feat: authentication — register, login, JWT, tests

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/api/auth.py

@@ -0,0 +1,38 @@
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.database import get_db
+from app.schemas.user import Token, UserCreate, UserLogin, UserResponse
+from app.services.auth import (
+    create_access_token,
+    create_user,
+    get_user_by_username,
+    verify_password,
+)
+from app.api.deps import get_current_user
+from app.models.user import User
+
+router = APIRouter(prefix="/api/auth", tags=["auth"])
+
+
+@router.post("/register", response_model=UserResponse, status_code=201)
+async def register(data: UserCreate, db: AsyncSession = Depends(get_db)):
+    existing = await get_user_by_username(db, data.username)
+    if existing:
+        raise HTTPException(status_code=400, detail="Username already taken")
+    user = await create_user(db, data.username, data.email, data.password)
+    return user
+
+
+@router.post("/login", response_model=Token)
+async def login(data: UserLogin, db: AsyncSession = Depends(get_db)):
+    user = await get_user_by_username(db, data.username)
+    if not user or not verify_password(data.password, user.password_hash):
+        raise HTTPException(status_code=401, detail="Invalid credentials")
+    token = create_access_token(str(user.id))
+    return Token(access_token=token)
+
+
+@router.get("/me", response_model=UserResponse)
+async def me(user: User = Depends(get_current_user)):
+    return user

backend/app/api/deps.py

@@ -0,0 +1,28 @@
+from fastapi import Depends, HTTPException, status
+from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.database import get_db
+from app.models.user import User
+from app.services.auth import decode_access_token
+
+security = HTTPBearer()
+
+
+async def get_current_user(
+    credentials: HTTPAuthorizationCredentials = Depends(security),
+    db: AsyncSession = Depends(get_db),
+) -> User:
+    user_id = decode_access_token(credentials.credentials)
+    if user_id is None:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token"
+        )
+    result = await db.execute(select(User).where(User.id == user_id))
+    user = result.scalar_one_or_none()
+    if user is None or not user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED, detail="User not found"
+        )
+    return user

backend/app/main.py

@@ -0,0 +1,19 @@
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI
+
+from app.api.auth import router as auth_router
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    yield
+
+
+app = FastAPI(title="Meeting Protocol Service", lifespan=lifespan)
+app.include_router(auth_router)
+
+
+@app.get("/api/health")
+async def health():
+    return {"status": "ok"}

backend/app/schemas/user.py

@@ -0,0 +1,33 @@
+import uuid
+from datetime import datetime
+
+from pydantic import BaseModel, EmailStr
+
+from app.models.user import UserRole
+
+
+class UserCreate(BaseModel):
+    username: str
+    email: str
+    password: str
+
+
+class UserLogin(BaseModel):
+    username: str
+    password: str
+
+
+class UserResponse(BaseModel):
+    id: uuid.UUID
+    username: str
+    email: str
+    role: UserRole
+    is_active: bool
+    created_at: datetime
+
+    model_config = {"from_attributes": True}
+
+
+class Token(BaseModel):
+    access_token: str
+    token_type: str = "bearer"

backend/app/services/auth.py

@@ -0,0 +1,52 @@
+from datetime import datetime, timedelta, timezone
+
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.config import settings
+from app.models.user import User
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+
+def hash_password(password: str) -> str:
+    return pwd_context.hash(password)
+
+
+def verify_password(plain: str, hashed: str) -> bool:
+    return pwd_context.verify(plain, hashed)
+
+
+def create_access_token(user_id: str) -> str:
+    expire = datetime.now(timezone.utc) + timedelta(minutes=settings.jwt_expire_minutes)
+    payload = {"sub": user_id, "exp": expire}
+    return jwt.encode(payload, settings.jwt_secret, algorithm=settings.jwt_algorithm)
+
+
+def decode_access_token(token: str) -> str | None:
+    try:
+        payload = jwt.decode(
+            token, settings.jwt_secret, algorithms=[settings.jwt_algorithm]
+        )
+        return payload.get("sub")
+    except JWTError:
+        return None
+
+
+async def get_user_by_username(db: AsyncSession, username: str) -> User | None:
+    result = await db.execute(select(User).where(User.username == username))
+    return result.scalar_one_or_none()
+
+
+async def create_user(db: AsyncSession, username: str, email: str, password: str) -> User:
+    user = User(
+        username=username,
+        email=email,
+        password_hash=hash_password(password),
+    )
+    db.add(user)
+    await db.commit()
+    await db.refresh(user)
+    return user