public static IEnumerable <FileDetails> GetDeletedFiles(FolderContentSnapshot newSnapshot, FolderContentSnapshot oldSnapshot)
{
var deletedFiles = new List <FileDetails>();
foreach (var file in oldSnapshot.Files)
{
var fileNameOnly = file.FileName.Substring(file.FileName.LastIndexOf('\\') + 1).ToLower();
if (excludedFiles.Contains(fileNameOnly))
{
continue;
}
if (newSnapshot.Files.All(x => x.FileName.ToLower() != file.FileName.ToLower()))
{
deletedFiles.Add(new FileDetails
{
FileName = file.FileName,
ChangeDate = file.ChangeDate,
FolderId = newSnapshot.FolderId
});
}
}
return(deletedFiles);
}
public FolderContentSnapshot ReadSnapshot(Guid folderId)
{
FolderContentSnapshot result = null;
using (var database = new LiteDatabase(DatabaseName))
{
// Open collection
var snapshots = database.GetCollection <FolderContentSnapshot>(CollectionName);
result = snapshots.Find(x => x.FolderId == folderId).SingleOrDefault();
// create empty snapshot of nothing has been found
if (result == null)
{
result = new FolderContentSnapshot()
{
FolderId = folderId,
SnapshotDate = DateTime.Now,
Files = new List <FileDetails>()
};
// add newly created snapshot to database to ensure its existance in future
snapshots.Insert(result);
}
}
return(result);
}
public void UpdateSnapshot(FolderContentSnapshot snapshot)
{
using (var database = new LiteDatabase(DatabaseName))
{
var snapshots = database.GetCollection <FolderContentSnapshot>(CollectionName);
snapshots.Update(snapshot);
}
}
public FolderContentSnapshot CreateSnapshot(FolderDetails folder)
{
var snapshot = new FolderContentSnapshot();
var existingFiles = Directory.GetFiles(folder.FolderName, "*", SearchOption.TopDirectoryOnly);
foreach (var file in existingFiles)
{
var fileInfo = new FileInfo(file);
snapshot.Files.Add(new FileDetails
{
FileName = file,
ChangeDate = fileInfo.LastWriteTime,
FolderId = folder.FolderId
});
}
snapshot.FolderId = folder.FolderId;
snapshot.SnapshotDate = DateTime.Now;
return(snapshot);
}
