* @version $Revision: 17580 $ * @static */ class GalleryFileSystemEntityHelper_medium { /** * @see GalleryCoreApi::checkPathCollision */ function checkPathCollision($pathComponent, $parentId, $selfId=null) { global $gallery; $pathComponent = GalleryFileSystemEntityHelper_medium::_truncatePathComponent($pathComponent); $query = ' SELECT COUNT([GalleryChildEntity::id]) FROM [GalleryChildEntity], [GalleryFileSystemEntity] WHERE [GalleryChildEntity::parentId] = ? AND UPPER([GalleryFileSystemEntity::pathComponent]) = ? AND [GalleryChildEntity::id] = [GalleryFileSystemEntity::id] '; /* The check is case-insensitive since it should be DBMS / FS independent. */ $data = array((int)$parentId, GalleryUtilities::strToUpper($pathComponent)); if (isset($selfId)) { $query .= ' AND [GalleryChildEntity::id] <> ? '; $data[] = (int)$selfId; } list ($ret, $searchResults) = $gallery->search($query, $data); if ($ret) { return array($ret, null); } $result = $searchResults->nextResult(); $isCollision = ($result[0] > 0); return array(null, $isCollision); } /** * @see GalleryCoreApi::getLegalPathComponent */ function getLegalPathComponent($pathComponent, $parentId, $selfId=null, $forDirectory=false) { global $gallery; $platform =& $gallery->getPlatform(); /* Make sure our path component uses legal characters */ $pathComponent = $platform->legalizePathComponent(trim($pathComponent), $forDirectory); /* Get the parent, just to verify id is valid */ list ($ret, $parent) = GalleryCoreApi::loadEntitiesById($parentId, 'GalleryEntity'); if ($ret) { return array($ret, null); } /* Extract the file base and extension */ list ($fileBase, $extension) = GalleryUtilities::getFileNameComponents($pathComponent); if (!empty($extension)) { $extension = '.' . $extension; } /* * If given string was extended characters that were all converted to "_" then * autogenerate a new filename.. we'll use today's date. */ if (rtrim($fileBase, '_') == '') { $fileBase = $platform->strftime('%Y%m%d'); } /* * Try . * _001. * _002. * etc. * Don't be intimidated by the first 100 collisions */ $retry = 0; while (true) { $newPathComponent = GalleryFileSystemEntityHelper_medium::_truncatePathComponent( $fileBase, $retry > 0 ? sprintf('_%03d', $retry) : '', $extension); /* Make sure that we don't have a collision in the db. */ list ($ret, $isCollision) = GalleryFileSystemEntityHelper_medium::checkPathCollision( $newPathComponent, $parentId, $selfId); if ($ret) { return array($ret, null); } if (!$isCollision) { break; } if (++$retry > 100) { return array(GalleryCoreApi::error(ERROR_COLLISION), null); } } return array(null, $newPathComponent); } /** * Truncate the given path component to the maximum allowed length. * If an extension is given, it truncates the base and then appends the extension. * * @param string basename of path component * @param string variable part (optional), e.g. '_001' * @param string extension (optional), e.g. '.jpg' * @return string truncated path component * @access private */ function _truncatePathComponent($baseName, $variablePart='', $extension='') { $length = 128 - strlen($variablePart) - strlen($extension); $baseName = GalleryCoreApi::utf8Substring($baseName, 0, $length); return $baseName . $variablePart . $extension; } } ?>