private static string GetPathForFork(ExecuteDeviceCommandAsyncTaskData data, Fork fork, FileSystem deviceFileSystem, IEnumerable <ProgramDescription> roms, RomListConfiguration romsConfiguration, ref string destinationDir, out bool retrievalNecessary)
{
retrievalNecessary = false;
string forkPath = null;
var forkFileKind = ProgramFileKind.None;
var crc = 0u;
var cfgCrc = 0u;
var errors = data.Result as FileSystemSyncErrors;
// Determine what kind of fork this is.
ILfsFileInfo fileContainingFork = null;
var forkKind = deviceFileSystem.GetForkKind(fork, out fileContainingFork);
switch (forkKind)
{
case ForkKind.Program:
// Try to fetch LUIGI header from the fork.
forkFileKind = ProgramFileKind.LuigiFile;
forkPath = GetRomPathForForkFromRomList(data, fork, roms, romsConfiguration.RomsDirectory, out crc, out cfgCrc);
if (forkPath == null)
{
forkPath = GetRomPathForForkFromCache(fork, romsConfiguration.RomsDirectory);
}
if ((forkPath == null) && string.IsNullOrEmpty(destinationDir))
{
destinationDir = romsConfiguration.RomsDirectory;
}
break;
case ForkKind.JlpFlash:
if (string.IsNullOrEmpty(destinationDir))
{
destinationDir = romsConfiguration.RomsDirectory; // seems sensible to keep save data file(s) next to the ROM
}
forkFileKind = ProgramFileKind.SaveData;
break;
case ForkKind.Manual:
if (string.IsNullOrEmpty(destinationDir))
{
destinationDir = romsConfiguration.ManualsDirectory;
}
forkFileKind = ProgramFileKind.ManualText;
break;
case ForkKind.Vignette:
if (string.IsNullOrEmpty(destinationDir))
{
destinationDir = Configuration.Instance.VignetteDataAreaPath; // keep next to ROM?
}
forkFileKind = ProgramFileKind.Vignette;
break;
case ForkKind.Reserved4:
case ForkKind.Reserved5:
case ForkKind.Reserved6:
if (string.IsNullOrEmpty(destinationDir))
{
destinationDir = Configuration.Instance.ReservedDataAreaPath; // keep next to ROM?
}
forkFileKind = ProgramFileKind.GenericSupportFile;
errors.UnsupportedForks.Add(new Tuple <ILfsFileInfo, Fork>(fileContainingFork, fork));
////throw new UnsupportedForkKindException(forkKind);
break;
case ForkKind.None:
// An orphaned fork. Retrieve it, but we can't really do much with it.
if (string.IsNullOrEmpty(destinationDir))
{
destinationDir = Configuration.Instance.RecoveredDataAreaPath; // orphaned fork
}
forkFileKind = ProgramFileKind.None;
errors.OrphanedForks.Add(fork);
break;
default:
throw new UnsupportedForkKindException(forkKind);
}
if ((destinationDir != null) && (forkPath == null))
{
retrievalNecessary = true;
var forkFileBaseName = (fileContainingFork == null) ? Configuration.Instance.GetForkDataFileName(fork.GlobalForkNumber) : fileContainingFork.LongName.EnsureValidFileName();
var extension = forkFileKind.FileExtension();
// For the menu position fork, use the default extension; since it's in the manual fork slot, we want
// to override the .txt extension.
if (string.IsNullOrEmpty(extension) || (fork.Uid == Fork.MenuPositionForkUid))
{
extension = Configuration.ForkExtension;
}
var forkFileName = System.IO.Path.ChangeExtension(forkFileBaseName, extension);
var destFile = System.IO.Path.Combine(destinationDir, forkFileName);
if (System.IO.File.Exists(destFile))
{
var existingCrc = 0u;
var existingCfgCrc = 0u;
var luigiHeader = LuigiFileHeader.GetHeader(destFile);
if ((luigiHeader != null) && (luigiHeader.Version > 0))
{
existingCrc = luigiHeader.OriginalRomCrc32;
existingCfgCrc = luigiHeader.OriginalCfgCrc32;
}
if (existingCrc == 0)
{
existingCrc = Crc32.OfFile(destFile);
}
if (existingCfgCrc == 0)
{
var destCfgFile = System.IO.Path.ChangeExtension(destFile, ProgramFileKind.CfgFile.FileExtension());
if (System.IO.File.Exists(destCfgFile))
{
existingCfgCrc = Crc32.OfFile(destCfgFile);
}
}
// This is the equivalent of RomComparerStrict: We skip retrieval only if both the ROM CRCs match and, if available, the .cfg CRCs match.
if ((crc != 0) && (existingCrc == crc) && ((cfgCrc == 0) || (existingCfgCrc == cfgCrc)))
{
retrievalNecessary = false;
forkPath = destFile;
}
else
{
forkPath = destFile.EnsureUniqueFileName();
}
}
else
{
forkPath = destFile;
}
}
if (!string.IsNullOrEmpty(forkPath) && !System.IO.File.Exists(forkPath))
{
retrievalNecessary = true;
destinationDir = System.IO.Path.GetDirectoryName(forkPath);
}
return(forkPath);
}
private static string GetSourcePathForFork(ExecuteDeviceCommandAsyncTaskData data, Fork fork, FileSystem deviceFileSystem, IEnumerable <ProgramDescription> roms, RomListConfiguration romsConfiguration)
{
bool retrievalNecessary;
string destinationDir = null;
var forkSourcePath = GetPathForFork(data, fork, deviceFileSystem, roms, romsConfiguration, ref destinationDir, out retrievalNecessary);
if (retrievalNecessary)
{
if (!data.Device.RetrieveForkData(data, new[] { fork }, destinationDir, new[] { System.IO.Path.GetFileName(forkSourcePath) }))
{
var syncErrors = data.Result as FileSystemSyncErrors;
syncErrors.UnableToRetrieveForks.Add(fork);
forkSourcePath = null;
}
}
return(forkSourcePath);
}