public async Task <State> GetNextUserStateAsync(UserContext userContext, State lastState, BotFlow botFlow)
{
var nextStateId = lastState.DefaultOutput.StateId;
foreach (var outputCondition in lastState.OutputConditions)
{
var matchCondition = await outputCondition.Conditions.AllAsync(async o =>
{
string toCompare = default;
switch (o.Source)
{
case ConditionSource.Input:
toCompare = (await _variableService.GetVariableValueAsync("input", userContext)).ToString();
break;
case ConditionSource.Context:
toCompare = await _variableService.ReplaceVariablesInStringAsync(o.Variable, userContext);
break;
case ConditionSource.Intent:
toCompare = (await userContext.NlpResponse)?.Intent?.IntentName;
break;
case ConditionSource.Entity:
toCompare = (await userContext.NlpResponse)?.Entities?[o.Entity];
break;
}
var comparisonType = _comparisonService.GetComparisonType(o.Comparison);
switch (comparisonType)
{
case ComparisonType.Unary:
var unaryComparer = _comparisonService.GetUnaryConditionComparator(o.Comparison);
return(unaryComparer(toCompare));
case ComparisonType.Binary:
var binaryComparer = _comparisonService.GetBinaryConditionComparator(o.Comparison);
return(o.Values.Any(v => binaryComparer(toCompare, v)));
}
return(false);
});
if (matchCondition)
{
nextStateId = outputCondition.StateId;
break;
}
}
return(botFlow.States[nextStateId] ?? botFlow.States.Single(x => x.Value.IsRoot).Value);
}