Organize uploader storage and restore transfer readiness

tests/e2e/transfer-reconnect.mjs

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+import assert from 'node:assert/strict';
+import { chromium } from '@playwright/test';
+import { mkdtemp, rm, readFile } from 'node:fs/promises';
+import { tmpdir } from 'node:os';
+import { resolve } from 'node:path';
+import { createApp } from '../../apps/server/src/app.ts';
+import { loadConfig } from '../../apps/server/src/config.ts';
+import { requests as table } from '../../apps/server/src/db/schema.ts';
+
+const folder = await mkdtemp(resolve(tmpdir(), 'hop-reconnect-'));
+const runtime = await createApp({
+  ...loadConfig({
+    APP_URL: 'http://127.0.0.1',
+    DATABASE_PATH: resolve(folder, 'db.sqlite'),
+    UPLOAD_DIR: resolve(folder, 'uploads'),
+    MIN_FREE_DISK_MB: '0',
+    SAME_NETWORK_DISCOVERY_ENABLED: 'true',
+    LOCATION_DISCOVERY_ENABLED: 'false',
+    SESSION_SECRET: 's'.repeat(40),
+    DISCOVERY_SECRET: 'd'.repeat(40),
+  }),
+  webRoot: resolve('apps/web/dist'),
+});
+let browser;
+try {
+  await runtime.app.listen({ host: '127.0.0.1', port: 0 });
+  const url = `http://127.0.0.1:${runtime.app.server.address().port}`;
+  runtime.setDevOrigin(url);
+  browser = await chromium.launch({
+    headless: true,
+    ...(process.env.HOP_BROWSER_EXECUTABLE
+      ? { executablePath: process.env.HOP_BROWSER_EXECUTABLE }
+      : {}),
+  });
+  const a = await browser.newContext({ viewport: { width: 1280, height: 900 } }),
+    b = await browser.newContext({
+      viewport: { width: 390, height: 844 },
+      isMobile: true,
+      hasTouch: true,
+    });
+  const sender = await a.newPage(),
+    receiver = await b.newPage(),
+    errors = [];
+  for (const page of [sender, receiver])
+    page.on('pageerror', (error) => errors.push(error.message));
+  await Promise.all([sender.goto(url), receiver.goto(url)]);
+  await sender.locator('.peer-card').first().waitFor();
+  const receiverState = await receiver.evaluate(
+    async () => (await (await fetch('/api/device/me')).json()).device,
+  );
+  const guestId = runtime.service.deviceGuest(receiverState.id).guestId;
+  await sender.locator('.peer-card').first().click();
+  const bytes = Buffer.from('first-click transfer');
+  await sender
+    .locator('.send-dialog input[type="file"]')
+    .setInputFiles({ name: 'first.txt', mimeType: 'text/plain', buffer: bytes });
+  let hold = true;
+  runtime.io.use((socket, next) => {
+    if (hold && socket.data.guest.id === guestId) setTimeout(() => next(), 1200);
+    else next();
+  });
+  const serverSocket = [...runtime.io.sockets.sockets.values()].find(
+    (socket) => socket.data.guest.id === guestId,
+  );
+  serverSocket.conn.close();
+  await receiver.locator('.app-shell[data-online="false"]').waitFor();
+  const responses = [],
+    keys = [];
+  sender.on('response', (response) => {
+    if (
+      new URL(response.url()).pathname === '/api/transfer-requests' &&
+      response.request().method() === 'POST'
+    ) {
+      responses.push(response.status());
+      keys.push(response.request().headers()['idempotency-key']);
+    }
+  });
+  await sender.getByRole('button', { name: '전송하기', exact: true }).click();
+  await sender.getByRole('button', { name: '연결 확인 중', exact: true }).waitFor();
+  assert.equal(await sender.locator('.error-toast').count(), 0);
+  assert.match(await sender.locator('.selected-files').innerText(), /first.txt/);
+  await receiver.getByRole('button', { name: '수락', exact: true }).waitFor();
+  hold = false;
+  assert.equal(responses[0], 409);
+  assert.equal(responses.at(-1), 200);
+  assert.equal(new Set(keys).size, 1, 'reconnect retry reuses one idempotency key');
+  assert.equal(runtime.service.db.select().from(table).all().length, 1, 'only one logical request');
+  const downloaded = receiver.waitForEvent('download');
+  await receiver.getByRole('button', { name: '수락', exact: true }).click();
+  const download = await downloaded;
+  assert.equal(download.suggestedFilename(), 'first.txt');
+  assert.deepEqual(await readFile(await download.path()), bytes);
+  assert.equal(await sender.locator('.error-toast').count(), 0);
+  assert.deepEqual(errors, []);
+  console.log(
+    'PASS: same-network peer reconnect on first file send, connection feedback, file draft retained, stable retry key, one request, accepted download on mobile.',
+  );
+} finally {
+  await browser?.close();
+  await runtime.app.close();
+  await rm(folder, { recursive: true, force: true });
+}