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require(Modules.AI) | |
require(Modules.Player) | |
require(Modules.Conference) | |
let dialogflow, call, hangup, conference | |
// Globals for noise | |
let ambientPlayer = VoxEngine.createURLPlayer("https://actions.google.com/sounds/v1/ambiences/coffee_shop.ogg", { "progressivePlayback": true, "loop": true }) | |
// Inbound call processing | |
VoxEngine.addEventListener(AppEvents.CallAlerting, (e) => { | |
call = e.call | |
call.addEventListener(CallEvents.Connected, onCallConnected) | |
call.addEventListener(CallEvents.Disconnected, VoxEngine.terminate) | |
call.answer() | |
call.record({stereo: true}) | |
}) | |
function onCallConnected(e) { | |
// Start ambient background noise with a conference | |
conference = VoxEngine.createConference() | |
ambientPlayer.sendMediaTo(conference); | |
conference.sendMediaTo(call) | |
// Create Dialogflow object | |
dialogflow = AI.createDialogflow({ | |
lang: DialogflowLanguage.ENGLISH_US | |
}) | |
dialogflow.addEventListener(AI.Events.DialogflowResponse, onDialogflowResponse) | |
// Sending WELCOME event to let the agent says a welcome message | |
dialogflow.sendQuery({ event: { name: "WELCOME", language_code: "en" } }) | |
// Playback marker used for better user experience | |
dialogflow.addMarker(-300) | |
// Start sending media from Dialogflow to the call | |
dialogflow.sendMediaTo(conference) | |
dialogflow.addEventListener(AI.Events.DialogflowPlaybackFinished, (e) => { | |
ambientPlayer.sendMediaTo(conference) | |
// Dialogflow TTS playback finished. Hangup the call if hangup flag was set to true | |
if (hangup) { | |
call.hangup() | |
VoxEngine.destroyConference(conference) | |
} | |
}) | |
dialogflow.addEventListener(AI.Events.DialogflowPlaybackMarkerReached, (e) => { | |
Logger.write("DEBUG: DialogflowPlaybackMarkerReached - sending media to Dialogflow") | |
call.sendMediaTo(dialogflow) | |
}) | |
} | |
// Handle Dialogflow responses | |
function onDialogflowResponse(e) { | |
// If DialogflowResponse with queryResult received - the call stops sending media to Dialogflow | |
// in case of response with queryResult but without responseId we can continue sending media to dialogflow | |
if (e.response.queryResult !== undefined && e.response.responseId === undefined) { | |
call.sendMediaTo(dialogflow) | |
} else if (e.response.queryResult !== undefined && e.response.responseId !== undefined) { | |
// Do whatever required with e.response.queryResult or e.response.webhookStatus | |
// If we need to hangup because end of conversation has been reached | |
if (e.response.queryResult.diagnosticInfo !== undefined && | |
e.response.queryResult.diagnosticInfo.end_conversation == true) { | |
hangup = true | |
} | |
} | |
} |
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