendering
*
* @return boolean indicating whether caller should use $res instead of
* default HTML for image rendering
*/
public function onImageBeforeProduceHTML(&$skin, &$title, &$file, &$frameParams, &$handlerParams, &$time, &$res)
{
global $wgMementoTimeNegotiationForThumbnails;
if ($wgMementoTimeNegotiationForThumbnails === true) {
if ($this->oldIDSet === true) {
$history = $file->getHistory(1, $this->articleDatetime);
$file = $history[0];
}
}
return true;
}
function doQuery()
{
if ($this->mQueryDone) {
return;
}
$this->mImg = $this->mImagePage->getFile();
// ensure loading
if (!$this->mImg->exists()) {
return;
}
$queryLimit = $this->mLimit + 1;
// limit plus extra row
if ($this->mIsBackwards) {
// Fetch the file history
$this->mHist = $this->mImg->getHistory($queryLimit, null, $this->mOffset, false);
// The current rev may not meet the offset/limit
$numRows = count($this->mHist);
if ($numRows <= $this->mLimit && $this->mImg->getTimestamp() > $this->mOffset) {
$this->mHist = array_merge(array($this->mImg), $this->mHist);
}
} else {
// The current rev may not meet the offset
if (!$this->mOffset || $this->mImg->getTimestamp() < $this->mOffset) {
$this->mHist[] = $this->mImg;
}
// Old image versions (fetch extra row for nav links)
$oiLimit = count($this->mHist) ? $this->mLimit : $this->mLimit + 1;
// Fetch the file history
$this->mHist = array_merge($this->mHist, $this->mImg->getHistory($oiLimit, $this->mOffset, null, false));
}
$numRows = count($this->mHist);
// Total number of query results
if ($numRows) {
# Index value of top item in the list
$firstIndex = $this->mIsBackwards ? $this->mHist[$numRows - 1]->getTimestamp() : $this->mHist[0]->getTimestamp();
# Discard the extra result row if there is one
if ($numRows > $this->mLimit && $numRows > 1) {
if ($this->mIsBackwards) {
# Index value of item past the index
$this->mPastTheEndIndex = $this->mHist[0]->getTimestamp();
# Index value of bottom item in the list
$lastIndex = $this->mHist[1]->getTimestamp();
# Display range
$this->mRange = array(1, $numRows - 1);
} else {
# Index value of item past the index
$this->mPastTheEndIndex = $this->mHist[$numRows - 1]->getTimestamp();
# Index value of bottom item in the list
$lastIndex = $this->mHist[$numRows - 2]->getTimestamp();
# Display range
$this->mRange = array(0, $numRows - 2);
}
} else {
# 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 = '';
# Index value of bottom item in the list
$lastIndex = $this->mIsBackwards ? $this->mHist[0]->getTimestamp() : $this->mHist[$numRows - 1]->getTimestamp();
# Display range
$this->mRange = array(0, $numRows - 1);
}
} else {
$firstIndex = '';
$lastIndex = '';
$this->mPastTheEndIndex = '';
}
if ($this->mIsBackwards) {
$this->mIsFirst = $numRows < $queryLimit;
$this->mIsLast = $this->mOffset == '';
$this->mLastShown = $firstIndex;
$this->mFirstShown = $lastIndex;
} else {
$this->mIsFirst = $this->mOffset == '';
$this->mIsLast = $numRows < $queryLimit;
$this->mLastShown = $lastIndex;
$this->mFirstShown = $firstIndex;
}
$this->mQueryDone = true;
}
/**
* If a file is deleted, check if the sha1 (and timestamp?) exist in the
* approved_revs_files table, and delete that row accordingly. A deleted
* version of a file should not be the approved version!
**/
public static function onFileDeleteComplete(File $file, $oldimage, $article, $user, $reason)
{
$dbr = wfGetDB(DB_SLAVE);
// check if this file has an approved revision
$approvedFile = $dbr->selectRow('approved_revs_files', array('approved_timestamp', 'approved_sha1'), array('file_title' => $file->getTitle()->getDBkey()));
// If an approved revision exists, loop through all files in history.
// Since this hook happens AFTER deletion (there is no hook before deletion), check to see
// if the sha1 of the approved revision is NOT in the history. If it is not in the history,
// then it has no business being in the approved_revs_files table, and should be deleted.
if ($approvedFile) {
$revs = array();
$approvedExists = false;
$hist = $file->getHistory();
foreach ($hist as $OldLocalFile) {
// need to check both sha1 and timestamp, since reverted files can have the same
// sha1, but different timestamps
if ($OldLocalFile->getTimestamp() == $approvedFile->approved_timestamp && $OldLocalFile->getSha1() == $approvedFile->approved_sha1) {
$approvedExists = true;
}
}
if (!$approvedExists) {
ApprovedRevs::unsetApprovedFileInDB($file->getTitle());
}
}
return true;
}
