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from fastapi import HTTPException, Request, Depends
from typing import Optional, List, Dict, Any
import jwt
from jwt.exceptions import PyJWTError
from utils.logger import logger
# This function extracts the user ID from Supabase JWT
async def get_current_user_id_from_jwt(request: Request) -> str:
"""
Extract and verify the user ID from the JWT in the Authorization header.
This function is used as a dependency in FastAPI routes to ensure the user
is authenticated and to provide the user ID for authorization checks.
Args:
request: The FastAPI request object
Returns:
str: The user ID extracted from the JWT
Raises:
HTTPException: If no valid token is found or if the token is invalid
"""
auth_header = request.headers.get('Authorization')
if not auth_header or not auth_header.startswith('Bearer '):
raise HTTPException(
status_code=401,
detail="No valid authentication credentials found",
headers={"WWW-Authenticate": "Bearer"}
)
token = auth_header.split(' ')[1]
try:
# For Supabase JWT, we just need to decode and extract the user ID
# The actual validation is handled by Supabase's RLS
payload = jwt.decode(token, options={"verify_signature": False})
# Supabase stores the user ID in the 'sub' claim
user_id = payload.get('sub')
if not user_id:
raise HTTPException(
status_code=401,
detail="Invalid token payload",
headers={"WWW-Authenticate": "Bearer"}
)
return user_id
except PyJWTError:
raise HTTPException(
status_code=401,
detail="Invalid token",
headers={"WWW-Authenticate": "Bearer"}
)
async def get_account_id_from_thread(client, thread_id: str) -> str:
"""
Extract and verify the account ID from the thread.
Args:
client: The Supabase client
thread_id: The ID of the thread
Returns:
str: The account ID associated with the thread
Raises:
HTTPException: If the thread is not found or if there's an error
"""
try:
response = await client.table('threads').select('account_id').eq('thread_id', thread_id).execute()
if not response.data or len(response.data) == 0:
raise HTTPException(
status_code=404,
detail="Thread not found"
)
account_id = response.data[0].get('account_id')
if not account_id:
raise HTTPException(
status_code=500,
detail="Thread has no associated account"
)
return account_id
except Exception as e:
raise HTTPException(
status_code=500,
detail=f"Error retrieving thread information: {str(e)}"
)
async def get_user_id_from_stream_auth(
request: Request,
token: Optional[str] = None
) -> str:
"""
Extract and verify the user ID from either the Authorization header or query parameter token.
This function is specifically designed for streaming endpoints that need to support both
header-based and query parameter-based authentication (for EventSource compatibility).
Args:
request: The FastAPI request object
token: Optional token from query parameters
Returns:
str: The user ID extracted from the JWT
Raises:
HTTPException: If no valid token is found or if the token is invalid
"""
# Try to get user_id from token in query param (for EventSource which can't set headers)
if token:
try:
# For Supabase JWT, we just need to decode and extract the user ID
payload = jwt.decode(token, options={"verify_signature": False})
user_id = payload.get('sub')
if user_id:
return user_id
except Exception:
pass
# If no valid token in query param, try to get it from the Authorization header
auth_header = request.headers.get('Authorization')
if auth_header and auth_header.startswith('Bearer '):
try:
# Extract token from header
header_token = auth_header.split(' ')[1]
payload = jwt.decode(header_token, options={"verify_signature": False})
user_id = payload.get('sub')
if user_id:
return user_id
except Exception:
pass
# If we still don't have a user_id, return authentication error
raise HTTPException(
status_code=401,
detail="No valid authentication credentials found",
headers={"WWW-Authenticate": "Bearer"}
)
async def verify_thread_access(client, thread_id: str, user_id: str):
"""
Verify that a user has access to a specific thread based on account membership.
Args:
client: The Supabase client
thread_id: The thread ID to check access for
user_id: The user ID to check permissions for
Returns:
bool: True if the user has access
Raises:
HTTPException: If the user doesn't have access to the thread
"""
# Query the thread to get account information
thread_result = await client.table('threads').select('*,project_id').eq('thread_id', thread_id).execute()
if not thread_result.data or len(thread_result.data) == 0:
raise HTTPException(status_code=404, detail="Thread not found")
thread_data = thread_result.data[0]
# Check if project is public
project_id = thread_data.get('project_id')
if project_id:
project_result = await client.table('projects').select('is_public').eq('project_id', project_id).execute()
if project_result.data and len(project_result.data) > 0:
if project_result.data[0].get('is_public'):
return True
account_id = thread_data.get('account_id')
# When using service role, we need to manually check account membership instead of using current_user_account_role
if account_id:
account_user_result = await client.schema('basejump').from_('account_user').select('account_role').eq('user_id', user_id).eq('account_id', account_id).execute()
if account_user_result.data and len(account_user_result.data) > 0:
return True
raise HTTPException(status_code=403, detail="Not authorized to access this thread")
async def get_optional_user_id(request: Request) -> Optional[str]:
"""
Extract the user ID from the JWT in the Authorization header if present,
but don't require authentication. Returns None if no valid token is found.
This function is used for endpoints that support both authenticated and
unauthenticated access (like public projects).
Args:
request: The FastAPI request object
Returns:
Optional[str]: The user ID extracted from the JWT, or None if no valid token
"""
auth_header = request.headers.get('Authorization')
if not auth_header or not auth_header.startswith('Bearer '):
return None
token = auth_header.split(' ')[1]
try:
# For Supabase JWT, we just need to decode and extract the user ID
payload = jwt.decode(token, options={"verify_signature": False})
# Supabase stores the user ID in the 'sub' claim
user_id = payload.get('sub')
return user_id
except PyJWTError:
return None
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