NetworkingPeer.DeltaCompressionRead C# (CSharp) Method

    private bool DeltaCompressionRead(PhotonView view, Hashtable data)
    {
        if (data.ContainsKey((byte)1))
        {
            // we have a full list of data (cause key 1 is used), so return "we have uncompressed all"
            return true;
        }

        // Compression was applied as data[(byte)2] exists (this is the data with some fields being compressed to null)
        // now we also need a previous "full" list of values to restore values that are null in this msg
        if (view.lastOnSerializeDataReceived == null)
        {
            return false; // We dont have a full match yet, we cannot work with missing values: skip this message
        }

        object[] compressedContents = data[(byte)2] as object[];
        if (compressedContents == null)
        {
            // despite expectation, there is no compressed data in this msg. shouldn't happen. just a null check
            return false;
        }

        int[] indexesThatAreChangedToNull = data[(byte)3] as int[];
        if (indexesThatAreChangedToNull == null)
        {
            indexesThatAreChangedToNull = new int[0];
        }

        object[] lastReceivedData = view.lastOnSerializeDataReceived;
        for (int index = 0; index < compressedContents.Length; index++)
        {
            if (compressedContents[index] == null && !indexesThatAreChangedToNull.Contains(index))
            {
                // we replace null values in this received msg unless a index is in the "changed to null" list
                object lastValue = lastReceivedData[index];
                compressedContents[index] = lastValue;
            }
        }

        data[(byte)1] = compressedContents; // compressedContents are now uncompressed...
        return true;
    }