//*************************************************/
// CONSTRUCTOR
//*************************************************/
#region Constructor
public MathChatBotHelper()
{
NLPHelper = new NLPHelper();
SimpleCalculatorHelper = new SimpleCalculatorHelper();
Messages = new ObservableCollection <MessageObject>();
GetCommands();
}
/// <summary>
/// Analyze a text message from the user
/// </summary>
/// <param name="text"></param>
/// <returns>A message result</returns>
private MessageResult AnalyzeText(string text)
{
try
{
var tempText = text.ToLower();
// Get sentences that has been written
var sentences = NLPHelper.GetSentences(tempText);
// Does not support more than one sentence
if (sentences.Count > 1)
{
return(new MessageResult(Properties.Resources.i_cannot_process_more_than_one_sentence));
}
// Tagging on the given words
List <TaggedWord> wordList = null;
// Function for tagging
Action <bool> tagging = (useSavedSentences) =>
{
// Insert a question mark at the end of a text
if (!tempText.EndsWith("?"))
{
tempText += "?";
}
// Tag the words in the text
wordList = NLPHelper.Tag(tempText, useSavedSentences);
};
PerformanceTester.StartMET("Use calculator");
// If text has any numbers use the calculator
string output;
if (SimpleCalculatorHelper.CheckInput(ref tempText, out output))
{
// If text is not math command
if (output == null)
{
var input = tempText;
tagging(false);
if (wordList.Any(x => x.IsWHWord || x.IsVerb))
{
// Skip the WH-words and verbs in the beginning when using calculator
var context = wordList
.SkipWhile(x => x.IsWHWord || x.IsVerb)
.Where(x => x.POSStringIdentifier != ".")
.ToList();
// Get text
var joined = context.ListToString();
// If sentence starts with a WH word insert an equal sign
if (wordList.FirstOrDefault().IsWHWord)
{
input = joined.Insert(0, "=");
}
}
// Use calculator
output = SimpleCalculatorHelper.UseCalculator(input);
PerformanceTester.StopMET("Use calculator");
}
// If output is not null write the calculator result to the user
if (output != null)
{
return(new MessageResult()
{
Messages = new MessageObject[] { new MessageObject(output) }
});
}
}
PerformanceTester.StopMET("Use calculator");
tagging(true);
PerformanceTester.StartMET("Analyze word list");
// Analyze the input
var analyzeResult = AnalyzeWordList(wordList);
PerformanceTester.StopMET("Analyze word list");
// If success
if (analyzeResult.IsSuccess)
{
// Analyze the search strings
return(AnalyzeSearchStrings(analyzeResult.SearchStrings));
}
// If error
else
{
return(new MessageResult(analyzeResult.ErrorMessage));
}
}
catch (Exception mes)
{
return(new MessageResult(mes.Message));
}
}
