private async Task RealizeSetPowerState(PredictionResponse command)
{
var deviceType = await ExtractEntity(command, FirstLevelEntity.DeviceType, required : true);
var location = await ExtractEntity(command, FirstLevelEntity.Location, required : true);
var powerState = await ExtractEntity(command, FirstLevelEntity.PowerState, required : true);
var device = DbContext.Device.FirstOrDefault(x =>
x.DeviceTypeId == deviceType.LuisEntityId &&
x.LocationId == location.LuisEntityId);
if (device == null)
{
var msg = $"Not found device of type {deviceType.Name} in {location.Name}.";
SpeechProcessor.TextToSpeech(msg);
RealizeCancel();
return;
}
var stateChanged = device.PowerStateId != powerState.LuisEntityId;
device.PowerStateId = powerState.LuisEntityId;
DbContext.SaveChanges();
var messageAfterExecution = stateChanged
? $"Device {device.Name} {powerState.Name}"
: $"Device {device.Name} is already {powerState.Name}";
await SpeechProcessor.TextToSpeech(messageAfterExecution);
}
private async Task RealizeGetList(PredictionResponse command)
{
var deviceType = await ExtractEntity(command, FirstLevelEntity.DeviceType, required : false);
var location = await ExtractEntity(command, FirstLevelEntity.Location, required : false);
var powerState = await ExtractEntity(command, FirstLevelEntity.PowerState, required : false);
var filterText = "";
IQueryable <Device> query = DbContext.Device;
if (deviceType != null)
{
query = query.Where(x => x.DeviceTypeId == deviceType.LuisEntityId);
filterText += " of type " + deviceType.Name;
}
if (location != null)
{
query = query.Where(x => x.LocationId == location.LuisEntityId);
filterText += " in " + location.Name;
}
if (powerState != null)
{
query = query.Where(x => x.PowerStateId == powerState.LuisEntityId);
filterText += " with state " + powerState.Name;
}
var results = query.Select(x => x.Name).ToArray();
var msg = results.Count() > 0
? $"Devices{filterText} are: {string.Join(", ", results)}"
: $"Not found devices{filterText}";
await SpeechProcessor.TextToSpeech(msg);
}
private async Task RealizeCheckInternetSpeed(PredictionResponse command)
{
var rnd = new Random();
var speed = rnd.NextDouble() * 150 + 20;
var message = FormattableString.Invariant($"Internet speed is {speed:0.#} megabytes per second");
await SpeechProcessor.TextToSpeech(message);
}
private async Task <LuisEntity> ExtractEntity(PredictionResponse command, FirstLevelEntity firstLevelEntity, bool required)
{
LuisEntity result = null;
var currentCommand = command;
while (true)
{
if (currentCommand != command)
{
LogIfNecessary(currentCommand);
}
await CancelIfRequested(currentCommand);
var mustAskToClarify = false;
object nextLevelEntityObj = null;
if (currentCommand.Prediction.Entities.TryGetValue(firstLevelEntity.ToString(), out nextLevelEntityObj) &&
nextLevelEntityObj is JArray nextLevelEntitiesContainer &&
nextLevelEntitiesContainer.Count == 1
)
{
var nextLevelEntities = nextLevelEntitiesContainer
.Select(x => (x.FirstOrDefault() as JProperty))
.Where(x => x != null)
.Select(x => x.Name)
.Distinct()
.ToList();
if (nextLevelEntities.Count == 1)
{
var foundEntity = nextLevelEntities.First();
return(DbContext.LuisEntity.FirstOrDefault(x => x.Name == foundEntity));
}
else if (nextLevelEntities.Count > 1)
{
mustAskToClarify = true;
}
}
if (required || mustAskToClarify)
{
var question = $"Please specify {firstLevelEntity}";
SpeechProcessor.TextToSpeech(question);
var userResponse = await SpeechProcessor.SpeechToText();
var userText = await SpeechProcessor.HandleSpeachToTextResponse(userResponse);
currentCommand = await TextToCommand(userText);
}
else
{
return(null);
}
}
RealizeCancel();
return(null);
}
private async Task RealizeGetWeather(PredictionResponse command)
{
var rnd = new Random();
var weather = new[] { "cloudy", "rainy", "sunny", "windy" };
var temp = rnd.NextDouble() * 30;
var message = FormattableString.Invariant($"It is {weather[rnd.Next(weather.Length)]} outside. The temperature is {temp:0.#} Celsius degrees.");
await SpeechProcessor.TextToSpeech(message);
}
public async Task HandleCommand(PredictionResponse command)
{
double?topIntentScore = command.Prediction.Intents.Max(x => x.Value.Score);
LogIfNecessary(command);
if (!Enum.TryParse(command.Prediction.TopIntent, out Intent topIntent) || topIntent == Intent.None || topIntentScore < validIntentThreshold)
{
string textToSay = $"I dont understand command: {command.Query}";
await SpeechProcessor.TextToSpeech(textToSay);
return;
}
switch (topIntent)
{
case Intent.cancel:
await RealizeCancel();
break;
case Intent.set_power_state:
await RealizeSetPowerState(command);
break;
case Intent.get_list:
await RealizeGetList(command);
break;
case Intent.get_weather:
await RealizeGetWeather(command);
break;
case Intent.who_is_at_home:
await RealizeWhoIsAtHome(command);
break;
case Intent.check_internet_speed:
await RealizeCheckInternetSpeed(command);
break;
default:
throw new NotSupportedException($"Intent {topIntent} not supported");
}
}
public async Task HandleVoiceCommand()
{
var toTextResult = await this.SpeechProcessor.SpeechToText();
if (!toTextResult.Success)
{
await SpeechProcessor.TextToSpeech(toTextResult.Text);
return;
}
PredictionResponse command = await TextToCommand(toTextResult.Text);
await HandleCommand(command);
}
private async Task RealizeWhoIsAtHome(PredictionResponse command)
{
var rnd = new Random();
var people = new[] { "Eva", "Julia", "Sylvia", "Adam", "John", "Barry", "Olaf" };
var peopleAtHome = new List <string>();
for (int i = 0; i < people.Length; i++)
{
if (rnd.NextDouble() < 0.2)
{
break;
}
peopleAtHome.Add(people[rnd.Next(people.Length)]);
}
var message = peopleAtHome.Any()
? $"There is {peopleAtHome.Count} people at home: {string.Join(", ", peopleAtHome)}"
: "There is nobody at home";
await SpeechProcessor.TextToSpeech(message);
}
private async Task RealizeCancel()
{
await SpeechProcessor.TextToSpeech("Canceling dialog...");
throw new CancelIntentException();
}
public CommandHandler()
{
LUProcessor = new LUProcessor();
SpeechProcessor = new SpeechProcessor();
DbContext = StaticDb.CreateContext();
}