voice-commands.min.js

'use strict';(function(){var SpeechRecognition=window.SpeechRecognition||window.webkitSpeechRecognition||window.mozSpeechRecognition||window.oSpeechRecognition||window.msSpeechRecognition;var recognition;var recognizing=false;var lang='en-US';var commands=[];if(!window.console){window.console={log:function(){}};}
var now=Date.now||function(){return new Date().getTime();};var debounce=function(func,wait,immediate){var timeout,args,context,timestamp,result;var later=function(){var last=now()-timestamp;if(last<wait){timeout=setTimeout(later,wait-last);}else{timeout=null;if(!immediate){result=func.apply(context,args);context=args=null;}}};return function(){context=this;args=arguments;timestamp=now();var callNow=immediate&&!timeout;if(!timeout){timeout=setTimeout(later,wait);}
if(callNow){result=func.apply(context,args);context=args=null;}
return result;};};var executeVoiceCommand=debounce(function(cmd){cmd();},700,true);window.SPEECH={_onStart:function(){},_onStop:function(){},_onResult:function(){},onStart:function(fn){this._onStart=fn;},onStop:function(fn){this._onStop=fn;},onResult:function(fn){this._onResult=fn;},isCapable:function(){return recognition!==undefined;},stop:function(){if(recognizing){recognizing=false;recognition.stop();}},start:function(config){if(config){if(config.min_confidence){this.min_confidence=config.min_confidence;}if(config.lang){recognition.lang = config.lang;}}
if(recognizing){recognition.stop();return;}
recognition.start();},min_confidence:.5,addVoiceCommand:function(c){if(typeof c.command==='string'){c.command=new RegExp(c.command,'i');}
c.min_confidence=c.min_confidence||this.min_confidence;commands.push(c);},addVoiceCommands:function(commands){var c,cl=commands.length;for(c=0;c<cl;c++){this.addVoiceCommand(commands[c]);}}};if(SpeechRecognition){recognition=new SpeechRecognition();recognition.continuous=true;recognition.interimResults=true;recognition.onstart=function(){recognizing=true;SPEECH._onStart();};recognition.onerror=function(event){SPEECH._onStop();};recognition.onend=function(){recognizing=false;SPEECH._onStop();};recognition.onresult=function(event){var transcript='';if(!event.results){recognition.onend=null;recognition.stop();return;}
var i,il=event.results.length;for(i=event.resultIndex;i<il;++i){var result=event.results[i];var confidence=result[0].confidence;if(result.isFinal){transcript+=result[0].transcript;}else{transcript+=result[0].transcript;}}
console.log(transcript,confidence);for(var c in commands){var cmd=commands[c];if(transcript.match(cmd.command)&&(confidence>cmd.min_confidence)){executeVoiceCommand(cmd.callback);}}
SPEECH._onResult({transcript:transcript,confidence:confidence});};}}());