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from fastapi import APIRouter, HTTPException, status, Depends
from pydantic import BaseModel
import sqlite3
import bcrypt
if not hasattr(bcrypt, "__about__"):
class DummyAbout:
__version__ = getattr(bcrypt, "__version__", "4.0.0")
bcrypt.__about__ = DummyAbout()
from passlib.context import CryptContext
from fastapi.security import OAuth2PasswordRequestForm
router = APIRouter()
pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
DB_PATH = "users.db" # Adjust path if needed
def init_history_db():
try:
conn = sqlite3.connect(DB_PATH)
cur = conn.cursor()
cur.execute("""
CREATE TABLE IF NOT EXISTS query_history (
id INTEGER PRIMARY KEY AUTOINCREMENT,
username TEXT NOT NULL,
natural_query TEXT NOT NULL,
generated_sql TEXT NOT NULL,
executed_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
)
""")
conn.commit()
conn.close()
print("Query history table initialized successfully.")
except Exception as e:
print(f"Error initializing query_history table: {e}")
# Run initialization
init_history_db()
def get_db():
try:
conn = sqlite3.connect(DB_PATH)
conn.row_factory = sqlite3.Row
return conn
except Exception as e:
raise HTTPException(status_code=500, detail=f"Database connection error: {str(e)}")
class UserCreate(BaseModel):
username: str
password: str
class UserOut(BaseModel):
id: int | None = None
username: str
def get_user_by_username(conn, username: str):
try:
cur = conn.cursor()
cur.execute("SELECT * FROM users WHERE username = ?", (username,))
return cur.fetchone()
except Exception as e:
return None
def create_user(conn, username: str, password: str):
try:
hashed_password = pwd_context.hash(password)
cur = conn.cursor()
cur.execute("INSERT INTO users (username, password) VALUES (?, ?)", (username, hashed_password))
conn.commit()
return cur.lastrowid
except sqlite3.IntegrityError:
return None
except Exception as e:
return None
@router.post("/signup", response_model=UserOut)
def signup(user: UserCreate):
try:
conn = get_db()
if get_user_by_username(conn, user.username):
raise HTTPException(status_code=400, detail="Username already exists")
user_id = create_user(conn, user.username, user.password)
if not user_id:
raise HTTPException(status_code=400, detail="Could not create user")
return {"id": user_id, "username": user.username}
except HTTPException:
raise
except Exception as e:
raise HTTPException(status_code=500, detail=f"Signup error: {str(e)}")
@router.post("/login")
def login(form_data: OAuth2PasswordRequestForm = Depends()):
try:
conn = get_db()
user = get_user_by_username(conn, form_data.username)
if not user:
raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid credentials")
try:
valid = pwd_context.verify(form_data.password, user["password"])
except Exception:
raise HTTPException(status_code=500, detail="Password verification error")
if not valid:
raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid credentials")
# Defensive: handle missing id column
user_id = user["id"] if "id" in user.keys() else None
return {"id": user_id, "username": user["username"]}
except HTTPException:
raise
except Exception as e:
raise HTTPException(status_code=500, detail=f"Login error: {str(e)}")
@router.post("/connections")
def add_connection(name:str, connection_strings:str, username: str):
conn = get_db()
cur = conn.cursor()
cur.execute("INSERT INTO connections (name, connection_strings, username) VALUES (?, ?, ?)", (name, connection_strings, username))
conn.commit()
return {"message": "Connection added successfully!"}
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