tsbase/Utility/Speech/SpeechRecognizer.js

Base class libraries for TypeScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.SpeechRecognizer = void 0;
const Strings_1 = require("../../System/Strings");
const ISpeechRecognition_1 = require("./ISpeechRecognition");
class SpeechRecognizer {
    constructor(speechRecognition = window && window.webkitSpeechRecognition ?
        new window.webkitSpeechRecognition() : null) {
        if (!speechRecognition) {
            throw new Error('No speech recognition service is available.');
        }
        else {
            this.speechRecognition = speechRecognition;
        }
        this.speechRecognition.continuous = false;
        this.speechRecognition.interimResults = false;
    }
    async Listen() {
        return new Promise((resolve) => {
            let result = Strings_1.Strings.Empty;
            const resultEvent = (e) => { result = Array.from(e.results)[0][0].transcript; };
            const endEvent = () => {
                this.speechRecognition.removeEventListener(ISpeechRecognition_1.SpeechRecognitionEvents.Result, resultEvent);
                this.speechRecognition.removeEventListener(ISpeechRecognition_1.SpeechRecognitionEvents.End, endEvent);
                resolve(result);
            };
            this.speechRecognition.addEventListener(ISpeechRecognition_1.SpeechRecognitionEvents.Result, resultEvent);
            this.speechRecognition.addEventListener(ISpeechRecognition_1.SpeechRecognitionEvents.End, endEvent);
            this.speechRecognition.start();
        });
    }
    async HandleSpeechCommands(commands, until) {
        do {
            const transcript = await this.Listen();
            const command = commands.find(c => c.Condition(transcript));
            await (command === null || command === void 0 ? void 0 : command.Action());
        } while (!until());
    }
}
exports.SpeechRecognizer = SpeechRecognizer;
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