367 lines
15 KiB
JavaScript
367 lines
15 KiB
JavaScript
const DB_NAME = 'faerro-kb-local';
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const STORE_NAME = 'recordings';
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const MAX_RECORDING_MS = 30 * 60 * 1000;
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const elements = Object.fromEntries([
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'record-button', 'record-title', 'record-help', 'record-time', 'record-meter-fill', 'audio-level', 'audio-level-fill', 'capture-message',
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'queue-list', 'queue-empty', 'queue-count', 'sync-button', 'archive-list', 'archive-empty',
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'network-state', 'storage-status',
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].map((id) => [id, document.getElementById(id)]));
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let databasePromise;
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let mediaRecorder;
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let activeStream;
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let audioContext;
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let audioLevelFrame;
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let recordingChunks = [];
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let recordingStartedAt = 0;
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let recordingTimer;
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let syncing = false;
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function openDatabase() {
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if (databasePromise) return databasePromise;
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databasePromise = new Promise((resolve, reject) => {
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const request = indexedDB.open(DB_NAME, 1);
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request.onupgradeneeded = () => request.result.createObjectStore(STORE_NAME, { keyPath: 'id' });
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request.onsuccess = () => resolve(request.result);
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request.onerror = () => reject(request.error);
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});
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return databasePromise;
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}
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async function queueTransaction(mode, operation) {
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const db = await openDatabase();
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return new Promise((resolve, reject) => {
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const transaction = db.transaction(STORE_NAME, mode);
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const store = transaction.objectStore(STORE_NAME);
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const request = operation(store);
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transaction.oncomplete = () => resolve(request?.result);
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transaction.onerror = () => reject(transaction.error);
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transaction.onabort = () => reject(transaction.error);
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});
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}
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const getQueued = () => queueTransaction('readonly', (store) => store.getAll());
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const putQueued = (recording) => queueTransaction('readwrite', (store) => store.put(recording));
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const deleteQueued = (id) => queueTransaction('readwrite', (store) => store.delete(id));
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function setMessage(message, isError = false) {
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elements['capture-message'].textContent = message;
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elements['capture-message'].style.color = isError ? 'var(--coral)' : '';
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}
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function updateNetwork() {
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const online = navigator.onLine;
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elements['network-state'].classList.toggle('online', online);
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elements['network-state'].innerHTML = `<i></i>${online ? 'Connected' : 'Offline'}`;
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elements['storage-status'].textContent = online ? 'Pending audio stays here until server confirmation.' : 'Offline: new audio is saved on this device.';
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}
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function formatDuration(milliseconds) {
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const seconds = Math.floor(milliseconds / 1000);
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return `${String(Math.floor(seconds / 60)).padStart(2, '0')}:${String(seconds % 60).padStart(2, '0')}`;
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}
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function preferredMimeType() {
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return ['audio/mp4', 'audio/webm;codecs=opus', 'audio/webm', 'audio/ogg;codecs=opus']
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.find((type) => window.MediaRecorder?.isTypeSupported(type));
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}
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function prepareAudioLevelMeter() {
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const AudioContextClass = window.AudioContext || window.webkitAudioContext;
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if (!AudioContextClass) return;
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try {
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audioContext = new AudioContextClass();
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audioContext.resume().catch(() => {});
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} catch {
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audioContext = undefined;
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}
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}
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function startAudioLevelMeter(stream) {
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if (!audioContext) return;
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try {
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const analyser = audioContext.createAnalyser();
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analyser.fftSize = 512;
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audioContext.createMediaStreamSource(stream).connect(analyser);
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const samples = new Uint8Array(analyser.fftSize);
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elements['audio-level'].hidden = false;
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const updateLevel = () => {
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analyser.getByteTimeDomainData(samples);
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const sumSquares = samples.reduce((sum, sample) => sum + (sample - 128) ** 2, 0);
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const level = Math.min(100, Math.round(Math.sqrt(sumSquares / samples.length) / 32 * 100));
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elements['audio-level-fill'].style.width = `${level}%`;
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elements['audio-level'].setAttribute('aria-valuenow', level);
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audioLevelFrame = requestAnimationFrame(updateLevel);
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};
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audioLevelFrame = requestAnimationFrame(updateLevel);
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} catch {
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audioContext?.close().catch(() => {});
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audioContext = undefined;
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}
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}
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function stopAudioLevelMeter() {
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cancelAnimationFrame(audioLevelFrame);
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audioLevelFrame = undefined;
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if (audioContext) {
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audioContext.close().catch(() => {});
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audioContext = undefined;
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}
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elements['audio-level'].hidden = true;
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elements['audio-level-fill'].style.width = '0';
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elements['audio-level'].setAttribute('aria-valuenow', '0');
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}
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async function startRecording() {
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if (!navigator.mediaDevices?.getUserMedia || !window.MediaRecorder) {
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setMessage('This browser cannot record audio. Open the app in current iOS Safari.', true);
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return;
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}
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try {
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prepareAudioLevelMeter();
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activeStream = await navigator.mediaDevices.getUserMedia({ audio: true });
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const mimeType = preferredMimeType();
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mediaRecorder = new MediaRecorder(activeStream, mimeType ? { mimeType } : undefined);
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recordingChunks = [];
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mediaRecorder.ondataavailable = (event) => { if (event.data.size) recordingChunks.push(event.data); };
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mediaRecorder.onstop = saveRecording;
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mediaRecorder.start(1000);
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startAudioLevelMeter(activeStream);
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recordingStartedAt = Date.now();
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elements['record-button'].classList.add('recording');
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elements['record-button'].setAttribute('aria-label', 'Stop recording');
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elements['record-title'].textContent = 'Recording in progress';
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elements['record-help'].textContent = 'Tap the square to finish and save';
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setMessage('Audio is being recorded on this device.');
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recordingTimer = window.setInterval(() => {
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const elapsed = Date.now() - recordingStartedAt;
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elements['record-time'].textContent = formatDuration(elapsed);
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elements['record-meter-fill'].style.width = `${Math.min(100, elapsed / MAX_RECORDING_MS * 100)}%`;
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if (elapsed >= MAX_RECORDING_MS) stopRecording();
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}, 250);
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} catch (error) {
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stopAudioLevelMeter();
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activeStream?.getTracks().forEach((track) => track.stop());
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activeStream = undefined;
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setMessage(error.name === 'NotAllowedError' ? 'Microphone access was denied.' : 'Could not start microphone recording.', true);
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}
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}
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function stopRecording() {
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if (mediaRecorder?.state === 'recording') mediaRecorder.stop();
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stopAudioLevelMeter();
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activeStream?.getTracks().forEach((track) => track.stop());
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activeStream = undefined;
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clearInterval(recordingTimer);
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elements['record-button'].classList.remove('recording');
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elements['record-button'].setAttribute('aria-label', 'Start recording');
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elements['record-title'].textContent = 'Recording saved';
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elements['record-help'].textContent = 'Adding it to the upload queue';
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elements['record-time'].textContent = '00:00';
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elements['record-meter-fill'].style.width = '0';
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}
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async function saveRecording() {
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const blob = new Blob(recordingChunks, { type: mediaRecorder.mimeType || 'audio/mp4' });
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if (!blob.size) {
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setMessage('No audio was captured. Please try again.', true);
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return;
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}
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const extension = blob.type.includes('webm') ? 'webm' : blob.type.includes('ogg') ? 'ogg' : 'm4a';
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const createdAt = new Date(recordingStartedAt).toISOString();
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const recording = {
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id: crypto.randomUUID(),
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blob,
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createdAt,
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filename: `voice-note-${createdAt.replaceAll(':', '-')}.${extension}`,
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durationMs: Date.now() - recordingStartedAt,
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createdAtMs: recordingStartedAt,
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};
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try {
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await putQueued(recording);
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setMessage(navigator.onLine ? 'Saved on device. Uploading now…' : 'Saved on device. It will upload when you reconnect.');
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await renderQueue();
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await syncQueue();
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} catch {
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setMessage('Could not save this recording in browser storage. Keep this page open and try again.', true);
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}
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}
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async function syncQueue() {
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if (syncing || !navigator.onLine) return;
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syncing = true;
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elements['sync-button'].disabled = true;
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elements['queue-list'].querySelectorAll('.delete-note').forEach((button) => { button.disabled = true; });
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try {
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const recordings = await getQueued();
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for (const recording of recordings.sort((a, b) => a.createdAtMs - b.createdAtMs)) {
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const form = new FormData();
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form.append('recording_id', recording.id);
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form.append('audio', recording.blob, recording.filename);
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form.append('created_at', recording.createdAt);
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try {
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const response = await fetch('/api/notes', { method: 'POST', body: form });
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if (!response.ok) throw new Error(`Upload failed: ${response.status}`);
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await deleteQueued(recording.id);
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setMessage('Server confirmed the recording is stored.');
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} catch {
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setMessage('Upload paused. Your recording is still saved on this device.');
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break;
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}
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}
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} finally {
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syncing = false;
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elements['sync-button'].disabled = false;
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await renderQueue();
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await loadAwaitingNotes();
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}
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}
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function prettyDate(value) {
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return new Intl.DateTimeFormat(undefined, { dateStyle: 'medium', timeStyle: 'short' }).format(new Date(value));
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}
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async function renderQueue() {
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const recordings = (await getQueued()).sort((a, b) => b.createdAtMs - a.createdAtMs);
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elements['queue-list'].replaceChildren();
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elements['queue-count'].textContent = recordings.length;
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elements['queue-empty'].hidden = recordings.length > 0;
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for (const recording of recordings) {
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const item = document.createElement('li');
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item.className = 'queue-item';
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const icon = document.createElement('span');
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icon.className = 'queue-icon';
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icon.textContent = '◖';
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const body = document.createElement('div');
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body.className = 'item-body';
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const top = document.createElement('div');
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top.className = 'item-top';
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const name = document.createElement('span');
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name.className = 'item-name';
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name.textContent = recording.filename;
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const status = document.createElement('span');
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status.className = 'item-status';
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status.textContent = navigator.onLine ? 'WAITING TO SYNC' : 'SAVED OFFLINE';
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const meta = document.createElement('div');
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meta.className = 'item-meta';
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meta.textContent = `${prettyDate(recording.createdAt)} · ${formatDuration(recording.durationMs)}`;
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const remove = createDeleteButton(`Delete queued note ${recording.filename}`);
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remove.disabled = syncing;
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remove.addEventListener('click', async () => {
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if (syncing) return;
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remove.disabled = true;
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try {
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await deleteQueued(recording.id);
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await renderQueue();
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} catch {
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setMessage('Could not remove the queued recording.', true);
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remove.disabled = false;
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}
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});
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top.append(name, status);
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body.append(top, meta);
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item.append(icon, body, remove);
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elements['queue-list'].append(item);
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}
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}
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function createDeleteButton(label) {
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const button = document.createElement('button');
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button.className = 'delete-note';
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button.type = 'button';
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button.textContent = '×';
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button.title = label;
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button.setAttribute('aria-label', label);
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return button;
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}
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function renderArchive(notes) {
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elements['archive-list'].replaceChildren();
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elements['archive-empty'].hidden = notes.length > 0;
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if (!navigator.onLine) elements['archive-empty'].textContent = 'Reconnect to view notes awaiting transcription.';
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else elements['archive-empty'].textContent = 'No notes awaiting transcription.';
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for (const note of notes) {
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const item = document.createElement('article');
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item.className = 'archive-item';
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const date = document.createElement('time');
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date.className = 'archive-date';
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date.textContent = prettyDate(note.created_at);
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const body = document.createElement('div');
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body.className = 'item-body';
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const name = document.createElement('div');
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name.className = 'item-name';
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name.textContent = note.filename;
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const transcript = document.createElement('textarea');
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transcript.className = 'archive-transcript';
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transcript.placeholder = note.status === 'transcribing' ? 'Transcription in progress…' : 'Transcript not available yet. Add or correct it here.';
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transcript.value = note.transcript;
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transcript.setAttribute('aria-label', `Transcript for ${note.filename}`);
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const save = document.createElement('button');
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save.className = 'save-transcript';
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save.type = 'button';
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save.textContent = 'SAVE TRANSCRIPT';
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save.addEventListener('click', async () => {
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save.disabled = true;
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try {
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const response = await fetch(`/api/notes/${encodeURIComponent(note.id)}/transcript`, {
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method: 'PUT', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ transcript: transcript.value }),
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});
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if (!response.ok) throw new Error('Save failed');
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await loadAwaitingNotes();
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} catch {
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save.textContent = 'RETRY SAVE';
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} finally {
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save.disabled = false;
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}
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});
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const status = document.createElement('div');
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status.className = 'archive-status';
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status.textContent = 'AWAITING TRANSCRIPTION';
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const remove = createDeleteButton(`Delete note ${note.filename}`);
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remove.addEventListener('click', async () => {
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remove.disabled = true;
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try {
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const response = await fetch(`/api/notes/${encodeURIComponent(note.id)}`, { method: 'DELETE' });
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if (!response.ok) throw new Error('Delete failed');
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await loadAwaitingNotes();
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} catch {
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remove.disabled = false;
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setMessage('Could not delete this note. Please try again.', true);
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}
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});
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body.append(name, transcript, save, status);
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item.append(date, body, remove);
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elements['archive-list'].append(item);
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}
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}
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async function loadAwaitingNotes() {
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if (!navigator.onLine) {
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renderArchive([]);
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return;
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}
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try {
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const response = await fetch('/api/notes?status=awaiting_transcription');
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if (!response.ok) throw new Error('Archive unavailable');
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renderArchive(await response.json());
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} catch {
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elements['archive-list'].replaceChildren();
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elements['archive-empty'].hidden = false;
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elements['archive-empty'].textContent = 'Could not reach the archive. Pending recordings remain on this device.';
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}
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}
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elements['record-button'].addEventListener('click', () => mediaRecorder?.state === 'recording' ? stopRecording() : startRecording());
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elements['sync-button'].addEventListener('click', syncQueue);
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window.addEventListener('online', () => { updateNetwork(); syncQueue(); loadAwaitingNotes(); });
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window.addEventListener('offline', updateNetwork);
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window.addEventListener('focus', () => { updateNetwork(); syncQueue(); loadAwaitingNotes(); });
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document.addEventListener('visibilitychange', () => { if (document.visibilityState === 'visible') syncQueue(); });
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updateNetwork();
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renderQueue().then(syncQueue).catch(() => setMessage('Browser storage is unavailable. Check Safari storage settings.', true));
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loadAwaitingNotes();
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if ('serviceWorker' in navigator) navigator.serviceWorker.register('/sw.js').catch(() => {}); |