web-speech-profanity/packages/component/src/SpeechServices/SpeechToText/cognitiveServiceEventResultToWebSpeechRecognitionResultList.js

Web Speech API adapter to use Cognitive Services Speech Services for both speech-to-text and text-to-speech service.

import arrayToMap from '../../Util/arrayToMap';
import SpeechSDK from '../SpeechSDK';

const {
  ResultReason: { RecognizingSpeech, RecognizedSpeech }
} = SpeechSDK;

export default function(result, { maxAlternatives = Infinity, textNormalization = 'display' } = {}) {
  if (result.reason === RecognizingSpeech || (result.reason === RecognizedSpeech && !result.json.NBest)) {
    const resultList = [
      {
        confidence: 0.5,
        transcript: result.text
      }
    ];

    if (result.reason === RecognizedSpeech) {
      resultList.isFinal = true;
    }

    return resultList;
  } else if (result.reason === RecognizedSpeech) {
    const resultList = arrayToMap(
      (result.json.NBest || [])
        .slice(0, maxAlternatives)
        .map(({ Confidence: confidence, Display: display, ITN: itn, Lexical: lexical, MaskedITN: maskedITN }) => ({
          confidence,
          transcript:
            textNormalization === 'itn'
              ? itn
              : textNormalization === 'lexical'
              ? lexical
              : textNormalization === 'maskeditn'
              ? maskedITN
              : display
        })),
      { isFinal: true }
    );

    return resultList;
  }

  return [];
}