Implement auth

I basically copied this article https://fastapi.tiangolo.com/tutorial/security/oauth2-jwt

app/main.py

@@ -1,6 +1,10 @@
 from fastapi import FastAPI
+from fastapi.security import OAuth2PasswordBearer
 from .controllers import userManager, cardManager, groupManager, aaManager
 from .services.database import create_db_and_tables
+from .services.auth import token_router
+
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")
 
 app = FastAPI()
 @app.on_event("startup")
@@ -8,6 +12,8 @@ def on_startup():
     create_db_and_tables()
     print("Database created and tables initialized.")
 
+
+app.include_router(token_router)
 app.include_router(userManager.user_router)
 app.include_router(groupManager.group_router)
 app.include_router(cardManager.card_router)

app/model/models.py

@@ -18,7 +18,7 @@ class UserCreate(UserBase):
 
 class UserDB(UserBase, table=True):
     id: int | None = Field(default=None, primary_key=True)
-    password: str
+    passwordhash: str
 
 class UserUpdate(Base):
     name: str | None = None
@@ -31,6 +31,14 @@ class AaGroupLink(Base, table=True):
     group_id: int | None = Field(default=None, foreign_key="groupdb.id", primary_key=True)
     accessauth_id: int | None = Field(default=None, foreign_key="accessauthorizationdb.id", primary_key=True)
 
+#### Token
+class Token(Base):
+    access_token: str
+    token_type: str
+
+class TokenData(Base):
+    username: str | None = None
+
 #### Group
 class GroupBase(Base):
     name: str = Field(index=True, unique=True)

app/services/auth.py

@@ -0,0 +1,93 @@
+from typing import Annotated
+from datetime import datetime, timedelta, timezone
+from fastapi import APIRouter, HTTPException, Depends, status
+from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
+from sqlmodel import Session
+from pwdlib import PasswordHash
+import jwt
+from jwt.exceptions import InvalidTokenError
+from ..model.models import UserDB, Token, TokenData
+from ..services.database import engine, get_session
+
+SECRET_KEY = "8b14d0b447bff7efa24d5019cc59a999786e31f6f865173bbd642bf18de5ad85" #Encrypt and change later or store in env file or somehthing
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_MINUTES = 30
+
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")
+
+token_router = APIRouter(tags=["Token"])
+
+password_hash = PasswordHash.recommended()
+
+def verify_password(plain_password, hashed_password):
+    return password_hash.verify(plain_password, hashed_password)
+
+def get_password_hash(password):
+    return password_hash.hash(password)
+
+def get_user(db, username: str):
+    user = db.get(UserDB, username)
+    if user is None:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Username not found in get_user, this shouldn't happen")
+    return user(**user.dict())
+
+def authenticate_user(db, username: str, password: str):
+    user = get_user(db, username)
+    if not user:
+        return False
+    if not verify_password(password, user.passwordhash):
+        return False
+    return user
+
+def create_access_token(data: dict, expires_delta: timedelta | None = None):
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.now(timezone.tzname("CET")) + expires_delta
+    else:
+        expire = datetime.now(timezone.tzname("CET")) + expires_delta(minutes=15)
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+    return encoded_jwt
+
+def get_current_user(token: Annotated[str, Depends(oauth2_scheme)]):
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"}
+    )
+    try:
+        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+        username = payload.get("sub")
+        if username is None:
+            raise credentials_exception
+        token_data = TokenData(username=username)
+    except InvalidTokenError:
+        raise credentials_exception
+    user = get_user(db, username=token_data.username)
+    if user is None:
+        raise credentials_exception
+    return user
+
+@token_router.post("/token")
+def login_for_access_token(
+    form_data: Annotated[OAuth2PasswordRequestForm, Depends()],
+    db: Session = Depends(get_session)
+) -> Token:
+    user = authenticate_user(db, form_data.username, form_data.password)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect username or pw",
+            headers={"WWW-Authenticate": "Bearer"}
+        )
+    access_token_expires = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
+    access_token = create_access_token(
+        data={"sub": user.username}, expires_delta=access_token_expires
+    )
+    return Token(access_token=access_token, token_type="bearer")
+
+@token_router.get("/test/login")
+def test_login(
+    current_user: Annotated[UserDB, Depends(get_current_user)]
+) -> UserDB:
+    return current_user

plan.txt

@@ -42,7 +42,14 @@ Plan:
         Erstelle gruppe
         Erstelle AA mit Timeslot
         Registriere karte -> gruppe
-        
+    
+    CRUD
+        create(post)
+        read(get)[all items]
+        read(get)[single item]
+        update(put/patch)
+        delete(delete)
+
     zeitplan
         Hier bin ich nicht sicher, ich denke an cron style für wiederholende dinge aber das kann nur zeitpunkte und keine blöcke.
         Villeicht ne liste von cron zeiten [ "0 16 * * 2" "0 18 * * 2" ](Wäre dienstag 16-18 uhr) - Ist aber warscheinlich schwer zu parsen