feat: T03+T04 backend - FastAPI, DB models, Rentman integration, admin auth, APScheduler

backend/app/auth.py

@@ -0,0 +1,77 @@
+"""JWT authentication helpers."""
+from datetime import datetime, timedelta, timezone
+from typing import Optional
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+from fastapi import Depends, HTTPException, status, Request
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+from app.config import get_settings
+from app.database import get_db
+from app.models.admin_user import AdminUser
+
+
+settings = get_settings()
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    """Verify a plain password against a hash."""
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password: str) -> str:
+    """Hash a password using bcrypt."""
+    return pwd_context.hash(password)
+
+
+def create_access_token(data: dict, expires_delta: timedelta | None = None) -> str:
+    """Create a JWT access token."""
+    to_encode = data.copy()
+    expire = datetime.now(timezone.utc) + (
+        expires_delta or timedelta(hours=settings.jwt_expire_hours)
+    )
+    to_encode.update({"exp": expire})
+    return jwt.encode(to_encode, settings.jwt_secret, algorithm=settings.jwt_algorithm)
+
+
+def verify_token(token: str) -> dict | None:
+    """Verify a JWT token and return its payload."""
+    try:
+        payload = jwt.decode(token, settings.jwt_secret, algorithms=[settings.jwt_algorithm])
+        return payload
+    except JWTError:
+        return None
+
+
+async def get_current_user(
+    request: Request,
+    db: AsyncSession = Depends(get_db),
+) -> AdminUser:
+    """Dependency: extract JWT from cookie, verify, return AdminUser."""
+    token = request.cookies.get("hms_admin_token")
+    if not token:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Not authenticated",
+        )
+    payload = verify_token(token)
+    if not payload:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid or expired token",
+        )
+    username = payload.get("sub")
+    if not username:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid token payload",
+        )
+    result = await db.execute(select(AdminUser).where(AdminUser.username == username))
+    user = result.scalar_one_or_none()
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="User not found",
+        )
+    return user