public static ApiConnectionBroker Instance()
{
if (singleton_instance == null)
{
singleton_instance = new ApiConnectionBroker();
}
return(singleton_instance);
}
/// <summary>
/// Handles events from Lex
/// </summary>
/// <param name="lexEvent">Information about the lex event.</param>
/// <param name="context">Lambda execution variables.</param>
/// <returns>A response to the lex event</returns>
public LexResponse FunctionHandler(LexEvent lexEvent, ILambdaContext context)
{
//Time slot entered by user.
string time;
//Number of players indicated by the user.
string players;
//The text of the response message.
string textOut;
//Key-Value pairs of options, response text, and other things returned by the API.
IDictionary <string, string> attributes;
//What (if any) information to populate slots with in the next intent.
IDictionary <string, string> slots = new Dictionary <string, string>();
//The name of the next intent.
string nextIntent;
//The name of the next slot to elicit.
string slotToElicit;
//Detrimine the intent that triggered the logic.
switch (lexEvent.CurrentIntent.Name)
{
case "login":
string username;
string password;
string customerToken;
if (!lexEvent.SessionAttributes.TryGetValue("username", out username))
{
return(Close(lexEvent.SessionAttributes, "Fulfilled", new LexResponse.LexMessage {
ContentType = "PlainText", Content = "Could not get retrieve username."
}));
}
if (!lexEvent.SessionAttributes.TryGetValue("password", out password))
{
return(Close(lexEvent.SessionAttributes, "Fulfilled", new LexResponse.LexMessage {
ContentType = "PlainText", Content = "Could not get retrieve password."
}));
}
lexEvent.SessionAttributes.Remove("password");
LoginArgs loginArgs = new LoginArgs(username, password);
if (ApiConnectionBroker.Instance().ApiHandler(loginArgs).TryGetValue("customerToken", out customerToken))
{
lexEvent.SessionAttributes["customerToken"] = customerToken;
return(Close(lexEvent.SessionAttributes, "Fulfilled", new LexResponse.LexMessage {
ContentType = "PlainText", Content = "Login Successful."
}));
}
return(Close(lexEvent.SessionAttributes, "Fulfilled", new LexResponse.LexMessage {
ContentType = "PlainText", Content = "Could not retrieve customer token."
}));
//An example case.
case "ditto":
//Example slot population.
slots.Add("actor", "Bob Hoskins");
return(elicitSlot(lexEvent.SessionAttributes, "Test", slots, "time", new LexResponse.LexMessage {
ContentType = "PlainText", Content = "This is the new intent!! Enter a time..."
}));
//User wants tee times via a given zip code.
case "getTeeTimeByZip":
string zip;
nextIntent = "chooseOption";
slotToElicit = "option";
//Gather user inputs.
if (!lexEvent.CurrentIntent.Slots.TryGetValue("zip", out zip))
{
zip = "No zip...";
}
if (!lexEvent.CurrentIntent.Slots.TryGetValue("time", out time))
{
time = "No time...";
}
if (!lexEvent.CurrentIntent.Slots.TryGetValue("players", out players))
{
players = "1";
}
//Colate arguments for the API.
TeesByZipArgs teesByZip = new TeesByZipArgs(zip, "15", time, players);
//Contact API and get resultes.
attributes = ApiConnectionBroker.Instance().ApiHandler(teesByZip);
//Seperate out the output text.
textOut = attributes["output"];
attributes.Remove("output");
//add options to lexEvent Session Attribute vars that we will perserve.
attributes.ToList().ForEach(x => lexEvent.SessionAttributes[x.Key] = x.Value);
//Elicit the next intent to choose between options.
return(elicitSlot(lexEvent.SessionAttributes, nextIntent, slots, slotToElicit, new LexResponse.LexMessage {
ContentType = "PlainText", Content = textOut
}));
//User wants tee times via given city, state(optional), and country(optional).
case "getTeeTimeByCity":
string city;
string state;
string country;
nextIntent = "chooseOption";
slotToElicit = "option";
//Gather user inputs.
if (!lexEvent.CurrentIntent.Slots.TryGetValue("city", out city))
{
city = "No city...";
}
if (!lexEvent.CurrentIntent.Slots.TryGetValue("time", out time))
{
time = "No time...";
}
if (!lexEvent.CurrentIntent.Slots.TryGetValue("state", out state))
{
state = "No state...";
}
if (!lexEvent.CurrentIntent.Slots.TryGetValue("country", out country))
{
country = "No country...";
}
if (!lexEvent.CurrentIntent.Slots.TryGetValue("players", out players))
{
players = "1";
}
players = validatePlayers(players);
//Colate arguments for the API.
TeesByCityArgs teesByCity = new TeesByCityArgs(city, state, country, time, players);
//Contact API and get resultes.
attributes = ApiConnectionBroker.Instance().ApiHandler(teesByCity);
//Seperate out the output text.
textOut = attributes["output"];
attributes.Remove("output");
//add options to lexEvent Session Attribute vars that we will perserve.
attributes.ToList().ForEach(x => lexEvent.SessionAttributes[x.Key] = x.Value);
return(elicitSlot(lexEvent.SessionAttributes, nextIntent, slots, slotToElicit, new LexResponse.LexMessage {
ContentType = "PlainText", Content = textOut
}));
//The user has been presented with options and has chosen one.
case "chooseOption":
//the index of the option chosen.
string option;
//Ensure an option was chosen.
if (lexEvent.CurrentIntent.Slots.TryGetValue("option", out option))
{
//Ensure the option selected exists.
if (lexEvent.SessionAttributes["rateOption" + option] != "")
{
TeeTimeRateSelection selection = JsonConvert.DeserializeObject <TeeTimeRateSelection>(lexEvent.SessionAttributes["rateOption" + option]);
RateInvoiceArgs args = new RateInvoiceArgs(selection.FacilityID, selection.RateID, lexEvent.SessionAttributes["players"]);
attributes = ApiConnectionBroker.Instance().ApiHandler(args);
//Seperate out the output text.
textOut = attributes["output"];
attributes.Remove("output");
//textOut = "Rate found: " + selection.RateID + " at facility: " + selection.FacilityID;
}
else
{
textOut = "Rate not found.";
}
}
else
{
textOut = "Rate number not found.";
}
return(Close(lexEvent.SessionAttributes, "Fulfilled", new LexResponse.LexMessage {
ContentType = "PlainText", Content = textOut
}));
//The triggering event is unknown to this logic.
default:
return(Close(lexEvent.SessionAttributes, "Fulfilled", new LexResponse.LexMessage {
ContentType = "PlainText", Content = "Chat Error: State Invalid."
}));
}
}