/**
* Rolls back a filesystem transaction, it is safe to rollback when no transaction is in progress
*
* @return void
*/
public static function rollback()
{
if (self::$rollback_operations === NULL) {
return;
}
self::$rollback_operations = array_reverse(self::$rollback_operations);
foreach (self::$rollback_operations as $operation) {
switch ($operation['action']) {
case 'append':
$current_length = filesize($operation['filename']);
$handle = fopen($operation['filename'], 'r+');
ftruncate($handle, $current_length - $operation['length']);
fclose($handle);
break;
case 'delete':
self::updateDeletedMap($operation['filename'], debug_backtrace());
unlink($operation['filename']);
fFilesystem::updateFilenameMap($operation['filename'], '*DELETED at ' . time() . ' with token ' . uniqid('', TRUE) . '* ' . $operation['filename']);
break;
case 'write':
file_put_contents($operation['filename'], $operation['old_data']);
break;
case 'rename':
fFilesystem::updateFilenameMap($operation['new_name'], $operation['old_name']);
rename($operation['new_name'], $operation['old_name']);
break;
}
}
// All files to be deleted should have their backtraces erased
foreach (self::$commit_operations as $operation) {
if (isset($operation['object'])) {
self::updateDeletedMap($operation['object']->getPath(), NULL);
fFilesystem::updateFilenameMap($operation['object']->getPath(), preg_replace('#*DELETED at \\d+ with token [\\w.]+* #', '', $operation['filename']));
}
}
self::$commit_operations = NULL;
self::$rollback_operations = NULL;
}
/**
* Rolls back a filesystem transaction, it is safe to rollback when no transaction is in progress
*
* @return void
*/
public static function rollback()
{
self::$rollback_operations = array_reverse(self::$rollback_operations);
foreach (self::$rollback_operations as $operation) {
switch ($operation['action']) {
case 'delete':
self::updateExceptionMap($operation['filename'], new fProgrammerException('The action requested can not be performed because the file has been deleted'));
unlink($operation['filename']);
break;
case 'write':
file_put_contents($operation['filename'], $operation['old_data']);
break;
case 'rename':
fFilesystem::updateFilenameMap($operation['new_name'], $operation['old_name']);
rename($operation['new_name'], $operation['old_name']);
break;
}
}
// All files to be deleted should have their exceptions erased
foreach (self::$commit_operations as $operation) {
if (isset($operation['object'])) {
self::updateExceptionMap($operation['object']->getPath(), NULL);
}
}
self::$commit_operations = NULL;
self::$rollback_operations = NULL;
}
