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from sqlalchemy import select
from sqlalchemy.exc import SQLAlchemyError, DBAPIError
from datetime import datetime
from fastapi import HTTPException, Request
import os
from ..database.db import session_pool
from ..errors import DatabaseConnectionError
from ..model.user import User
from ..model.profile import Profile
from ..model.login_session import LoginSession
from ..model.user_settings import UserSettings
from ..schema.auth import RegisterRequest, LoginRequest
from ..lib.auth import (
hash_password,
verify_password,
create_access_token,
create_refresh_token,
store_token_in_session,
)
from ..core.logger import SingletonLogger
from ..errors import *
logger = SingletonLogger().get_logger()
async def register_user(register_data: RegisterRequest):
"""Register a new user with email and password"""
try:
async with session_pool() as session:
# Check if email already exists
result = await session.execute(
select(User).where(User.email == register_data.email)
)
if result.scalar_one_or_none():
logger.warning(
f"Registration attempt with existing email: {register_data.email}"
)
raise HTTPException(status_code=400, detail="Email already registered")
# Check if username already exists
result = await session.execute(
select(User).where(User.username == register_data.username)
)
if result.scalar_one_or_none():
logger.warning(
f"Registration attempt with existing username: {register_data.username}"
)
raise HTTPException(status_code=400, detail="Username already taken")
# Create new user
hashed_password = hash_password(register_data.password)
user = User(
username=register_data.username,
full_name=register_data.full_name,
email=register_data.email,
password=hashed_password,
)
session.add(user)
await session.commit()
await session.refresh(user)
# Create default profile and settings for the new user
profile = Profile(user_id=user.id)
user_settings = UserSettings(user_id=user.id)
session.add_all([profile, user_settings])
await session.commit()
logger.info(
f"User registered successfully: {user.username} (ID: {user.id})"
)
return {
"id": user.id,
"username": user.username,
"email": user.email,
"full_name": user.full_name,
}
except HTTPException:
raise
except DBAPIError as e:
logger.exception(
f"Database connection error during registration for email={register_data.email}: {str(e)}"
)
raise DatabaseConnectionError(str(e))
except SQLAlchemyError as e:
logger.error(
f"Database error during registration for email={register_data.email}: {str(e)}"
)
raise HTTPException(status_code=500, detail="Failed to register user")
except Exception as e:
logger.error(
f"Unexpected error during registration for email={register_data.email}: {str(e)}"
)
raise HTTPException(status_code=500, detail="Internal server error")
async def login_user(login_data: LoginRequest, request: Request):
"""Authenticate user with email and password"""
try:
async with session_pool() as session:
# Find user by email
result = await session.execute(
select(User).where(User.email == login_data.email)
)
user = result.scalar_one_or_none()
if not user or not user.password:
logger.warning(f"Login attempt with invalid email: {login_data.email}")
raise HTTPException(status_code=401, detail="Invalid credentials")
if not verify_password(login_data.password, user.password):
logger.warning(
f"Login attempt with invalid password for email: {login_data.email}"
)
raise HTTPException(status_code=401, detail="Invalid credentials")
# Create tokens
access_token, token_expires_at = create_access_token(
data={"sub": str(user.id)}
)
refresh_token, _ = create_refresh_token(subject=str(user.id))
# Store tokens in login session
login_session = await store_token_in_session(
session=session,
user_id=user.id,
access_token=access_token,
refresh_token=refresh_token,
login_method="password",
device_info=(
request.headers.get("sec-ch-ua-platform", "").strip('"')
if request.headers.get("sec-ch-ua-platform")
else None
),
ip_address=request.client.host if request.client else None,
user_agent=request.headers.get("user-agent"),
token_expires_at=token_expires_at,
)
logger.info(f"User logged in successfully: {user.username} (ID: {user.id})")
return {
"access_token": access_token,
"refresh_token": refresh_token,
"token_type": "bearer",
"expires_in": int(
(token_expires_at - datetime.utcnow()).total_seconds()
),
"user": {
"id": user.id,
"username": user.username,
"email": user.email,
"full_name": user.full_name,
},
}
except HTTPException:
raise
except DBAPIError as e:
logger.exception(
f"Database connection error during login for email={login_data.email}: {str(e)}"
)
raise DatabaseConnectionError(str(e))
except SQLAlchemyError as e:
logger.error(
f"Database error during login for email={login_data.email}: {str(e)}"
)
raise HTTPException(status_code=500, detail="Failed to login user")
except Exception as e:
logger.error(
f"Unexpected error during login for email={login_data.email}: {str(e)}"
)
raise HTTPException(status_code=500, detail="Internal server error")
oauth = AsyncOAuth2Client(
client_id=os.getenv("GOOGLE_CLIENT_ID"),
client_secret=os.getenv("GOOGLE_CLIENT_SECRET"),
authorize_url="https://accounts.google.com/o/oauth2/auth",
access_token_url="https://oauth2.googleapis.com/token",
userinfo_url="https://www.googleapis.com/oauth2/v2/userinfo",
)
async def initiate_google_login():
"""Generate Google OAuth authorization URL"""
try:
authorization_url, state = oauth.create_authorization_url(
"https://accounts.google.com/o/oauth2/auth",
scope=["openid", "email", "profile"],
redirect_uri=os.getenv("GOOGLE_REDIRECT_URI"),
)
logger.info("Google OAuth authorization URL generated")
return {"authorization_url": authorization_url, "state": state}
except Exception as e:
logger.error(f"Error generating Google OAuth URL: {str(e)}")
raise HTTPException(status_code=500, detail="Failed to initiate Google login")
async def handle_google_callback(code: str, state: str, request: Request):
"""Process Google OAuth callback and authenticate/create user"""
try:
token = await oauth.fetch_token(
"https://oauth2.googleapis.com/token",
code=code,
redirect_uri=os.getenv("GOOGLE_REDIRECT_URI"),
)
user_info = await oauth.get("https://www.googleapis.com/oauth2/v2/userinfo")
user_data = user_info.json()
async with session_pool() as session:
result = await session.execute(
select(User).where(User.google_id == user_data["id"])
)
user = result.scalar_one_or_none()
if not user:
result = await session.execute(
select(User).where(User.email == user_data["email"])
)
user = result.scalar_one_or_none()
if user:
user.google_id = user_data["id"]
else:
username = user_data["email"].split("@")[0]
existing = await session.execute(
select(User).where(User.username == username)
)
if existing.scalar_one_or_none():
username = f"{username}_{user_data['id']}"
user = User(
username=username,
full_name=user_data["name"],
email=user_data["email"],
google_id=user_data["id"],
)
session.add(user)
await session.commit()
await session.refresh(user)
# Create default profile and settings for the new Google user
profile = Profile(user_id=user.id)
user_settings = UserSettings(user_id=user.id)
session.add_all([profile, user_settings])
await session.commit()
# Create tokens
access_token, token_expires_at = create_access_token(
data={"sub": str(user.id)}
)
refresh_token, _ = create_refresh_token(subject=str(user.id))
# Store tokens in login session
login_session = await store_token_in_session(
session=session,
user_id=user.id,
access_token=access_token,
refresh_token=refresh_token,
login_method="google",
device_info=(
request.headers.get("sec-ch-ua-platform", "").strip('"')
if request.headers.get("sec-ch-ua-platform")
else None
),
ip_address=request.client.host if request.client else None,
user_agent=request.headers.get("user-agent"),
token_expires_at=token_expires_at,
)
logger.info(f"User logged in via Google: {user.username} (ID: {user.id})")
return {
"access_token": access_token,
"refresh_token": refresh_token,
"token_type": "bearer",
"expires_in": int(
(token_expires_at - datetime.utcnow()).total_seconds()
),
"user": {
"id": user.id,
"username": user.username,
"email": user.email,
"full_name": user.full_name,
},
}
except HTTPException:
raise
except DBAPIError as e:
logger.exception(
f"Database connection error during Google OAuth callback: {str(e)}"
)
raise DatabaseConnectionError(str(e))
except SQLAlchemyError as e:
logger.error(f"Database error during Google OAuth callback: {str(e)}")
raise HTTPException(status_code=500, detail="Failed to process Google login")
except Exception as e:
logger.error(f"Unexpected error during Google OAuth callback: {str(e)}")
raise HTTPException(status_code=500, detail="OAuth authentication failed")
async def logout_user(user_id: int, session_id: int | None = None):
"""Logout user by deactivating login session(s)"""
try:
async with session_pool() as session:
if session_id:
result = await session.execute(
select(LoginSession).where(
LoginSession.id == session_id,
LoginSession.user_id == user_id,
LoginSession.is_active == True,
)
)
login_session = result.scalar_one_or_none()
if login_session:
login_session.is_active = False
login_session.logout_at = datetime.utcnow()
await session.commit()
logger.info(
f"User logged out: user_id={user_id}, session_id={session_id}"
)
return {"message": "Logged out successfully"}
else:
logger.warning(
f"Logout attempt with invalid session: user_id={user_id}, session_id={session_id}"
)
raise HTTPException(
status_code=404, detail="Active session not found"
)
else:
result = await session.execute(
select(LoginSession).where(
LoginSession.user_id == user_id, LoginSession.is_active == True
)
)
login_sessions = result.scalars().all()
for ls in login_sessions:
ls.is_active = False
ls.logout_at = datetime.utcnow()
await session.commit()
logger.info(
f"User logged out from all sessions: user_id={user_id}, count={len(login_sessions)}"
)
return {"message": f"Logged out from {len(login_sessions)} sessions"}
except HTTPException:
raise
except DBAPIError as e:
logger.exception(
f"Database connection error during logout for user_id={user_id}: {str(e)}"
)
raise DatabaseConnectionError(str(e))
except SQLAlchemyError as e:
logger.error(f"Database error during logout for user_id={user_id}: {str(e)}")
raise HTTPException(status_code=500, detail="Failed to logout user")
except Exception as e:
logger.error(f"Unexpected error during logout for user_id={user_id}: {str(e)}")
raise HTTPException(status_code=500, detail="Internal server error")
async def get_user_sessions(user_id: int):
"""Get all login sessions for a user"""
try:
async with session_pool() as session:
result = await session.execute(
select(LoginSession)
.where(LoginSession.user_id == user_id)
.order_by(LoginSession.created_at.desc())
)
sessions = result.scalars().all()
return [
{
"id": s.id,
"login_method": s.login_method,
"is_active": s.is_active,
"created_at": s.created_at,
"logout_at": s.logout_at,
"device_info": s.device_info,
"ip_address": s.ip_address,
}
for s in sessions
]
except DBAPIError as e:
logger.exception(
f"Database connection error fetching sessions for user_id={user_id}: {str(e)}"
)
raise DatabaseConnectionError(str(e))
except SQLAlchemyError as e:
logger.error(
f"Database error fetching sessions for user_id={user_id}: {str(e)}"
)
raise HTTPException(status_code=500, detail="Failed to retrieve user sessions")
except Exception as e:
logger.error(
f"Unexpected error fetching sessions for user_id={user_id}: {str(e)}"
)
raise HTTPException(status_code=500, detail="Internal server error")
async def delete_user_account(user_id: int):
"""Delete a user account and all associated data"""
try:
async with session_pool() as session:
result = await session.execute(select(User).where(User.id == user_id))
user = result.scalar_one_or_none()
if not user:
logger.warning(
f"Delete attempt for non-existent user: user_id={user_id}"
)
raise HTTPException(status_code=404, detail="User not found")
username = user.username
# Delete the user (cascade will handle related records)
await session.delete(user)
await session.commit()
logger.info(f"User account deleted: {username} (ID: {user_id})")
return {"message": "User account deleted successfully"}
except HTTPException:
raise
except DBAPIError as e:
logger.exception(
f"Database connection error deleting user account for user_id={user_id}: {str(e)}"
)
raise DatabaseConnectionError(str(e))
except SQLAlchemyError as e:
logger.error(
f"Database error deleting user account for user_id={user_id}: {str(e)}"
)
raise HTTPException(status_code=500, detail="Failed to delete user account")
except Exception as e:
logger.error(
f"Unexpected error deleting user account for user_id={user_id}: {str(e)}"
)
raise HTTPException(status_code=500, detail="Internal server error")
async def refresh_access_token(refresh_token: str):
"""Refresh access token using a valid refresh token"""
try:
async with session_pool() as session:
# Find the login session with this refresh token
result = await session.execute(
select(LoginSession).where(
LoginSession.refresh_token == refresh_token,
LoginSession.is_active == True,
)
)
login_session = result.scalar_one_or_none()
if not login_session:
logger.warning("Token refresh attempt with invalid refresh token")
raise HTTPException(status_code=401, detail="Invalid refresh token")
# Get the user
user_result = await session.execute(
select(User).where(User.id == login_session.user_id)
)
user = user_result.scalar_one_or_none()
if not user:
logger.warning(
f"Token refresh for non-existent user: user_id={login_session.user_id}"
)
raise HTTPException(status_code=401, detail="User not found")
# Create new access token
new_access_token, token_expires_at = create_access_token(
data={"sub": str(user.id)}
)
# Update the login session with new access token
login_session.access_token = new_access_token
login_session.token_expires_at = token_expires_at
await session.commit()
logger.info(f"Token refreshed successfully for user: {user.username}")
return {
"access_token": new_access_token,
"token_type": "bearer",
"expires_in": int(
(token_expires_at - datetime.utcnow()).total_seconds()
),
}
except HTTPException:
raise
except DBAPIError as e:
logger.exception(f"Database connection error during token refresh: {str(e)}")
raise DatabaseConnectionError(str(e))
except SQLAlchemyError as e:
logger.error(f"Database error during token refresh: {str(e)}")
raise HTTPException(status_code=500, detail="Failed to refresh token")
except Exception as e:
logger.error(f"Unexpected error during token refresh: {str(e)}")
raise HTTPException(status_code=500, detail="Internal server error")
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