public override async Task <Message> HandleMessage(Message msg)
{
var tmsg = msg as ITokenisable;
if (tmsg == null)
{
return(msg);
}
MessageContext context = new MessageContext(msg, this);
string dfClass = await Class.SelectStringAsync(context);
ClassIndex cindex = Bayes.GetClass(dfClass);
if (cindex == null)
{
cindex = new ClassIndex {
Name = dfClass
};
Bayes.AddClass(cindex);
}
cindex.IncDocumentCount();
foreach (string token in tmsg.Tokens)
{
cindex.IncTokenCount(token);
}
return(msg);
}
public Message Import(Message msg)
{
// Elimination of invalid messages
var record = msg as RecordMessage;
if (record is null)
{
return(null);
}
if (!record.Record.ContainsKey("Name"))
{
return(null);
}
if (!record.Record.ContainsKey("DocumentCount"))
{
return(null);
}
if (!record.Record.ContainsKey("TokensString"))
{
return(null);
}
//Okay, import it
try
{
ClassIndex newClass = new ClassIndex
{
Name = record.Record["Name"] as string,
DocumentCount = (int)record.Record["DocumentCount"],
TokensString = record.Record["TokensString"] as string
};
Bayes.AddClass(newClass);
return(newClass);
}
catch (Exception ex)
{
logger.Error(ex, $"{ex.GetType().Name} thrown when importing ClassIndex: {ex.Message}");
}
return(null);
}
public Message Export(Message msg)
{
MessageContext context = new MessageContext(msg, this);
string sfFrom = Smart.Format(From, context);
if (!String.IsNullOrWhiteSpace(sfFrom))
{
return(Bayes.GetClass(sfFrom));
}
var allClasses = from k in Bayes.ClassNames
where !String.IsNullOrWhiteSpace(k)
select Bayes.GetClass(k);
return(new Batch
{
DerivedFrom = msg,
Name = this.Name,
Messages = allClasses.ToList()
});
}