from pathlib import Path
from fastapi import APIRouter, HTTPException
from fastapi.responses import FileResponse, HTMLResponse, Response
from src.frontend_bundle import build_frontend
router = APIRouter()
DASHBOARD_FILE = Path(__file__).resolve().parent.parent / "frontend" / "index.html"
MANIFEST_FILE = DASHBOARD_FILE.parent / "manifest.webmanifest"
FRONTEND_BUILD = build_frontend(DASHBOARD_FILE.parent)
LOGIN_HTML = """
Sign in ยท Stackchain Dashboard
Operator sign in
Enter the dashboard access token. It is exchanged for a private, short-lived session and is never stored on this device.
"""
class RevalidatingHTMLResponse(HTMLResponse):
def __init__(self, content, status_code=200, headers=None, media_type=None, background=None):
response_headers = dict(headers or {})
response_headers["Cache-Control"] = "no-cache"
super().__init__(content, status_code, response_headers, media_type, background)
@router.get("/", response_class=RevalidatingHTMLResponse)
async def dashboard() -> str:
return FRONTEND_BUILD.dashboard_html
@router.get("/login", response_class=RevalidatingHTMLResponse)
async def login() -> str:
return LOGIN_HTML
@router.get("/manifest.webmanifest", response_class=FileResponse)
async def web_app_manifest() -> FileResponse:
return FileResponse(MANIFEST_FILE, media_type="application/manifest+json")
@router.get("/service-worker.js")
async def service_worker() -> Response:
return Response(
FRONTEND_BUILD.service_worker_source,
media_type="application/javascript",
headers={"Service-Worker-Allowed": "/", "Cache-Control": "no-cache"},
)
@router.get("/runtime-{digest}.js")
async def runtime_bundle(digest: str) -> Response:
if digest != FRONTEND_BUILD.runtime_digest:
raise HTTPException(status_code=404, detail="Runtime revision not found")
return Response(
FRONTEND_BUILD.runtime_bytes,
media_type="application/javascript",
headers={"Cache-Control": "public, max-age=31536000, immutable"},
)