325 lines
8.5 KiB
Python
325 lines
8.5 KiB
Python
from contextlib import asynccontextmanager
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from datetime import datetime
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from typing import Any, Callable, Generic, TypeVar
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from fastapi import FastAPI, Depends, HTTPException, Response, status, Query
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from fastapi.middleware.cors import CORSMiddleware
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from pydantic import BaseModel
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from sqlalchemy import select, func, desc
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from sqlalchemy.ext.asyncio import AsyncSession
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from database import engine, get_db, Base
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from models import Counter, User, SumRecord, CounterRecord, Permission, Role, ROLE_REGULAR
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R = TypeVar("R", bound=BaseModel)
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async def paginate_with_user_email(
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db: AsyncSession,
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model: type[SumRecord] | type[CounterRecord],
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page: int,
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per_page: int,
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row_mapper: Callable[..., R],
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) -> tuple[list[R], int, int]:
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"""
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Generic pagination helper for audit records that need user email.
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Returns: (records, total, total_pages)
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"""
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# Get total count
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count_result = await db.execute(select(func.count(model.id)))
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total = count_result.scalar() or 0
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total_pages = (total + per_page - 1) // per_page if total > 0 else 1
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# Get paginated records with user email
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offset = (page - 1) * per_page
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query = (
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select(model, User.email)
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.join(User, model.user_id == User.id)
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.order_by(desc(model.created_at))
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.offset(offset)
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.limit(per_page)
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)
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result = await db.execute(query)
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rows = result.all()
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records: list[R] = [row_mapper(record, email) for record, email in rows]
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return records, total, total_pages
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from auth import (
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ACCESS_TOKEN_EXPIRE_MINUTES,
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COOKIE_NAME,
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UserCreate,
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UserLogin,
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UserResponse,
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get_password_hash,
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get_user_by_email,
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authenticate_user,
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create_access_token,
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get_current_user,
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require_permission,
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build_user_response,
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)
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@asynccontextmanager
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async def lifespan(app: FastAPI):
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async with engine.begin() as conn:
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await conn.run_sync(Base.metadata.create_all)
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yield
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app = FastAPI(lifespan=lifespan)
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app.add_middleware(
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CORSMiddleware,
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allow_origins=["http://localhost:3000"],
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allow_methods=["*"],
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allow_headers=["*"],
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allow_credentials=True,
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)
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def set_auth_cookie(response: Response, token: str) -> None:
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response.set_cookie(
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key=COOKIE_NAME,
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value=token,
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httponly=True,
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secure=False, # Set to True in production with HTTPS
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samesite="lax",
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max_age=ACCESS_TOKEN_EXPIRE_MINUTES * 60,
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)
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async def get_default_role(db: AsyncSession) -> Role | None:
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"""Get the default 'regular' role for new users."""
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result = await db.execute(select(Role).where(Role.name == ROLE_REGULAR))
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return result.scalar_one_or_none()
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# Auth endpoints
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@app.post("/api/auth/register", response_model=UserResponse)
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async def register(
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user_data: UserCreate,
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response: Response,
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db: AsyncSession = Depends(get_db),
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):
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existing_user = await get_user_by_email(db, user_data.email)
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if existing_user:
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raise HTTPException(
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status_code=status.HTTP_400_BAD_REQUEST,
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detail="Email already registered",
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)
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user = User(
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email=user_data.email,
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hashed_password=get_password_hash(user_data.password),
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)
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# Assign default role if it exists
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default_role = await get_default_role(db)
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if default_role:
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user.roles.append(default_role)
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db.add(user)
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await db.commit()
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await db.refresh(user)
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access_token = create_access_token(data={"sub": str(user.id)})
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set_auth_cookie(response, access_token)
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return await build_user_response(user, db)
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@app.post("/api/auth/login", response_model=UserResponse)
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async def login(
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user_data: UserLogin,
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response: Response,
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db: AsyncSession = Depends(get_db),
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):
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user = await authenticate_user(db, user_data.email, user_data.password)
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if not user:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Incorrect email or password",
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)
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access_token = create_access_token(data={"sub": str(user.id)})
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set_auth_cookie(response, access_token)
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return await build_user_response(user, db)
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@app.post("/api/auth/logout")
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async def logout(response: Response):
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response.delete_cookie(key=COOKIE_NAME)
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return {"ok": True}
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@app.get("/api/auth/me", response_model=UserResponse)
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async def get_me(
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current_user: User = Depends(get_current_user),
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db: AsyncSession = Depends(get_db),
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):
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return await build_user_response(current_user, db)
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# Counter endpoints
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async def get_or_create_counter(db: AsyncSession) -> Counter:
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result = await db.execute(select(Counter).where(Counter.id == 1))
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counter = result.scalar_one_or_none()
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if not counter:
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counter = Counter(id=1, value=0)
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db.add(counter)
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await db.commit()
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await db.refresh(counter)
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return counter
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@app.get("/api/counter")
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async def get_counter(
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db: AsyncSession = Depends(get_db),
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_current_user: User = Depends(require_permission(Permission.VIEW_COUNTER)),
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):
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counter = await get_or_create_counter(db)
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return {"value": counter.value}
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@app.post("/api/counter/increment")
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async def increment_counter(
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db: AsyncSession = Depends(get_db),
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current_user: User = Depends(require_permission(Permission.INCREMENT_COUNTER)),
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):
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counter = await get_or_create_counter(db)
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value_before = counter.value
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counter.value += 1
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record = CounterRecord(
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user_id=current_user.id,
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value_before=value_before,
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value_after=counter.value,
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)
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db.add(record)
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await db.commit()
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return {"value": counter.value}
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# Sum endpoints
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class SumRequest(BaseModel):
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a: float
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b: float
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class SumResponse(BaseModel):
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a: float
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b: float
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result: float
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@app.post("/api/sum", response_model=SumResponse)
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async def calculate_sum(
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data: SumRequest,
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db: AsyncSession = Depends(get_db),
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current_user: User = Depends(require_permission(Permission.USE_SUM)),
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):
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result = data.a + data.b
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record = SumRecord(
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user_id=current_user.id,
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a=data.a,
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b=data.b,
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result=result,
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)
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db.add(record)
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await db.commit()
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return SumResponse(a=data.a, b=data.b, result=result)
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# Audit endpoints
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class CounterRecordResponse(BaseModel):
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id: int
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user_email: str
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value_before: int
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value_after: int
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created_at: datetime
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class SumRecordResponse(BaseModel):
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id: int
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user_email: str
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a: float
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b: float
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result: float
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created_at: datetime
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RecordT = TypeVar("RecordT", bound=BaseModel)
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class PaginatedResponse(BaseModel, Generic[RecordT]):
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"""Generic paginated response wrapper."""
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records: list[RecordT]
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total: int
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page: int
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per_page: int
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total_pages: int
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PaginatedCounterRecords = PaginatedResponse[CounterRecordResponse]
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PaginatedSumRecords = PaginatedResponse[SumRecordResponse]
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def _map_counter_record(record: CounterRecord, email: str) -> CounterRecordResponse:
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return CounterRecordResponse(
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id=record.id,
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user_email=email,
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value_before=record.value_before,
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value_after=record.value_after,
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created_at=record.created_at,
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)
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@app.get("/api/audit/counter", response_model=PaginatedCounterRecords)
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async def get_counter_records(
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page: int = Query(1, ge=1),
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per_page: int = Query(10, ge=1, le=100),
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db: AsyncSession = Depends(get_db),
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_current_user: User = Depends(require_permission(Permission.VIEW_AUDIT)),
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):
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records, total, total_pages = await paginate_with_user_email(
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db, CounterRecord, page, per_page, _map_counter_record
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)
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return PaginatedCounterRecords(
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records=records,
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total=total,
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page=page,
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per_page=per_page,
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total_pages=total_pages,
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)
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def _map_sum_record(record: SumRecord, email: str) -> SumRecordResponse:
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return SumRecordResponse(
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id=record.id,
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user_email=email,
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a=record.a,
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b=record.b,
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result=record.result,
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created_at=record.created_at,
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)
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@app.get("/api/audit/sum", response_model=PaginatedSumRecords)
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async def get_sum_records(
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page: int = Query(1, ge=1),
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per_page: int = Query(10, ge=1, le=100),
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db: AsyncSession = Depends(get_db),
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_current_user: User = Depends(require_permission(Permission.VIEW_AUDIT)),
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):
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records, total, total_pages = await paginate_with_user_email(
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db, SumRecord, page, per_page, _map_sum_record
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)
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return PaginatedSumRecords(
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records=records,
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total=total,
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page=page,
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per_page=per_page,
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total_pages=total_pages,
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)
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