pediatric-ai-scribe-v3/public/js/transcriptionSettings.js

// ============================================================
// TRANSCRIPTION SETTINGS — Browser Whisper + Web Speech API
// ============================================================

(function() {
  var _inited = false;

  document.addEventListener('tabChanged', function(e) {
    if (e.detail.tab !== 'settings' || _inited) return;
    _inited = true;
    initTranscriptionSettings();
  });

  // Also init on direct page load
  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', function() {
      setTimeout(function() {
        if (!_inited && document.getElementById('browser-whisper-enabled')) {
          _inited = true;
          initTranscriptionSettings();
        }
      }, 500);
    });
  } else {
    setTimeout(function() {
      if (!_inited && document.getElementById('browser-whisper-enabled')) {
        _inited = true;
        initTranscriptionSettings();
      }
    }, 500);
  }

  function initTranscriptionSettings() {
    console.log('[TranscriptionSettings] Initializing...');

    // ── Browser Whisper ──────────────────────────────────────
    var whisperCheckbox = document.getElementById('browser-whisper-enabled');
    var whisperStatus = document.getElementById('browser-whisper-status');
    var whisperModel = document.getElementById('browser-whisper-model');
    var whisperPreload = document.getElementById('btn-whisper-preload');
    var whisperProgress = document.getElementById('browser-whisper-progress');
    var whisperProgressText = document.getElementById('browser-whisper-progress-text');

    if (whisperCheckbox && window.BrowserWhisper) {
      whisperCheckbox.checked = BrowserWhisper.isEnabled();
      whisperStatus.textContent = BrowserWhisper.isEnabled() ? 'On — audio stays on device' : 'Off';

      if (whisperModel) {
        whisperModel.value = BrowserWhisper.getModel();
      }

      whisperCheckbox.addEventListener('change', function() {
        BrowserWhisper.setEnabled(whisperCheckbox.checked);
        whisperStatus.textContent = whisperCheckbox.checked ? 'On — audio stays on device' : 'Off';

        if (whisperCheckbox.checked) {
          // Auto-preload on enable
          BrowserWhisper.preload(function(file, pct) {
            if (whisperProgress && whisperProgressText) {
              if (pct >= 100) {
                whisperProgress.style.display = 'none';
                return;
              }
              whisperProgress.style.display = 'block';
              whisperProgressText.textContent = file + (pct > 0 ? ' ' + pct + '%' : '');
            }
          });
        }
      });

      if (whisperModel) {
        whisperModel.addEventListener('change', function() {
          BrowserWhisper.setModel(whisperModel.value);
        });
      }

      if (whisperPreload) {
        whisperPreload.addEventListener('click', function() {
          if (!BrowserWhisper || !BrowserWhisper.isSupported()) {
            showToast('Browser Whisper not supported', 'error');
            return;
          }

          whisperPreload.disabled = true;
          whisperPreload.innerHTML = '<i class="fas fa-spinner fa-spin"></i> Downloading...';
          whisperProgress.style.display = 'block';
          whisperProgressText.textContent = 'Initializing...';

          BrowserWhisper.setEnabled(true);
          whisperCheckbox.checked = true;
          whisperStatus.textContent = 'On — audio stays on device';

          BrowserWhisper.preload(function(file, pct) {
            if (pct >= 100) {
              whisperProgress.style.display = 'none';
              whisperPreload.disabled = false;
              whisperPreload.innerHTML = '<i class="fas fa-download"></i> Pre-download model';
              showToast('Whisper model ready!', 'success');
              return;
            }
            whisperProgress.style.display = 'block';
            whisperProgressText.textContent = file + (pct > 0 ? ' ' + pct + '%' : '');
          });
        });
      }
    }

    // ── Web Speech Recognition ───────────────────────────────
    var speechCheckbox = document.getElementById('web-speech-enabled');
    var speechStatus = document.getElementById('web-speech-status');
    var speechBrowserInfo = document.getElementById('web-speech-browser-info');

    if (speechCheckbox && window.WebSpeechRecognition) {
      speechCheckbox.checked = WebSpeechRecognition.isEnabled();
      speechStatus.textContent = WebSpeechRecognition.isEnabled() ? 'On — real-time streaming' : 'Off';

      // Show privacy info
      if (speechBrowserInfo) {
        var privacyInfo = WebSpeechRecognition.getPrivacyInfo();
        speechBrowserInfo.innerHTML =
          '<strong>Provider:</strong> ' + privacyInfo.provider + '<br>' +
          '<strong>Privacy:</strong> ' + privacyInfo.privacy + '<br>' +
          '<strong style="color:var(--orange);">⚠️ ' + privacyInfo.warning + '</strong>';
      }

      speechCheckbox.addEventListener('change', function() {
        if (speechCheckbox.checked) {
          // Show confirmation for privacy warning
          showConfirm(
            'WARNING: Real-time streaming uses your browser\'s speech recognition, ' +
            'which may send audio to cloud servers (e.g., Google). ' +
            'This is NOT HIPAA-compliant. ' +
            'Only enable if you understand and accept this privacy trade-off.',
            function() {
              // Disable Browser Whisper if enabling Web Speech
              if (whisperCheckbox && whisperCheckbox.checked) {
                whisperCheckbox.checked = false;
                BrowserWhisper.setEnabled(false);
                whisperStatus.textContent = 'Off';
                showToast('Browser Whisper disabled (Web Speech takes priority)', 'info');
              }
              WebSpeechRecognition.setEnabled(true);
              speechStatus.textContent = 'On — real-time streaming';
            },
            { danger: true, confirmText: 'Enable' }
          );
          // Revert checkbox until confirmed
          speechCheckbox.checked = false;
          return;
        }

        WebSpeechRecognition.setEnabled(false);
        speechStatus.textContent = 'Off';
      });

      // If not supported, disable and show message
      if (!WebSpeechRecognition.isSupported()) {
        speechCheckbox.disabled = true;
        speechStatus.textContent = 'Not supported in this browser';
        if (speechBrowserInfo) {
          speechBrowserInfo.innerHTML = '<strong style="color:var(--red);">Not supported</strong> - Web Speech API not available in this browser.';
        }
      }
    }

    console.log('✅ Transcription settings initialized');
  }

})();