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angular-adaptive-speech.js
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angular-adaptive-speech.js
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/*!
* angular-adaptive-speech v0.3.0
* The MIT License
* Copyright (c) 2014 Jan Antala
*/
(function() {
var callCommands = function(tasks, DEST_LANG, utterance, reference){
reference = reference || '.+';
var commands = [];
if (angular.isArray(tasks)) {
commands = tasks;
}
else {
commands.push(tasks);
}
commands.forEach(function(command){
if (command.lang !== DEST_LANG) {
return false;
}
var regex = command.regex || null;
if (utterance.match(regex)) {
if (utterance.match(new RegExp(reference, 'ig'))) {
command.call(utterance);
}
}
});
};
/**
* @ngdoc overview
* @name adaptive.speech
*
* @description
* `adaptive.speech` is an Angular module which provides you with speech recognition
* API's. Use its service to control your web app using speech commands. It's based
* on Chrome's speech recognition API.
*/
var adaptive = angular.module('adaptive.speech', []);
adaptive.provider('$speechCorrection', function() {
this.STORAGE_ID = 'adaptive:speech:correction';
this.$get = function() {
var STORAGE_ID = this.STORAGE_ID;
var correctionMap = JSON.parse(localStorage.getItem(STORAGE_ID) || '{}');
var save = function(STORAGE_ID, correctionMap){
localStorage.setItem(STORAGE_ID, JSON.stringify(correctionMap));
};
var addUtterance = function(utterance, correction, lang){
correctionMap[lang] = correctionMap[lang] || {};
correctionMap[lang][utterance] = correction;
};
var removeUtterance = function(utterance, lang){
delete correctionMap.lang[utterance];
};
var addLangMap = function(lang, map){
correctionMap[lang] = correctionMap[lang] || {};
correctionMap[lang] = map;
};
var clearLangMap = function(lang){
delete correctionMap[lang];
};
var getCorrectionMap = function(){
return correctionMap;
};
var getLangMap = function(lang){
return correctionMap[lang];
};
var getCorrection = function(utterance, lang){
return ((correctionMap[lang] && correctionMap[lang][utterance]) || utterance);
};
return {
addUtterance: function(utterance, correction, lang){
addUtterance(utterance, correction, lang);
save(STORAGE_ID, correctionMap);
},
removeUtterance: function(utterance, lang){
removeUtterance(utterance, lang);
save(STORAGE_ID, correctionMap);
},
addLangMap: function(lang, map){
addLangMap(lang, map);
save(STORAGE_ID, correctionMap);
},
clearLangMap: function(lang){
clearLangMap(lang);
save(STORAGE_ID, correctionMap);
},
getCorrectionMap: function(){
return getCorrectionMap();
},
getLangMap: function(lang){
return getLangMap(lang);
},
getCorrection: function(utterance, lang){
return getCorrection(utterance, lang);
}
};
};
});
adaptive.provider('$speechSynthetis', function() {
this.corsProxyServer = 'http://www.corsproxy.com/';
this.$get = function() {
var corsProxyServer = this.corsProxyServer;
var justSpoke = false;
/**
* @ngdoc function
* @name adaptive.speech.$speechSynthetis#speak
* @methodOf apdative.speech.$speechSynthetis
*
* @description
* Let's your computer speak to you. Simply pass a string with a text
* you want your computer to say.
*
* @param {string} text Text
* @param {string} lang Language
*/
var speak = function(text, lang){
if (!text) {
return false;
}
var audioURL = [corsProxyServer, 'translate.google.com/translate_tts?ie=UTF-8&q=', text , '&tl=', lang].join('');
var audio = new Audio();
audio.addEventListener('play', function() {
}, false);
audio.addEventListener('ended', function() {
justSpoke = true;
}, false);
audio.addEventListener('error', function() {
}, false);
audio.autoplay = true;
audio.src = audioURL;
};
return {
speak: function(text, lang){
speak(text, lang);
},
justSpoke: function(){
return justSpoke;
},
recognised: function(){
justSpoke = false;
}
};
};
});
/**
* @ngdoc object
* @name adaptive.speech.$speechRecognitionProvider
*
* @description
* The `$speechRecognitionProvider` provides an interface to configure `$speechRecognition
* service for runtime.
*/
adaptive.provider('$speechRecognition', function() {
this.DEST_LANG = 'en-US';
this.setLang = function(lang){
this.DEST_LANG = lang;
};
/**
* @ngdoc object
* @name adaptive.speech.$speechRecognition
* @requires $rootScope
*
* @description
* The `$speechRecognition` service is your interface to communicate with underlying
* native speech recognition implementations by the browser. It provides several methods
* to for example paying attention and listening to what the user says, or it can
* react on specific callbacks.
*/
this.$get = ['$rootScope', '$speechSynthetis', '$speechCorrection', function($rootScope, $speechSynthetis, $speechCorrection) {
var DEST_LANG = this.DEST_LANG;
var SpeechRecognitionMock = function(){
this.start = function() { this.onerror({'code': 0, 'error': 'speech recognition is not supported'}); }.bind(this);
this.stop = function() { this.onerror({'code': 0, 'error': 'speech recognition is not supported'}); }.bind(this);
};
window.SpeechRecognition = window.SpeechRecognition || window.webkitSpeechRecognition || SpeechRecognitionMock;
var recognizer;
var init = function(){
recognizer = new window.SpeechRecognition();
recognizer.continuous = true;
recognizer.interimResults = true;
recognizer.maxAlternatives = 3;
recognizer.onresult = function(e) {
if (onresult) {
onresult(e);
}
};
recognizer.onstart = function(e) {
if (onstart) {
onstart(e);
}
};
recognizer.onend = function(e) {
if (onend) {
onend(e);
}
};
recognizer.onerror = function(e) {
if (onerror) {
onerror(e);
}
};
};
init();
var payingAttention = true;
var isListening = false;
/**
* @ngdoc function
* @name adaptive.speech.$speechRecognition#listen
* @methodOf adaptive.speech.$speechRecognition
*
* @description
* Starts the speech recognizer and listens for speech input.
*/
var listen = function(){
if (!isListening) {
init();
recognizer.start();
}
isListening = true;
};
var stopListening = function(){
if (isListening) {
recognizer.stop();
}
isListening = false;
};
var command = function(utterance){
utterance = $speechCorrection.getCorrection(utterance, DEST_LANG);
$rootScope.$emit('adaptive.speech:utterance', {'lang': DEST_LANG, 'utterance': utterance});
};
/**
* @ngdoc function
* @name adaptive.speech.$speechRecognition#setLang
* @methodOf adaptive.speech.$speechRecognition
*
* @description
* Configures speech recognizer to use given language when trying to recognize
* speech input. Default is `en-US`.
*
* @
*/
var setLang = function(lang){
DEST_LANG = lang;
recognizer.lang = lang;
};
var onstart, onerror;
var onend = function(e){
payingAttention = false;
recognizer = null;
};
var onresult = function(e){
if (e.results.length) {
var result = e.results[e.resultIndex];
if (result.isFinal) {
if ($speechSynthetis.justSpoke()) {
$speechSynthetis.recognised();
return false;
}
var utterance = result[0].transcript.trim();
if (payingAttention) {
command(utterance);
}
}
}
};
/**
* @ngdoc function
* @name adaptive.speech.$speechRecognition#listenUtterance
* @methodOf adaptive.speech.$speechRecognition
*
* @description
* With `$speechRecognition.listenUtterance()` you're able to setup several tasks
* for the speech recognizer within your controller. `listenUtterance()` expects a
* task description object, that holds defined tasks. A task needs an identifier,
* a regex for the speech recognizer, as well as the language in which the speech
* recognizer should interpret it.
*
* In addition one has to provide a function that will be called once the speech
* recognizer recognizes the given pattern.
*
* <pre>
* var app = angular.module('myApp', ['adaptive.speech']);
*
* app.controller('Ctrl', function ($speechRecognition) {
*
* $scope.recognition = {};
* $scope.recognition['en-US'] = {
* 'addToList': {
* 'regex': /^to do .+/gi,
* 'lang': 'en-US',
* 'call': function(e){
* $scope.addToList(e);
* }
* },
* 'listTasks': [{
* 'regex': /^complete .+/gi,
* 'lang': 'en-US',
* 'call': function(e){
* $scope.completeTask(e);
* }
* },{
* 'regex': /^remove .+/gi,
* 'lang': 'en-US',
* 'call': function(e){
* $scope.removeTask(e);
* }
* }]
* };
* });
* </pre>
*
* @param {object} tasks Task definition object
*/
var listenUtterance = function(tasks){
return $rootScope.$on('adaptive.speech:utterance', function(e, data){
var utterance = data.utterance;
callCommands(tasks, DEST_LANG, utterance);
});
};
return {
/**
* @ngdoc function
* @name adaptive.speech.$speechRecognition#onstart
* @method adaptive.speech.$speechRecognition
*
* @description
* Exepts a function which gets executed once `$speechRecognition` service
* starts listening to speech input.
*
* <pre>
* var app = angular.module('myApp', ['adaptive.speech']);
*
* app.controller('Ctrl', function ($speechRecognition, $speechSynthetis) {
* $speechRecognition.onstart(function() {
* $speechSynthetis.speak('Yes?, How can I help you?);
* });
* });
* </pre>
*
* @param {object} onstartFn Function callback
*/
onstart: function(fn){
onstart = fn;
},
onerror: function(fn){
onerror = fn;
},
onUtterance: function(cb){
var unbind = $rootScope.$on('adaptive.speech:utterance', function(e, data){
cb(data.utterance);
});
$rootScope.$on('destroy', unbind);
},
setLang: function(lang){
setLang(lang);
},
/**
* @ngdoc function
* @name adaptive.speech.$speechRecognition#getLang
* @methodOf adaptive.speech.$speechRecognition
*
* @description
* Returns configured language that is used by speech recognizer.
*
* @return {string} lang Language key
*/
getLang: function(){
return DEST_LANG;
},
payAttention: function(){
payingAttention = true;
},
ignore: function(){
payingAttention = false;
},
listen: function(){
listen();
},
stopListening: function(){
stopListening();
},
command: function(utterance){
command(utterance);
},
listenUtterance: function(tasks){
return listenUtterance(tasks);
}
};
}];
});
/**
* @ngdoc object
* @name adaptive.speech.directive:speechrecognition
* @requires $rootScope
* @restrict A
*
* @description
* `adaptive.speech` provides an alternative way to define tasks, the speech
* recognizer should listen to, to the `$speechRecognition.listenUtterance()` method.
* All you have to do is to apply the `speechrecognition` directive to any element
* and declare a object literal expression just as you would when using
* `$speechRecognition.listenUtterance()`.
*/
adaptive.directive('speechrecognition', ['$rootScope', '$speechRecognition', function ($rootScope, $speechRecognition) {
return {
restrict: 'A',
link: function (scope, element, attrs) {
var getOptions = function() {
return angular.extend({}, scope.$eval(attrs.speechrecognition));
};
var opts = getOptions();
var unbind = $rootScope.$on('adaptive.speech:utterance', function(e, data){
var DEST_LANG = $speechRecognition.getLang();
var utterance = data.utterance;
callCommands(opts.tasks, DEST_LANG, utterance, opts.reference);
});
element.bind('$destroy', function() {
unbind();
});
}
};
}]);
})();