Voice Capture for Sawtooth

Please add https://api.voicecapture.ai to the Content Security Policy
of our Discover surveys:

  script-src   https://api.voicecapture.ai
  connect-src  https://api.voicecapture.ai

// Voice Capture — paste into Settings > Custom JavaScript
(function () {
  var PROJECT_KEY = 'proj_XXXXXXXX';
  // names of the open-ended questions that get voice
  var QUESTIONS = ['Q2'];

  // One key per respondent for the whole survey. getRecordID (capital "ID")
  // is Discover's own; the generated key is the fallback.
  function respondentKey() {
    try {
      if (typeof getRecordID === 'function') {
        var rid = getRecordID();
        if (rid) return String(rid);
      }
    } catch (e) { /* fall back to a generated key */ }
    var fresh = 'sd_' + Date.now() + '_' +
      Math.random().toString(36).slice(2, 10);
    try {
      var stored = window.sessionStorage.getItem('gv_sid');
      if (stored) return stored;
      window.sessionStorage.setItem('gv_sid', fresh);
    } catch (e) { /* storage blocked: per-page key */ }
    return fresh;
  }

  var waiting = [];
  function withLibrary(cb) {
    if (window.GeniusVoice && window.GeniusVoice.init) return cb();
    waiting.push(cb);
    if (document.getElementById('gv-lib')) return;
    var s = document.createElement('script');
    s.id = 'gv-lib';
    // the only host Discover's CSP allows
    s.src = 'https://api.voicecapture.ai/voice.js';
    s.onload = function () {
      var q = waiting;
      waiting = [];
      q.forEach(function (f) { f(); });
    };
    document.body.appendChild(s);
  }

  // Discover sends the respondent to an error page if custom code throws.
  function mount(name, el) {
    try {
      var root = el || document;
      if (root.querySelector('[data-gv-host]')) return;
      var field = root.querySelector('textarea') ||
        root.querySelector('input[type="text"]');
      if (!field) {
        console.warn('[VoiceCapture] no text box in', name);
        return;
      }
      if (!field.id) field.id = 'gv-field-' + name;

      var sessionId = respondentKey();
      var host = document.createElement('div');
      host.setAttribute('data-gv-host', name);
      host.setAttribute('data-project', PROJECT_KEY);
      host.setAttribute('data-target', '#' + field.id);
      host.setAttribute('data-session', sessionId);
      host.setAttribute('data-question', name);
      host.setAttribute('data-lang', 'es');
      field.parentNode.insertBefore(host, field);

      withLibrary(function () {
        try {
          window.GeniusVoice.init(host);
        } catch (e) {
          console.warn('[VoiceCapture]', e);
        }
      });
    } catch (e) {
      console.warn('[VoiceCapture]', e);
    }
  }

  if (typeof addOnQuestionLoadHandler !== 'function') {
    console.warn('[VoiceCapture] addOnQuestionLoadHandler is not available');
    return;
  }
  QUESTIONS.forEach(function (name) {
    try {
      addOnQuestionLoadHandler(name, function (el) { mount(name, el); });
    } catch (e) {
      console.warn('[VoiceCapture] could not watch question', name, e);
    }
  });
})();