/**
* This method implements the index/deduplication functionality of Syncany. It uses a {@link
* Deduper} to break files down, compares them to the local database and creates a new {@link
* DatabaseVersion} as a result.
*
* <p>Depending on what has changed, the new database version will contain new instances of {@link
* PartialFileHistory}, {@link FileVersion}, {@link FileContent}, {@link ChunkEntry} and {@link
* MultiChunkEntry}.
*
* @param files List of files to be deduplicated
* @return New database version containing new/changed/deleted entities
* @throws IOException If the chunking/deduplication cannot read/process any of the files
*/
public DatabaseVersion index(List<File> files) throws IOException {
DatabaseVersion newDatabaseVersion = new DatabaseVersion();
// Load file history cache
List<PartialFileHistory> fileHistoriesWithLastVersion =
localDatabase.getFileHistoriesWithLastVersion();
// TODO [medium] This should be in FileHistoryDao
Map<FileChecksum, List<PartialFileHistory>> fileChecksumCache =
fillFileChecksumCache(fileHistoriesWithLastVersion);
Map<String, PartialFileHistory> filePathCache = fillFilePathCache(fileHistoriesWithLastVersion);
// Find and index new files
deduper.deduplicate(
files,
new IndexerDeduperListener(newDatabaseVersion, fileChecksumCache, filePathCache, listener));
// Find and remove deleted files
removeDeletedFiles(newDatabaseVersion, fileHistoriesWithLastVersion);
return newDatabaseVersion;
}
