/// <summary>
/// Handler for Google Home commands.
/// </summary>
/// <param name="deviceCommandExecutionEvent">The device command to handle.</param>
private async void HandleGoogleHomeCommand(DeviceCommandExecutionEvent deviceCommandExecutionEvent)
{
var device = _deviceRepository.Get(deviceCommandExecutionEvent.DeviceId);
if (device.Disabled)
{
return;
}
// Find all supported commands for the device
var deviceSupportedCommands = device.Traits
.SelectMany(x => x.Commands)
.ToDictionary(x => x.Key, x => x.Value);
// Check if device supports the requested command class
var execution = deviceCommandExecutionEvent.Execution;
if (deviceSupportedCommands.ContainsKey(execution.Command))
{
// Handle command delegation
var shortCommandName = execution.Command.Substring(execution.Command.LastIndexOf('.') + 1);
var deviceTopicName = Regex.Replace(deviceCommandExecutionEvent.DeviceId, @"\s", string.Empty);
var delegateTopic = $"{TopicRoot}/execution/{deviceTopicName}/{shortCommandName}";
var delegatePayload = execution.Params != null?JsonConvert.SerializeObject(execution.Params) : "{}";
await MqttClient.PublishAsync(new MqttApplicationMessageBuilder()
.WithTopic(delegateTopic)
.WithPayload(delegatePayload)
.WithAtLeastOnceQoS()
.Build())
.ConfigureAwait(false);
// Find the specific commands supported parameters it can handle
var deviceSupportedCommandParams = deviceSupportedCommands[execution.Command] ?? new Dictionary <string, string>();
// Handle remaining command state param negotiation
if (execution.Params != null)
{
// TODO: Remove the Where filter here eventually
// Flatten the parameters, ignore old delegate underscores
var flattenedParams = execution.Params
.Where(x => x.Key != "_")
.ToDictionary(x => x.Key, x => x.Value)
.ToFlatDictionary();
foreach (var parameter in flattenedParams)
{
// Check if device supports the requested parameter
if (deviceSupportedCommandParams.ContainsKey(parameter.Key))
{
// Handle remapping of command param to state key
var stateKey = CommandToStateKeyMapper.Map(parameter.Key);
// Find the DeviceState object that provides configuration for mapping state/command values
var deviceState = device.Traits
.Where(x => x.Commands.ContainsKey(execution.Command))
.Where(x => x.State != null)
.SelectMany(x => x.State)
.Where(x => x.Key == stateKey)
.Select(x => x.Value)
.FirstOrDefault();
// Build the MQTT message
var topic = deviceSupportedCommandParams[parameter.Key];
if (!string.IsNullOrEmpty(topic))
{
string payload = null;
if (deviceState != null)
{
payload = deviceState.MapValueToMqtt(parameter.Value);
}
else
{
payload = parameter.Value.ToString();
_log.LogWarning("Received supported command '{Command}' but cannot find matched state config, sending command value '{Payload}' without ValueMap", execution.Command, payload);
}
await MqttClient.PublishAsync(new MqttApplicationMessageBuilder()
.WithTopic(topic)
.WithPayload(payload)
.WithAtLeastOnceQoS()
.Build())
.ConfigureAwait(false);
}
}
}
}
}
}
/// <summary>
/// Handles a <see cref="Models.Request.ExecuteIntent"/>.
/// </summary>
/// <param name="intent">Intent to process.</param>
/// <returns>A <see cref="Models.Response.ExecutionResponsePayload"/>.</returns>
public Models.Response.ExecutionResponsePayload Handle(Models.Request.ExecuteIntent intent)
{
_log.LogInformation(string.Format(
"Received EXECUTE intent for commands: {0}",
string.Join(",", intent.Payload.Commands
.SelectMany(x => x.Execution)
.Select(x => x.Command))));
var executionResponsePayload = new Models.Response.ExecutionResponsePayload();
// Get all device ids from commands to split into per-device responses
var deviceIds = intent.Payload.Commands
.SelectMany(x => x.Devices.Select(y => y.Id))
.Distinct();
foreach (var deviceId in deviceIds)
{
var device = _deviceRepository.Get(deviceId);
if (device == null)
{
// Device not found
executionResponsePayload.Commands.Add(new Models.Response.Command
{
Ids = new List <string> {
deviceId
},
ErrorCode = "deviceNotFound",
Status = Models.Response.CommandStatus.Error
});
continue;
}
var commands = intent.Payload.Commands.Where(x => x.Devices.Any(y => y.Id == deviceId));
var executions = commands.SelectMany(x => x.Execution);
// Prepare device response payload
var deviceCommandResponse = new Models.Response.Command
{
Ids = new List <string> {
deviceId
},
Status = Models.Response.CommandStatus.Success
};
// Validate challenge check
foreach (var execution in executions)
{
var challengeResult = ValidateChallenges(device, execution);
if (challengeResult != null)
{
deviceCommandResponse.Status = Models.Response.CommandStatus.Error;
if (execution.Challenge != null)
{
// Challenge failed
deviceCommandResponse.ErrorCode = challengeResult;
deviceCommandResponse.ChallengeNeeded = new Models.Response.ChallengeResponse
{
Type = challengeResult
};
}
else
{
// Challenge required
deviceCommandResponse.ErrorCode = "challengeNeeded";
deviceCommandResponse.ChallengeNeeded = new Models.Response.ChallengeResponse
{
Type = challengeResult
};
}
break;
}
}
// Challenge missing or failed
if (deviceCommandResponse.Status != Models.Response.CommandStatus.Success)
{
executionResponsePayload.Commands.Add(deviceCommandResponse);
continue;
}
// Publish command and build state response
var schemas = TraitSchemaProvider.GetTraitSchemas();
foreach (var command in commands)
{
foreach (var execution in command.Execution)
{
// Convert command to an event to publish now that its passed all verifications
var commandEvent = new DeviceCommandExecutionEvent {
DeviceId = deviceId, Execution = execution
};
_messageHub.Publish(commandEvent);
// Generate state for response
var states = new Dictionary <string, object>();
var trait = device.Traits.FirstOrDefault(x => x.Commands.ContainsKey(execution.Command));
if (trait != null)
{
var traitSchema = schemas.FirstOrDefault(x => x.Trait == trait.Trait);
var commandSchema = traitSchema.CommandSchemas.FirstOrDefault(x => x.Command == execution.Command.ToEnum <CommandType>());
var googleState = trait.GetGoogleStateFlattened(_stateCache, traitSchema);
// Map incoming params to "fake" state changes to override existing state value
var replacedParams = execution.Params != null
? execution.Params.ToFlatDictionary().ToDictionary(kvp => CommandToStateKeyMapper.Map(kvp.Key), kvp => kvp.Value)
: new Dictionary <string, object>();
foreach (var state in googleState)
{
// Decide to use existing state cache value, or attempt to take from transformed execution params
var value = replacedParams.ContainsKey(state.Key)
? replacedParams[state.Key]
: state.Value;
// Only add to state response if specified in the command result schema, or fallback state schema
if (commandSchema.ResultsValidator != null)
{
if (commandSchema.ResultsValidator.FlattenedPathExists(state.Key))
{
states.Add(state.Key, value);
}
}
else if (traitSchema.StateSchema != null)
{
if (traitSchema.StateSchema.Validator.FlattenedPathExists(state.Key))
{
states.Add(state.Key, value);
}
}
}
}
// Add explicit online if not specified by state mappings
if (!states.ContainsKey("online"))
{
states.Add("online", true);
}
// Add any processed states
deviceCommandResponse.States = states.ToNestedDictionary();
}
}
executionResponsePayload.Commands.Add(deviceCommandResponse);
}
return(executionResponsePayload);
}