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Update sw.js
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314
public/sw.js
314
public/sw.js
@@ -1,268 +1,66 @@
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// sw.js (use this as your vite-plugin-pwa worker source)
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// - Tees streaming responses matching TARGET_SUBSTRING
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// - Continuously overwrites "last thread" in localForage backing DB (key=threads_v1)
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// - No importScripts required (uses native IndexedDB)
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// - Exposes debug commands via postMessage: PING, PING_STATUS, TEST_WRITE, READ_KEY, LIST_SW_SAVED
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// defensive IDB write that matches localforage shape and falls back to alternate put form.
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// Assumes openLFDB() returns an open IDB database and STORE_NAME constant exists.
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const TARGET_SUBSTRING = 'openrouter.ai/api/v1/chat/completions'; // adjust if necessary
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const THREADS_KEY = 'threads_v1';
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const SAVE_BYTES_THRESHOLD = 6 * 1024;
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const SAVE_TIME_THRESHOLD = 800;
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const BROADCAST_THROTTLE_MS = 600;
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const DB_NAME = 'localforage';
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const STORE_NAME = 'keyvaluepairs';
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const gid = () => Math.random().toString(36).slice(2,9) + '-' + Date.now().toString(36);
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const now = () => Date.now();
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function openLFDB() {
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return new Promise((resolve, reject) => {
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const req = indexedDB.open(DB_NAME);
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req.onsuccess = (e) => resolve(e.target.result);
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req.onerror = (e) => reject(e.target.error || new Error('open error'));
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});
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async function writeThreadsToLF(threadsArr) {
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const key = THREADS_KEY; // 'threads_v1'
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// 1) sanitize to ensure structured-cloneable data
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let safeValue;
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try {
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safeValue = JSON.parse(JSON.stringify(threadsArr || []));
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} catch (err) {
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// fallback: attempt to shallow-clone minimal info
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safeValue = (threadsArr || []).map(t => ({
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id: t && t.id,
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title: t && t.title,
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updatedAt: t && t.updatedAt,
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messages: Array.isArray(t && t.messages) ? t.messages.map(m => ({ id: m.id, role: m.role, content: String(m.content || '') })) : []
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}));
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}
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async function idbGetRaw(key) {
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const db = await openLFDB();
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const tx = db.transaction(STORE_NAME, 'readonly');
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const store = tx.objectStore(STORE_NAME);
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return await new Promise((res, rej) => {
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const r = store.get(key);
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r.onsuccess = ev => res(ev.target.result);
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r.onerror = ev => rej(ev.target.error || new Error('get error'));
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});
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}
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async function idbPutRaw(key, value) {
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const db = await openLFDB();
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const db = await openLFDB(); // your existing helper
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const tx = db.transaction(STORE_NAME, 'readwrite');
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const store = tx.objectStore(STORE_NAME);
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return await new Promise((res, rej) => {
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const r = store.put({ key, value });
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r.onsuccess = () => res(true);
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r.onerror = ev => rej(ev.target.error || new Error('put error'));
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// Try the localforage-native format first: object with `key` and `value`
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try {
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await new Promise((resolve, reject) => {
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const req = store.put({ key, value: safeValue });
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req.onsuccess = () => resolve(true);
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req.onerror = (e) => reject(e.target?.error || new Error('put(key,value) failed'));
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});
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}
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async function idbGetThreads() {
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const rec = await idbGetRaw(THREADS_KEY).catch(err => { throw err; });
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if (!rec) return [];
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return Array.isArray(rec.value) ? rec.value : [];
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}
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async function idbWriteThreads(arr) {
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await idbPutRaw(THREADS_KEY, arr);
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}
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function pickLastThread(threads) {
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if (!threads || threads.length === 0) return null;
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const sorted = [...threads].sort((a,b) => (b.updatedAt||0) - (a.updatedAt||0));
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return sorted[0];
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}
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function upsertAssistantInThreadObj(threadObj, streamId, text) {
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threadObj.updatedAt = now();
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for (let i = threadObj.messages.length - 1; i >= 0; i--) {
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const m = threadObj.messages[i];
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if (m && m.sw_streamId === streamId) {
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m.content = text;
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m.contentParts = [{ type:'text', text }];
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m.updatedAt = now();
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m._sw_savedAt = now();
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return threadObj;
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}
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}
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const msg = {
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id: 'swmsg-' + gid(),
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role: 'assistant',
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content: text,
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contentParts: [{ type:'text', text }],
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kind: 'assistant',
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sw_saved: true,
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sw_streamId: streamId,
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createdAt: now(),
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updatedAt: now(),
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_sw_savedAt: now()
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};
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threadObj.messages.push(msg);
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return threadObj;
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}
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async function safeFlushLastThread(streamId, accumulated, meta = {}) {
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const threads = await idbGetThreads();
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let thread = pickLastThread(threads);
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const ts = now();
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if (!thread) {
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thread = { id: 'sw-thread-' + gid(), title: 'Missed while backgrounded', pinned:false, updatedAt: ts, messages: [] };
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threads.unshift(thread);
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}
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upsertAssistantInThreadObj(thread, streamId, accumulated);
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await idbWriteThreads(threads);
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return { ok:true, threadId: thread.id };
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}
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async function broadcast(msg) {
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// success
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await tx.complete?.catch(()=>{}).catch(()=>{}); // noop if not present
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return { ok: true, method: 'put({key,value})' };
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} catch (err1) {
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// fallback: try objectStore.put(value, key)
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try {
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const cl = await self.clients.matchAll({ includeUncontrolled: true, type: 'window' });
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for (const c of cl) {
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try { c.postMessage(msg); } catch(_) {}
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}
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} catch(_) {}
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}
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/* lifecycle */
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self.addEventListener('install', ev => self.skipWaiting());
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self.addEventListener('activate', ev => ev.waitUntil(self.clients.claim()));
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/* fetch handler: tee + continuous overwrite */
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self.addEventListener('fetch', event => {
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try {
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const url = String(event.request.url || '');
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if (!url.includes(TARGET_SUBSTRING)) return;
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event.respondWith((async () => {
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const upstream = await fetch(event.request);
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if (!upstream || !upstream.body) return upstream;
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const streamId = 'sw-' + gid();
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const meta = { url, startedAt: now(), bytes: 0, status: 'started' };
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broadcast({ type: 'sw-intercept-start', streamId, meta });
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const [clientStream, swStream] = upstream.body.tee();
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const savePromise = (async () => {
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const reader = swStream.getReader();
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const decoder = new TextDecoder('utf-8');
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let accumulated = '';
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let sinceSaveBytes = 0;
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let lastSaveAt = 0;
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let lastBroadcastAt = 0;
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async function maybeFlush(force=false) {
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try {
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const nowMs = now();
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if (!force && sinceSaveBytes < SAVE_BYTES_THRESHOLD && (nowMs - lastSaveAt) < SAVE_TIME_THRESHOLD) return;
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await safeFlushLastThread(streamId, accumulated, { bytes: meta.bytes });
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sinceSaveBytes = 0;
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lastSaveAt = nowMs;
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if (nowMs - lastBroadcastAt > BROADCAST_THROTTLE_MS) {
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lastBroadcastAt = nowMs;
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broadcast({ type: 'sw-intercept-progress', streamId, meta: { bytes: meta.bytes, savedAt: lastSaveAt, snippet: accumulated.slice(-1024) }});
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}
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} catch (err) {
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broadcast({ type: 'sw-intercept-error', streamId, meta: { error: String(err && err.message ? err.message : err) }});
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}
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}
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try {
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while (true) {
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const { value, done } = await reader.read();
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if (done) break;
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let chunk = '';
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try { chunk = decoder.decode(value, { stream: true }); } catch (e) { chunk = ''; }
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accumulated += chunk;
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const bytes = value ? (value.byteLength || 0) : chunk.length;
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meta.bytes += bytes;
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sinceSaveBytes += bytes;
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await maybeFlush(false);
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}
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await maybeFlush(true);
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meta.status = 'finished';
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meta.endedAt = now();
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broadcast({ type: 'sw-intercept-end', streamId, meta: { totalBytes: meta.bytes, endedAt: meta.endedAt }});
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} catch (err) {
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meta.status = 'error';
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meta.error = String(err && err.message ? err.message : err);
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broadcast({ type: 'sw-intercept-error', streamId, meta: { error: meta.error }});
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}
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})();
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event.waitUntil(savePromise);
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return new Response(clientStream, { status: upstream.status, statusText: upstream.statusText, headers: upstream.headers });
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})());
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} catch (err) {
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broadcast({ type: 'sw-debug', text: 'fetch handler error: ' + String(err && err.message ? err.message : err) });
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}
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// create a fresh transaction (previous tx is probably aborted)
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const tx2 = db.transaction(STORE_NAME, 'readwrite');
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const store2 = tx2.objectStore(STORE_NAME);
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await new Promise((resolve, reject) => {
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const req = store2.put(safeValue, key);
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req.onsuccess = () => resolve(true);
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req.onerror = (e) => reject(e.target?.error || new Error('put(value, key) failed'));
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});
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/* messages: PING, PING_STATUS, TEST_WRITE, READ_KEY, LIST_SW_SAVED */
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self.addEventListener('message', (event) => {
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const data = event.data || {};
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(async () => {
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await tx2.complete?.catch(()=>{}).catch(()=>{});
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return { ok: true, method: 'put(value, key)' };
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} catch (err2) {
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// final fallback: store stringified JSON (always cloneable)
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try {
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if (data.type === 'PING') {
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if (event.ports && event.ports[0]) event.ports[0].postMessage({ type:'PONG', ts: now(), ok:true });
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else broadcast({ type:'PONG', ts: now(), ok:true });
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return;
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}
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if (data.type === 'PING_STATUS') {
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const reply = { type:'PONG_STATUS', ts: now() };
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if (event.ports && event.ports[0]) event.ports[0].postMessage(reply);
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else broadcast(reply);
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return;
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}
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if (data.type === 'TEST_WRITE') {
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try {
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const threads = await idbGetThreads();
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const tid = 'sw-test-' + gid();
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const nowMs = now();
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const testThread = { id: tid, title: 'SW test ' + new Date(nowMs).toISOString(), pinned:false, updatedAt: nowMs, messages: [ { id:'swtest-'+gid(),role:'assistant',content:'sw test write @'+new Date(nowMs).toISOString(), contentParts:[{type:'text',text:'sw test write'}], createdAt: nowMs, updatedAt: nowMs } ]};
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threads.unshift(testThread);
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await idbWriteThreads(threads);
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const res = { type:'TEST_WRITE_RESULT', ok:true, tid };
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if (event.ports && event.ports[0]) event.ports[0].postMessage(res);
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else broadcast(res);
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} catch (err) {
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const res = { type:'TEST_WRITE_RESULT', ok:false, error: String(err && err.message ? err.message : err) };
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if (event.ports && event.ports[0]) event.ports[0].postMessage(res);
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else broadcast(res);
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}
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return;
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}
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if (data.type === 'READ_KEY') {
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const key = data.key || THREADS_KEY;
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try {
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const rec = await idbGetRaw(key);
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const val = rec ? rec.value : null;
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const res = { type:'READ_KEY_RESULT', ok:true, key, value: val };
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if (event.ports && event.ports[0]) event.ports[0].postMessage(res);
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else broadcast(res);
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} catch (err) {
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const res = { type:'READ_KEY_RESULT', ok:false, key, error: String(err && err.message ? err.message : err) };
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if (event.ports && event.ports[0]) event.ports[0].postMessage(res);
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else broadcast(res);
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}
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return;
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}
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if (data.type === 'LIST_SW_SAVED') {
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try {
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const threads = await idbGetThreads();
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const found = [];
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for (const t of (threads||[])) {
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for (const m of (t.messages||[])) {
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if (m && m.sw_streamId) found.push({ threadId: t.id, messageId: m.id, sw_streamId: m.sw_streamId, snippet: (m.content||'').slice(0,200) });
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}
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}
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const res = { type:'LIST_SW_SAVED_RESULT', ok:true, found };
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if (event.ports && event.ports[0]) event.ports[0].postMessage(res);
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else broadcast(res);
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} catch (err) {
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const res = { type:'LIST_SW_SAVED_RESULT', ok:false, error: String(err && err.message ? err.message : err) };
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if (event.ports && event.ports[0]) event.ports[0].postMessage(res);
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else broadcast(res);
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}
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return;
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}
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} catch (err) {
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const r = { type:'SW_ERROR', error: String(err && err.message ? err.message : err) };
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if (event.ports && event.ports[0]) event.ports[0].postMessage(r);
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else broadcast(r);
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}
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})();
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const tx3 = db.transaction(STORE_NAME, 'readwrite');
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const store3 = tx3.objectStore(STORE_NAME);
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await new Promise((resolve, reject) => {
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const req = store3.put({ key, value: JSON.stringify(safeValue) });
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req.onsuccess = () => resolve(true);
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req.onerror = (e) => reject(e.target?.error || new Error('put string fallback failed'));
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});
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await tx3.complete?.catch(()=>{}).catch(()=>{});
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return { ok: true, method: 'put({key, value: JSON.stringify(...)})', note: 'value stored as JSON string' };
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} catch (err3) {
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// give up and return the most informative error
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const msg = 'writeThreadsToLF failed: ' + (err3?.message || err2?.message || err1?.message || String(err1));
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throw new Error(msg);
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}
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}
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}
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}
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