/// <summary>
/// This function returns TRUE if the backups should be used, and FALSE if they should not.
/// </summary>
/// <param name="dataFile"></param>
/// <param name="backupsDirectory"></param>
/// <returns></returns>
public Task <bool> CheckForOutdatedBackups(XivDataFile dataFile, DirectoryInfo backupsDirectory)
{
return(Task.Run(() =>
{
var backupDataFile =
new DirectoryInfo(Path.Combine(backupsDirectory.FullName, $"{dataFile.GetDataFileName()}.win32.index"));
var currentDataFile =
new DirectoryInfo(Path.Combine(_gameDirectory.FullName, $"{dataFile.GetDataFileName()}.win32.index"));
// Since the material addition directly adds to section 1 we can no longer check for outdated using that section header
// so instead compare the hashes of sections 2 and 3
byte[] currentHashSection2;
byte[] currentHashSection3;
byte[] backupHashSection2;
byte[] backupHashSection3;
try
{
currentHashSection2 = _index.GetIndexSection2Hash(currentDataFile);
currentHashSection3 = _index.GetIndexSection3Hash(currentDataFile);
}
catch
{
// Base files are f****d, use *any* backups.
return true;
}
try
{
backupHashSection2 = _index.GetIndexSection2Hash(backupDataFile);
backupHashSection3 = _index.GetIndexSection3Hash(backupDataFile);
}
catch
{
// Backups are f****d, can't use those.
return false;
}
return backupHashSection2.SequenceEqual(currentHashSection2) && backupHashSection3.SequenceEqual(currentHashSection3);
}));
}