Fix final-review findings for Playwright fallback

- server.js: catch browser-launch failures inside the injected
  fetchAndExtractPriceViaBrowser wrapper so they route through
  checkProduct's normal error classification (recordCheckFailure)
  instead of escaping as a thrown error that bypasses the DB write.
- server.js: add an in-flight guard around runCheck so overlapping
  callers (cron + check-now) share one run instead of each launching
  its own Chromium.
- Dockerfile: copy only package.json/package-lock.json/node_modules
  before installing Chromium so the expensive install layer is keyed
  to dependency changes, not every commit; copy the rest of the app
  afterward.
- Dockerfile: clean up apt package lists after the Playwright install
  step, matching the build stage's existing cleanup.
- README.md: note that exercising the fallback locally (not just
  running the test suite) needs `npx playwright install chromium`.
- README.md: correct the fallback description — domcontentloaded
  navigation reads the page before most client-side JS finishes, so
  the fallback mainly helps with HTTP-client blocking, not JS-rendered
  prices; reworded to drop the inaccurate claim.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013gwc3aCiyQxmCWQke8RvEz

.dockerignore

@@ -0,0 +1,6 @@
+node_modules
+data
+.env
+.git
+docs
+test

.gitignore

@@ -1,3 +1,4 @@
 node_modules/
 data/
 .env
+.claude/

Dockerfile

@@ -0,0 +1,23 @@
+FROM node:22-slim AS build
+RUN apt-get update && apt-get install -y --no-install-recommends python3 build-essential \
+    && rm -rf /var/lib/apt/lists/*
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci --omit=dev
+COPY . .
+
+FROM node:22-slim
+WORKDIR /app
+COPY --from=build /app/package.json /app/package-lock.json ./
+COPY --from=build /app/node_modules ./node_modules
+RUN npx --yes playwright install --with-deps chromium \
+    && rm -rf /var/lib/apt/lists/*
+COPY --from=build /app .
+ENV NODE_ENV=production
+# De SQLite-database hoort op het persistente volume te staan; zonder deze
+# default zou een vergeten DB_PATH stilletjes naar de container-fs schrijven
+# en bij elke redeploy alle data verliezen.
+ENV DB_PATH=/data/korting.db
+VOLUME /data
+EXPOSE 3000
+CMD ["node", "server.js"]

README.md

@@ -0,0 +1,53 @@
+# Korting — prijstracker
+
+Houdt een lijst productpagina's dagelijks in de gaten en mailt wanneer
+de prijs verandert.
+
+## Lokaal draaien
+
+```bash
+npm install
+cp .env.example .env   # env vars invullen
+npm test
+npm start
+```
+
+De app leest `.env` in via `dotenv`. `BASIC_AUTH_USER`, `BASIC_AUTH_PASS`,
+`SMTP_FROM` en `NOTIFY_EMAIL` zijn verplicht; ontbreken ze, dan stopt de
+app bij het opstarten met een melding.
+
+De UI staat achter basic auth (`BASIC_AUTH_USER` / `BASIC_AUTH_PASS`) op
+`http://localhost:3000`.
+
+Wil je de headless-browser-fallback ook echt lokaal uitproberen (de
+testsuite gebruikt fakes en heeft hier geen echte browser voor nodig), run
+dan eerst `npx playwright install chromium` om de Chromium-binary te
+downloaden.
+
+## Environment variables
+
+| Variabele | Omschrijving |
+|---|---|
+| `PORT` | HTTP-poort (default `3000`) |
+| `DB_PATH` | Pad naar het SQLite-bestand (default `./data/korting.db`) |
+| `BASIC_AUTH_USER` / `BASIC_AUTH_PASS` | Login voor de web-UI |
+| `SMTP_HOST` / `SMTP_PORT` / `SMTP_USER` / `SMTP_PASS` | SMTP-server (Postal op `mail.sjoerd.app`) |
+| `SMTP_FROM` | Afzenderadres van de notificatiemails |
+| `NOTIFY_EMAIL` | Ontvangeradres van de notificatiemails |
+
+## Hoe het werkt
+
+Elke dag om 08:00 (Europe/Amsterdam) doorloopt de app alle producten,
+haalt de huidige prijs op (JSON-LD → meta tags → regex-fallback), en
+stuurt een email als de prijs is veranderd sinds de vorige geslaagde
+check. Een mislukte poging (pagina onbereikbaar, geen prijs gevonden,
+of de mail kon niet verstuurd worden) verandert de opgeslagen prijs
+niet, zodat de volgende dag opnieuw wordt geprobeerd. Via de "Nu
+controleren"-knop in de UI kan dit ook handmatig getriggerd worden.
+
+Als het ophalen van de prijs op de gewone manier mislukt (netwerkfout, of
+geen prijs gevonden in de HTML), probeert de app het één keer opnieuw met
+een echte headless-browser (Playwright/Chromium) — nuttig voor pagina's
+die eenvoudige HTTP-clients blokkeren. Geen garantie tegen elke vorm van
+bot-detectie, maar dekt een reëel deel van de gevallen die de gewone
+aanpak mist.

docs/superpowers/plans/2026-09-05-korting-playwright-fallback.md

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+# Korting Playwright-fallback Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** When the existing plain-fetch price scraper fails (network error or no price found), retry once with a real headless-Chromium page load (Playwright) before recording the check as failed.
+
+**Architecture:** A new, self-contained `src/browserScraper.js` module wraps Playwright and reuses `extractPrice()` from the existing `src/scraper.js` (no duplicated parsing logic). `checkProducts.js` gains one new *optional* injected dependency that it calls only when the primary fetch already failed — `scraper.js` itself is untouched. `server.js` lazily launches one browser per `runCheck()` run (only if a fallback is actually needed), reuses it for the rest of that run, and always closes it in a `finally`.
+
+**Tech Stack:** Playwright (`chromium`), same Node.js 22 / CommonJS / `node --test` stack as the rest of the project.
+
+**Spec:** `docs/superpowers/specs/2026-09-05-korting-playwright-fallback-design.md` (builds on `docs/superpowers/specs/2026-09-05-korting-prijstracker-design.md`)
+
+## Global Constraints
+
+- Node.js 22, CommonJS modules, no TypeScript — matches the existing codebase.
+- `src/scraper.js` and its tests are **not modified** by this plan — the fallback is a separate module, invoked from `checkProducts.js`, not from inside `fetchAndExtractPrice`.
+- The browser fallback is invoked **only** when the primary `fetchAndExtractPrice` result has `error` or `price === null` — never when it already found a price.
+- Every existing test must keep passing unmodified in behavior (the new dependency is optional; omitting it from `deps` must not change any existing test's outcome).
+- `playwright` is a production dependency (not `devDependencies`) — the Docker runtime stage needs it, not just the build stage.
+- **Local `npm install` must not attempt to download the actual Chromium binary** — set `PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD=1` in the environment before running `npm install` so the postinstall step is skipped. The real browser binary is only installed inside the Docker image (Task 4) via `npx playwright install --with-deps chromium`. Tasks 1-3 never need a real Chromium binary in the dev/test sandbox — all automated tests use fake browser/page objects (dependency injection), and Task 3's manual check deliberately avoids exercising the fallback path for this reason. Task 4's Docker build/run verification is the first (and only) point in this plan where a real browser actually launches.
+- Timeout for a fallback page load: 20000ms (`timeoutMs` default), passed to Playwright's `page.goto` timeout option.
+
+---
+
+### Task 1: Browser-based scraper module
+
+**Files:**
+- Modify: `package.json` (add `playwright` dependency)
+- Create: `src/browserScraper.js`
+- Create: `test/browserScraper.test.js`
+
+**Interfaces:**
+- Consumes: `extractPrice` from `src/scraper.js` (already exported, unchanged signature: `extractPrice(html) -> { price: number|null, method: string|null }`).
+- Produces:
+  - `launchBrowser() -> Promise<Browser>` — thin wrapper around Playwright's `chromium.launch({ headless: true })`.
+  - `fetchAndExtractPriceViaBrowser(browser, url, { timeoutMs = 20000 } = {}) -> Promise<{ price: number|null, method: string|null, error: Error|null }>` — same return shape as `scraper.js`'s `fetchAndExtractPrice`, so later tasks can treat both interchangeably.
+
+- [ ] **Step 1: Add the `playwright` dependency**
+
+Run (this environment must not attempt to download the Chromium binary — see Global Constraints):
+
+```bash
+PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD=1 npm install playwright
+```
+
+Expected: `package.json`'s `dependencies` gains a `playwright` entry (not `devDependencies`), `package-lock.json` updates, and the command completes without trying to download a browser binary.
+
+- [ ] **Step 2: Write the failing tests**
+
+Create `test/browserScraper.test.js`:
+
+```js
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const { fetchAndExtractPriceViaBrowser } = require('../src/browserScraper');
+
+test('fetchAndExtractPriceViaBrowser extracts a price from the rendered page', async () => {
+  let closed = false;
+  const html = '<html><head><meta property="og:price:amount" content="42.00" /></head><body></body></html>';
+  const page = {
+    goto: async () => {},
+    content: async () => html,
+    close: async () => { closed = true; },
+  };
+  const browser = { newPage: async () => page };
+  const result = await fetchAndExtractPriceViaBrowser(browser, 'https://example.com');
+  assert.deepEqual(result, { price: 42, method: 'meta', error: null });
+  assert.equal(closed, true);
+});
+
+test('fetchAndExtractPriceViaBrowser returns an error when navigation fails, and still closes the page', async () => {
+  let closed = false;
+  const page = {
+    goto: async () => { throw new Error('Timeout 20000ms exceeded'); },
+    content: async () => '',
+    close: async () => { closed = true; },
+  };
+  const browser = { newPage: async () => page };
+  const result = await fetchAndExtractPriceViaBrowser(browser, 'https://example.com');
+  assert.equal(result.price, null);
+  assert.equal(result.method, null);
+  assert.ok(result.error instanceof Error);
+  assert.equal(closed, true);
+});
+
+test('fetchAndExtractPriceViaBrowser returns null price when nothing matches, and still closes the page', async () => {
+  let closed = false;
+  const page = {
+    goto: async () => {},
+    content: async () => '<html><body><p>Geen prijs</p></body></html>',
+    close: async () => { closed = true; },
+  };
+  const browser = { newPage: async () => page };
+  const result = await fetchAndExtractPriceViaBrowser(browser, 'https://example.com');
+  assert.deepEqual(result, { price: null, method: null, error: null });
+  assert.equal(closed, true);
+});
+
+test('fetchAndExtractPriceViaBrowser closes the page even if reading its content throws', async () => {
+  let closed = false;
+  const page = {
+    goto: async () => {},
+    content: async () => { throw new Error('content failed'); },
+    close: async () => { closed = true; },
+  };
+  const browser = { newPage: async () => page };
+  const result = await fetchAndExtractPriceViaBrowser(browser, 'https://example.com');
+  assert.ok(result.error instanceof Error);
+  assert.equal(closed, true);
+});
+
+test('fetchAndExtractPriceViaBrowser passes the timeout option through to page.goto', async () => {
+  let receivedOptions;
+  const page = {
+    goto: async (url, options) => { receivedOptions = options; },
+    content: async () => '<html><body></body></html>',
+    close: async () => {},
+  };
+  const browser = { newPage: async () => page };
+  await fetchAndExtractPriceViaBrowser(browser, 'https://example.com', { timeoutMs: 5000 });
+  assert.equal(receivedOptions.timeout, 5000);
+});
+```
+
+- [ ] **Step 3: Run tests to verify they fail**
+
+Run: `npm test`
+Expected: FAIL with "Cannot find module '../src/browserScraper'"
+
+- [ ] **Step 4: Write `src/browserScraper.js`**
+
+```js
+const { chromium } = require('playwright');
+const { extractPrice } = require('./scraper');
+
+async function launchBrowser() {
+  return chromium.launch({ headless: true });
+}
+
+async function fetchAndExtractPriceViaBrowser(browser, url, { timeoutMs = 20000 } = {}) {
+  let page;
+  try {
+    page = await browser.newPage();
+    await page.goto(url, { waitUntil: 'domcontentloaded', timeout: timeoutMs });
+    const html = await page.content();
+    const { price, method } = extractPrice(html);
+    return { price, method, error: null };
+  } catch (err) {
+    return { price: null, method: null, error: err };
+  } finally {
+    if (page) {
+      await page.close().catch(() => {});
+    }
+  }
+}
+
+module.exports = { launchBrowser, fetchAndExtractPriceViaBrowser };
+```
+
+- [ ] **Step 5: Run tests to verify they pass**
+
+Run: `npm test`
+Expected: PASS (all `browserScraper.test.js` tests + every previously-passing test, unchanged)
+
+- [ ] **Step 6: Commit**
+
+```bash
+git add package.json package-lock.json src/browserScraper.js test/browserScraper.test.js
+git commit -m "feat: add Playwright-based fallback scraper"
+```
+
+---
+
+### Task 2: Wire the fallback into the price-check orchestration
+
+**Files:**
+- Modify: `src/checkProducts.js`
+- Modify: `test/checkProducts.test.js`
+
+**Interfaces:**
+- Consumes: `fetchAndExtractPriceViaBrowser`-shaped function (Task 1's return shape), passed as the new optional `deps.fetchAndExtractPriceViaBrowser(url) -> Promise<{price, method, error}>`. `checkProducts.js` does not `require` Task 1's module directly — the composition root (Task 3) curries in the real browser instance.
+- Produces: `checkProduct`/`checkAllProducts` — same exported names and signatures as before; the only change is that `checkProduct`'s deps object now recognizes one more optional key.
+
+The current `src/checkProducts.js` (for reference — this is what you are editing):
+
+```js
+async function checkProduct(product, deps) {
+  const { fetchAndExtractPrice, sendMail, recordCheckSuccess, recordCheckFailure, now } = deps;
+  const result = await fetchAndExtractPrice(product.url);
+
+  if (result.error) {
+    console.error(`[check] fetch_error "${product.name}" (${product.url}): ${result.error.message}`);
+    recordCheckFailure(product.id, 'fetch_error');
+    return { status: 'fetch_error' };
+  }
+  if (result.price == null) {
+    console.error(`[check] not_found "${product.name}" (${product.url}): geen prijs gevonden op de pagina`);
+    recordCheckFailure(product.id, 'not_found');
+    return { status: 'not_found' };
+  }
+
+  const isBaseline = product.last_price == null;
+  const changed = !isBaseline && result.price !== product.last_price;
+
+  if (changed) {
+    try {
+      await sendMail({
+        name: product.name,
+        url: product.url,
+        oldPrice: product.last_price,
+        newPrice: result.price,
+      });
+    } catch (err) {
+      console.error(`[check] mail_error "${product.name}" (${product.url}): ${err && err.message}`);
+      recordCheckFailure(product.id, 'mail_error');
+      return { status: 'mail_error' };
+    }
+  }
+
+  recordCheckSuccess(product.id, { price: result.price, checkedAt: now() });
+  return { status: 'ok', changed };
+}
+
+async function checkAllProducts(products, deps) {
+  const results = [];
+  for (const product of products) {
+    try {
+      const result = await checkProduct(product, deps);
+      results.push({ productId: product.id, ...result });
+    } catch (err) {
+      console.error(`[check] error "${product.name}" (${product.url}): ${err && err.message}`);
+      results.push({ productId: product.id, status: 'error', error: err });
+    }
+  }
+  return results;
+}
+
+module.exports = { checkProduct, checkAllProducts };
+```
+
+The current `test/checkProducts.test.js` (for reference — you are appending new tests to this file, not replacing the existing ones):
+
+```js
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const { checkProduct, checkAllProducts } = require('../src/checkProducts');
+
+function makeDeps(overrides = {}) {
+  const failures = [];
+  const successes = [];
+  const mailCalls = [];
+  const deps = {
+    fetchAndExtractPrice: async () => ({ price: 10, method: 'meta', error: null }),
+    sendMail: async (payload) => { mailCalls.push(payload); },
+    recordCheckFailure: (id, status) => failures.push({ id, status }),
+    recordCheckSuccess: (id, data) => successes.push({ id, ...data }),
+    now: () => '2026-09-05T08:00:00.000Z',
+    ...overrides,
+  };
+  return { deps, failures, successes, mailCalls };
+}
+
+// Failure paths log to stderr; capture it so the test output stays clean
+// while still proving the logging happened.
+function captureErrorLog(t) {
+  const logged = [];
+  t.mock.method(console, 'error', (...args) => { logged.push(args.join(' ')); });
+  return logged;
+}
+
+// ... (existing tests, unchanged — do not modify or remove any of them)
+```
+
+- [ ] **Step 1: Write the failing tests**
+
+Append these tests to the end of `test/checkProducts.test.js` (after the existing `checkAllProducts processes every product independently...` test, before the final closing of the file):
+
+```js
+test('checkProduct tries the browser fallback when the primary fetch errors, and uses its result', async (t) => {
+  captureErrorLog(t);
+  const browserCalls = [];
+  const { deps, successes, mailCalls } = makeDeps({
+    fetchAndExtractPrice: async () => ({ price: null, method: null, error: new Error('down') }),
+    fetchAndExtractPriceViaBrowser: async (url) => {
+      browserCalls.push(url);
+      return { price: 10, method: 'json-ld', error: null };
+    },
+  });
+  const product = { id: 7, name: 'X', url: 'https://x', last_price: null };
+  const result = await checkProduct(product, deps);
+  assert.equal(result.status, 'ok');
+  assert.deepEqual(browserCalls, ['https://x']);
+  assert.equal(successes.length, 1);
+  assert.equal(mailCalls.length, 0);
+});
+
+test('checkProduct tries the browser fallback when the primary fetch finds no price', async (t) => {
+  captureErrorLog(t);
+  const browserCalls = [];
+  const { deps, successes } = makeDeps({
+    fetchAndExtractPrice: async () => ({ price: null, method: null, error: null }),
+    fetchAndExtractPriceViaBrowser: async (url) => {
+      browserCalls.push(url);
+      return { price: 12, method: 'regex', error: null };
+    },
+  });
+  const product = { id: 8, name: 'X', url: 'https://x', last_price: null };
+  const result = await checkProduct(product, deps);
+  assert.equal(result.status, 'ok');
+  assert.deepEqual(browserCalls, ['https://x']);
+  assert.equal(successes.length, 1);
+});
+
+test('checkProduct never calls the browser fallback when the primary fetch already succeeds', async () => {
+  const browserCalls = [];
+  const { deps } = makeDeps({
+    fetchAndExtractPriceViaBrowser: async (url) => {
+      browserCalls.push(url);
+      return { price: 999, method: 'meta', error: null };
+    },
+  });
+  const product = { id: 9, name: 'X', url: 'https://x', last_price: null };
+  await checkProduct(product, deps);
+  assert.equal(browserCalls.length, 0);
+});
+
+test('checkProduct records fetch_error when both the primary fetch and the browser fallback fail', async (t) => {
+  const logged = captureErrorLog(t);
+  const { deps, failures, successes } = makeDeps({
+    fetchAndExtractPrice: async () => ({ price: null, method: null, error: new Error('down') }),
+    fetchAndExtractPriceViaBrowser: async () => ({ price: null, method: null, error: new Error('still down') }),
+  });
+  const product = { id: 10, name: 'X', url: 'https://x', last_price: 10 };
+  const result = await checkProduct(product, deps);
+  assert.equal(result.status, 'fetch_error');
+  assert.deepEqual(failures, [{ id: 10, status: 'fetch_error' }]);
+  assert.equal(successes.length, 0);
+  assert.equal(logged.length, 1);
+  assert.match(logged[0], /fetch_error.*still down/);
+});
+```
+
+- [ ] **Step 2: Run tests to verify they fail**
+
+Run: `npm test`
+Expected: FAIL — the 4 new tests fail because `checkProduct` doesn't yet call `fetchAndExtractPriceViaBrowser` (e.g. the "tries the browser fallback" tests fail their `browserCalls` assertions with an empty array; the "never calls" test passes vacuously already, which is fine — it's a guard for the next step, not expected to fail).
+
+- [ ] **Step 3: Modify `src/checkProducts.js`**
+
+Change only the first few lines of `checkProduct` (everything from the baseline/changed logic onward stays exactly as it is):
+
+```js
+async function checkProduct(product, deps) {
+  const {
+    fetchAndExtractPrice, fetchAndExtractPriceViaBrowser,
+    sendMail, recordCheckSuccess, recordCheckFailure, now,
+  } = deps;
+  let result = await fetchAndExtractPrice(product.url);
+
+  if ((result.error || result.price == null) && fetchAndExtractPriceViaBrowser) {
+    result = await fetchAndExtractPriceViaBrowser(product.url);
+  }
+
+  if (result.error) {
+    console.error(`[check] fetch_error "${product.name}" (${product.url}): ${result.error.message}`);
+    recordCheckFailure(product.id, 'fetch_error');
+    return { status: 'fetch_error' };
+  }
+  if (result.price == null) {
+    console.error(`[check] not_found "${product.name}" (${product.url}): geen prijs gevonden op de pagina`);
+    recordCheckFailure(product.id, 'not_found');
+    return { status: 'not_found' };
+  }
+
+  const isBaseline = product.last_price == null;
+  const changed = !isBaseline && result.price !== product.last_price;
+
+  if (changed) {
+    try {
+      await sendMail({
+        name: product.name,
+        url: product.url,
+        oldPrice: product.last_price,
+        newPrice: result.price,
+      });
+    } catch (err) {
+      console.error(`[check] mail_error "${product.name}" (${product.url}): ${err && err.message}`);
+      recordCheckFailure(product.id, 'mail_error');
+      return { status: 'mail_error' };
+    }
+  }
+
+  recordCheckSuccess(product.id, { price: result.price, checkedAt: now() });
+  return { status: 'ok', changed };
+}
+```
+
+(`checkAllProducts` and `module.exports` are unchanged — leave them exactly as they are.)
+
+- [ ] **Step 4: Run tests to verify they pass**
+
+Run: `npm test`
+Expected: PASS (all new tests + every previously-passing test, unchanged)
+
+- [ ] **Step 5: Commit**
+
+```bash
+git add src/checkProducts.js test/checkProducts.test.js
+git commit -m "feat: fall back to the browser scraper when the primary fetch fails"
+```
+
+---
+
+### Task 3: Wire the browser lifecycle into the composition root
+
+**Files:**
+- Modify: `server.js`
+
+**Interfaces:**
+- Consumes: `launchBrowser`, `fetchAndExtractPriceViaBrowser` (Task 1); `checkProduct`'s new optional `fetchAndExtractPriceViaBrowser` deps key (Task 2).
+- Produces: nothing new for other tasks to consume — `server.js` is the top of the dependency graph.
+
+No new automated test — this is a composition-root change, verified with a manual smoke check (same pattern as the original server.js task). **This step does not require a real Chromium binary**: the smoke check below only exercises a product whose plain fetch succeeds, so the lazy browser launch never actually triggers.
+
+- [ ] **Step 1: Modify `server.js`**
+
+Add the import (alongside the other `require`s near the top):
+
+```js
+const { launchBrowser, fetchAndExtractPriceViaBrowser } = require('./src/browserScraper');
+```
+
+Replace the `runCheck` function with a version that lazily launches one browser per run, only if a fallback is actually needed, and always closes it:
+
+```js
+async function runCheck() {
+  const products = listProducts(db);
+  let browserPromise = null;
+  function getBrowser() {
+    if (!browserPromise) {
+      browserPromise = launchBrowser();
+    }
+    return browserPromise;
+  }
+  try {
+    const deps = {
+      fetchAndExtractPrice,
+      fetchAndExtractPriceViaBrowser: async (url) => {
+        const browser = await getBrowser();
+        return fetchAndExtractPriceViaBrowser(browser, url);
+      },
+      sendMail: (payload) => sendPriceChangeEmail(transport, {
+        from: process.env.SMTP_FROM,
+        to: process.env.NOTIFY_EMAIL,
+        ...payload,
+      }),
+      recordCheckFailure: (id, status) => recordCheckFailure(db, id, status),
+      recordCheckSuccess: (id, data) => recordCheckSuccess(db, id, data),
+      now: () => new Date().toISOString(),
+    };
+    const results = await checkAllProducts(products, deps);
+    console.log(`[check] ${products.length} product(en) gecontroleerd: ${summarize(results)}`);
+    return results;
+  } finally {
+    if (browserPromise) {
+      const browser = await browserPromise;
+      await browser.close().catch((err) => {
+        console.error(`[check] kon de browser niet netjes sluiten: ${err && err.message}`);
+      });
+    }
+  }
+}
+```
+
+(Everything else in `server.js` — the required-env check, `openDb`, `createTransport`, `summarize`, `startScheduler(runCheck)`, `createApp({...})`, `app.listen(...)` — stays exactly as it is.)
+
+- [ ] **Step 2: Manual smoke check (no real browser needed for this check)**
+
+Deliberately **do not** call `/check-now` in this step: with the Task 2
+change, any URL whose plain fetch doesn't yield a price (which is most
+URLs without a real product price, e.g. `https://example.com`) now
+triggers the browser fallback — and no real Chromium binary is installed
+in this dev sandbox (see Global Constraints). Exercising the actual
+fallback path with a real browser is Task 4's job, once Chromium is
+installed in the Docker image. This step only proves `server.js` still
+starts and its non-check routes still work after the edit — i.e. that the
+new `require('./src/browserScraper')` and the rewritten `runCheck` are
+syntactically sound and don't break anything at startup.
+
+Run:
+```bash
+cp .env.example .env
+# edit .env: fill in real BASIC_AUTH_USER/PASS and SMTP_FROM/NOTIFY_EMAIL at minimum
+set -a; source .env; set +a
+node server.js
+```
+In another terminal:
+```bash
+curl -u "$BASIC_AUTH_USER:$BASIC_AUTH_PASS" -X POST http://localhost:3000/products \
+  -d "name=Testproduct" -d "url=https://example.com"
+curl -u "$BASIC_AUTH_USER:$BASIC_AUTH_PASS" http://localhost:3000/
+```
+Expected: both succeed (302, then 200 with "Testproduct" visible in the
+list). Stop the server with Ctrl-C — do not proceed to `/check-now` here.
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add server.js
+git commit -m "feat: launch a lazy per-run browser for the fallback scraper"
+```
+
+---
+
+### Task 4: Docker image — install Chromium for the fallback
+
+**Files:**
+- Modify: `Dockerfile`
+- Modify: `README.md`
+
+**Interfaces:** none — this task only changes the deployment image and documentation.
+
+The current `Dockerfile` (for reference):
+
+```dockerfile
+FROM node:22-slim AS build
+RUN apt-get update && apt-get install -y --no-install-recommends python3 build-essential \
+    && rm -rf /var/lib/apt/lists/*
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci --omit=dev
+COPY . .
+
+FROM node:22-slim
+WORKDIR /app
+COPY --from=build /app .
+ENV NODE_ENV=production
+# De SQLite-database hoort op het persistente volume te staan; zonder deze
+# default zou een vergeten DB_PATH stilletjes naar de container-fs schrijven
+# en bij elke redeploy alle data verliezen.
+ENV DB_PATH=/data/korting.db
+VOLUME /data
+EXPOSE 3000
+CMD ["node", "server.js"]
+```
+
+- [ ] **Step 1: Modify the `Dockerfile`'s runtime stage**
+
+Add the Chromium install line right after `COPY --from=build /app .` (this is the first point where `playwright` from `node_modules` is available to `npx`, and it's the stage that actually runs the browser, so the browser binary + its system libraries belong here, not in the build stage):
+
+```dockerfile
+FROM node:22-slim AS build
+RUN apt-get update && apt-get install -y --no-install-recommends python3 build-essential \
+    && rm -rf /var/lib/apt/lists/*
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci --omit=dev
+COPY . .
+
+FROM node:22-slim
+WORKDIR /app
+COPY --from=build /app .
+RUN npx --yes playwright install --with-deps chromium
+ENV NODE_ENV=production
+# De SQLite-database hoort op het persistente volume te staan; zonder deze
+# default zou een vergeten DB_PATH stilletjes naar de container-fs schrijven
+# en bij elke redeploy alle data verliezen.
+ENV DB_PATH=/data/korting.db
+VOLUME /data
+EXPOSE 3000
+CMD ["node", "server.js"]
+```
+
+- [ ] **Step 2: Update `README.md`**
+
+Add one short paragraph after the existing "Hoe het werkt" section explaining the fallback (read the current `README.md` first to place it consistently with the existing tone/structure):
+
+```markdown
+Als het ophalen van de prijs op de gewone manier mislukt (netwerkfout, of
+geen prijs gevonden in de HTML), probeert de app het één keer opnieuw met
+een echte headless-browser (Playwright/Chromium) — nuttig voor pagina's
+die de prijs pas met JavaScript renderen, of die eenvoudige HTTP-clients
+blokkeren. Geen garantie tegen elke vorm van bot-detectie, maar dekt een
+reëel deel van de gevallen die de gewone aanpak mist.
+```
+
+- [ ] **Step 3: Manual build/run verification (this is the first task that needs a real browser)**
+
+Run:
+```bash
+docker build -t korting .
+```
+Expected: build succeeds; watch for the `playwright install --with-deps chromium` step completing without error (it will print apt package installation output — that's expected).
+
+Run:
+```bash
+docker run --rm -d --name korting-fallback-smoketest -p 3002:3000 \
+  -e BASIC_AUTH_USER=admin -e BASIC_AUTH_PASS=test \
+  -e SMTP_HOST=mail.sjoerd.app -e SMTP_PORT=587 \
+  -e SMTP_FROM=korting@sjoerd.app -e NOTIFY_EMAIL=test@example.com \
+  -e DB_PATH=/data/korting.db -v korting-fallback-smoketest-data:/data \
+  korting
+sleep 2
+curl -u admin:test -X POST http://localhost:3002/products \
+  -d "name=Fallback test" -d "url=https://example.com"
+curl -u admin:test -X POST http://localhost:3002/check-now
+docker logs korting-fallback-smoketest 2>&1 | tail -20
+```
+Expected: the `check-now` request succeeds (302); the container logs show the `[check] 1 product(en) gecontroleerd: ...` summary line. This URL (`https://example.com`) has no parseable price, so the primary fetch will return `not_found`, which **does** trigger the fallback — confirm the logs show no crash and no unhandled Playwright error (a `not_found` after the fallback also finds nothing is the expected, correct outcome here — the goal of this check is proving the browser actually launches and runs inside the container without error, not that this particular blank test page has a price).
+
+Clean up:
+```bash
+docker stop korting-fallback-smoketest
+docker volume rm korting-fallback-smoketest-data
+docker rmi korting
+```
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add Dockerfile README.md
+git commit -m "chore: install Chromium in the Docker image for the fallback scraper"
+```
+
+---
+
+## After this plan
+
+Deploy the merged result to Coolify (redeploy the existing `korting.sjoerd.app` application — same app, no new resources needed) via the `deploying-to-coolify` skill, and verify against the actual reported failing URL
+(`https://www.iciparisxl.nl/chanel/bleu-de-chanel/parfum-verstuiver/p/BP_967866`)
+using Coolify's deployment/application logs — not a direct request from this
+machine, since the user has since rotated the app's basic-auth credentials
+and testing now happens on their side.

docs/superpowers/specs/2026-09-05-korting-playwright-fallback-design.md

@@ -0,0 +1,128 @@
+# Korting — Playwright-fallback voor prijs-extractie
+
+**Datum:** 2026-09-05
+**Status:** Approved
+**Bouwt voort op:** `2026-09-05-korting-prijstracker-design.md`
+
+## Aanleiding
+
+Een gebruiker meldde dat `fetchAndExtractPrice` faalt voor
+`https://www.iciparisxl.nl/...` met `fetch_error HTTP 403`. Onderzoek
+(systematic-debugging) toonde aan dat dit domein achter **Akamai Bot
+Manager** draait: elk verzoek dat niet als "echte browser" wordt herkend
+krijgt al op de edge een `403 Access Denied` (`server: AkamaiGHost`),
+vóórdat de eigenlijke website bereikt wordt. Bevestigd zowel met een
+directe `curl`-test (ook met browser-achtige User-Agent) als via de live
+app zelf (identieke `fetch_error HTTP 403` in de logs). Dit is geen bug in
+de bestaande scraper-logica — die blijft correct voor de meeste shops —
+maar een structurele blokkade die headers alleen niet oplossen.
+
+**Belangrijk:** een headless-browser fallback is geen garantie tegen
+Akamai specifiek (die kan ook headless browsers detecteren), maar is de
+enige realistische route voor sites die de prijs pas client-side
+renderen, en verbetert de dekking voor dat bredere geval.
+
+## Doel
+
+Wanneer de bestaande `fetchAndExtractPrice` geen prijs oplevert (fout of
+`price: null`), probeert het systeem het opnieuw met een echte headless
+Chromium-browser (Playwright) voordat de check als mislukt wordt
+geregistreerd.
+
+## Architectuur
+
+Nieuwe module `src/browserScraper.js`, losstaand van `src/scraper.js`
+(die blijft ongewijzigd — alle bestaande tests blijven geldig):
+
+- `launchBrowser() -> Promise<Browser>` — start één Chromium-instance
+  (Playwright).
+- `fetchAndExtractPriceViaBrowser(browser, url, { timeoutMs = 20000 }) ->
+  Promise<{ price: number|null, method: string|null, error: Error|null
+  }>` — opent een nieuwe pagina op de meegegeven browser, navigeert naar
+  `url` (timeout `timeoutMs`), leest de gerenderde HTML via
+  `page.content()`, en hergebruikt `extractPrice()` uit `src/scraper.js`
+  (JSON-LD → meta → regex, exact dezelfde tiers) om de prijs eruit te
+  halen. Sluit de pagina altijd (try/finally), nooit de browser zelf.
+
+## Wijziging in `checkProducts.js`
+
+`checkProduct(product, deps)` krijgt een **optionele** extra dependency:
+`deps.fetchAndExtractPriceViaBrowser(url) ->
+Promise<{price,method,error}>` (curried met de browser-instance door de
+composition root — `checkProducts.js` weet niets van Playwright zelf,
+blijft puur dependency-injected zoals nu).
+
+Logica: eerst zoals nu `fetchAndExtractPrice(product.url)` aanroepen. Als
+dat resultaat een `error` heeft **of** `price === null`, én
+`deps.fetchAndExtractPriceViaBrowser` is meegegeven, probeer de fallback
+en gebruik dát resultaat verder (ook als de fallback zelf ook faalt — de
+bestaande classificatie hieronder werkt op wat dan ook het laatste
+resultaat is). **Fallback wordt nooit aangeroepen als de eerste poging al
+een prijs opleverde.**
+
+De rest van de functie (baseline/unchanged/changed+mail/mail_error/
+fetch_error/not_found, en de regel dat `last_price`/`last_checked_at`
+alleen bij een volledig geslaagde check worden bijgewerkt) blijft
+ongewijzigd.
+
+## Lifecycle (in `server.js`)
+
+Eén browser per `runCheck()`-aanroep (zowel de dagelijkse cron als de
+"nu controleren"-knop delen dit patroon, want beide roepen `runCheck()`
+aan) — **lazy**: de browser start pas op het moment dat de eerste
+fallback binnen die run daadwerkelijk nodig is (dus niet als alle
+producten al gewoon ophaalbaar zijn via de normale fetch). Eenmaal
+gestart wordt diezelfde instance hergebruikt voor de rest van die run
+(nieuwe pagina per product), en aan het eind van de run altijd gesloten
+in een `finally` — nooit een browser die de hele dag blijft openstaan, en
+geen onnodige browser-start op runs die 'm niet nodig hebben.
+
+## Docker
+
+De runtime-stage van de Dockerfile installeert Chromium + de benodigde
+systeemlibraries via `npx playwright install --with-deps chromium`, ná
+het kopiëren van de app (zodat de juiste Playwright-versie uit
+`node_modules` gebruikt wordt). `playwright` wordt een production
+dependency (niet dev) zodat `npm ci --omit=dev` in de build-stage 'm wél
+meeneemt naar de runtime-stage. Dit vergroot de image en de build-tijd
+merkbaar (geaccepteerd trade-off, al gecommuniceerd).
+
+## Error handling
+
+- `page.goto` faalt of timet uit (`timeoutMs`, default 20000ms) → fallback
+  retourneert `{price: null, method: null, error}`, exact zelfde vorm als
+  de bestaande `fetchAndExtractPrice`-fouten. Geen crash van de run.
+- Pagina wordt altijd gesloten, ook bij een gooiende `page.goto`
+  (try/finally), zodat er geen paginas/geheugen lekken binnen een run met
+  meerdere fallback-pogingen.
+- Browser wordt altijd gesloten aan het eind van `runCheck()`, ook als er
+  onderweg een fout optreedt (try/finally rond de hele check-run).
+
+## Testing
+
+- `test/browserScraper.test.js`: test tegen een **nep** browser/pagina-
+  object (zelfde dependency-injection-patroon als de rest van de
+  codebase — geen echte Chromium nodig in de testrun): succesvolle
+  extractie, `page.goto` die faalt/timet uit, en dat `page.close()`
+  altijd wordt aangeroepen (ook bij een fout).
+- `test/checkProducts.test.js`: nieuwe tests die bevestigen dat de
+  fallback (a) wordt aangeroepen wanneer de eerste poging faalt, (b)
+  **niet** wordt aangeroepen wanneer de eerste poging al een prijs
+  oplevert, en (c) dat bestaande tests zonder
+  `fetchAndExtractPriceViaBrowser` in de deps ongewijzigd blijven werken
+  (de dependency is optioneel, achterwaarts compatibel).
+- Geen geautomatiseerde test voor de Dockerfile-wijziging zelf — net als
+  bij de oorspronkelijke Dockerfile-taak, een handmatige
+  build+run-verificatie (ditmaal ook een handmatige check dat Chromium
+  daadwerkelijk een pagina kan laden binnen de container).
+
+## Out of scope
+
+- Geen garantie dat dit specifieke Akamai-domein (`iciparisxl.nl`)
+  hierdoor gaat werken — dat hangt af van Akamai's detectie-niveau voor
+  dat domein op dat moment. Dit wordt niet apart getest tegen dat
+  specifieke domein als onderdeel van de geautomatiseerde testsuite (te
+  broos/afhankelijk van een externe, veranderlijke anti-bot-dienst); wel
+  handmatig te proberen na deploy.
+- Playwright-stealth-plugins of andere anti-detectie-technieken — niet
+  gevraagd, voegt complexiteit toe zonder gegarandeerd resultaat.

package-lock.json

@@ -10,10 +10,12 @@
       "dependencies": {
         "better-sqlite3": "^11.3.0",
         "cheerio": "^1.0.0",
+        "dotenv": "^17.4.2",
         "express": "^4.19.2",
         "express-basic-auth": "^1.2.1",
         "node-cron": "^3.0.3",
-        "nodemailer": "^6.9.14"
+        "nodemailer": "^6.9.14",
+        "playwright": "^1.63.0"
       },
       "devDependencies": {
         "supertest": "^7.0.0"
@@ -527,6 +529,18 @@
         "url": "https://github.com/fb55/domutils?sponsor=1"
       }
     },
+    "node_modules/dotenv": {
+      "version": "17.4.2",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-17.4.2.tgz",
+      "integrity": "sha512-nI4U3TottKAcAD9LLud4Cb7b2QztQMUEfHbvhTH09bqXTxnSie8WnjPALV/WMCrJZ6UV/qHJ6L03OqO3LcdYZw==",
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://dotenvx.com"
+      }
+    },
     "node_modules/dunder-proto": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/dunder-proto/-/dunder-proto-1.0.1.tgz",
@@ -1272,6 +1286,33 @@
       "integrity": "sha512-A/AGNMFN3c8bOlvV9RreMdrv7jsmF9XIfDeCd87+I8RNg6s78BhJxMu69NEMHBSJFxKidViTEdruRwEk/WIKqA==",
       "license": "MIT"
     },
+    "node_modules/playwright": {
+      "version": "1.63.0",
+      "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.63.0.tgz",
+      "integrity": "sha512-+7ziBLidS4NaNCdt57SUDT+wYmmd5fmiQejUic/kb+YsYSCPyOOE9sebzMjNmQrsnNpDJqd4WHvV/8lfKfUDUg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright-core": "1.63.0"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/playwright-core": {
+      "version": "1.63.0",
+      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.63.0.tgz",
+      "integrity": "sha512-rYCsBF/M5HjUch52bbtVONEFjv6Xu8sm8h72dNlR5bzIE1fvC/bxgspzkjSfU+MweEMmPM8KJebG6nnyxo5mCg==",
+      "license": "Apache-2.0",
+      "bin": {
+        "playwright-core": "cli.js"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
     "node_modules/prebuild-install": {
       "version": "7.1.3",
       "resolved": "https://registry.npmjs.org/prebuild-install/-/prebuild-install-7.1.3.tgz",

package.json

@@ -11,10 +11,12 @@
   "dependencies": {
     "better-sqlite3": "^11.3.0",
     "cheerio": "^1.0.0",
+    "dotenv": "^17.4.2",
     "express": "^4.19.2",
     "express-basic-auth": "^1.2.1",
     "node-cron": "^3.0.3",
-    "nodemailer": "^6.9.14"
+    "nodemailer": "^6.9.14",
+    "playwright": "^1.63.0"
   },
   "devDependencies": {
     "supertest": "^7.0.0"

server.js

@@ -0,0 +1,108 @@
+// Leest een .env-bestand in voor lokale ontwikkeling; in productie komen de
+// env vars van Coolify. quiet houdt de opstartlogging schoon.
+require('dotenv').config({ quiet: true });
+
+const path = require('node:path');
+const {
+  openDb, listProducts, addProduct, deleteProduct,
+  recordCheckSuccess, recordCheckFailure,
+} = require('./src/db');
+const { fetchAndExtractPrice } = require('./src/scraper');
+const { launchBrowser, fetchAndExtractPriceViaBrowser } = require('./src/browserScraper');
+const { createTransport, sendPriceChangeEmail } = require('./src/mailer');
+const { checkAllProducts } = require('./src/checkProducts');
+const { start: startScheduler } = require('./src/scheduler');
+const { createApp } = require('./src/app');
+
+const REQUIRED_ENV = ['BASIC_AUTH_USER', 'BASIC_AUTH_PASS', 'SMTP_FROM', 'NOTIFY_EMAIL'];
+const missing = REQUIRED_ENV.filter((name) => !process.env[name]);
+if (missing.length > 0) {
+  console.error(`Ontbrekende verplichte environment variables: ${missing.join(', ')}`);
+  console.error('Zet ze (bijvoorbeeld in .env, zie .env.example) en start opnieuw.');
+  process.exit(1);
+}
+
+const PORT = process.env.PORT || 3000;
+const DB_PATH = process.env.DB_PATH || path.join(__dirname, 'data', 'korting.db');
+
+const db = openDb(DB_PATH);
+const transport = createTransport(process.env);
+
+function summarize(results) {
+  const counts = {};
+  for (const result of results) {
+    counts[result.status] = (counts[result.status] || 0) + 1;
+  }
+  const parts = Object.entries(counts).map(([status, count]) => `${status}=${count}`);
+  return parts.length > 0 ? parts.join(' ') : 'geen producten';
+}
+
+let inFlightCheck = null;
+function runCheck() {
+  if (inFlightCheck) {
+    return inFlightCheck;
+  }
+  inFlightCheck = runCheckOnce().finally(() => {
+    inFlightCheck = null;
+  });
+  return inFlightCheck;
+}
+
+async function runCheckOnce() {
+  const products = listProducts(db);
+  let browserPromise = null;
+  function getBrowser() {
+    if (!browserPromise) {
+      browserPromise = launchBrowser();
+    }
+    return browserPromise;
+  }
+  try {
+    const deps = {
+      fetchAndExtractPrice,
+      fetchAndExtractPriceViaBrowser: async (url) => {
+        try {
+          const browser = await getBrowser();
+          return await fetchAndExtractPriceViaBrowser(browser, url);
+        } catch (err) {
+          return { price: null, method: null, error: err };
+        }
+      },
+      sendMail: (payload) => sendPriceChangeEmail(transport, {
+        from: process.env.SMTP_FROM,
+        to: process.env.NOTIFY_EMAIL,
+        ...payload,
+      }),
+      recordCheckFailure: (id, status) => recordCheckFailure(db, id, status),
+      recordCheckSuccess: (id, data) => recordCheckSuccess(db, id, data),
+      now: () => new Date().toISOString(),
+    };
+    const results = await checkAllProducts(products, deps);
+    console.log(`[check] ${products.length} product(en) gecontroleerd: ${summarize(results)}`);
+    return results;
+  } finally {
+    if (browserPromise) {
+      const browser = await browserPromise.catch(() => null);
+      if (browser) {
+        await browser.close().catch((err) => {
+          console.error(`[check] kon de browser niet netjes sluiten: ${err && err.message}`);
+        });
+      }
+    }
+  }
+}
+
+startScheduler(runCheck);
+
+const app = createApp({
+  listProducts: () => listProducts(db),
+  addProduct: (data) => addProduct(db, data),
+  deleteProduct: (id) => deleteProduct(db, id),
+  checkAllProducts: runCheck,
+  authUser: process.env.BASIC_AUTH_USER,
+  authPass: process.env.BASIC_AUTH_PASS,
+});
+
+app.listen(PORT, () => {
+  console.log(`Korting draait op poort ${PORT}`);
+});

src/app.js

@@ -0,0 +1,50 @@
+const express = require('express');
+const basicAuth = require('express-basic-auth');
+const { renderIndex } = require('./views');
+
+function createApp(deps) {
+  const {
+    listProducts, addProduct, deleteProduct,
+    checkAllProducts, authUser, authPass,
+  } = deps;
+
+  const app = express();
+  app.use(express.urlencoded({ extended: false }));
+  app.use(basicAuth({ users: { [authUser]: authPass }, challenge: true }));
+
+  app.get('/', (req, res) => {
+    const products = listProducts();
+    const message = req.query.checked ? 'Controle uitgevoerd.' : undefined;
+    res.send(renderIndex({ products, message }));
+  });
+
+  app.post('/products', (req, res) => {
+    const { name, url } = req.body;
+    if (name && url) {
+      addProduct({ name, url });
+    }
+    res.redirect('/');
+  });
+
+  app.post('/products/:id/delete', (req, res) => {
+    deleteProduct(Number(req.params.id));
+    res.redirect('/');
+  });
+
+  // Express 4 vangt een afgewezen promise uit een async handler niet af, en
+  // Node 22 laat het proces daarop crashen — dus zelf afvangen.
+  app.post('/check-now', async (req, res) => {
+    try {
+      const products = listProducts();
+      await checkAllProducts(products);
+      res.redirect('/?checked=1');
+    } catch (err) {
+      console.error(`[check-now] mislukt: ${err && err.message}`);
+      res.status(500).send('Er ging iets mis bij het controleren van de prijzen.');
+    }
+  });
+
+  return app;
+}
+
+module.exports = { createApp };

src/browserScraper.js

@@ -0,0 +1,25 @@
+const { chromium } = require('playwright');
+const { extractPrice } = require('./scraper');
+
+async function launchBrowser() {
+  return chromium.launch({ headless: true });
+}
+
+async function fetchAndExtractPriceViaBrowser(browser, url, { timeoutMs = 20000 } = {}) {
+  let page;
+  try {
+    page = await browser.newPage();
+    await page.goto(url, { waitUntil: 'domcontentloaded', timeout: timeoutMs });
+    const html = await page.content();
+    const { price, method } = extractPrice(html);
+    return { price, method, error: null };
+  } catch (err) {
+    return { price: null, method: null, error: err };
+  } finally {
+    if (page) {
+      await page.close().catch(() => {});
+    }
+  }
+}
+
+module.exports = { launchBrowser, fetchAndExtractPriceViaBrowser };

src/checkProducts.js

@@ -0,0 +1,59 @@
+async function checkProduct(product, deps) {
+  const {
+    fetchAndExtractPrice, fetchAndExtractPriceViaBrowser,
+    sendMail, recordCheckSuccess, recordCheckFailure, now,
+  } = deps;
+  let result = await fetchAndExtractPrice(product.url);
+
+  if ((result.error || result.price == null) && fetchAndExtractPriceViaBrowser) {
+    result = await fetchAndExtractPriceViaBrowser(product.url);
+  }
+
+  if (result.error) {
+    console.error(`[check] fetch_error "${product.name}" (${product.url}): ${result.error.message}`);
+    recordCheckFailure(product.id, 'fetch_error');
+    return { status: 'fetch_error' };
+  }
+  if (result.price == null) {
+    console.error(`[check] not_found "${product.name}" (${product.url}): geen prijs gevonden op de pagina`);
+    recordCheckFailure(product.id, 'not_found');
+    return { status: 'not_found' };
+  }
+
+  const isBaseline = product.last_price == null;
+  const changed = !isBaseline && result.price !== product.last_price;
+
+  if (changed) {
+    try {
+      await sendMail({
+        name: product.name,
+        url: product.url,
+        oldPrice: product.last_price,
+        newPrice: result.price,
+      });
+    } catch (err) {
+      console.error(`[check] mail_error "${product.name}" (${product.url}): ${err && err.message}`);
+      recordCheckFailure(product.id, 'mail_error');
+      return { status: 'mail_error' };
+    }
+  }
+
+  recordCheckSuccess(product.id, { price: result.price, checkedAt: now() });
+  return { status: 'ok', changed };
+}
+
+async function checkAllProducts(products, deps) {
+  const results = [];
+  for (const product of products) {
+    try {
+      const result = await checkProduct(product, deps);
+      results.push({ productId: product.id, ...result });
+    } catch (err) {
+      console.error(`[check] error "${product.name}" (${product.url}): ${err && err.message}`);
+      results.push({ productId: product.id, status: 'error', error: err });
+    }
+  }
+  return results;
+}
+
+module.exports = { checkProduct, checkAllProducts };

src/scheduler.js

@@ -0,0 +1,10 @@
+const cronDefault = require('node-cron');
+
+const SCHEDULE = '0 8 * * *';
+const TIMEZONE = 'Europe/Amsterdam';
+
+function start(runCheck, { cron = cronDefault } = {}) {
+  return cron.schedule(SCHEDULE, runCheck, { timezone: TIMEZONE });
+}
+
+module.exports = { start, SCHEDULE, TIMEZONE };

src/scraper.js

@@ -4,10 +4,32 @@ function roundMoney(n) {
   return Math.round(n * 100) / 100;
 }
 
-function parsePriceValue(raw) {
+// Turns a human-written amount into a plain JS-parsable number string.
+// When both separators occur, the last one is the decimal separator
+// ("1.299,00" and "1,299.00" both mean 1299.00); a lone comma is decimal
+// only when exactly two digits follow it, otherwise it groups thousands.
+function normalizeAmount(raw) {
   if (raw == null) return null;
-  const cleaned = String(raw).trim().replace(',', '.');
+  const match = String(raw).trim().match(/-?\d[\d.,]*/);
-  const value = parseFloat(cleaned);
+  if (!match) return null;
+  const str = match[0].replace(/[.,]+$/, '');
+  const lastDot = str.lastIndexOf('.');
+  const lastComma = str.lastIndexOf(',');
+  if (lastDot !== -1 && lastComma !== -1) {
+    return lastComma > lastDot
+      ? str.replace(/\./g, '').replace(',', '.')
+      : str.replace(/,/g, '');
+  }
+  if (lastComma !== -1) {
+    return /,\d{2}$/.test(str) ? str.replace(',', '.') : str.replace(/,/g, '');
+  }
+  return str;
+}
+
+function parsePriceValue(raw) {
+  const normalized = normalizeAmount(raw);
+  if (normalized == null) return null;
+  const value = parseFloat(normalized);
   return Number.isFinite(value) ? roundMoney(value) : null;
 }
 
@@ -59,9 +81,14 @@ function findPriceInMeta($) {
   return null;
 }
 
+// Thousands-grouped amounts first, then a plain amount, so "€1.299,00"
+// is not truncated to "€1.29".
+const TEXT_PRICE_RE = /€\s?(\d{1,3}(?:[.,]\d{3})+[.,]\d{2}|\d+[.,]\d{2})/;
+
 function findPriceInText($) {
-  const text = $('body').text();
+  const text = $('body').clone().find('script, style, noscript').remove().end()
-  const match = text.match(/€\s?(\d+[.,]\d{2})/);
+    .text();
+  const match = text.match(TEXT_PRICE_RE);
   return match ? parsePriceValue(match[1]) : null;
 }
 
@@ -76,7 +103,18 @@ function extractPrice(html) {
   return { price: null, method: null };
 }
 
-async function fetchAndExtractPrice(url, { fetchImpl = fetch } = {}) {
+const FETCH_TIMEOUT_MS = 15000;
+const USER_AGENT = 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 '
+  + '(KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36';
+
+function defaultFetch(url) {
+  return fetch(url, {
+    signal: AbortSignal.timeout(FETCH_TIMEOUT_MS),
+    headers: { 'User-Agent': USER_AGENT },
+  });
+}
+
+async function fetchAndExtractPrice(url, { fetchImpl = defaultFetch } = {}) {
   let response;
   try {
     response = await fetchImpl(url);

src/views.js

@@ -0,0 +1,63 @@
+function escapeHtml(str) {
+  return String(str).replace(/[&<>"']/g, (c) => ({
+    '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;',
+  }[c]));
+}
+
+function formatPrice(price) {
+  return price == null ? '—' : `€${Number(price).toFixed(2).replace('.', ',')}`;
+}
+
+function renderProductRow(product) {
+  return `
+    <tr>
+      <td>${escapeHtml(product.name)}</td>
+      <td><a href="${escapeHtml(product.url)}" target="_blank" rel="noopener">bekijken</a></td>
+      <td>${formatPrice(product.last_price)}</td>
+      <td>${product.last_checked_at ? escapeHtml(product.last_checked_at) : '—'}</td>
+      <td>${escapeHtml(product.last_check_status || '—')}</td>
+      <td>
+        <form method="post" action="/products/${product.id}/delete" onsubmit="return confirm('Product verwijderen?');">
+          <button type="submit">Verwijder</button>
+        </form>
+      </td>
+    </tr>`;
+}
+
+function renderIndex({ products, message }) {
+  return `<!doctype html>
+<html lang="nl">
+<head>
+  <meta charset="utf-8">
+  <title>Korting — prijstracker</title>
+  <style>
+    body { font-family: system-ui, sans-serif; max-width: 800px; margin: 2rem auto; padding: 0 1rem; }
+    table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
+    th, td { text-align: left; padding: 0.5rem; border-bottom: 1px solid #ddd; }
+    .message { background: #eef; padding: 0.5rem 1rem; border-radius: 4px; }
+  </style>
+</head>
+<body>
+  <h1>Korting — prijstracker</h1>
+  ${message ? `<p class="message">${escapeHtml(message)}</p>` : ''}
+  <form method="post" action="/products">
+    <input name="name" placeholder="Naam" required>
+    <input name="url" type="url" placeholder="https://..." required>
+    <button type="submit">Toevoegen</button>
+  </form>
+  <form method="post" action="/check-now">
+    <button type="submit">Nu controleren</button>
+  </form>
+  <table>
+    <thead>
+      <tr><th>Naam</th><th>URL</th><th>Prijs</th><th>Laatst gecontroleerd</th><th>Status</th><th></th></tr>
+    </thead>
+    <tbody>
+      ${products.map(renderProductRow).join('')}
+    </tbody>
+  </table>
+</body>
+</html>`;
+}
+
+module.exports = { renderIndex, escapeHtml, formatPrice };

test/app.test.js

@@ -0,0 +1,87 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const request = require('supertest');
+const { createApp } = require('../src/app');
+
+function makeDeps(overrides = {}) {
+  let products = [];
+  let nextId = 1;
+  return {
+    listProducts: () => products,
+    addProduct: ({ name, url }) => {
+      const product = { id: nextId++, name, url, last_price: null, last_checked_at: null, last_check_status: null };
+      products.push(product);
+      return product;
+    },
+    deleteProduct: (id) => { products = products.filter((p) => p.id !== id); },
+    checkAllProducts: async () => [],
+    authUser: 'admin',
+    authPass: 'secret',
+    ...overrides,
+  };
+}
+
+test('rejects requests without basic auth credentials', async () => {
+  const app = createApp(makeDeps());
+  const res = await request(app).get('/');
+  assert.equal(res.status, 401);
+});
+
+test('lists products for authenticated requests', async () => {
+  const deps = makeDeps();
+  deps.addProduct({ name: 'Voorbeeld', url: 'https://example.com' });
+  const app = createApp(deps);
+  const res = await request(app).get('/').auth('admin', 'secret');
+  assert.equal(res.status, 200);
+  assert.match(res.text, /Voorbeeld/);
+});
+
+test('adding a product redirects to the list', async () => {
+  const deps = makeDeps();
+  const app = createApp(deps);
+  const res = await request(app)
+    .post('/products')
+    .auth('admin', 'secret')
+    .type('form')
+    .send({ name: 'Nieuw product', url: 'https://shop.example/p' });
+  assert.equal(res.status, 302);
+  assert.equal(res.headers.location, '/');
+  const list = await request(app).get('/').auth('admin', 'secret');
+  assert.match(list.text, /Nieuw product/);
+});
+
+test('deleting a product removes it from the list', async () => {
+  const deps = makeDeps();
+  const product = deps.addProduct({ name: 'Weg ermee', url: 'https://shop.example/p2' });
+  const app = createApp(deps);
+  const res = await request(app).post(`/products/${product.id}/delete`).auth('admin', 'secret');
+  assert.equal(res.status, 302);
+  const list = await request(app).get('/').auth('admin', 'secret');
+  assert.doesNotMatch(list.text, /Weg ermee/);
+});
+
+test('check-now triggers checkAllProducts and redirects with confirmation', async () => {
+  let called = false;
+  const deps = makeDeps({ checkAllProducts: async () => { called = true; return []; } });
+  const app = createApp(deps);
+  const res = await request(app).post('/check-now').auth('admin', 'secret');
+  assert.equal(res.status, 302);
+  assert.equal(res.headers.location, '/?checked=1');
+  assert.equal(called, true);
+});
+
+test('check-now answers 500 when the check fails, without crashing the process', async (t) => {
+  t.mock.method(console, 'error', () => {});
+  const deps = makeDeps({
+    checkAllProducts: async () => { throw new Error('db weg'); },
+  });
+  deps.addProduct({ name: 'Nog steeds hier', url: 'https://shop.example/p3' });
+  const app = createApp(deps);
+  const res = await request(app).post('/check-now').auth('admin', 'secret');
+  assert.equal(res.status, 500);
+  assert.match(res.text, /Er ging iets mis/);
+  // Same process, same app instance: proves nothing crashed.
+  const list = await request(app).get('/').auth('admin', 'secret');
+  assert.equal(list.status, 200);
+  assert.match(list.text, /Nog steeds hier/);
+});

test/browserScraper.test.js

@@ -0,0 +1,70 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const { fetchAndExtractPriceViaBrowser } = require('../src/browserScraper');
+
+test('fetchAndExtractPriceViaBrowser extracts a price from the rendered page', async () => {
+  let closed = false;
+  const html = '<html><head><meta property="og:price:amount" content="42.00" /></head><body></body></html>';
+  const page = {
+    goto: async () => {},
+    content: async () => html,
+    close: async () => { closed = true; },
+  };
+  const browser = { newPage: async () => page };
+  const result = await fetchAndExtractPriceViaBrowser(browser, 'https://example.com');
+  assert.deepEqual(result, { price: 42, method: 'meta', error: null });
+  assert.equal(closed, true);
+});
+
+test('fetchAndExtractPriceViaBrowser returns an error when navigation fails, and still closes the page', async () => {
+  let closed = false;
+  const page = {
+    goto: async () => { throw new Error('Timeout 20000ms exceeded'); },
+    content: async () => '',
+    close: async () => { closed = true; },
+  };
+  const browser = { newPage: async () => page };
+  const result = await fetchAndExtractPriceViaBrowser(browser, 'https://example.com');
+  assert.equal(result.price, null);
+  assert.equal(result.method, null);
+  assert.ok(result.error instanceof Error);
+  assert.equal(closed, true);
+});
+
+test('fetchAndExtractPriceViaBrowser returns null price when nothing matches, and still closes the page', async () => {
+  let closed = false;
+  const page = {
+    goto: async () => {},
+    content: async () => '<html><body><p>Geen prijs</p></body></html>',
+    close: async () => { closed = true; },
+  };
+  const browser = { newPage: async () => page };
+  const result = await fetchAndExtractPriceViaBrowser(browser, 'https://example.com');
+  assert.deepEqual(result, { price: null, method: null, error: null });
+  assert.equal(closed, true);
+});
+
+test('fetchAndExtractPriceViaBrowser closes the page even if reading its content throws', async () => {
+  let closed = false;
+  const page = {
+    goto: async () => {},
+    content: async () => { throw new Error('content failed'); },
+    close: async () => { closed = true; },
+  };
+  const browser = { newPage: async () => page };
+  const result = await fetchAndExtractPriceViaBrowser(browser, 'https://example.com');
+  assert.ok(result.error instanceof Error);
+  assert.equal(closed, true);
+});
+
+test('fetchAndExtractPriceViaBrowser passes the timeout option through to page.goto', async () => {
+  let receivedOptions;
+  const page = {
+    goto: async (url, options) => { receivedOptions = options; },
+    content: async () => '<html><body></body></html>',
+    close: async () => {},
+  };
+  const browser = { newPage: async () => page };
+  await fetchAndExtractPriceViaBrowser(browser, 'https://example.com', { timeoutMs: 5000 });
+  assert.equal(receivedOptions.timeout, 5000);
+});

test/checkProducts.test.js

@@ -0,0 +1,184 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const { checkProduct, checkAllProducts } = require('../src/checkProducts');
+
+function makeDeps(overrides = {}) {
+  const failures = [];
+  const successes = [];
+  const mailCalls = [];
+  const deps = {
+    fetchAndExtractPrice: async () => ({ price: 10, method: 'meta', error: null }),
+    sendMail: async (payload) => { mailCalls.push(payload); },
+    recordCheckFailure: (id, status) => failures.push({ id, status }),
+    recordCheckSuccess: (id, data) => successes.push({ id, ...data }),
+    now: () => '2026-09-05T08:00:00.000Z',
+    ...overrides,
+  };
+  return { deps, failures, successes, mailCalls };
+}
+
+// Failure paths log to stderr; capture it so the test output stays clean
+// while still proving the logging happened.
+function captureErrorLog(t) {
+  const logged = [];
+  t.mock.method(console, 'error', (...args) => { logged.push(args.join(' ')); });
+  return logged;
+}
+
+test('checkProduct stores baseline price without sending mail', async () => {
+  const { deps, successes, mailCalls } = makeDeps();
+  const product = { id: 1, name: 'X', url: 'https://x', last_price: null };
+  const result = await checkProduct(product, deps);
+  assert.equal(result.status, 'ok');
+  assert.equal(result.changed, false);
+  assert.equal(mailCalls.length, 0);
+  assert.deepEqual(successes, [{ id: 1, price: 10, checkedAt: '2026-09-05T08:00:00.000Z' }]);
+});
+
+test('checkProduct sends mail and updates price when price changed', async () => {
+  const { deps, successes, mailCalls } = makeDeps();
+  const product = { id: 2, name: 'X', url: 'https://x', last_price: 15 };
+  const result = await checkProduct(product, deps);
+  assert.equal(result.status, 'ok');
+  assert.equal(result.changed, true);
+  assert.equal(mailCalls.length, 1);
+  assert.deepEqual(mailCalls[0], { name: 'X', url: 'https://x', oldPrice: 15, newPrice: 10 });
+  assert.equal(successes.length, 1);
+});
+
+test('checkProduct does not send mail or update when price unchanged', async () => {
+  const { deps, successes, mailCalls } = makeDeps();
+  const product = { id: 3, name: 'X', url: 'https://x', last_price: 10 };
+  const result = await checkProduct(product, deps);
+  assert.equal(result.status, 'ok');
+  assert.equal(result.changed, false);
+  assert.equal(mailCalls.length, 0);
+  assert.equal(successes.length, 1);
+});
+
+test('checkProduct records fetch_error and does not touch price on network failure', async (t) => {
+  const logged = captureErrorLog(t);
+  const { deps, failures, successes } = makeDeps({
+    fetchAndExtractPrice: async () => ({ price: null, method: null, error: new Error('down') }),
+  });
+  const product = { id: 4, name: 'X', url: 'https://x', last_price: 10 };
+  const result = await checkProduct(product, deps);
+  assert.equal(result.status, 'fetch_error');
+  assert.deepEqual(failures, [{ id: 4, status: 'fetch_error' }]);
+  assert.equal(successes.length, 0);
+  assert.equal(logged.length, 1);
+  assert.match(logged[0], /fetch_error.*https:\/\/x.*down/);
+});
+
+test('checkProduct records not_found when no price could be extracted', async (t) => {
+  const logged = captureErrorLog(t);
+  const { deps, failures, successes } = makeDeps({
+    fetchAndExtractPrice: async () => ({ price: null, method: null, error: null }),
+  });
+  const product = { id: 5, name: 'X', url: 'https://x', last_price: 10 };
+  const result = await checkProduct(product, deps);
+  assert.equal(result.status, 'not_found');
+  assert.deepEqual(failures, [{ id: 5, status: 'not_found' }]);
+  assert.equal(successes.length, 0);
+  assert.equal(logged.length, 1);
+  assert.match(logged[0], /not_found.*https:\/\/x/);
+});
+
+test('checkProduct records mail_error and keeps old price when sending mail fails', async (t) => {
+  const logged = captureErrorLog(t);
+  const { deps, failures, successes } = makeDeps({
+    sendMail: async () => { throw new Error('smtp down'); },
+  });
+  const product = { id: 6, name: 'X', url: 'https://x', last_price: 15 };
+  const result = await checkProduct(product, deps);
+  assert.equal(result.status, 'mail_error');
+  assert.deepEqual(failures, [{ id: 6, status: 'mail_error' }]);
+  assert.equal(successes.length, 0);
+  assert.equal(logged.length, 1);
+  assert.match(logged[0], /mail_error.*https:\/\/x.*smtp down/);
+});
+
+test('checkAllProducts processes every product independently, isolating failures', async (t) => {
+  captureErrorLog(t);
+  const { deps } = makeDeps();
+  let calls = 0;
+  const throwingDeps = {
+    ...deps,
+    fetchAndExtractPrice: async () => {
+      calls += 1;
+      if (calls === 1) throw new Error('boom');
+      return { price: 10, method: 'meta', error: null };
+    },
+  };
+  const products = [
+    { id: 1, name: 'A', url: 'https://a', last_price: null },
+    { id: 2, name: 'B', url: 'https://b', last_price: null },
+  ];
+  const results = await checkAllProducts(products, throwingDeps);
+  assert.equal(results.length, 2);
+  assert.equal(results[0].status, 'error');
+  assert.equal(results[1].status, 'ok');
+});
+
+test('checkProduct tries the browser fallback when the primary fetch errors, and uses its result', async (t) => {
+  captureErrorLog(t);
+  const browserCalls = [];
+  const { deps, successes, mailCalls } = makeDeps({
+    fetchAndExtractPrice: async () => ({ price: null, method: null, error: new Error('down') }),
+    fetchAndExtractPriceViaBrowser: async (url) => {
+      browserCalls.push(url);
+      return { price: 10, method: 'json-ld', error: null };
+    },
+  });
+  const product = { id: 7, name: 'X', url: 'https://x', last_price: null };
+  const result = await checkProduct(product, deps);
+  assert.equal(result.status, 'ok');
+  assert.deepEqual(browserCalls, ['https://x']);
+  assert.equal(successes.length, 1);
+  assert.equal(mailCalls.length, 0);
+});
+
+test('checkProduct tries the browser fallback when the primary fetch finds no price', async (t) => {
+  captureErrorLog(t);
+  const browserCalls = [];
+  const { deps, successes } = makeDeps({
+    fetchAndExtractPrice: async () => ({ price: null, method: null, error: null }),
+    fetchAndExtractPriceViaBrowser: async (url) => {
+      browserCalls.push(url);
+      return { price: 12, method: 'regex', error: null };
+    },
+  });
+  const product = { id: 8, name: 'X', url: 'https://x', last_price: null };
+  const result = await checkProduct(product, deps);
+  assert.equal(result.status, 'ok');
+  assert.deepEqual(browserCalls, ['https://x']);
+  assert.equal(successes.length, 1);
+});
+
+test('checkProduct never calls the browser fallback when the primary fetch already succeeds', async () => {
+  const browserCalls = [];
+  const { deps } = makeDeps({
+    fetchAndExtractPriceViaBrowser: async (url) => {
+      browserCalls.push(url);
+      return { price: 999, method: 'meta', error: null };
+    },
+  });
+  const product = { id: 9, name: 'X', url: 'https://x', last_price: null };
+  await checkProduct(product, deps);
+  assert.equal(browserCalls.length, 0);
+});
+
+test('checkProduct records fetch_error when both the primary fetch and the browser fallback fail', async (t) => {
+  const logged = captureErrorLog(t);
+  const { deps, failures, successes } = makeDeps({
+    fetchAndExtractPrice: async () => ({ price: null, method: null, error: new Error('down') }),
+    fetchAndExtractPriceViaBrowser: async () => ({ price: null, method: null, error: new Error('still down') }),
+  });
+  const product = { id: 10, name: 'X', url: 'https://x', last_price: 10 };
+  const result = await checkProduct(product, deps);
+  assert.equal(result.status, 'fetch_error');
+  assert.deepEqual(failures, [{ id: 10, status: 'fetch_error' }]);
+  assert.equal(successes.length, 0);
+  assert.equal(logged.length, 1);
+  assert.match(logged[0], /fetch_error.*still down/);
+});

test/fixtures/script-decoy.html

@@ -0,0 +1,5 @@
+<html><body>
+<script>var config = {"fallbackPrice": "€9,99"};</script>
+<style>.price:after { content: "€1,11"; }</style>
+<p>Onze prijs: &euro;49,95 vandaag</p>
+</body></html>

test/fixtures/thousands-meta.html

@@ -0,0 +1,3 @@
+<html><head>
+<meta property="product:price:amount" content="1.299,00" />
+</head><body><p>Duur product</p></body></html>

test/fixtures/thousands-regex.html

@@ -0,0 +1 @@
+<html><body><p>Nu voor &euro;1.299,00 incl. btw</p></body></html>

test/scheduler.test.js

@@ -0,0 +1,21 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const { start, SCHEDULE, TIMEZONE } = require('../src/scheduler');
+
+test('start schedules the daily check with the expected cron expression and timezone', () => {
+  const calls = [];
+  const fakeCron = {
+    schedule: (expression, fn, options) => {
+      calls.push({ expression, fn, options });
+      return { stop: () => {} };
+    },
+  };
+  const runCheck = async () => {};
+  start(runCheck, { cron: fakeCron });
+  assert.equal(calls.length, 1);
+  assert.equal(calls[0].expression, SCHEDULE);
+  assert.equal(SCHEDULE, '0 8 * * *');
+  assert.equal(calls[0].options.timezone, TIMEZONE);
+  assert.equal(TIMEZONE, 'Europe/Amsterdam');
+  assert.equal(calls[0].fn, runCheck);
+});

test/scraper.test.js

@@ -2,7 +2,7 @@ const test = require('node:test');
 const assert = require('node:assert/strict');
 const fs = require('node:fs');
 const path = require('node:path');
-const { extractPrice, fetchAndExtractPrice } = require('../src/scraper');
+const { extractPrice, fetchAndExtractPrice, parsePriceValue } = require('../src/scraper');
 
 function loadFixture(name) {
   return fs.readFileSync(path.join(__dirname, 'fixtures', name), 'utf8');
@@ -28,6 +28,31 @@ test('extractPrice returns null price when nothing matches', () => {
   assert.deepEqual(result, { price: null, method: null });
 });
 
+test('parsePriceValue handles both thousands-separator conventions', () => {
+  assert.equal(parsePriceValue('1.299,00'), 1299.00);
+  assert.equal(parsePriceValue('1,299.00'), 1299.00);
+  assert.equal(parsePriceValue('19,99'), 19.99);
+  assert.equal(parsePriceValue('19.99'), 19.99);
+  assert.equal(parsePriceValue('1.234.567,89'), 1234567.89);
+  assert.equal(parsePriceValue(null), null);
+  assert.equal(parsePriceValue('geen prijs'), null);
+});
+
+test('extractPrice reads a thousands-grouped price from a meta tag', () => {
+  const result = extractPrice(loadFixture('thousands-meta.html'));
+  assert.deepEqual(result, { price: 1299.00, method: 'meta' });
+});
+
+test('extractPrice reads a thousands-grouped price from page text', () => {
+  const result = extractPrice(loadFixture('thousands-regex.html'));
+  assert.deepEqual(result, { price: 1299.00, method: 'regex' });
+});
+
+test('extractPrice ignores euro amounts inside script and style tags', () => {
+  const result = extractPrice(loadFixture('script-decoy.html'));
+  assert.deepEqual(result, { price: 49.95, method: 'regex' });
+});
+
 test('fetchAndExtractPrice returns error when fetch rejects', async () => {
   const fetchImpl = async () => { throw new Error('network down'); };
   const result = await fetchAndExtractPrice('https://example.invalid', { fetchImpl });
@@ -42,6 +67,19 @@ test('fetchAndExtractPrice returns error on non-OK response', async () => {
   assert.ok(result.error instanceof Error);
 });
 
+test('fetchAndExtractPrice returns error when the request times out', async () => {
+  const fetchImpl = async () => {
+    const err = new Error('The operation was aborted due to timeout');
+    err.name = 'TimeoutError';
+    throw err;
+  };
+  const result = await fetchAndExtractPrice('https://example.invalid', { fetchImpl });
+  assert.deepEqual(result.price, null);
+  assert.equal(result.method, null);
+  assert.ok(result.error instanceof Error);
+  assert.equal(result.error.name, 'TimeoutError');
+});
+
 test('fetchAndExtractPrice extracts price from fetched HTML', async () => {
   const html = loadFixture('meta-tag.html');
   const fetchImpl = async () => ({ ok: true, status: 200, text: async () => html });