@hamsa-ai/voice-agents-sdk/dist/index.esm.js

Hamsa AI - Voice Agents JavaScript SDK

/*! For license information please see index.esm.js.LICENSE.txt */
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i=window.AudioContext||window.webkitAudioContext;this.audioContext=new i({sampleRate:16e3}),this.ws=t,this.isPaused=!1,this.onSpeakingCB=e,this.onListeningCB=r,this.isPlaying=!1,this.gainNode=this.audioContext.createGain(),this.gainNode.gain.value=1,this.mediaStreamDestination=this.audioContext.createMediaStreamDestination(),this.gainNode.connect(this.audioContext.destination),this.gainNode.connect(this.mediaStreamDestination),this.onStreamReady=n,this.initAudioWorklet()}async initAudioWorklet(){try{await this.audioContext.audioWorklet.addModule(i()),this.processor=new AudioWorkletNode(this.audioContext,"audio-player-processor"),this.processor.port.onmessage=t=>{"mark"===t.data.type?this.ws.send(JSON.stringify({event:"mark",streamSid:"WEBSDK",mark:{name:t.data.markName}})):"finished"===t.data.type&&this.updatePlayingState(!1)},this.processor.connect(this.gainNode),this.onStreamReady&&this.onStreamReady(this.getMediaStream())}catch(t){console.error("Failed to load AudioWorklet module",t)}}enqueueAudio(e){const r=t.hp.from(e,"base64"),n=this.pcm16ToFloat32(r);this.processor.port.postMessage({type:"enqueue",audioSamples:n}),this.updatePlayingState(!0)}pause(){this.isPaused=!0,this.processor.port.postMessage({type:"pause"})}resume(){this.isPaused=!1,this.processor.port.postMessage({type:"resume"})}stopAndClear(){this.processor.port.postMessage({type:"clear"}),this.updatePlayingState(!1)}addMark(t){this.processor.port.postMessage({type:"addMark",markName:t})}pcm16ToFloat32(t){const e=new Float32Array(t.length/2),r=new DataView(t.buffer);for(let n=0,i=0;n<t.byteLength;n+=2,i++){const t=r.getInt16(n,!0);e[i]=t/32768}return e}updatePlayingState(t){t&&!this.isPlaying?(this.isPlaying=!0,this.onSpeakingCB&&this.onSpeakingCB()):!t&&this.isPlaying&&(this.isPlaying=!1,this.onListeningCB&&this.onListeningCB())}setVolume(t){const e=Math.min(1,Math.max(0,t));this.gainNode.gain.setValueAtTime(e,this.audioContext.currentTime)}getMediaStream(){return this.mediaStreamDestination.stream}}var s=r(428),a=r.n(s);class u{constructor(t){this.audioContext=null,this.mediaStreamSource=null,this.audioWorkletNode=null,this.mediaStream=null,this.isPaused=!1,this.mediaStreamDestination=null,this.onStreamReady=t}async startStreaming(t){try{this.mediaStream=await navigator.mediaDevices.getUserMedia({audio:{echoCancellation:!0,noiseSuppression:!0,autoGainControl:!1},video:!1}),this.audioContext=new(window.AudioContext||window.webkitAudioContext)({sampleRate:16e3}),await this.audioContext.audioWorklet.addModule(a()),this.mediaStreamSource=this.audioContext.createMediaStreamSource(this.mediaStream),this.audioWorkletNode=new AudioWorkletNode(this.audioContext,"audio-processor"),this.mediaStreamDestination=this.audioContext.createMediaStreamDestination(),this.audioWorkletNode.connect(this.audioContext.destination),this.audioWorkletNode.connect(this.mediaStreamDestination),this.mediaStreamSource.connect(this.audioWorkletNode),this.audioWorkletNode.port.onmessage=e=>{this.isPaused||t&&t.readyState===WebSocket.OPEN&&t.send(JSON.stringify(e.data))},this.onStreamReady&&this.onStreamReady(this.getMediaStream())}catch(t){"NotAllowedError"===t.name?(console.error("Microphone access denied by the user.",t),alert("Microphone access was denied. Please allow access to use the audio features.")):"NotFoundError"===t.name||"DevicesNotFoundError"===t.name?(console.error("No microphone device found.",t),alert("No microphone was found on this device.")):"NotReadableError"===t.name||"TrackStartError"===t.name?(console.error("Microphone is already in use by another application.",t),alert("The microphone is currently in use by another application.")):"AbortError"===t.name?(console.error("The user aborted the request.",t),alert("Microphone access request was aborted. Please try again.")):(console.error("Error accessing the microphone: ",t),alert("An unknown error occurred while trying to access the microphone."))}}pause(){this.isPaused=!0}resume(){this.isPaused=!1}stop(){this.mediaStream&&this.mediaStream.getTracks().forEach((t=>t.stop())),this.mediaStreamDestination&&(this.mediaStreamDestination.disconnect(),this.mediaStreamDestination=null),this.audioWorkletNode&&this.audioWorkletNode.disconnect(),this.mediaStreamSource&&this.mediaStreamSource.disconnect(),this.audioContext&&this.audioContext.close(),this.audioContext=null,this.mediaStreamSource=null,this.audioWorkletNode=null,this.mediaStream=null,this.isPaused=!1}getMediaStream(){return this.mediaStreamDestination?this.mediaStreamDestination.stream:null}}class h{constructor(t,e,r,n,i,o,s,a,u,h,c,f,l,p){this.url=`${t}/${e}?api_key=${f}`,this.ws=null,this.isConnected=!1,this.audioPlayer=null,this.audioRecorder=null,this.last_transcription_date=new Date,this.last_voice_byte_date=new Date,this.is_media=!1,this.onErrorCB=r,this.onStartCB=n,this.onTranscriptionReceivedCB=i,this.onAnswerReceivedCB=o,this.onSpeakingCB=s,this.onListeningCB=a,this.onClosedCB=u,this.voiceEnablement=h,this.tools=c,this.apiKey=f,this.onRemoteStreamAvailable=l,this.onLocalStreamAvailable=p,this.setVolume=this.setVolume.bind(this)}startCall(){try{this.ws||(this.ws=new WebSocket(this.url),this.ws.onopen=this.onOpen.bind(this),this.ws.onmessage=this.onMessage.bind(this),this.ws.onclose=this.onClose.bind(this),this.ws.onerror=this.onError.bind(this),this.audioPlayer=new o(this.ws,this.onSpeakingCB,this.onListeningCB,(t=>{this.onRemoteStreamAvailable(t)})),this.audioRecorder=new u((t=>{this.onLocalStreamAvailable(t)})))}catch(t){console.log(t),this.onErrorCB(t)}}onOpen(){this.ws&&this.ws.send(JSON.stringify({event:"start",streamSid:"WEBSDK"})),this.isConnected=!0,this.onStartCB(),this.audioRecorder&&this.audioRecorder.startStreaming(this.ws).then((()=>{})).catch((t=>{console.error("Failed to start AudioRecorder:",t),this.onErrorCB(t)}))}onMessage(t){try{const e=JSON.parse(t.data);if(!e.event)throw new Error("Message does not contain event type.");switch(e.event){case"media":e.media&&this.audioPlayer.enqueueAudio(e.media.payload);break;case"clear":this.audioPlayer.stopAndClear();break;case"mark":this.audioPlayer.addMark(e.mark.name);break;case"transcription":this.onTranscriptionReceivedCB&&this.onTranscriptionReceivedCB(e.content);break;case"answer":this.onAnswerReceivedCB&&this.onAnswerReceivedCB(e.content);break;case"tools":this.run_tools(e.content).then((t=>{this.ws.send(JSON.stringify({event:"tools_response",tools_response:t,streamSid:"WEBSDK"}))})).catch((t=>{console.error("Error running tools:",t),this.onErrorCB(t)}));break;default:console.warn(`Unhandled event type: ${e.event}`)}}catch(t){console.error("Error handling message:",t),this.onErrorCB(t)}}onClose(t){this.isConnected=!1,this.onClosedCB(),this.audioPlayer.stopAndClear(),this.audioRecorder.stop(),this.#t(),this.ws=null}onError(t){this.onErrorCB&&this.onErrorCB(t)}endCall(){try{this.audioPlayer&&this.audioPlayer.stopAndClear(),this.audioRecorder&&this.audioRecorder.stop(),this.ws&&this.ws.send(JSON.stringify({event:"stop"})),this.#t(),this.isConnected=!1,this.onClosedCB()}catch(t){console.error("Error ending the call:",t),this.onErrorCB(t)}}pauseCall(){try{this.audioPlayer&&this.audioPlayer.pause(),this.audioRecorder&&this.audioRecorder.pause()}catch(t){console.error("Error pausing the call:",t),this.onErrorCB(t)}}resumeCall(){try{this.audioPlayer&&this.audioPlayer.resume(),this.audioRecorder&&this.audioRecorder.resume()}catch(t){console.error("Error resuming the call:",t),this.onErrorCB(t)}}setVolume(t){try{this.audioPlayer&&this.audioPlayer.setVolume(t)}catch(t){console.error("Error setting volume:",t),this.onErrorCB(t)}}async run_tools(t){return await Promise.all(t.map((async t=>{if("function"===t.type){const e=this.#e(t.function.name),r=t.function.name,n=JSON.parse(t.function.arguments);if(!e||"function"!=typeof e.fn)return console.log(`Function ${r} is not defined`),{id:t.id,function:{name:r,response:"Error could not find the function"}};try{const i=await e.fn(...Object.values(n));return{id:t.id,function:{name:r,response:i}}}catch(e){return console.error(`Error running function ${r}:`,e),{id:t.id,function:{name:r,response:"Error executing the function: "+e.message}}}}return null})))}#e(t){return this.tools.find((e=>e.function_name===t))||null}#t(){this.ws&&this.ws.readyState===WebSocket.OPEN&&this.ws.close(1e3,"Normal Closure")}}class c{constructor(){this._wakeLock=null}async acquire(){if("wakeLock"in navigator)try{this._wakeLock=await navigator.wakeLock.request("screen"),this._wakeLock.addEventListener("release",(()=>{this._wakeLock=null}))}catch(t){console.error(`Failed to acquire screen wake lock: ${t.name}, ${t.message}`)}else console.warn("Screen Wake Lock API is not supported in this browser.")}async release(){if(null!==this._wakeLock)try{await this._wakeLock.release(),this._wakeLock=null}catch(t){console.error(`Error releasing screen wake lock: ${t.name}, ${t.message}`)}}isActive(){return null!==this._wakeLock}}var f=r(7);class l extends f.EventEmitter{constructor(t,{API_URL:e="https://api.tryhamsa.com",WS_URL:r="wss://bots.tryhamsa.com/stream"}={}){super(),this.webSocketManager=null,this.apiKey=t,this.API_URL=e,this.WS_URL=r,this.jobId=null,this.wakeLockManager=new c}setVolume(t){this.webSocketManager&&this.webSocketManager.setVolume(t)}async start({agentId:t=null,params:e={},voiceEnablement:r=!1,tools:n=[]}){try{const i=await this.#r(t,e,r,n);if(!i)throw new Error("Failed to initialize conversation.");this.jobId=i,this.webSocketManager=new h(this.WS_URL,i,(t=>this.emit("error",t)),(()=>this.emit("start")),(t=>this.emit("transcriptionReceived",t)),(t=>this.emit("answerReceived",t)),(()=>this.emit("speaking")),(()=>this.emit("listening")),(()=>this.emit("closed")),r,n,this.apiKey,(t=>this.emit("remoteAudioStreamAvailable",t)),(t=>this.emit("localAudioStreamAvailable",t))),this.webSocketManager.startCall();try{await this.wakeLockManager.acquire()}catch(t){console.error("Failed to acquire wake lock:",t)}this.emit("callStarted")}catch(t){this.emit("error",new Error("Error in starting the call! Make sure you initialized the client with init()."))}}end(){try{this.webSocketManager&&(this.webSocketManager.endCall(),this.emit("callEnded")),this.wakeLockManager?.isActive()&&this.wakeLockManager.release().catch((t=>console.error("Error in releasing wake lock:",t)))}catch(t){this.emit("error",new Error("Error in ending the call! Make sure you initialized the client with init()."))}}pause(){this.webSocketManager&&(this.webSocketManager.pauseCall(),this.wakeLockManager?.isActive()&&this.wakeLockManager.release().catch((t=>console.error("Error in releasing wake lock:",t))),this.emit("callPaused"))}resume(){this.webSocketManager&&(this.webSocketManager.resumeCall(),this.wakeLockManager.acquire().catch((t=>console.error("Error acquiring wake lock on resume:",t))),this.emit("callResumed"))}async getJobDetails(t=5,e=1e3,r=2){if(!this.jobId)throw new Error("Cannot fetch job details: jobId is not set. Start a conversation first.");const n=`${this.API_URL}/v1/voice-agents/conversation/${this.jobId}`,i={Authorization:`Token ${this.apiKey}`,"Content-Type":"application/json"},o=new URLSearchParams({jobId:this.jobId});let s=e;const a=async(e=1)=>{try{const t=await fetch(`${n}?${o.toString()}`,{method:"GET",headers:i});if(!t.ok){const e=await t.text();throw new Error(`API Error: ${t.status} ${t.statusText} - ${e}`)}const e=await t.json();if("COMPLETED"===e.data.status)return e.data;throw new Error(`Job status is not COMPLETED: ${e.data.status}`)}catch(n){if(e<t)return console.warn(`Attempt ${e} failed: ${n.message}. Retrying in ${s/1e3} seconds...`),await this.#n(s),s*=r,a(e+1);throw new Error(`Failed to fetch job details after ${t} attempts: ${n.message}`)}};return a()}async#r(t,e,r,n){const i={Authorization:`Token ${this.apiKey}`,"Content-Type":"application/json"},o={voiceAgentId:t,params:e,voiceEnablement:r,tools:n?.length>0?this.#i(n):[]},s={method:"POST",headers:i,body:JSON.stringify(o),redirect:"follow"};try{const t=await fetch(`${this.API_URL}/v1/voice-agents/conversation-init`,s);return(await t.json()).data.jobId}catch(t){return this.emit("error",new Error("Error in initializing the call. Please double-check your API_KEY and ensure you have sufficient funds in your balance.")),null}}#i(t){return t.map((t=>{const e={type:"function",function:{name:t.function_name,description:t.description,parameters:{type:"object",properties:t.parameters?.reduce(((t,e)=>(t[e.name]={type:e.type,description:e.description},t)),{})||{},required:t.required||[]}}};return t.func_map&&(e.function.func_map=t.func_map),e}))}#n(t){return new Promise((e=>setTimeout(e,t)))}}})();var i=n.e;export{i as HamsaVoiceAgent};