room_cal/room_cal/api/calc_app.py

import os
from pathlib import Path
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import HTMLResponse
from room_cal._utils import services as _services, service_name
from room_cal.api._routes.calc import router as _calc_router

_CALC_HTML = Path(__file__).parents[1] / 'vue' / 'calc.html'
_API_BASE = os.getenv('APP_BASE_URL', '').rstrip('/')

app = FastAPI(title='room_cal calc')
app.add_middleware(CORSMiddleware, allow_origins=['*'], allow_methods=['*'], allow_headers=['*'])
app.include_router(_calc_router)


@app.get('/services')
async def get_services():
  return [{'key': s, 'name': service_name(s)} for s in _services()]


@app.get('/', response_class=HTMLResponse, include_in_schema=False)
async def calc_ui():
  html = _CALC_HTML.read_text()
  return html.replace("const API_BASE = '';", f"const API_BASE = '{_API_BASE}';", 1)