/**
* Returns original filename if exists
*/
function _getOriginalFileName($id)
{
$metaFilePath = mediaMetaFN($id, '.filename');
$meta = unserialize(io_readFile($metaFilePath, false));
if (empty($meta['filename'])) {
// check old meta file (for backward compatibility)
$filename = parent::_getOriginalFileName($id);
// move old meta file to media_meta directory
if ($filename !== false) {
$oldMetaFilePath = metaFN($id, '.filename');
io_rename($oldMetaFilePath, $metaFilePath);
}
return $filename;
} else {
return $this->common->_sanitizeFileName($meta['filename']);
}
}
/**
* Return a list of page revisions numbers
* Does not guarantee that the revision exists in the attic,
* only that a line with the date exists in the changelog.
* By default the current revision is skipped.
*
* id: the page of interest
* first: skip the first n changelog lines
* num: number of revisions to return
*
* The current revision is automatically skipped when the page exists.
* See $INFO['meta']['last_change'] for the current revision.
*
* For efficiency, the log lines are parsed and cached for later
* calls to getRevisionInfo. Large changelog files are read
* backwards in chunks until the requested number of changelog
* lines are recieved.
*
* @author Ben Coburn <*****@*****.**>
* @author Kate Arzamastseva <*****@*****.**>
*/
function getRevisions($id, $first, $num, $chunk_size = 8192, $media = false)
{
global $cache_revinfo;
$cache =& $cache_revinfo;
if (!isset($cache[$id])) {
$cache[$id] = array();
}
$revs = array();
$lines = array();
$count = 0;
if ($media) {
$file = mediaMetaFN($id, '.changes');
} else {
$file = metaFN($id, '.changes');
}
$num = max($num, 0);
$chunk_size = max($chunk_size, 0);
if ($first < 0) {
$first = 0;
} else {
if (!$media && @file_exists(wikiFN($id)) || $media && @file_exists(mediaFN($id))) {
// skip current revision if the page exists
$first = max($first + 1, 0);
}
}
if (!@file_exists($file)) {
return $revs;
}
if (filesize($file) < $chunk_size || $chunk_size == 0) {
// read whole file
$lines = file($file);
if ($lines === false) {
return $revs;
}
} else {
// read chunks backwards
$fp = fopen($file, 'rb');
// "file pointer"
if ($fp === false) {
return $revs;
}
fseek($fp, 0, SEEK_END);
$tail = ftell($fp);
// chunk backwards
$finger = max($tail - $chunk_size, 0);
while ($count < $num + $first) {
fseek($fp, $finger);
$nl = $finger;
if ($finger > 0) {
fgets($fp);
// slip the finger forward to a new line
$nl = ftell($fp);
}
// was the chunk big enough? if not, take another bite
if ($nl > 0 && $tail <= $nl) {
$finger = max($finger - $chunk_size, 0);
continue;
} else {
$finger = $nl;
}
// read chunk
$chunk = '';
$read_size = max($tail - $finger, 0);
// found chunk size
$got = 0;
while ($got < $read_size && !feof($fp)) {
$tmp = @fread($fp, max($read_size - $got, 0));
if ($tmp === false) {
break;
}
//error state
$got += strlen($tmp);
$chunk .= $tmp;
}
$tmp = explode("\n", $chunk);
array_pop($tmp);
// remove trailing newline
// combine with previous chunk
$count += count($tmp);
$lines = array_merge($tmp, $lines);
// next chunk
if ($finger == 0) {
break;
} else {
$tail = $finger;
$finger = max($tail - $chunk_size, 0);
}
}
fclose($fp);
}
// skip parsing extra lines
$num = max(min(count($lines) - $first, $num), 0);
if ($first > 0 && $num > 0) {
$lines = array_slice($lines, max(count($lines) - $first - $num, 0), $num);
} else {
if ($first > 0 && $num == 0) {
$lines = array_slice($lines, 0, max(count($lines) - $first, 0));
} else {
if ($first == 0 && $num > 0) {
$lines = array_slice($lines, max(count($lines) - $num, 0));
}
}
}
// handle lines in reverse order
for ($i = count($lines) - 1; $i >= 0; $i--) {
$tmp = parseChangelogLine($lines[$i]);
if ($tmp !== false) {
$cache[$id][$tmp['date']] = $tmp;
$revs[] = $tmp['date'];
}
}
return $revs;
}
/**
* Restores an old revision of a media file
*
* @param string $image
* @param int $rev
* @param int $auth
* @return string - file's id
* @author Kate Arzamastseva <*****@*****.**>
*/
function media_restore($image, $rev, $auth)
{
global $conf;
if ($auth < AUTH_UPLOAD || !$conf['mediarevisions']) {
return false;
}
$removed = !file_exists(mediaFN($image)) && file_exists(mediaMetaFN($image, '.changes'));
if (!$image || !file_exists(mediaFN($image)) && !$removed) {
return false;
}
if (!$rev || !file_exists(mediaFN($image, $rev))) {
return false;
}
list(, $imime, ) = mimetype($image);
$res = media_upload_finish(mediaFN($image, $rev), mediaFN($image), $image, $imime, true, 'copy');
if (is_array($res)) {
msg($res[0], $res[1]);
return false;
}
return $res;
}
/**
* Prints the third column in full-screen media manager
* Depending on the opened tab this may be details of the
* selected file, the meta editing dialog or
* list of file revisions
*
* @author Kate Arzamastseva <*****@*****.**>
*/
function tpl_mediaFileDetails($image, $rev)
{
global $AUTH, $NS, $conf, $DEL, $lang, $INPUT;
$removed = !file_exists(mediaFN($image)) && file_exists(mediaMetaFN($image, '.changes')) && $conf['mediarevisions'];
if (!$image || !file_exists(mediaFN($image)) && !$removed || $DEL) {
return;
}
if ($rev && !file_exists(mediaFN($image, $rev))) {
$rev = false;
}
if (isset($NS) && getNS($image) != $NS) {
return;
}
$do = $INPUT->str('mediado');
$opened_tab = $INPUT->str('tab_details');
$tab_array = array('view');
list(, $mime) = mimetype($image);
if ($mime == 'image/jpeg') {
$tab_array[] = 'edit';
}
if ($conf['mediarevisions']) {
$tab_array[] = 'history';
}
if (!$opened_tab || !in_array($opened_tab, $tab_array)) {
$opened_tab = 'view';
}
if ($INPUT->bool('edit')) {
$opened_tab = 'edit';
}
if ($do == 'restore') {
$opened_tab = 'view';
}
media_tabs_details($image, $opened_tab);
echo '<div class="panelHeader"><h3>';
list($ext) = mimetype($image, false);
$class = preg_replace('/[^_\\-a-z0-9]+/i', '_', $ext);
$class = 'select mediafile mf_' . $class;
$tabTitle = '<strong><a href="' . ml($image) . '" class="' . $class . '" title="' . $lang['mediaview'] . '">' . $image . '</a>' . '</strong>';
if ($opened_tab === 'view' && $rev) {
printf($lang['media_viewold'], $tabTitle, dformat($rev));
} else {
printf($lang['media_' . $opened_tab], $tabTitle);
}
echo '</h3></div>' . NL;
echo '<div class="panelContent">' . NL;
if ($opened_tab == 'view') {
media_tab_view($image, $NS, $AUTH, $rev);
} elseif ($opened_tab == 'edit' && !$removed) {
media_tab_edit($image, $NS, $AUTH);
} elseif ($opened_tab == 'history' && $conf['mediarevisions']) {
media_tab_history($image, $NS, $AUTH);
}
echo '</div>' . NL;
}
/**
* Returns path to changelog
*
* @return string path to file
*/
protected function getChangelogFilename()
{
return mediaMetaFN($this->id, '.changes');
}
