DataSenderReceiver

Tsvrc.DataTransfer.DataSenderReceiver builds on DataChunkReceiver and only changes how reception is exposed. It turns the raw hooks of the receiver (OnTransferStarted, OnChunksAssembled, OnChunkStored and others) into LastData, LastChunkIndex, LastTotalChunks and four events, OnDataReceptionStartedEvent, ...StoppedEvent, ...CompletedEvent and OnDataChunkReceivedEvent, each with a matching protected virtual hook. A subclass overrides those hooks without touching the chunk arrays. It's one layer of the data transfer chain, which names the type to use.

The started and stopped events don't update a Last* property. LastChunkIndex and LastTotalChunks are set before OnDataChunkReceivedEvent fires, and LastData before OnDataReceptionCompletedEvent, so a subscriber can read them inside its handler.

Deferred stop and complete events

DataSenderReceiver emits OnDataReceptionStopped and Completed one frame late, like the transfer events of DataSender and for the same reason: they fire inside the stop or complete call, before the cleanup of the process, and a new transfer started from the event right away would lose its state to that cleanup.

The assembled data waits in the private _pendingCompletionData field instead of going straight to LastData. A new transfer that starts within that frame resets the receiver state, and this keeps it from clearing the data before the deferred event reads it. LastData is set in the same step that fires the completion event.

ResetReceiverState, which runs when a new transfer starts, clears both pending flags (_pendingCompletion and _pendingStop). A deferred call for an older transfer still fires, finds its flag cleared, and emits nothing.

Validation

This layer adds no checks. Sender verification, duplicate suppression and the chunk-count bounds are done by DataChunkReceiver.

Usage

To build your own type on this layer, override OnDataReceptionCompleted and read LastData:

protected override void OnDataReceptionCompleted()
{
    string received = LastData;
    // ...
}