public static Patch Compare(IBackupSource source, IBackupChain target)
{
Trace.WriteLine("Comparing source to destination", "Patch");
var result = new Patch(source, target);
var sourceFiles = source.EnumerateFiles ().ToArray ();
result.RemovedFiles = target.GetFiles().Where(file => sourceFiles.All(a => a.RelativePath.ToLower() != file.ToLower()));
result.AddedOrChangedFiles =
sourceFiles.Where(a => !target.GetFiles().Select(m => m.ToLower()).Contains(a.RelativePath.ToLower()) || target.GetFileSize(a.RelativePath) != a.GetFileSize() || !HashMatches(target, a)).AsParallel ().ToArray ();
return result;
}
private static bool HashMatches(IBackupChain target, IBackupSourceFile a)
{
var sourceHash = a.GetFileHash();
var targetHash = target.GetFileHash(a.RelativePath);
return sourceHash == targetHash;
}
protected Patch(IBackupSource source, IBackupChain target)
{
Source = source;
Target = target;
}
