public System.IO.Stream GetContent(RootName root, FileId source)
{
if (!_contentCache.ContainsKey(source))
{
var data = _localState.GetContent(root, source);
var evt = NetworkContentLocator.FromBytes(data.ReadFully());
var content = evt.MapOrContent;
if (evt.IsMap)
{
content = _imdStore.GetImDAsync(evt.MapOrContent).GetAwaiter().GetResult();
}
_contentCache[source] = content;
}
// If you create a MemoryStream over a pre-allocated byte array,
// it can't expand (ie. get longer than the size you specified when you started).
// The key is to use the empty (no params) MemoryStream() ctor, which creates it as expandable.
var ms = new System.IO.MemoryStream();
var bytes = _contentCache[source];
ms.Write(bytes, 0, bytes.Length);
ms.Seek(0, System.IO.SeekOrigin.Begin);
return(new System.IO.BufferedStream(ms));
}
object Apply(NetworkFileItemCreated e)
{
var locator = new NetworkContentLocator
{
ContentId = e.SequenceNr,
IsMap = e.IsMap,
MapOrContent = e.MapOrContent
};
var stream = new MemoryStream(locator.GetBytes());
return(_localState.NewFileItem(_root, new DirectoryId(e.ParentDirId), e.Name, stream, null));
}
object Apply(NetworkFileContentSet e)
{
var locator = new NetworkContentLocator
{
ContentId = e.SequenceNr,
IsMap = e.IsMap,
MapOrContent = e.MapOrContent
};
var stream = new MemoryStream(locator.GetBytes());
_localState.SetContent(_root, new FileId(e.FileId), stream, null);
return(new object());
}
