Add authentication endpoints

backend/app/api/v1/auth.py

@@ -0,0 +1,102 @@
+"""Authentication endpoints."""
+from datetime import timedelta
+from fastapi import APIRouter, Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
+from sqlalchemy.orm import Session
+
+from app.core.database import get_db
+from app.core.security import verify_password, create_access_token, decode_access_token
+from app.core.config import settings
+from app.models.user import User
+from app.schemas.auth import Token
+from app.schemas.user import UserCreate, UserResponse
+
+router = APIRouter()
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/v1/auth/login")
+
+def get_current_user(token: str = Depends(oauth2_scheme), db: Session = Depends(get_db)) -> User:
+    """Get the current authenticated user."""
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    
+    payload = decode_access_token(token)
+    if payload is None:
+        raise credentials_exception
+    
+    username: str = payload.get("sub")
+    if username is None:
+        raise credentials_exception
+    
+    user = db.query(User).filter(User.username == username).first()
+    if user is None:
+        raise credentials_exception
+    
+    return user
+
+@router.post("/register", response_model=UserResponse, status_code=status.HTTP_201_CREATED)
+async def register(user_data: UserCreate, db: Session = Depends(get_db)):
+    """Register a new user."""
+    # Check if username already exists
+    if db.query(User).filter(User.username == user_data.username).first():
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Username already registered"
+        )
+    
+    # Check if email already exists
+    if db.query(User).filter(User.email == user_data.email).first():
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Email already registered"
+        )
+    
+    # Create new user
+    from app.core.security import get_password_hash
+    db_user = User(
+        username=user_data.username,
+        email=user_data.email,
+        full_name=user_data.full_name,
+        hashed_password=get_password_hash(user_data.password),
+        is_active=True,
+        is_admin=False
+    )
+    
+    db.add(db_user)
+    db.commit()
+    db.refresh(db_user)
+    
+    return db_user
+
+@router.post("/login", response_model=Token)
+async def login(form_data: OAuth2PasswordRequestForm = Depends(), db: Session = Depends(get_db)):
+    """Login and get access token."""
+    user = db.query(User).filter(User.username == form_data.username).first()
+    
+    if not user or not verify_password(form_data.password, user.hashed_password):
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect username or password",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    
+    if not user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Inactive user"
+        )
+    
+    access_token_expires = timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
+    access_token = create_access_token(
+        data={"sub": user.username},
+        expires_delta=access_token_expires
+    )
+    
+    return {"access_token": access_token, "token_type": "bearer"}
+
+@router.get("/me", response_model=UserResponse)
+async def get_current_user_info(current_user: User = Depends(get_current_user)):
+    """Get current user information."""
+    return current_user