evernote-webhooks-events

# Evernote Webhooks & Events ## Overview Implement Evernote webhook notifications for real-time change detection. Evernote webhooks notify your endpoint that changes occurred, but you must use the sync API to retrieve the actual changed data. ## Prerequisites - Evernote API key with webhook permissions - HTTPS endpoint accessible from the internet - Understanding of Evernote sync API ## Instructions ### Step 1: Webhook Endpoint Create an Express endpoint that receives webhook POST requests. Evernote sends `userId`, `guid` (notebook GUID), and `reason` (create, update, notebook) as query parameters. Respond with HTTP 200 immediately, then process asynchronously. ```javascript app.post('/evernote/webhook', (req, res) => { const { userId, guid, reason } = req.query; res.sendStatus(200); // Respond immediately // Process asynchronously processWebhook({ userId, notebookGuid: guid, reason }) .catch(err => console.error('Webhook processing failed:', err)); }); ``` ### Step 2: Webhook Reasons Handle three webhook reasons: `create` (new note created), `update` (note modified), and `notebook` (notebook-level change). Each triggers a sync of the affected notebook. ### Step 3: Sync State Management Store the last sync USN per user. On webhook receipt, call `getSyncState()` to get the current server USN, then `getFilteredSyncChunk()` to fetch only the changes since your last sync. ```javascript const syncState = await noteStore.getSyncState(); const chunk = await n...