backend(oauth): persist oauth tokens and add Google Calendar demo endpoint

modern/backend/app.py

@@ -3,6 +3,8 @@ from fastapi.middleware.cors import CORSMiddleware
 from . import models
 from .oauth import router as oauth_router
 import os
+import requests
+import time
 
 app = FastAPI(title='LifeRPG Modern Backend')
 
@@ -41,3 +43,25 @@ def create_user(payload: dict):
     db.refresh(user)
     db.close()
     return {'id': user.id, 'email': user.email}
+
+
+@app.get('/api/v1/integrations/{integration_id}/google/events')
+def google_events(integration_id: int):
+    """Demo endpoint: fetch upcoming Google Calendar events using stored access token.
+
+    Note: For production you must handle token refresh, errors, and rate limits. This is a demo.
+    """
+    db = models.SessionLocal()
+    try:
+        token = db.query(models.OAuthToken).filter_by(integration_id=integration_id).order_by(models.OAuthToken.id.desc()).first()
+        if not token or not token.access_token:
+            raise HTTPException(status_code=404, detail='no token found for integration')
+
+        headers = {'Authorization': f'Bearer {token.access_token}'}
+        params = {'maxResults': 10, 'singleEvents': True, 'orderBy': 'startTime', 'timeMin': time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime())}
+        resp = requests.get('https://www.googleapis.com/calendar/v3/calendars/primary/events', headers=headers, params=params, timeout=10)
+        if resp.status_code != 200:
+            raise HTTPException(status_code=502, detail=f'google api error: {resp.status_code}')
+        return resp.json()
+    finally:
+        db.close()