{"version":3,"sources":["../src/lib/useMicrophone.ts","../src/lib/generateEmptyFft.ts","../src/lib/useSoundPlayer.ts","../src/lib/convertFrequencyScale.ts","../src/lib/useVoiceClient.ts","../src/lib/VoiceProvider.tsx","../src/lib/noop.ts","../src/lib/useCallDuration.ts","../src/lib/useEncoding.ts","../src/lib/useMessages.ts","../src/utils/index.ts","../src/lib/useToolStatus.ts","../src/lib/errors.ts","../src/lib/messages.ts","../src/lib/audio-message.ts","../src/models/audio.ts","../src/models/llm.ts","../src/models/messages.ts","../src/models/ttsService.ts"],"sourcesContent":["// cspell:ignore dataavailable\r\nimport type { MimeType } from 'hume';\r\nimport { getBrowserSupportedMimeType } from 'hume';\r\nimport Meyda from 'meyda';\r\nimport type { MeydaFeaturesObject } from 'meyda';\r\nimport { useCallback, useEffect, useRef, useState } from 'react';\r\nimport type { MutableRefObject } from 'react';\r\n\r\nimport { generateEmptyFft } from './generateEmptyFft';\r\n\r\nexport type MicrophoneProps = {\r\n streamRef: MutableRefObject;\r\n onAudioCaptured: (b: ArrayBuffer) => void;\r\n onStartRecording?: () => void;\r\n onStopRecording?: () => void;\r\n onError: (message: string) => void;\r\n withMicrophone: boolean;\r\n};\r\n\r\nexport const useMicrophone = (props: MicrophoneProps) => {\r\n const { streamRef, onAudioCaptured, onError, withMicrophone } = props;\r\n const [isMuted, setIsMuted] = useState(false);\r\n const isMutedRef = useRef(isMuted);\r\n const [fft, setFft] = useState(generateEmptyFft());\r\n const currentAnalyzer = useRef(null);\r\n const mimeTypeRef = useRef(null);\r\n const audioContext = useRef(null);\r\n const recorder = useRef(null);\r\n const sendAudio = useRef(onAudioCaptured);\r\n sendAudio.current = onAudioCaptured;\r\n\r\n const dataHandler = useCallback(\r\n (event: BlobEvent) => {\r\n if (!withMicrophone) return;\r\n\r\n const blob = event.data;\r\n blob\r\n .arrayBuffer()\r\n .then((buffer) => {\r\n if (buffer.byteLength > 0) {\r\n sendAudio.current?.(buffer);\r\n }\r\n })\r\n .catch((err) => {\r\n console.log(err);\r\n });\r\n },\r\n [withMicrophone],\r\n );\r\n\r\n const start = useCallback(() => {\r\n if (!withMicrophone) return;\r\n\r\n const stream = streamRef.current;\r\n if (!stream) {\r\n throw new Error('No stream connected');\r\n }\r\n\r\n const context = new AudioContext();\r\n audioContext.current = context;\r\n const input = context.createMediaStreamSource(stream);\r\n\r\n try {\r\n currentAnalyzer.current = Meyda.createMeydaAnalyzer({\r\n audioContext: context,\r\n source: input,\r\n featureExtractors: ['loudness'],\r\n callback: (features: MeydaFeaturesObject) => {\r\n const newFft = features.loudness.specific || [];\r\n setFft(() => Array.from(newFft));\r\n },\r\n });\r\n\r\n currentAnalyzer.current.start();\r\n } catch (e: unknown) {\r\n const message = e instanceof Error ? e.message : 'Unknown error';\r\n console.error(`Failed to start mic analyzer: ${message}`);\r\n }\r\n\r\n const mimeType = mimeTypeRef.current;\r\n if (!mimeType) {\r\n throw new Error('No MimeType specified');\r\n }\r\n\r\n recorder.current = new MediaRecorder(stream, {\r\n mimeType,\r\n });\r\n recorder.current.addEventListener('dataavailable', dataHandler);\r\n recorder.current.start(100);\r\n }, [dataHandler, streamRef, withMicrophone]);\r\n\r\n const stop = useCallback(() => {\r\n if (!withMicrophone) return;\r\n\r\n try {\r\n if (currentAnalyzer.current) {\r\n currentAnalyzer.current.stop();\r\n currentAnalyzer.current = null;\r\n }\r\n\r\n if (audioContext.current) {\r\n void audioContext.current\r\n .close()\r\n .then(() => {\r\n audioContext.current = null;\r\n })\r\n .catch(() => {\r\n return null;\r\n });\r\n }\r\n\r\n recorder.current?.stop();\r\n recorder.current?.removeEventListener('dataavailable', dataHandler);\r\n recorder.current = null;\r\n streamRef.current?.getTracks().forEach((track) => track.stop());\r\n\r\n setIsMuted(false);\r\n } catch (e) {\r\n const message = e instanceof Error ? e.message : 'Unknown error';\r\n onError(`Error stopping microphone: ${message}`);\r\n console.log(e);\r\n }\r\n }, [dataHandler, onError, streamRef, withMicrophone]);\r\n\r\n const mute = useCallback(() => {\r\n if (!withMicrophone) return;\r\n\r\n if (currentAnalyzer.current) {\r\n currentAnalyzer.current.stop();\r\n setFft(generateEmptyFft());\r\n }\r\n\r\n streamRef.current?.getTracks().forEach((track) => {\r\n track.enabled = false;\r\n });\r\n\r\n isMutedRef.current = true;\r\n setIsMuted(true);\r\n }, [streamRef, withMicrophone]);\r\n\r\n const unmute = useCallback(() => {\r\n if (!withMicrophone) return;\r\n\r\n if (currentAnalyzer.current) {\r\n currentAnalyzer.current.start();\r\n }\r\n\r\n streamRef.current?.getTracks().forEach((track) => {\r\n track.enabled = true;\r\n });\r\n\r\n isMutedRef.current = false;\r\n setIsMuted(false);\r\n }, [streamRef, withMicrophone]);\r\n\r\n useEffect(() => {\r\n if (!withMicrophone) return;\r\n\r\n const mimeTypeResult = getBrowserSupportedMimeType();\r\n if (mimeTypeResult.success) {\r\n mimeTypeRef.current = mimeTypeResult.mimeType;\r\n } else {\r\n onError(mimeTypeResult.error.message);\r\n }\r\n }, [onError, withMicrophone]);\r\n\r\n useEffect(() => {\r\n if (!withMicrophone) return;\r\n\r\n return () => {\r\n try {\r\n recorder.current?.stop();\r\n recorder.current?.removeEventListener('dataavailable', dataHandler);\r\n\r\n if (currentAnalyzer.current) {\r\n currentAnalyzer.current.stop();\r\n currentAnalyzer.current = null;\r\n }\r\n\r\n streamRef.current?.getTracks().forEach((track) => track.stop());\r\n streamRef.current = null;\r\n } catch (e) {\r\n console.log(e);\r\n void true;\r\n }\r\n };\r\n }, [dataHandler, streamRef, withMicrophone]);\r\n\r\n return {\r\n start,\r\n stop,\r\n mute,\r\n unmute,\r\n isMuted,\r\n fft,\r\n };\r\n};\r\n","export function generateEmptyFft(): number[] {\r\n return Array.from({ length: 24 }).map(() => 0);\r\n}\r\n","import { convertBase64ToBlob } from 'hume';\r\nimport { useCallback, useRef, useState } from 'react';\r\n\r\nimport { convertLinearFrequenciesToBark } from './convertFrequencyScale';\r\nimport { generateEmptyFft } from './generateEmptyFft';\r\nimport type { AudioOutputMessage } from '../models/messages';\r\n\r\nexport const useSoundPlayer = (props: {\r\n onError: (message: string) => void;\r\n onPlayAudio: (id: string) => void;\r\n onStopAudio: (id: string) => void;\r\n}) => {\r\n const [isPlaying, setIsPlaying] = useState(false);\r\n const [isAudioMuted, setIsAudioMuted] = useState(false);\r\n const [fft, setFft] = useState(generateEmptyFft());\r\n\r\n const audioContext = useRef(null);\r\n const analyserNode = useRef(null);\r\n const gainNode = useRef(null);\r\n const isInitialized = useRef(false);\r\n\r\n const clipQueue = useRef<\r\n Array<{\r\n id: string;\r\n buffer: AudioBuffer;\r\n }>\r\n >([]);\r\n const [queueLength, setQueueLength] = useState(0);\r\n\r\n const isProcessing = useRef(false);\r\n const currentlyPlayingAudioBuffer = useRef(\r\n null,\r\n );\r\n const frequencyDataIntervalId = useRef(null);\r\n\r\n const onPlayAudio = useRef(props.onPlayAudio);\r\n onPlayAudio.current = props.onPlayAudio;\r\n\r\n const onStopAudio = useRef(props.onStopAudio);\r\n onStopAudio.current = props.onStopAudio;\r\n\r\n const onError = useRef(props.onError);\r\n onError.current = props.onError;\r\n\r\n const playNextClip = useCallback(() => {\r\n if (analyserNode.current === null || audioContext.current === null) {\r\n onError.current('Audio environment is not initialized');\r\n return;\r\n }\r\n\r\n if (clipQueue.current.length === 0 || isProcessing.current) {\r\n setQueueLength(0);\r\n return;\r\n }\r\n\r\n const nextClip = clipQueue.current.shift();\r\n setQueueLength(clipQueue.current.length);\r\n\r\n if (!nextClip) return;\r\n\r\n isProcessing.current = true;\r\n setIsPlaying(true);\r\n\r\n // Use AudioBufferSourceNode for audio playback.\r\n // Safari suffered a truncation issue using HTML5 audio playback\r\n const bufferSource = audioContext.current.createBufferSource();\r\n\r\n bufferSource.buffer = nextClip.buffer;\r\n\r\n bufferSource.connect(analyserNode.current);\r\n\r\n currentlyPlayingAudioBuffer.current = bufferSource;\r\n\r\n const updateFrequencyData = () => {\r\n try {\r\n const bufferSampleRate = bufferSource.buffer?.sampleRate;\r\n\r\n if (!analyserNode.current || typeof bufferSampleRate === 'undefined')\r\n return;\r\n\r\n const dataArray = new Uint8Array(\r\n analyserNode.current.frequencyBinCount,\r\n ); // frequencyBinCount is 1/2 of fftSize\r\n analyserNode.current.getByteFrequencyData(dataArray); // Using getByteFrequencyData for performance\r\n\r\n const barkFrequencies = convertLinearFrequenciesToBark(\r\n dataArray,\r\n bufferSampleRate,\r\n );\r\n setFft(() => barkFrequencies);\r\n } catch (e) {\r\n setFft(generateEmptyFft());\r\n }\r\n };\r\n\r\n frequencyDataIntervalId.current = window.setInterval(\r\n updateFrequencyData,\r\n 5,\r\n );\r\n\r\n bufferSource.start(0);\r\n onPlayAudio.current(nextClip.id);\r\n\r\n bufferSource.onended = () => {\r\n if (frequencyDataIntervalId.current) {\r\n clearInterval(frequencyDataIntervalId.current);\r\n }\r\n setFft(generateEmptyFft());\r\n bufferSource.disconnect();\r\n isProcessing.current = false;\r\n setIsPlaying(false);\r\n onStopAudio.current(nextClip.id);\r\n currentlyPlayingAudioBuffer.current = null;\r\n playNextClip();\r\n };\r\n }, []);\r\n\r\n const initPlayer = useCallback(() => {\r\n const initAudioContext = new AudioContext();\r\n audioContext.current = initAudioContext;\r\n\r\n // Use AnalyserNode to get fft frequency data for visualizations\r\n const analyser = initAudioContext.createAnalyser();\r\n // Use GainNode to adjust volume\r\n const gain = initAudioContext.createGain();\r\n\r\n analyser.fftSize = 2048; // Must be a power of 2\r\n analyser.connect(gain);\r\n gain.connect(initAudioContext.destination);\r\n\r\n analyserNode.current = analyser;\r\n gainNode.current = gain;\r\n\r\n isInitialized.current = true;\r\n }, []);\r\n\r\n const addToQueue = useCallback(\r\n async (message: AudioOutputMessage) => {\r\n if (!isInitialized.current || !audioContext.current) {\r\n onError.current('Audio player has not been initialized');\r\n return;\r\n }\r\n\r\n try {\r\n const blob = convertBase64ToBlob(message.data, 'audio/mp3');\r\n const arrayBuffer = await blob.arrayBuffer();\r\n const audioBuffer =\r\n await audioContext.current.decodeAudioData(arrayBuffer);\r\n\r\n clipQueue.current.push({\r\n id: message.id,\r\n buffer: audioBuffer,\r\n });\r\n setQueueLength(clipQueue.current.length);\r\n\r\n // playNextClip will iterate the clipQueue upon finishing the playback of the current audio clip, so we can\r\n // just call playNextClip here if it's the only one in the queue\r\n if (clipQueue.current.length === 1) {\r\n playNextClip();\r\n }\r\n } catch (e) {\r\n const eMessage = e instanceof Error ? e.message : 'Unknown error';\r\n onError.current(`Failed to add clip to queue: ${eMessage}`);\r\n }\r\n },\r\n [playNextClip],\r\n );\r\n\r\n const stopAll = useCallback(() => {\r\n isInitialized.current = false;\r\n isProcessing.current = false;\r\n setIsPlaying(false);\r\n setIsAudioMuted(false);\r\n\r\n if (frequencyDataIntervalId.current) {\r\n window.clearInterval(frequencyDataIntervalId.current);\r\n }\r\n\r\n if (currentlyPlayingAudioBuffer.current) {\r\n currentlyPlayingAudioBuffer.current.disconnect();\r\n currentlyPlayingAudioBuffer.current = null;\r\n }\r\n\r\n if (analyserNode.current) {\r\n analyserNode.current.disconnect();\r\n analyserNode.current = null;\r\n }\r\n\r\n if (audioContext.current) {\r\n void audioContext.current\r\n .close()\r\n .then(() => {\r\n audioContext.current = null;\r\n })\r\n .catch(() => {\r\n // .close() rejects if the audio context is already closed.\r\n // Therefore, we just need to catch the error, but we don't need to\r\n // do anything with it.\r\n return null;\r\n });\r\n }\r\n\r\n clipQueue.current = [];\r\n setQueueLength(0);\r\n setFft(generateEmptyFft());\r\n }, []);\r\n\r\n const clearQueue = useCallback(() => {\r\n if (currentlyPlayingAudioBuffer.current) {\r\n currentlyPlayingAudioBuffer.current.stop();\r\n currentlyPlayingAudioBuffer.current = null;\r\n }\r\n\r\n clipQueue.current = [];\r\n setQueueLength(0);\r\n isProcessing.current = false;\r\n setIsPlaying(false);\r\n setFft(generateEmptyFft());\r\n }, []);\r\n\r\n const muteAudio = useCallback(() => {\r\n if (gainNode.current && audioContext.current) {\r\n gainNode.current.gain.setValueAtTime(0, audioContext.current.currentTime);\r\n setIsAudioMuted(true);\r\n }\r\n }, []);\r\n\r\n const unmuteAudio = useCallback(() => {\r\n if (gainNode.current && audioContext.current) {\r\n gainNode.current.gain.setValueAtTime(1, audioContext.current.currentTime);\r\n setIsAudioMuted(false);\r\n }\r\n }, []);\r\n\r\n return {\r\n addToQueue,\r\n fft,\r\n initPlayer,\r\n isPlaying,\r\n isAudioMuted,\r\n muteAudio,\r\n unmuteAudio,\r\n stopAll,\r\n clearQueue,\r\n queueLength,\r\n };\r\n};\r\n","// This function converts linear-scaled frequency decibels from an AnalyserNode's frequncy data to Bark scale [https://en.wikipedia.org/wiki/Bark_scale]\r\n// This implementation uses a simple approach of mapping indices in the linear-scaled array to the closest\r\n// Bark scale center frequency and is not intended to be an accurate representation, but rather \"close-enough\" for visualization purposes\r\nconst barkCenterFrequencies = [\r\n 50, 150, 250, 350, 450, 570, 700, 840, 1000, 1170, 1370, 1600, 1850, 2150,\r\n 2500, 2900, 3400, 4000, 4800, 5800, 7000, 8500, 10500, 13500,\r\n]; // Center frequency value in Hz\r\n\r\n// Min/max values from https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/getByteFrequencyData\r\nconst minValue = 0;\r\nconst maxValue = 255;\r\n\r\nexport function convertLinearFrequenciesToBark(\r\n linearData: Uint8Array,\r\n sampleRate: number,\r\n): number[] {\r\n const maxFrequency = sampleRate / 2;\r\n const frequencyResolution = maxFrequency / linearData.length;\r\n\r\n const barkFrequencies = barkCenterFrequencies.map((barkFreq) => {\r\n const linearDataIndex = Math.round(barkFreq / frequencyResolution);\r\n if (linearDataIndex >= 0 && linearDataIndex < linearData.length) {\r\n return (\r\n (((linearData[linearDataIndex] ?? 0) - minValue) /\r\n (maxValue - minValue)) *\r\n 2\r\n );\r\n } else {\r\n return 0;\r\n }\r\n });\r\n\r\n return barkFrequencies;\r\n}\r\n","import { Hume, HumeClient } from 'hume';\r\nimport { useCallback, useRef, useState } from 'react';\r\nimport { type Simplify } from 'type-fest';\r\n\r\nimport { type AuthStrategy } from './auth';\r\nimport type {\r\n AudioOutputMessage,\r\n JSONMessage,\r\n ToolCall,\r\n} from '../models/messages';\r\n\r\nconst isNever = (_n: never) => {\r\n return;\r\n};\r\n\r\nexport type SocketConfig = {\r\n auth: AuthStrategy;\r\n hostname?: string;\r\n} & Hume.empathicVoice.chat.Chat.ConnectArgs;\r\n\r\nexport enum VoiceReadyState {\r\n IDLE = 'idle',\r\n CONNECTING = 'connecting',\r\n OPEN = 'open',\r\n CLOSED = 'closed',\r\n}\r\n\r\nexport type ToolCallHandler = (\r\n // message will always be a tool call message where toolType === 'function'\r\n message: Simplify<\r\n ToolCall & {\r\n // caveat: this doesn't actually do what it appears to, since ToolType is\r\n // exported as both an interface and a value, this ends up being a constant\r\n // that doesn't share an type identity with the actual ToolType enum\r\n toolType: typeof Hume.empathicVoice.ToolType.Function;\r\n }\r\n >,\r\n send: {\r\n success: (content: unknown) => Hume.empathicVoice.ToolResponseMessage;\r\n error: (e: {\r\n error: string;\r\n code: string;\r\n level: string;\r\n content: string;\r\n }) => Hume.empathicVoice.ToolErrorMessage;\r\n },\r\n) => Promise<\r\n Hume.empathicVoice.ToolResponseMessage | Hume.empathicVoice.ToolErrorMessage\r\n>;\r\n\r\nexport const useVoiceClient = (props: {\r\n onAudioMessage?: (message: AudioOutputMessage) => void;\r\n onMessage?: (message: JSONMessage) => void;\r\n onToolCall?: ToolCallHandler;\r\n onError?: (message: string, error?: Error) => void;\r\n onOpen?: () => void;\r\n onClose?: Hume.empathicVoice.chat.ChatSocket.EventHandlers['close'];\r\n}) => {\r\n const client = useRef(null);\r\n\r\n const [readyState, setReadyState] = useState(\r\n VoiceReadyState.IDLE,\r\n );\r\n\r\n // this pattern might look hacky but it allows us to use the latest props\r\n // in callbacks set up inside useEffect without re-rendering the useEffect\r\n const onAudioMessage = useRef(\r\n props.onAudioMessage,\r\n );\r\n onAudioMessage.current = props.onAudioMessage;\r\n\r\n const onMessage = useRef(props.onMessage);\r\n onMessage.current = props.onMessage;\r\n\r\n const onToolCall = useRef(props.onToolCall);\r\n onToolCall.current = props.onToolCall;\r\n\r\n const onError = useRef(props.onError);\r\n onError.current = props.onError;\r\n\r\n const onOpen = useRef(props.onOpen);\r\n onOpen.current = props.onOpen;\r\n\r\n const onClose = useRef(props.onClose);\r\n onClose.current = props.onClose;\r\n\r\n const connect = useCallback((config: SocketConfig) => {\r\n return new Promise((resolve, reject) => {\r\n const hume = new HumeClient(\r\n config.auth.type === 'apiKey'\r\n ? {\r\n apiKey: config.auth.value,\r\n environment: config.hostname,\r\n }\r\n : {\r\n accessToken: config.auth.value,\r\n environment: config.hostname,\r\n },\r\n );\r\n\r\n client.current = hume.empathicVoice.chat.connect(config);\r\n\r\n client.current.on('open', () => {\r\n onOpen.current?.();\r\n setReadyState(VoiceReadyState.OPEN);\r\n resolve(VoiceReadyState.OPEN);\r\n });\r\n\r\n client.current.on('message', (message) => {\r\n if (message.type === 'audio_output') {\r\n const messageWithReceivedAt = { ...message, receivedAt: new Date() };\r\n onAudioMessage.current?.(messageWithReceivedAt);\r\n return;\r\n }\r\n\r\n if (\r\n message.type === 'assistant_message' ||\r\n message.type === 'user_message' ||\r\n message.type === 'user_interruption' ||\r\n message.type === 'error' ||\r\n message.type === 'tool_response' ||\r\n message.type === 'tool_error' ||\r\n message.type === 'chat_metadata' ||\r\n message.type === 'assistant_end'\r\n ) {\r\n const messageWithReceivedAt = { ...message, receivedAt: new Date() };\r\n onMessage.current?.(messageWithReceivedAt);\r\n return;\r\n }\r\n\r\n if (message.type === 'tool_call') {\r\n const messageWithReceivedAt = { ...message, receivedAt: new Date() };\r\n onMessage.current?.(messageWithReceivedAt);\r\n\r\n // only pass tool call messages for user defined tools\r\n if (message.toolType === Hume.empathicVoice.ToolType.Function) {\r\n void onToolCall\r\n .current?.(\r\n {\r\n ...messageWithReceivedAt,\r\n // we have to do this because even though we are using the correct\r\n // enum on line 30 for the type definition\r\n // fern exports an interface and a value using the same `ToolType`\r\n // identifier so the type comparisons will always fail\r\n toolType: 'function',\r\n },\r\n {\r\n success: (content: unknown) => ({\r\n type: 'tool_response',\r\n toolCallId: messageWithReceivedAt.toolCallId,\r\n content: JSON.stringify(content),\r\n }),\r\n error: ({\r\n error,\r\n code,\r\n level,\r\n content,\r\n }: {\r\n error: string;\r\n code: string;\r\n level: string;\r\n content: string;\r\n }) => ({\r\n type: 'tool_error',\r\n toolCallId: messageWithReceivedAt.toolCallId,\r\n error,\r\n code,\r\n level: level !== null ? 'warn' : undefined, // level can only be warn\r\n content,\r\n }),\r\n },\r\n )\r\n .then((response) => {\r\n // if valid send it to the socket\r\n // otherwise, report error\r\n if (response.type === 'tool_response') {\r\n client.current?.sendToolResponseMessage(response);\r\n } else if (response.type === 'tool_error') {\r\n client.current?.sendToolErrorMessage(response);\r\n } else {\r\n onError.current?.('Invalid response from tool call');\r\n }\r\n });\r\n }\r\n return;\r\n }\r\n\r\n // asserts that all message types are handled\r\n isNever(message);\r\n return;\r\n });\r\n\r\n client.current.on('close', (event) => {\r\n onClose.current?.(event);\r\n setReadyState(VoiceReadyState.CLOSED);\r\n });\r\n\r\n client.current.on('error', (e) => {\r\n const message = e instanceof Error ? e.message : 'Unknown error';\r\n onError.current?.(message, e instanceof Error ? e : undefined);\r\n reject(e);\r\n });\r\n\r\n setReadyState(VoiceReadyState.CONNECTING);\r\n });\r\n }, []);\r\n\r\n const disconnect = useCallback(() => {\r\n setReadyState(VoiceReadyState.IDLE);\r\n client.current?.close();\r\n }, []);\r\n\r\n const sendSessionSettings = useCallback(\r\n (sessionSettings: Hume.empathicVoice.SessionSettings) => {\r\n if (readyState !== VoiceReadyState.OPEN) {\r\n throw new Error('Socket is not open');\r\n }\r\n client.current?.sendSessionSettings(sessionSettings);\r\n },\r\n [readyState],\r\n );\r\n\r\n const sendAudio = useCallback(\r\n (arrayBuffer: ArrayBufferLike) => {\r\n if (readyState !== VoiceReadyState.OPEN) {\r\n throw new Error('Socket is not open');\r\n }\r\n client.current?.socket?.send(arrayBuffer);\r\n },\r\n [readyState],\r\n );\r\n\r\n const sendUserInput = useCallback(\r\n (text: string) => {\r\n if (readyState !== VoiceReadyState.OPEN) {\r\n throw new Error('Socket is not open');\r\n }\r\n client.current?.sendUserInput(text);\r\n },\r\n [readyState],\r\n );\r\n\r\n const sendAssistantInput = useCallback(\r\n (text: string) => {\r\n if (readyState !== VoiceReadyState.OPEN) {\r\n throw new Error('Socket is not open');\r\n }\r\n client.current?.sendAssistantInput({\r\n text,\r\n });\r\n },\r\n [readyState],\r\n );\r\n\r\n const sendToolMessage = useCallback(\r\n (\r\n // type definitions for toolMessage come from the Hume SDK because messages that are sent from the client\r\n // to the backend do not have the extended `receivedAt` field\r\n toolMessage:\r\n | Hume.empathicVoice.ToolResponseMessage\r\n | Hume.empathicVoice.ToolErrorMessage,\r\n ) => {\r\n if (readyState !== VoiceReadyState.OPEN) {\r\n throw new Error('Socket is not open');\r\n }\r\n if (toolMessage.type === 'tool_error') {\r\n client.current?.sendToolErrorMessage(toolMessage);\r\n } else {\r\n client.current?.sendToolResponseMessage(toolMessage);\r\n }\r\n },\r\n [readyState],\r\n );\r\n\r\n const sendPauseAssistantMessage = useCallback(() => {\r\n if (readyState !== VoiceReadyState.OPEN) {\r\n throw new Error('Socket is not open');\r\n }\r\n client.current?.pauseAssistant({});\r\n }, [readyState]);\r\n const sendResumeAssistantMessage = useCallback(() => {\r\n if (readyState !== VoiceReadyState.OPEN) {\r\n throw new Error('Socket is not open');\r\n }\r\n client.current?.resumeAssistant({});\r\n }, [readyState]);\r\n\r\n return {\r\n readyState,\r\n sendSessionSettings,\r\n sendAudio,\r\n connect,\r\n disconnect,\r\n sendUserInput,\r\n sendAssistantInput,\r\n sendToolMessage,\r\n sendPauseAssistantMessage,\r\n sendResumeAssistantMessage,\r\n };\r\n};\r\n","import { type Hume } from 'hume';\r\nimport React, {\r\n createContext,\r\n FC,\r\n PropsWithChildren,\r\n useCallback,\r\n useContext,\r\n useEffect,\r\n useMemo,\r\n useRef,\r\n useState,\r\n} from 'react';\r\n\r\nimport { ConnectionMessage } from './connection-message';\r\nimport { noop } from './noop';\r\nimport { useCallDuration } from './useCallDuration';\r\nimport { useEncoding } from './useEncoding';\r\nimport { useMessages } from './useMessages';\r\nimport { useMicrophone } from './useMicrophone';\r\nimport { useSoundPlayer } from './useSoundPlayer';\r\nimport { useToolStatus } from './useToolStatus';\r\nimport {\r\n SocketConfig,\r\n ToolCallHandler,\r\n useVoiceClient,\r\n VoiceReadyState,\r\n} from './useVoiceClient';\r\nimport {\r\n AssistantTranscriptMessage,\r\n AudioOutputMessage,\r\n ChatMetadataMessage,\r\n JSONMessage,\r\n UserInterruptionMessage,\r\n UserTranscriptMessage,\r\n} from '../models/messages';\r\n\r\ntype VoiceError =\r\n | { type: 'socket_error'; message: string; error?: Error }\r\n | { type: 'audio_error'; message: string; error?: Error }\r\n | { type: 'mic_error'; message: string; error?: Error };\r\n\r\ntype VoiceStatus =\r\n | {\r\n value: 'disconnected' | 'connecting' | 'connected';\r\n reason?: never;\r\n }\r\n | {\r\n value: 'error';\r\n reason: string;\r\n };\r\n\r\nexport type VoiceContextType = {\r\n connect: () => Promise;\r\n disconnect: () => void;\r\n fft: number[];\r\n isMuted: boolean;\r\n isAudioMuted: boolean;\r\n isPlaying: boolean;\r\n messages: (JSONMessage | ConnectionMessage)[];\r\n lastVoiceMessage: AssistantTranscriptMessage | null;\r\n lastUserMessage: UserTranscriptMessage | null;\r\n clearMessages: () => void;\r\n mute: () => void;\r\n unmute: () => void;\r\n muteAudio: () => void;\r\n unmuteAudio: () => void;\r\n readyState: VoiceReadyState;\r\n sendUserInput: (text: string) => void;\r\n sendAssistantInput: (text: string) => void;\r\n sendSessionSettings: Hume.empathicVoice.chat.ChatSocket['sendSessionSettings'];\r\n sendToolMessage: (\r\n type:\r\n | Hume.empathicVoice.ToolResponseMessage\r\n | Hume.empathicVoice.ToolErrorMessage,\r\n ) => void;\r\n pauseAssistant: () => void;\r\n resumeAssistant: () => void;\r\n status: VoiceStatus;\r\n micFft: number[];\r\n error: VoiceError | null;\r\n isAudioError: boolean;\r\n isError: boolean;\r\n isMicrophoneError: boolean;\r\n isSocketError: boolean;\r\n callDurationTimestamp: string | null;\r\n toolStatusStore: ReturnType['store'];\r\n chatMetadata: ChatMetadataMessage | null;\r\n playerQueueLength: number;\r\n isPaused: boolean;\r\n};\r\n\r\nconst VoiceContext = createContext(null);\r\n\r\nexport type VoiceProviderProps = PropsWithChildren & {\r\n sessionSettings?: Hume.empathicVoice.SessionSettings;\r\n onMessage?: (message: JSONMessage) => void;\r\n onError?: (err: VoiceError) => void;\r\n onOpen?: () => void;\r\n onClose?: Hume.empathicVoice.chat.ChatSocket.EventHandlers['close'];\r\n onToolCall?: ToolCallHandler;\r\n onAudioStart?: (clipId: string) => void;\r\n onAudioEnd?: (clipId: string) => void;\r\n onInterruption?: (\r\n message: UserTranscriptMessage | UserInterruptionMessage,\r\n ) => void;\r\n /**\r\n * @default true\r\n * @description Clear messages when the voice is disconnected.\r\n */\r\n clearMessagesOnDisconnect?: boolean;\r\n /**\r\n * @default 100\r\n * @description The maximum number of messages to keep in memory.\r\n */\r\n messageHistoryLimit?: number;\r\n /**\r\n * @default true\r\n * @description Whether to use microphone input for the voice call\r\n */\r\n withMicrophone?: boolean;\r\n};\r\n\r\nexport const useVoice = () => {\r\n const ctx = useContext(VoiceContext);\r\n if (!ctx) {\r\n throw new Error('useVoice must be used within an VoiceProvider');\r\n }\r\n return ctx;\r\n};\r\n\r\nexport const VoiceProvider: FC = ({\r\n children,\r\n clearMessagesOnDisconnect = true,\r\n messageHistoryLimit = 100,\r\n sessionSettings,\r\n verboseTranscription = true,\r\n withMicrophone = true,\r\n ...props\r\n}) => {\r\n const {\r\n timestamp: callDurationTimestamp,\r\n start: startTimer,\r\n stop: stopTimer,\r\n } = useCallDuration();\r\n\r\n const [status, setStatus] = useState({\r\n value: 'disconnected',\r\n });\r\n\r\n const [isPaused, setIsPaused] = useState(false);\r\n\r\n // error handling\r\n const [error, setError] = useState(null);\r\n const isError = error !== null;\r\n const isMicrophoneError = error?.type === 'mic_error';\r\n const isSocketError = error?.type === 'socket_error';\r\n const isAudioError = error?.type === 'audio_error';\r\n\r\n const onError = useRef(props.onError ?? noop);\r\n onError.current = props.onError ?? noop;\r\n\r\n const onClose = useRef(props.onClose ?? noop);\r\n onClose.current = props.onClose ?? noop;\r\n\r\n const onMessage = useRef(props.onMessage ?? noop);\r\n onMessage.current = props.onMessage ?? noop;\r\n\r\n const onAudioStart = useRef(props.onAudioStart ?? noop);\r\n onAudioStart.current = props.onAudioStart ?? noop;\r\n\r\n const onAudioEnd = useRef(props.onAudioEnd ?? noop);\r\n onAudioEnd.current = props.onAudioEnd ?? noop;\r\n\r\n const onInterruption = useRef(props.onInterruption ?? noop);\r\n onInterruption.current = props.onInterruption ?? noop;\r\n\r\n const toolStatus = useToolStatus();\r\n\r\n const messageStore = useMessages({\r\n sendMessageToParent: onMessage.current,\r\n messageHistoryLimit,\r\n });\r\n\r\n const updateError = useCallback((err: VoiceError | null) => {\r\n setError(err);\r\n if (err !== null) {\r\n onError.current?.(err);\r\n }\r\n }, []);\r\n\r\n const onClientError: NonNullable<\r\n Parameters[0]['onError']\r\n > = useCallback(\r\n (message, err) => {\r\n stopTimer();\r\n updateError({ type: 'socket_error', message, error: err });\r\n },\r\n [stopTimer, updateError],\r\n );\r\n\r\n const config = props;\r\n\r\n const player = useSoundPlayer({\r\n onError: (message) => {\r\n updateError({ type: 'audio_error', message });\r\n },\r\n onPlayAudio: (id: string) => {\r\n messageStore.onPlayAudio(id);\r\n onAudioStart.current(id);\r\n },\r\n onStopAudio: (id: string) => {\r\n onAudioEnd.current(id);\r\n },\r\n });\r\n\r\n const {\r\n streamRef,\r\n getStream,\r\n permission: micPermission,\r\n } = useEncoding({\r\n withMicrophone,\r\n });\r\n\r\n const client = useVoiceClient({\r\n onAudioMessage: (message: AudioOutputMessage) => {\r\n player.addToQueue(message);\r\n },\r\n onMessage: useCallback(\r\n (message: JSONMessage) => {\r\n // store message\r\n messageStore.onMessage(message);\r\n\r\n if (\r\n message.type === 'user_interruption' ||\r\n message.type === 'user_message'\r\n ) {\r\n if (player.isPlaying) {\r\n onInterruption.current(message);\r\n }\r\n player.clearQueue();\r\n }\r\n\r\n if (\r\n message.type === 'tool_call' ||\r\n message.type === 'tool_response' ||\r\n message.type === 'tool_error'\r\n ) {\r\n toolStatus.addToStore(message);\r\n }\r\n },\r\n [messageStore, player, toolStatus],\r\n ),\r\n onError: onClientError,\r\n onOpen: useCallback(() => {\r\n startTimer();\r\n messageStore.createConnectMessage();\r\n props.onOpen?.();\r\n }, [messageStore, props, startTimer]),\r\n onClose: useCallback<\r\n NonNullable\r\n >(\r\n (event) => {\r\n stopTimer();\r\n messageStore.createDisconnectMessage(event);\r\n onClose.current?.(event);\r\n },\r\n [messageStore, stopTimer],\r\n ),\r\n onToolCall: props.onToolCall,\r\n });\r\n\r\n const {\r\n sendAudio: clientSendAudio,\r\n sendUserInput: clientSendUserInput,\r\n sendAssistantInput: clientSendAssistantInput,\r\n sendSessionSettings: clientSendSessionSettings,\r\n sendToolMessage: clientSendToolMessage,\r\n sendPauseAssistantMessage,\r\n sendResumeAssistantMessage,\r\n } = client;\r\n\r\n const mic = useMicrophone({\r\n streamRef,\r\n withMicrophone,\r\n onAudioCaptured: useCallback(\r\n (arrayBuffer) => {\r\n try {\r\n clientSendAudio(arrayBuffer);\r\n } catch (e) {\r\n const message = e instanceof Error ? e.message : 'Unknown error';\r\n updateError({ type: 'socket_error', message });\r\n }\r\n },\r\n [clientSendAudio, updateError],\r\n ),\r\n onError: useCallback(\r\n (message) => {\r\n updateError({ type: 'mic_error', message });\r\n },\r\n [updateError],\r\n ),\r\n });\r\n\r\n const { clearQueue } = player;\r\n\r\n const pauseAssistant = useCallback(() => {\r\n try {\r\n sendPauseAssistantMessage();\r\n setIsPaused(true);\r\n } catch (e) {\r\n const message = e instanceof Error ? e.message : 'Unknown error';\r\n updateError({ type: 'socket_error', message });\r\n }\r\n clearQueue();\r\n }, [sendPauseAssistantMessage, clearQueue, updateError]);\r\n\r\n const resumeAssistant = useCallback(() => {\r\n try {\r\n sendResumeAssistantMessage();\r\n setIsPaused(false);\r\n } catch (e) {\r\n const message = e instanceof Error ? e.message : 'Unknown error';\r\n updateError({ type: 'socket_error', message });\r\n }\r\n }, [sendResumeAssistantMessage, updateError]);\r\n\r\n const connect = useCallback(async () => {\r\n updateError(null);\r\n setStatus({ value: 'connecting' });\r\n\r\n // Only get microphone permission if withMicrophone is true\r\n if (withMicrophone) {\r\n const permission = await getStream();\r\n if (permission === 'denied') {\r\n const error: VoiceError = {\r\n type: 'mic_error',\r\n message: 'Microphone permission denied',\r\n };\r\n updateError(error);\r\n return Promise.reject(error);\r\n }\r\n }\r\n\r\n try {\r\n await client.connect({\r\n ...config,\r\n verboseTranscription: true,\r\n });\r\n } catch (e) {\r\n const error: VoiceError = {\r\n type: 'socket_error',\r\n message: 'We could not connect to the voice. Please try again.',\r\n };\r\n updateError(error);\r\n return Promise.reject(error);\r\n }\r\n\r\n try {\r\n // Only start microphone if withMicrophone is true\r\n const promises = withMicrophone\r\n ? [mic.start(), player.initPlayer()]\r\n : [player.initPlayer()];\r\n\r\n const results = await Promise.allSettled(promises);\r\n\r\n if (results.every((result) => result.status === 'fulfilled')) {\r\n setStatus({ value: 'connected' });\r\n }\r\n } catch (e) {\r\n const error: VoiceError = {\r\n type: 'audio_error',\r\n message:\r\n e instanceof Error\r\n ? e.message\r\n : 'We could not connect to audio. Please try again.',\r\n };\r\n updateError(error);\r\n }\r\n }, [client, config, getStream, mic, player, updateError, withMicrophone]);\r\n\r\n const disconnectFromVoice = useCallback(() => {\r\n if (client.readyState !== VoiceReadyState.CLOSED) {\r\n client.disconnect();\r\n }\r\n player.stopAll();\r\n mic.stop();\r\n if (clearMessagesOnDisconnect) {\r\n messageStore.clearMessages();\r\n }\r\n toolStatus.clearStore();\r\n setIsPaused(false);\r\n }, [\r\n client,\r\n player,\r\n mic,\r\n clearMessagesOnDisconnect,\r\n toolStatus,\r\n messageStore,\r\n ]);\r\n\r\n const disconnect = useCallback(\r\n (disconnectOnError?: boolean) => {\r\n if (micPermission === 'denied') {\r\n setStatus({ value: 'error', reason: 'Microphone permission denied' });\r\n }\r\n\r\n stopTimer();\r\n\r\n disconnectFromVoice();\r\n\r\n if (status.value !== 'error' && !disconnectOnError) {\r\n // if status was 'error', keep the error status so we can show the error message to the end user.\r\n // otherwise, set status to 'disconnected'\r\n setStatus({ value: 'disconnected' });\r\n }\r\n },\r\n [micPermission, stopTimer, disconnectFromVoice, status.value],\r\n );\r\n\r\n useEffect(() => {\r\n if (\r\n error !== null &&\r\n status.value !== 'error' &&\r\n status.value !== 'disconnected'\r\n ) {\r\n // If the status is ever set to `error`, disconnect the voice.\r\n setStatus({ value: 'error', reason: error.message });\r\n disconnectFromVoice();\r\n }\r\n }, [status.value, disconnect, disconnectFromVoice, error]);\r\n\r\n useEffect(() => {\r\n // disconnect from socket when the voice provider component unmounts\r\n return () => {\r\n disconnectFromVoice();\r\n };\r\n // eslint-disable-next-line react-hooks/exhaustive-deps\r\n }, []);\r\n\r\n const sendUserInput = useCallback(\r\n (text: string) => {\r\n try {\r\n clientSendUserInput(text);\r\n } catch (e) {\r\n const message = e instanceof Error ? e.message : 'Unknown error';\r\n updateError({ type: 'socket_error', message });\r\n }\r\n },\r\n [clientSendUserInput, updateError],\r\n );\r\n\r\n const sendAssistantInput = useCallback(\r\n (text: string) => {\r\n try {\r\n clientSendAssistantInput(text);\r\n } catch (e) {\r\n const message = e instanceof Error ? e.message : 'Unknown error';\r\n updateError({ type: 'socket_error', message });\r\n }\r\n },\r\n [clientSendAssistantInput, updateError],\r\n );\r\n\r\n const sendSessionSettings = useCallback(\r\n (sessionSettings: Hume.empathicVoice.SessionSettings) => {\r\n try {\r\n clientSendSessionSettings(sessionSettings);\r\n } catch (e) {\r\n const message = e instanceof Error ? e.message : 'Unknown error';\r\n updateError({ type: 'socket_error', message });\r\n }\r\n },\r\n [clientSendSessionSettings, updateError],\r\n );\r\n\r\n useEffect(() => {\r\n if (\r\n client.readyState === VoiceReadyState.OPEN &&\r\n sessionSettings !== undefined &&\r\n Object.keys(sessionSettings).length > 0\r\n ) {\r\n clientSendSessionSettings(sessionSettings);\r\n }\r\n }, [client.readyState, clientSendSessionSettings, sessionSettings]);\r\n\r\n const sendToolMessage = useCallback(\r\n (\r\n message:\r\n | Hume.empathicVoice.ToolResponseMessage\r\n | Hume.empathicVoice.ToolErrorMessage,\r\n ) => {\r\n try {\r\n clientSendToolMessage(message);\r\n } catch (e) {\r\n const message = e instanceof Error ? e.message : 'Unknown error';\r\n updateError({ type: 'socket_error', message });\r\n }\r\n },\r\n [clientSendToolMessage, updateError],\r\n );\r\n\r\n const ctx = useMemo(\r\n () =>\r\n ({\r\n connect,\r\n disconnect,\r\n fft: player.fft,\r\n micFft: mic.fft,\r\n isMuted: mic.isMuted,\r\n isAudioMuted: player.isAudioMuted,\r\n isPlaying: player.isPlaying,\r\n messages: messageStore.messages,\r\n lastVoiceMessage: messageStore.lastVoiceMessage,\r\n lastUserMessage: messageStore.lastUserMessage,\r\n clearMessages: messageStore.clearMessages,\r\n mute: mic.mute,\r\n muteAudio: player.muteAudio,\r\n readyState: client.readyState,\r\n sendUserInput,\r\n sendAssistantInput,\r\n sendSessionSettings,\r\n pauseAssistant,\r\n resumeAssistant,\r\n sendToolMessage,\r\n status,\r\n unmute: mic.unmute,\r\n unmuteAudio: player.unmuteAudio,\r\n error,\r\n isAudioError,\r\n isError,\r\n isMicrophoneError,\r\n isSocketError,\r\n callDurationTimestamp,\r\n toolStatusStore: toolStatus.store,\r\n chatMetadata: messageStore.chatMetadata,\r\n playerQueueLength: player.queueLength,\r\n isPaused,\r\n }) satisfies VoiceContextType,\r\n [\r\n connect,\r\n disconnect,\r\n player.fft,\r\n player.isAudioMuted,\r\n player.isPlaying,\r\n player.muteAudio,\r\n player.unmuteAudio,\r\n player.queueLength,\r\n mic.fft,\r\n mic.isMuted,\r\n mic.mute,\r\n mic.unmute,\r\n messageStore.messages,\r\n messageStore.lastVoiceMessage,\r\n messageStore.lastUserMessage,\r\n messageStore.clearMessages,\r\n messageStore.chatMetadata,\r\n client.readyState,\r\n sendUserInput,\r\n sendAssistantInput,\r\n sendSessionSettings,\r\n pauseAssistant,\r\n resumeAssistant,\r\n sendToolMessage,\r\n status,\r\n error,\r\n isAudioError,\r\n isError,\r\n isMicrophoneError,\r\n isSocketError,\r\n callDurationTimestamp,\r\n toolStatus.store,\r\n isPaused,\r\n ],\r\n );\r\n\r\n return {children};\r\n};\r\n","export const noop = () => {};\r\n","import { intervalToDuration } from 'date-fns';\r\nimport { useCallback, useEffect, useRef, useState } from 'react';\r\n\r\nexport const useCallDuration = () => {\r\n const interval = useRef(null);\r\n const startTime = useRef(null);\r\n\r\n const [timestamp, setTimestamp] = useState(null);\r\n\r\n const start = useCallback(() => {\r\n startTime.current = Date.now();\r\n\r\n setTimestamp('00:00:00');\r\n\r\n interval.current = window.setInterval(() => {\r\n if (startTime.current) {\r\n const duration = intervalToDuration({\r\n start: startTime.current,\r\n end: Date.now(),\r\n });\r\n\r\n const hours = (duration.hours ?? 0).toString().padStart(2, '0');\r\n const minutes = (duration.minutes ?? 0).toString().padStart(2, '0');\r\n const seconds = (duration.seconds ?? 0).toString().padStart(2, '0');\r\n\r\n setTimestamp(`${hours}:${minutes}:${seconds}`);\r\n }\r\n }, 500);\r\n }, []);\r\n\r\n const stop = useCallback(() => {\r\n if (interval.current) {\r\n window.clearInterval(interval.current);\r\n interval.current = null;\r\n }\r\n }, []);\r\n\r\n const reset = useCallback(() => {\r\n setTimestamp(null);\r\n }, []);\r\n\r\n useEffect(() => {\r\n // clean up on unmount\r\n return () => {\r\n if (interval.current) {\r\n window.clearInterval(interval.current);\r\n interval.current = null;\r\n }\r\n };\r\n }, []);\r\n\r\n return { timestamp, start, stop, reset };\r\n};\r\n","// cspell:ignore dataavailable\r\nimport { checkForAudioTracks, getAudioStream } from 'hume';\r\nimport { useCallback, useRef, useState } from 'react';\r\n\r\ntype PermissionStatus = 'prompt' | 'granted' | 'denied';\r\n\r\ntype UseEncodingProps = {\r\n withMicrophone: boolean;\r\n};\r\n\r\nconst useEncoding = (\r\n { withMicrophone }: UseEncodingProps = { withMicrophone: true },\r\n) => {\r\n const [permission, setPermission] = useState('prompt');\r\n const streamRef = useRef(null);\r\n\r\n const getStream = useCallback(async () => {\r\n if (!withMicrophone) {\r\n setPermission('granted');\r\n return 'granted' as const;\r\n }\r\n\r\n try {\r\n const stream = await getAudioStream();\r\n setPermission('granted');\r\n streamRef.current = stream;\r\n checkForAudioTracks(stream);\r\n return 'granted' as const;\r\n } catch (e) {\r\n setPermission('denied');\r\n streamRef.current = null;\r\n return 'denied' as const;\r\n }\r\n }, [withMicrophone]);\r\n\r\n return {\r\n streamRef,\r\n getStream,\r\n permission,\r\n };\r\n};\r\n\r\nexport { useEncoding };\r\n","import type { CloseEvent } from 'hume/core';\r\nimport { useCallback, useState } from 'react';\r\n\r\nimport type { ConnectionMessage } from './connection-message';\r\nimport type {\r\n AssistantTranscriptMessage,\r\n ChatMetadataMessage,\r\n JSONMessage,\r\n UserTranscriptMessage,\r\n} from '../models/messages';\r\nimport { keepLastN } from '../utils';\r\n\r\nexport const useMessages = ({\r\n sendMessageToParent,\r\n messageHistoryLimit,\r\n}: {\r\n sendMessageToParent?: (message: JSONMessage) => void;\r\n messageHistoryLimit: number;\r\n}) => {\r\n const [voiceMessageMap, setVoiceMessageMap] = useState<\r\n Record\r\n >({});\r\n\r\n const [messages, setMessages] = useState<\r\n Array\r\n >([]);\r\n\r\n const [lastVoiceMessage, setLastVoiceMessage] =\r\n useState(null);\r\n const [lastUserMessage, setLastUserMessage] =\r\n useState(null);\r\n\r\n const [chatMetadata, setChatMetadata] = useState(\r\n null,\r\n );\r\n\r\n const createConnectMessage = useCallback(() => {\r\n setMessages((prev) =>\r\n prev.concat([\r\n {\r\n type: 'socket_connected',\r\n receivedAt: new Date(),\r\n },\r\n ]),\r\n );\r\n }, []);\r\n\r\n const createDisconnectMessage = useCallback((event: CloseEvent) => {\r\n setMessages((prev) =>\r\n prev.concat([\r\n {\r\n type: 'socket_disconnected',\r\n code: event.code,\r\n reason: event.reason,\r\n receivedAt: new Date(),\r\n },\r\n ]),\r\n );\r\n }, []);\r\n\r\n const onMessage = useCallback(\r\n (message: JSONMessage) => {\r\n /* \r\n 1. message comes in from the backend\r\n - if the message IS NOT AssistantTranscriptMessage, store in `messages` immediately \r\n - if the message is an AssistantTranscriptMessage, stored in `voiceMessageMap`\r\n 2. audio clip plays\r\n - find the AssistantTranscriptMessage with a matching ID, and store it in `messages`\r\n - remove the AssistantTranscriptMessage from `voiceMessageMap`\r\n */\r\n switch (message.type) {\r\n case 'assistant_message':\r\n // for assistant messages, `sendMessageToParent` is called in `onPlayAudio`\r\n // in order to line up the transcript event with the correct audio clip\r\n setVoiceMessageMap((prev) => ({\r\n ...prev,\r\n [`${message.id}`]: message,\r\n }));\r\n break;\r\n case 'user_message':\r\n sendMessageToParent?.(message);\r\n\r\n // Exclude interim messages from the messages array.\r\n // If end users want to see interim messages, they can use the onMessage\r\n // callback because we are still sending them via `sendMessageToParent`.\r\n if (message.interim === false) {\r\n setLastUserMessage(message);\r\n setMessages((prev) => {\r\n return keepLastN(messageHistoryLimit, prev.concat([message]));\r\n });\r\n }\r\n\r\n break;\r\n case 'user_interruption':\r\n case 'error':\r\n case 'tool_call':\r\n case 'tool_response':\r\n case 'tool_error':\r\n case 'assistant_end':\r\n sendMessageToParent?.(message);\r\n setMessages((prev) => {\r\n return keepLastN(messageHistoryLimit, prev.concat([message]));\r\n });\r\n break;\r\n case 'chat_metadata':\r\n sendMessageToParent?.(message);\r\n setMessages((prev) => {\r\n return keepLastN(messageHistoryLimit, prev.concat([message]));\r\n });\r\n setChatMetadata(message);\r\n break;\r\n default:\r\n break;\r\n }\r\n },\r\n [messageHistoryLimit, sendMessageToParent],\r\n );\r\n\r\n const onPlayAudio = useCallback(\r\n (id: string) => {\r\n const matchingTranscript = voiceMessageMap[id];\r\n if (matchingTranscript) {\r\n sendMessageToParent?.(matchingTranscript);\r\n setLastVoiceMessage(matchingTranscript);\r\n setMessages((prev) => {\r\n return keepLastN(\r\n messageHistoryLimit,\r\n prev.concat([matchingTranscript]),\r\n );\r\n });\r\n // remove the message from the map to ensure we don't\r\n // accidentally push it to the messages array more than once\r\n setVoiceMessageMap((prev) => {\r\n const newMap = { ...prev };\r\n delete newMap[id];\r\n return newMap;\r\n });\r\n }\r\n },\r\n [voiceMessageMap, sendMessageToParent, messageHistoryLimit],\r\n );\r\n\r\n const clearMessages = useCallback(() => {\r\n setMessages([]);\r\n setLastVoiceMessage(null);\r\n setLastUserMessage(null);\r\n setVoiceMessageMap({});\r\n }, []);\r\n\r\n return {\r\n createConnectMessage,\r\n createDisconnectMessage,\r\n onMessage,\r\n onPlayAudio,\r\n clearMessages,\r\n messages,\r\n lastVoiceMessage,\r\n lastUserMessage,\r\n chatMetadata,\r\n };\r\n};\r\n","export const keepLastN = (n: number, arr: T[]): T[] => {\r\n if (arr.length <= n) {\r\n return arr;\r\n }\r\n return arr.slice(arr.length - n);\r\n};\r\n","import { useCallback, useState } from 'react';\r\n\r\nimport type { ToolCall, ToolError, ToolResponse } from '../models/messages';\r\n\r\nexport const useToolStatus = () => {\r\n const [store, setStore] = useState<\r\n Record<\r\n string,\r\n {\r\n call?: ToolCall;\r\n resolved?: ToolResponse | ToolError;\r\n }\r\n >\r\n >({});\r\n\r\n const addToStore = useCallback(\r\n (message: ToolCall | ToolResponse | ToolError) => {\r\n setStore((prev) => {\r\n const entry = {\r\n ...prev[message.toolCallId],\r\n };\r\n\r\n if (message.type === 'tool_call') {\r\n entry.call = message;\r\n }\r\n\r\n if (message.type === 'tool_response' || message.type === 'tool_error') {\r\n entry.resolved = message;\r\n }\r\n\r\n return {\r\n ...prev,\r\n [message.toolCallId]: entry,\r\n };\r\n });\r\n },\r\n [],\r\n );\r\n\r\n const clearStore = useCallback(() => {\r\n setStore({});\r\n }, []);\r\n\r\n return {\r\n store,\r\n addToStore,\r\n clearStore,\r\n };\r\n};\r\n","export class SocketUnknownMessageError extends Error {\r\n constructor(message?: string) {\r\n super(`Unknown message type.${message ? ' ' + message : ''}`);\r\n this.name = 'SocketUnknownMessageError';\r\n }\r\n}\r\n\r\n/**\r\n * @name isSocketUnknownMessageError\r\n * @description\r\n * Check if an error is a SocketUnknownMessageError.\r\n * @param err - The error to check.\r\n * @returns\r\n * `true` if the error is a SocketUnknownMessageError.\r\n * @example\r\n * ```ts\r\n * if (isSocketUnknownMessageError(err)) {\r\n * console.error('Unknown message type');\r\n * }\r\n * ```\r\n */\r\nexport const isSocketUnknownMessageError = (\r\n err: unknown,\r\n): err is SocketUnknownMessageError => {\r\n return err instanceof SocketUnknownMessageError;\r\n};\r\n\r\nexport class SocketFailedToParseMessageError extends Error {\r\n constructor(message?: string) {\r\n super(\r\n `Failed to parse message from socket.${message ? ' ' + message : ''}`,\r\n );\r\n this.name = 'SocketFailedToParseMessageError';\r\n }\r\n}\r\n\r\n/**\r\n * @name isSocketFailedToParseMessageError\r\n * @description\r\n * Check if an error is a SocketFailedToParseMessageError.\r\n * @param err - The error to check.\r\n * @returns\r\n * `true` if the error is a SocketFailedToParseMessageError.\r\n * @example\r\n * ```ts\r\n * if (isSocketFailedToParseMessageError(err)) {\r\n * console.error('Failed to parse message from socket');\r\n * }\r\n * ```\r\n */\r\nexport const isSocketFailedToParseMessageError = (\r\n err: unknown,\r\n): err is SocketFailedToParseMessageError => {\r\n return err instanceof SocketFailedToParseMessageError;\r\n};\r\n","import { type Hume } from 'hume';\r\nimport { SubscribeEvent } from 'hume/serialization/resources/empathicVoice/index.js';\r\n\r\nimport { type AudioMessage, parseAudioMessage } from './audio-message';\r\nimport {\r\n SocketFailedToParseMessageError,\r\n SocketUnknownMessageError,\r\n} from './errors';\r\n\r\n/**\r\n * @name parseMessageData\r\n * @description\r\n * Parse the data of a message from the socket.\r\n * @param data - The data to parse.\r\n * @returns\r\n * The parsed message data.\r\n * @example\r\n * ```ts\r\n * const message = await parseMessageData(data);\r\n * ```\r\n */\r\nexport const parseMessageData = async (\r\n data: unknown,\r\n): Promise<\r\n | {\r\n success: true;\r\n message: Hume.empathicVoice.SubscribeEvent | AudioMessage;\r\n }\r\n | {\r\n success: false;\r\n error: Error;\r\n }\r\n> => {\r\n if (data instanceof Blob) {\r\n const message = await parseAudioMessage(data);\r\n\r\n if (message) {\r\n return {\r\n success: true,\r\n message,\r\n };\r\n } else {\r\n return {\r\n success: false,\r\n error: new SocketFailedToParseMessageError(\r\n `Received blob was unable to be converted to ArrayBuffer.`,\r\n ),\r\n };\r\n }\r\n }\r\n\r\n if (typeof data !== 'string') {\r\n return {\r\n success: false,\r\n error: new SocketFailedToParseMessageError(\r\n `Expected a string but received ${typeof data}.`,\r\n ),\r\n };\r\n }\r\n\r\n const parseResponse = SubscribeEvent.parse(data);\r\n\r\n if (!parseResponse.ok) {\r\n return {\r\n success: false,\r\n error: new SocketUnknownMessageError(\r\n `Received JSON was not a known message type.`,\r\n ),\r\n };\r\n }\r\n\r\n return {\r\n success: true,\r\n message: parseResponse.value,\r\n };\r\n};\r\n\r\n/**\r\n * @name parseMessageType\r\n * @description\r\n * Parse the type of a message from the socket.\r\n * @param event - The event to parse.\r\n * @returns\r\n * The parsed message type.\r\n * @example\r\n * ```ts\r\n * const message = await parseMessageType(event);\r\n * ```\r\n */\r\nexport const parseMessageType = async (\r\n event: MessageEvent,\r\n): Promise<\r\n | {\r\n success: true;\r\n message: Hume.empathicVoice.SubscribeEvent | AudioMessage;\r\n }\r\n | {\r\n success: false;\r\n error: Error;\r\n }\r\n> => {\r\n const data: unknown = event.data;\r\n return parseMessageData(data);\r\n};\r\n","import z from 'zod';\r\n\r\nexport const AudioMessageSchema = z\r\n .object({\r\n type: z.literal('audio'),\r\n data: z.instanceof(ArrayBuffer),\r\n })\r\n .transform((obj) => {\r\n return Object.assign(obj, {\r\n receivedAt: new Date(),\r\n });\r\n });\r\n\r\nexport type AudioMessage = z.infer;\r\n\r\nexport const parseAudioMessage = async (\r\n blob: Blob,\r\n): Promise => {\r\n return blob\r\n .arrayBuffer()\r\n .then((buffer) => {\r\n return {\r\n type: 'audio' as const,\r\n data: buffer,\r\n receivedAt: new Date(),\r\n };\r\n })\r\n .catch(() => {\r\n return null;\r\n });\r\n};\r\n","export enum Channels {\r\n /** Mono */\r\n MONO = 1,\r\n /** Stereo */\r\n STEREO = 2,\r\n}\r\n\r\nexport enum AudioEncoding {\r\n /** 16-bit signed little-endian (PCM) */\r\n LINEAR16 = 'linear16',\r\n /** Ogg Opus */\r\n OPUS = 'opus',\r\n}\r\n","export enum LanguageModelOption {\r\n CLAUDE_3_OPUS = 'CLAUDE_3_OPUS',\r\n CLAUDE_3_SONNET = 'CLAUDE_3_SONNET',\r\n CLAUDE_3_HAIKU = 'CLAUDE_3_HAIKU',\r\n CLAUDE_21 = 'CLAUDE_21',\r\n CLAUDE_INSTANT_12 = 'CLAUDE_INSTANT_12',\r\n GPT_4_TURBO_PREVIEW = 'GPT_4_TURBO_PREVIEW',\r\n GPT_35_TURBO_0125 = 'GPT_35_TURBO_0125',\r\n GPT_35_TURBO = 'GPT_35_TURBO',\r\n FIREWORKS_MIXTRAL_8X7B = 'FIREWORKS_MIXTRAL_8X7B',\r\n}\r\n","import type {\r\n AssistantEnd,\r\n AssistantMessage,\r\n AudioInput,\r\n AudioOutput,\r\n ChatMetadata,\r\n JsonMessage,\r\n ToolCallMessage,\r\n ToolErrorMessage,\r\n ToolResponseMessage,\r\n UserInterruption,\r\n UserMessage,\r\n WebSocketError,\r\n} from 'hume/api/resources/empathicVoice';\r\nimport z from 'zod';\r\n\r\ntype WithReceivedAt = T & { receivedAt: Date };\r\n\r\nexport type AssistantEndMessage = WithReceivedAt;\r\nexport type AssistantTranscriptMessage = WithReceivedAt;\r\nexport type AudioMessage = WithReceivedAt;\r\nexport type AudioOutputMessage = WithReceivedAt;\r\nexport type ChatMetadataMessage = WithReceivedAt;\r\nexport type JSONErrorMessage 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