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rzuastiandClaude Opus 4.7
bb677aeebf
The four polling status cards (ARP, mDNS, scanners summary, devices
summary) each rolled their own Timer/_status/_error/_isLoading state and
flipped to a red 'Error' UI on the first failed poll, throwing away
last-known-good data that was still in memory. A momentary backend blip
made every card flash red.
Introduce PolledValue<T>, a ChangeNotifier that owns the periodic timer,
in-flight CancelToken, last value, last error, and a freshness
classification (initialLoading / fresh / stale / error). 'stale' kicks in
on the first failure but keeps the value visible; 'error' only takes over
after staleErrorAfter elapses without a success (30s for the 5s scanner
polls, 3min for the 1min device-summary poll). All four cards now branch
on freshness and show a small live-updating warning icon with a tooltip
('Last updated N ago — <error>') while stale, instead of flipping red.
Also threads CancelToken? through the three polled GET endpoints.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
55 lines
1.3 KiB
Dart
55 lines
1.3 KiB
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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import '../utils/duration_formatter.dart';
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import '../utils/polled_value.dart';
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class PolledStaleIndicator extends StatefulWidget {
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const PolledStaleIndicator({super.key, required this.polled});
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final PolledValue polled;
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@override
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State<PolledStaleIndicator> createState() => _PolledStaleIndicatorState();
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}
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class _PolledStaleIndicatorState extends State<PolledStaleIndicator> {
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Timer? _ticker;
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@override
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void initState() {
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super.initState();
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_ticker = Timer.periodic(const Duration(seconds: 1), (_) {
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if (mounted) setState(() {});
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});
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}
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@override
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void dispose() {
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_ticker?.cancel();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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final lastSuccessAt = widget.polled.lastSuccessAt;
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final ago = lastSuccessAt != null
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? formatSeconds(
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DateTime.now().difference(lastSuccessAt).inSeconds.toDouble(),
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)
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: 'a while';
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final message = widget.polled.lastErrorMessage != null
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? 'Last updated $ago ago — ${widget.polled.lastErrorMessage}'
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: 'Last updated $ago ago';
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return Tooltip(
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message: message,
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child: Icon(
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Icons.warning_amber_rounded,
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size: 14,
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color: Theme.of(context).colorScheme.onSurfaceVariant,
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),
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);
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}
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}
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