Add session cookie for browser-isolated OAuth sessions

soleprint/artery/veins/google/api/routes.py

@@ -2,14 +2,54 @@
 API routes for Google vein.
 """
 
+import json
+import secrets
+from pathlib import Path
 from typing import Optional
 
-from fastapi import APIRouter, HTTPException, Query
+from fastapi import APIRouter, Cookie, HTTPException, Query, Request, Response
 from fastapi.responses import PlainTextResponse, RedirectResponse
 
 # Import shared OAuth utilities from veins parent
 from oauth import TokenStorage
 
+SESSION_COOKIE = "spr_session"
+
+
+def _load_auth_config():
+    """Load auth config from room config.json."""
+    config_path = Path("/app/cfg/config.json")
+    if not config_path.exists():
+        return {}
+    try:
+        with open(config_path) as f:
+            config = json.load(f)
+        return config.get("auth", {})
+    except Exception:
+        return {}
+
+
+def _is_user_allowed(email: str, domain: str) -> bool:
+    """Check if user is allowed based on auth config."""
+    auth = _load_auth_config()
+    allowed_domains = auth.get("allowed_domains", [])
+    allowed_emails = auth.get("allowed_emails", [])
+
+    # No restrictions = allow all
+    if not allowed_domains and not allowed_emails:
+        return True
+
+    # Check email list
+    if email in allowed_emails:
+        return True
+
+    # Check domain list
+    if domain and domain in allowed_domains:
+        return True
+
+    return False
+
+
 from ..core.oauth import GoogleOAuth
 from ..core.sheets import GoogleSheetsClient, GoogleSheetsError
 from ..models.formatter import format_sheet_values, format_spreadsheet_metadata
@@ -124,6 +164,7 @@ async def start_oauth(
 
 @router.get("/oauth/callback")
 async def oauth_callback(
+    request: Request,
     code: Optional[str] = None,
     state: Optional[str] = None,
     error: Optional[str] = None,
@@ -136,29 +177,59 @@ async def oauth_callback(
         raise HTTPException(400, "Missing authorization code")
 
     # Extract redirect URL from state if present
-    # Format: "csrf_state|redirect_url" OR just "redirect_url" if no csrf state
+    # Format: "csrf_state|redirect_url" OR just "redirect_url" (path starting with /)
     redirect_url = None
     if state:
         if "|" in state:
             parts = state.split("|", 1)
             redirect_url = parts[1] if len(parts) > 1 else None
-        elif state.startswith("http"):
-            # No csrf state, just the redirect URL
+        else:
+            # No separator, state is the redirect URL itself
             redirect_url = state
 
     try:
-        tokens = oauth_client.exchange_code_for_tokens(code)
-        token_storage.save_tokens(DEFAULT_USER_ID, tokens)
+        # First get user info to validate before storing tokens
+        user_info = oauth_client.exchange_code_for_user(code)
+        user_email = user_info.get("email", "")
+        user_domain = user_info.get("hd", "")  # hosted domain (for Google Workspace)
 
-        # Redirect back to original page if specified
-        if redirect_url:
-            return RedirectResponse(url=redirect_url)
+        # Check if user is allowed
+        if not _is_user_allowed(user_email, user_domain):
+            raise HTTPException(
+                403,
+                f"Access restricted. Your account ({user_email}) is not authorized.",
+            )
 
-        return {
-            "status": "ok",
-            "message": "Successfully authenticated with Google",
-            "user": DEFAULT_USER_ID,
+        # Generate session ID for this browser
+        session_id = secrets.token_urlsafe(32)
+
+        # Store tokens with session ID
+        tokens = {
+            "access_token": user_info.get("access_token", ""),
+            "refresh_token": user_info.get("refresh_token", ""),
+            "token_type": "Bearer",
+            "email": user_email,
         }
+        if tokens["access_token"]:
+            token_storage.save_tokens(session_id, tokens)
+
+        # Create response with session cookie
+        if redirect_url:
+            response = RedirectResponse(url=redirect_url)
+        else:
+            response = RedirectResponse(url="/")
+
+        response.set_cookie(
+            key=SESSION_COOKIE,
+            value=session_id,
+            httponly=True,
+            secure=True,
+            samesite="lax",
+            max_age=60 * 60 * 24 * 30,  # 30 days
+        )
+        return response
+    except HTTPException:
+        raise
     except Exception as e:
         raise HTTPException(500, f"Failed to exchange code: {e}")
 
@@ -181,36 +252,47 @@ async def get_userinfo(
 
 
 @router.get("/oauth/status")
-async def oauth_status():
-    """Check if user is authenticated (for sidebar)."""
+async def oauth_status(spr_session: Optional[str] = Cookie(None)):
+    """Check if this browser's session is authenticated."""
     try:
-        tokens = token_storage.load_tokens(DEFAULT_USER_ID)
+        if not spr_session:
+            return {"authenticated": False}
+
+        # Load tokens for this session
+        tokens = token_storage.load_tokens(spr_session)
         if not tokens:
             return {"authenticated": False}
 
-        # Check if expired
-        if token_storage.is_expired(tokens):
-            if "refresh_token" not in tokens:
-                return {"authenticated": False}
-            try:
-                new_tokens = oauth_client.refresh_access_token(tokens["refresh_token"])
-                token_storage.save_tokens(DEFAULT_USER_ID, new_tokens)
-            except Exception:
-                return {"authenticated": False}
+        # Validate token content
+        access_token = tokens.get("access_token")
+        email = tokens.get("email")
+
+        if not access_token or not email:
+            return {"authenticated": False}
 
         return {
             "authenticated": True,
-            "user": {"email": f"{DEFAULT_USER_ID}@authenticated"},
+            "user": {"email": email},
         }
     except Exception:
         return {"authenticated": False}
 
 
 @router.get("/oauth/logout")
-async def logout():
-    """Clear stored tokens."""
-    token_storage.delete_tokens(DEFAULT_USER_ID)
-    return {"status": "ok", "message": "Logged out"}
+async def logout(redirect: str = "/", spr_session: Optional[str] = Cookie(None)):
+    """Clear this browser's session and redirect."""
+    response = RedirectResponse(url=redirect)
+
+    # Delete token file for this session
+    if spr_session:
+        storage_path = Path("/app/artery/veins/google/storage")
+        token_file = storage_path / f"tokens_{spr_session}.json"
+        if token_file.exists():
+            token_file.unlink()
+
+    # Clear the session cookie
+    response.delete_cookie(key=SESSION_COOKIE)
+    return response
 
 
 @router.get("/spreadsheets/{spreadsheet_id}")