// TODO check comment, if only vs. only if
/// <summary>
/// Restore the content references if only the content types array is
/// present. The content references are removed when decoding a message. That
/// means if a message was received it cannot be used a second time as the
/// content references are not there anymore. This method restores the
/// content references based on the content types of the message.
/// </summary>
public void RestoreContentReferences()
{
IDictionary <Content, int> references = new Dictionary <Content, int>(ContentTypes.Count() * 2);
foreach (var contentType in ContentTypes)
{
// TODO what about Content.Undefined
if (contentType == Content.Empty)
{
return;
}
int index = 0;
if (contentType == Content.PublicKeySignature || contentType == Content.PublicKey)
{
int j = references[Content.PublicKeySignature];
if (j != default(int))
{
index = j;
}
else
{
j = references[Content.PublicKey];
if (j != default(int))
{
index = j;
}
}
}
if (!references.ContainsKey(contentType))
{
references.Add(contentType, index);
}
else
{
index = references[contentType];
}
ContentReferences.Enqueue(new MessageContentIndex(index, contentType));
references.Add(contentType, index + 1);
}
}