Add FastAPI application, API endpoints, Celery workers, and Docker configuration

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
2026-02-01 12:48:32 +00:00
parent 130b53d37f
commit 5be2794c95
18 changed files with 1648 additions and 0 deletions
@@ -0,0 +1,131 @@
+"""
+OAuth2 authentication service for Google and other providers.
+"""
+from typing import Dict, Any, Optional
+from datetime import datetime
+import httpx
+from authlib.integrations.starlette_client import OAuth
+from fastapi import HTTPException, status
+import logging
+
+from app.core.config import settings
+from app.core.security import create_access_token, create_refresh_token
+from app.models.database_models import User
+
+logger = logging.getLogger(__name__)
+
+
+class OAuthService:
+    """OAuth2 authentication service"""
+    
+    def __init__(self):
+        self.oauth = OAuth()
+        self._register_google()
+    
+    def _register_google(self):
+        """Register Google OAuth2 provider"""
+        if settings.GOOGLE_CLIENT_ID and settings.GOOGLE_CLIENT_SECRET:
+            self.oauth.register(
+                name='google',
+                client_id=settings.GOOGLE_CLIENT_ID,
+                client_secret=settings.GOOGLE_CLIENT_SECRET,
+                server_metadata_url='https://accounts.google.com/.well-known/openid-configuration',
+                client_kwargs={'scope': 'openid email profile'}
+            )
+    
+    async def get_google_user_info(self, code: str, redirect_uri: str) -> Dict[str, Any]:
+        """
+        Exchange Google authorization code for user information.
+        
+        Args:
+            code: Authorization code from Google
+            redirect_uri: Redirect URI used in OAuth flow
+        
+        Returns:
+            Dict with user information (email, name, google_id)
+        """
+        try:
+            # Exchange code for token
+            async with httpx.AsyncClient() as client:
+                token_response = await client.post(
+                    'https://oauth2.googleapis.com/token',
+                    data={
+                        'code': code,
+                        'client_id': settings.GOOGLE_CLIENT_ID,
+                        'client_secret': settings.GOOGLE_CLIENT_SECRET,
+                        'redirect_uri': redirect_uri,
+                        'grant_type': 'authorization_code'
+                    }
+                )
+                
+                if token_response.status_code != 200:
+                    logger.error(f"Google token exchange failed: {token_response.text}")
+                    raise HTTPException(
+                        status_code=status.HTTP_400_BAD_REQUEST,
+                        detail="Failed to exchange authorization code"
+                    )
+                
+                token_data = token_response.json()
+                access_token = token_data.get('access_token')
+                
+                if not access_token:
+                    raise HTTPException(
+                        status_code=status.HTTP_400_BAD_REQUEST,
+                        detail="No access token received"
+                    )
+                
+                # Get user info
+                user_info_response = await client.get(
+                    'https://www.googleapis.com/oauth2/v2/userinfo',
+                    headers={'Authorization': f'Bearer {access_token}'}
+                )
+                
+                if user_info_response.status_code != 200:
+                    logger.error(f"Google user info fetch failed: {user_info_response.text}")
+                    raise HTTPException(
+                        status_code=status.HTTP_400_BAD_REQUEST,
+                        detail="Failed to get user information"
+                    )
+                
+                user_info = user_info_response.json()
+                
+                return {
+                    'email': user_info.get('email'),
+                    'full_name': user_info.get('name'),
+                    'google_id': user_info.get('id'),
+                    'picture': user_info.get('picture'),
+                    'verified_email': user_info.get('verified_email', False)
+                }
+                
+        except HTTPException:
+            raise
+        except Exception as e:
+            logger.error(f"OAuth error: {e}")
+            raise HTTPException(
+                status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+                detail="OAuth authentication failed"
+            )
+    
+    @staticmethod
+    def create_tokens_for_user(user: User) -> Dict[str, str]:
+        """
+        Create access and refresh tokens for a user.
+        
+        Args:
+            user: User database model
+        
+        Returns:
+            Dict with access_token, refresh_token, and token_type
+        """
+        access_token = create_access_token(data={"sub": user.id})
+        refresh_token = create_refresh_token(data={"sub": user.id})
+        
+        return {
+            "access_token": access_token,
+            "refresh_token": refresh_token,
+            "token_type": "bearer"
+        }
+
+
+# Global OAuth service instance
+oauth_service = OAuthService()