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Controller for user settings operations.
"""
from typing import Optional
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
from src.model import UserSettings
from src.schema.user_settings import UserSettingsUpdate
from fastapi import HTTPException, status
from cryptography.fernet import Fernet, InvalidToken
import os
# Get the same encryption key used by the model
ENCRYPTION_KEY = os.getenv("ENCRYPTION_KEY")
if not ENCRYPTION_KEY:
raise ValueError("ENCRYPTION_KEY environment variable is not set")
fernet = Fernet(ENCRYPTION_KEY.encode())
class UserSettingsController:
"""Controller for user settings operations."""
@staticmethod
def is_api_key_encrypted(api_key: str) -> bool:
"""
Check if an API key is already encrypted (Fernet token) or plaintext.
Args:
api_key: The API key string to check
Returns:
True if encrypted, False if plaintext
"""
if not api_key:
return False
if len(api_key) < 80:
return False
try:
decrypted = fernet.decrypt(api_key.encode()).decode()
return True
except (InvalidToken, Exception) as e:
return False
@staticmethod
async def get_user_settings(
session: AsyncSession, user_id: int
) -> Optional[UserSettings]:
"""
Get user settings by user ID.
Args:
session: Database session
user_id: User ID
Returns:
UserSettings object or None if not found
"""
result = await session.execute(
select(UserSettings).where(UserSettings.user_id == user_id)
)
return result.scalar_one_or_none()
@staticmethod
async def create_user_settings(
session: AsyncSession,
user_id: int,
location: Optional[str] = None,
custom_summary_instructions: Optional[str] = None,
usability_analysis_instructions: Optional[str] = None,
summary_model: Optional[str] = None,
usability_model: Optional[str] = None,
api_keys: Optional[list[dict]] = None,
) -> UserSettings:
"""
Create user settings.
Args:
session: Database session
user_id: User ID
location: User location
custom_summary_instructions: Custom summary instructions
usability_analysis_instructions: Usability analysis instructions
api_keys: List of API key dictionaries
Returns:
Created UserSettings object
"""
settings = UserSettings(
user_id=user_id,
location=location,
custom_summary_instructions=custom_summary_instructions,
usability_analysis_instructions=usability_analysis_instructions,
summary_model=summary_model,
usability_model=usability_model,
)
if api_keys:
# Process each key: encrypt only if not already encrypted
processed_keys = []
for key_item in api_keys:
processed_item = key_item.copy()
api_key_value = processed_item.get("api_key", "")
slug = processed_item.get("slug", "unknown")
# Only encrypt if the key is plaintext
if api_key_value and not UserSettingsController.is_api_key_encrypted(
api_key_value
):
encrypted_value = fernet.encrypt(api_key_value.encode()).decode()
processed_item["api_key"] = encrypted_value
processed_keys.append(processed_item)
settings.api_keys_encrypted = processed_keys
session.add(settings)
await session.commit()
await session.refresh(settings)
return settings
@staticmethod
async def update_user_settings(
session: AsyncSession, user_id: int, settings_data: UserSettingsUpdate
) -> UserSettings:
"""
Update user settings.
Args:
session: Database session
user_id: User ID
settings_data: Settings data to update
Returns:
Updated UserSettings object
Raises:
HTTPException: If settings not found
"""
# Get existing settings
settings = await UserSettingsController.get_user_settings(session, user_id)
if not settings:
# Create new settings if they don't exist
api_keys = None
if settings_data.api_keys_encrypted:
api_keys = [
item.model_dump() for item in settings_data.api_keys_encrypted
]
settings = await UserSettingsController.create_user_settings(
session=session,
user_id=user_id,
location=settings_data.location,
custom_summary_instructions=settings_data.custom_summary_instructions,
usability_analysis_instructions=settings_data.usability_analysis_instructions,
summary_model=settings_data.summary_model,
usability_model=settings_data.usability_model,
api_keys=api_keys,
)
return settings
# Update existing settings
update_data = settings_data.model_dump(exclude_unset=True)
# Handle api_keys_encrypted separately
if "api_keys_encrypted" in update_data:
api_keys = update_data.pop("api_keys_encrypted")
if api_keys is not None:
# Handle empty array to clear all keys
if len(api_keys) == 0:
settings.api_keys_encrypted = []
else:
# Process each key: encrypt only if not already encrypted
processed_keys = []
for item in api_keys:
key_dict = (
item.model_dump() if hasattr(item, "model_dump") else item
)
processed_item = key_dict.copy()
api_key_value = processed_item.get("api_key", "")
slug = processed_item.get("slug", "unknown")
if (
api_key_value
and not UserSettingsController.is_api_key_encrypted(
api_key_value
)
):
encrypted_value = fernet.encrypt(
api_key_value.encode()
).decode()
processed_item["api_key"] = encrypted_value
processed_keys.append(processed_item)
settings.api_keys_encrypted = processed_keys
# Update other fields
for field, value in update_data.items():
setattr(settings, field, value)
await session.commit()
await session.refresh(settings)
return settings
@staticmethod
async def get_or_create_user_settings(
session: AsyncSession, user_id: int
) -> UserSettings:
"""
Get user settings, creating them if they don't exist.
Args:
session: Database session
user_id: User ID
Returns:
UserSettings object
"""
settings = await UserSettingsController.get_user_settings(session, user_id)
if not settings:
settings = await UserSettingsController.create_user_settings(
session, user_id
)
return settings
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