/// <summary>
/// Get the Stream related to a file
/// </summary>
/// <param name="datItem">Information for the current file to rebuild from</param>
/// <param name="file">Name of the file to process</param>
/// <param name="isZip">Non-null if the input file is an archive</param>
/// <param name="stream">Output stream representing the opened file</param>
/// <returns>True if the stream opening succeeded, false otherwise</returns>
private static bool GetFileStream(DatItem datItem, string file, bool?isZip, out Stream stream)
{
// Get a generic stream for the file
stream = null;
// If we have a zipfile, extract the stream to memory
if (isZip != null)
{
BaseArchive archive = BaseArchive.Create(file);
if (archive != null)
{
(stream, _) = archive.CopyToStream(datItem.GetName() ?? datItem.ItemType.ToString());
}
}
// Otherwise, just open the filestream
else
{
stream = File.OpenRead(file);
}
// If the stream is null, then continue
if (stream == null)
{
return(false);
}
// Seek to the beginning of the stream
if (stream.CanSeek)
{
stream.Seek(0, SeekOrigin.Begin);
}
return(true);
}
/// <summary>
/// Check a given file for hashes, based on current settings
/// </summary>
/// <param name="datFile">Current DatFile object to add to</param>
/// <param name="item">Filename of the item to be checked</param>
/// <param name="basePath">Base folder to be used in creating the DAT</param>
/// <param name="asFiles">TreatAsFiles representing CHD and Archive scanning</param>
/// <param name="skipFileType">Type of files that should be skipped</param>
/// <param name="addBlanks">True if blank items should be created for empty folders, false otherwise</param>
/// <param name="hashes">Hashes to include in the information</param>
private static void CheckFileForHashes(
DatFile datFile,
string item,
string basePath,
TreatAsFile asFiles,
SkipFileType skipFileType,
bool addBlanks,
Hash hashes)
{
// If we're in depot mode, process it separately
if (CheckDepotFile(datFile, item))
{
return;
}
// Initialize possible archive variables
BaseArchive archive = BaseArchive.Create(item);
// Process archives according to flags
if (archive != null)
{
// Set the archive flags
archive.AvailableHashes = hashes;
// Skip if we're treating archives as files and skipping files
if (asFiles.HasFlag(TreatAsFile.Archive) && skipFileType == SkipFileType.File)
{
return;
}
// Skip if we're skipping archives
else if (skipFileType == SkipFileType.Archive)
{
return;
}
// Process as archive if we're not treating archives as files
else if (!asFiles.HasFlag(TreatAsFile.Archive))
{
var extracted = archive.GetChildren();
// If we have internal items to process, do so
if (extracted != null)
{
ProcessArchive(datFile, item, basePath, extracted);
}
// Now find all folders that are empty, if we are supposed to
if (addBlanks)
{
ProcessArchiveBlanks(datFile, item, basePath, archive);
}
}
// Process as file if we're treating archives as files
else
{
ProcessFile(datFile, item, basePath, hashes, asFiles);
}
}
// Process non-archives according to flags
else
{
// Skip if we're skipping files
if (skipFileType == SkipFileType.File)
{
return;
}
// Process as file
else
{
ProcessFile(datFile, item, basePath, hashes, asFiles);
}
}
}
/// <summary>
/// Attempt to add a file to the output if it matches
/// </summary>
/// <param name="datFile">Current DatFile object to rebuild from</param>
/// <param name="file">Name of the file to process</param>
/// <param name="outDir">Output directory to use to build to</param>
/// <param name="quickScan">True to enable external scanning of archives, false otherwise</param>
/// <param name="date">True if the date from the DAT should be used if available, false otherwise</param>
/// <param name="inverse">True if the DAT should be used as a filter instead of a template, false otherwise</param>
/// <param name="outputFormat">Output format that files should be written to</param>
/// <param name="asFiles">TreatAsFiles representing special format scanning</param>
/// <returns>True if the file was used to rebuild, false otherwise</returns>
private static bool RebuildGenericHelper(
DatFile datFile,
string file,
string outDir,
bool quickScan,
bool date,
bool inverse,
OutputFormat outputFormat,
TreatAsFile asFiles)
{
// If we somehow have a null filename, return
if (file == null)
{
return(false);
}
// Set the deletion variables
bool usedExternally = false, usedInternally = false;
// Create an empty list of BaseFile for archive entries
List <BaseFile> entries = null;
// Get the TGZ and TXZ status for later
GZipArchive tgz = new GZipArchive(file);
XZArchive txz = new XZArchive(file);
bool isSingleTorrent = tgz.IsTorrent() || txz.IsTorrent();
// Get the base archive first
BaseArchive archive = BaseArchive.Create(file);
// Now get all extracted items from the archive
if (archive != null)
{
archive.AvailableHashes = quickScan ? Hash.CRC : Hash.Standard;
entries = archive.GetChildren();
}
// If the entries list is null, we encountered an error or have a file and should scan externally
if (entries == null && File.Exists(file))
{
BaseFile internalFileInfo = BaseFile.GetInfo(file, asFiles: asFiles);
// Create the correct DatItem
DatItem internalDatItem;
if (internalFileInfo.Type == FileType.AaruFormat && !asFiles.HasFlag(TreatAsFile.AaruFormat))
{
internalDatItem = new Media(internalFileInfo);
}
else if (internalFileInfo.Type == FileType.CHD && !asFiles.HasFlag(TreatAsFile.CHD))
{
internalDatItem = new Disk(internalFileInfo);
}
else
{
internalDatItem = new Rom(internalFileInfo);
}
usedExternally = RebuildIndividualFile(datFile, internalDatItem, file, outDir, date, inverse, outputFormat);
}
// Otherwise, loop through the entries and try to match
else
{
foreach (BaseFile entry in entries)
{
DatItem internalDatItem = DatItem.Create(entry);
usedInternally |= RebuildIndividualFile(datFile, internalDatItem, file, outDir, date, inverse, outputFormat, !isSingleTorrent /* isZip */);
}
}
return(usedExternally || usedInternally);
}