Videos grid: a tile without a still of its own shows the server's (vmedia thumb.jpg) at once — about a second the first time anyone asks for that clip, a CDN hit after — instead of waiting on the browser's probe (64 KB) and frame grab (≈1 MB of the clip, decoded) per tile, which on a phone left most of the grid as empty boxes. The frame grab still runs for a clip the server had no picture for. A known-heavy clip wears its size badge over the still. vmedia makes 8 stills at once (was 4). tools/video-tile-poster-test.js

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Vps2H27rhbG9ZqseGfMrc3

1 files changed, 95 insertions, 0 deletions

diff --git a/tools/video-tile-poster-test.js b/tools/video-tile-poster-test.js
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+// Videos grid: a tile shows the server's still (vmedia thumb.jpg, cached at
+// the CDN) at once, instead of waiting on the browser's own probe and frame
+// grab — and never touches the clip itself for it. A clip the server has no
+// picture for falls back to the frame grab.
+// Run: bun tools/video-tile-poster-test.js
+import puppeteer from './puppeteer.js';
+import { cacheKeyFor } from '../src/wallet.js';
+import { generateSecretKey, getPublicKey, finalizeEvent } from 'nostr-tools/pure';
+import { buildHtml } from '../build.js';
+const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
+let ok = true;
+const check = (n, c, d = '') => { console.log(` ${c ? '✓' : '✗'} ${n}${d ? ' — ' + d : ''}`); if (!c) ok = false; };
+const JPG = '/tmp/coinos-video-tile-poster.jpg';
+Bun.spawnSync(['ffmpeg', '-y', '-loglevel', 'error', '-f', 'lavfi', '-i', 'color=c=orange:s=270x480', '-frames:v', '1', JPG]);
+const JPEG = Buffer.from(await Bun.file(JPG).arrayBuffer());
+const AUTHOR = (() => { const sk = generateSecretKey(); return { sk, pk: getPublicKey(sk) }; })();
+const now = Math.floor(Date.now() / 1000);
+const CLIP = (n) => 'https://media.test/' + n + '.mp4';
+const post = (n, ago) => finalizeEvent({ kind: 1, created_at: now - ago, content: 'clip ' + n + ' ' + CLIP(n),
+  tags: [['imeta', 'url ' + CLIP(n), 'm video/mp4', 'size 900000', 'dim 360x640']] }, AUTHOR.sk);
+const POSTS = [post('a', 100), post('b', 200), post('nopic', 300)];
+
+const html = await buildHtml({ minify: true, pwa: false });
+const server = Bun.serve({ port: 0, fetch: () => new Response(html, { headers: { 'content-type': 'text/html' } }) });
+const browser = await puppeteer.launch({ executablePath: '/usr/bin/google-chrome', headless: 'new', args: ['--no-sandbox'] });
+const page = await browser.newPage();
+await page.setRequestInterception(true);
+const asked = [];
+page.on('request', (r) => {
+  const u = new URL(r.url());
+  if (u.pathname.startsWith('/vmedia/thumb.jpg')) {
+    const src = u.searchParams.get('u');
+    asked.push(['thumb', src]);
+    if (src === CLIP('nopic')) return r.respond({ status: 404, body: 'No picture' });
+    return r.respond({ status: 200, contentType: 'image/jpeg', body: JPEG, headers: { 'access-control-allow-origin': '*' } });
+  }
+  if (u.host === 'media.test') { asked.push(['clip', r.url()]); return r.abort(); }
+  r.continue();
+});
+await page.evaluateOnNewDocument(() => {
+  const Real = window.WebSocket;
+  window.WebSocket = function (...a) {
+    const ws = new Real(...a);
+    const send = ws.send.bind(ws);
+    ws.send = (data) => {
+      try { const m = JSON.parse(data); if (m[0] === 'REQ') { setTimeout(() => ws.dispatchEvent(new MessageEvent('message', { data: JSON.stringify(['EOSE', m[1]]) })), 0); return; } if (m[0] === 'EVENT') return; } catch {}
+      return send(data);
+    };
+    return ws;
+  };
+  window.WebSocket.prototype = Real.prototype; Object.assign(window.WebSocket, Real);
+});
+const errs = [];
+page.on('pageerror', (e) => errs.push(String(e)));
+const click = (t) => page.evaluate((x) => { const e = [...document.querySelectorAll('button')].find((n) => n.textContent.trim().toLowerCase().includes(x)); if (e) { e.click(); return true; } return false; }, t);
+const waitText = async (x, ms = 25000) => { for (let i = 0; i < ms / 250; i++) { if ((await page.evaluate(() => document.body.innerText)).toLowerCase().includes(x)) return true; await sleep(250); } return false; };
+const waitFor = async (fn, ms = 10000) => { for (let i = 0; i < ms / 200; i++) { if (await page.evaluate(fn)) return true; await sleep(200); } return false; };
+
+try {
+  await page.setViewport({ width: 390, height: 844 });
+  await page.goto(server.url.href, { waitUntil: 'domcontentloaded' });
+  await page.evaluate(() => localStorage.setItem('btc-wallet-network', 'regtest'));
+  await page.reload({ waitUntil: 'domcontentloaded' });
+  await sleep(400);
+  await click('create a new wallet'); await sleep(600);
+  await page.waitForSelector('.words .w .t');
+  const mn = (await page.$$eval('.words .w .t', (l) => l.map((e) => e.textContent.trim()))).join(' ');
+  await click('skip verification');
+  await waitText('receive', 20000);
+  const base = cacheKeyFor(mn + '\n');
+  await page.evaluate(([k, pk, ns]) => {
+    localStorage.setItem(k + ':follows', JSON.stringify({ tags: [['p', pk]], c: '', at: Math.floor(Date.now() / 1000) }));
+    localStorage.setItem(k + ':feedNotes', JSON.stringify(ns));
+    localStorage.setItem(k + ':profiles', JSON.stringify({ [pk]: { name: 'Clipper', t: Date.now() } }));
+    localStorage.setItem('btc-wallet-feed:' + k, 'following');
+    localStorage.setItem('coinos-feed-media', 'videos');
+  }, [base, AUTHOR.pk, POSTS]);
+  await page.reload({ waitUntil: 'domcontentloaded' });
+  await waitText('receive', 20000);
+  await page.evaluate(() => document.querySelector('.app-nav-button[aria-label="Feed"]')?.click());
+
+  check('the Videos grid has the three clips', await waitFor(() => document.querySelectorAll('.media-grid .media-tile.video').length === 3, 15000),
+    String(await page.evaluate(() => document.querySelectorAll('.media-grid .media-tile.video').length)));
+  check('two tiles show the server\'s still, loaded', await waitFor(() => [...document.querySelectorAll('.media-tile.video img')]
+    .filter((i) => i.src.includes('/vmedia/thumb.jpg') && i.naturalWidth > 0).length === 2, 8000),
+    JSON.stringify(await page.evaluate(() => [...document.querySelectorAll('.media-tile.video')].map((t) => (t.querySelector('img')?.src || t.querySelector('video') ? 'video' : t.innerHTML).slice(-40)))));
+  check('the clip without one falls back to the frame grab', await waitFor(() => [...document.querySelectorAll('.media-tile.video')]
+    .some((t) => !t.querySelector('img') && (t.querySelector('video') || t.querySelector('.media-tile-cost'))), 8000));
+  await sleep(1500);
+  const clipHits = asked.filter(([k, u]) => k === 'clip' && !u.includes('nopic'));
+  check('the pictured clips themselves were never fetched for a still', clipHits.length === 0, clipHits.map((x) => x[1]).join(', '));
+  check('no page errors', errs.length === 0, errs.slice(0, 2).join(' | '));
+} finally { await browser.close(); server.stop(true); }
+console.log(ok ? '\n✅ video tiles show the server\'s still at once' : '\n❌ failed');
+process.exit(ok ? 0 : 1);