feat(app,ui): sync waits on mobile data and asks first

The developer's request of 10 Nov 2026, decided in ADR 0042: on mobile
data every app holds its sync back, rows and files alike, and asks.

halkyon_app becomes an Android plugin, its first native code, registered
in every app by Flutter: HalkyonAppPlugin.java says which network the
device is on and whether it is metered as Android has it (no
NET_CAPABILITY_NOT_METERED: cellular, a phone's hotspot, Wi-Fi marked
metered). Java, so it applies no Kotlin Gradle Plugin.

MobileDataGate, one per device, holds the setting (Ask first, Sync
without files, Sync everything; kept in <app support>/mobile_data.json),
the network, and the person's answer, which holds until the device moves
to another network or off a metered one. SyncService asks it before each
sync: held back, nothing goes, the status counts what waits and asks; an
answer or Wi-Fi syncs at once, and syncing now while held back is Sync
now. Each app's frame shows the banner above every tab, in halkyon_ui's
new NavigationFrame.banner slot (On mobile data · 3 changes waiting, with
Not now, Without files and Sync now); the Sync card in Settings chooses
the setting on a phone and says when files wait for Wi-Fi. Learn's files
neither go up nor come down while held back.

Whats-New: On mobile data the app no longer syncs by itself: a banner asks first, and Settings › Sync chooses whether to ask, sync without files, or sync everything.
Whats-New-De: Mit mobilen Daten synchronisiert die App nicht mehr von selbst: Ein Hinweis fragt zuerst, und unter Einstellungen › Synchronisierung wählst du, ob sie fragt, ohne Dateien oder alles synchronisiert.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
This commit is contained in:
Tizian 「ティツィアーン」 2026-11-10 23:38:17 +01:00
commit 59fb9c4d6d
Signed by: raisondetredev
GPG key ID: 07F6FCF405488B64

View file

@ -1,3 +1,5 @@
import 'dart:async';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:halkyon_app/halkyon_app.dart';
@ -168,4 +170,122 @@ void main() {
expect(find.textContaining('Update it to keep syncing'), findsNothing);
});
group('on mobile data (ADR 0042)', () {
late FakeNetworkWatch network;
late int syncs;
/// Shows the banner above the Sync card, on a phone ([offered]) on
/// mobile data, sync started; [changes] made here wait.
Future<(SyncService, MobileDataGate)> showPhone(
WidgetTester tester, {
bool offered = true,
int changes = 0,
}) async {
final gate = MobileDataGate(network: network, offered: offered);
addTearDown(gate.dispose);
final sync = SyncService(({required onMerge}) async {
syncs++;
}, mobileData: gate)..start();
for (var change = 0; change < changes; change++) {
sync.requestSync();
}
await tester.pumpWidget(
BlocProvider(
create: (context) =>
SyncStatusBloc(sync)..add(const SyncStatusEventStarted()),
child: testApp(
Scaffold(
body: Builder(
builder: (context) => Column(
children: [
?mobileDataBannerOf(context),
const Expanded(
child: SingleChildScrollView(child: SyncStatusCard()),
),
],
),
),
),
dependencies: TestAppDependencies(),
),
),
);
await tester.pump(const Duration(seconds: 3));
await tester.pumpAndSettle();
return (sync, gate);
}
setUp(() {
network = FakeNetworkWatch()..state = FakeNetworkWatch.mobile;
syncs = 0;
});
testWidgets('the banner counts the changes waiting; Not now puts it off '
'until another waits', (tester) async {
final (sync, _) = await showPhone(tester, changes: 2);
expect(find.text('On mobile data · 2 changes waiting'), findsOneWidget);
expect(find.text('Held back on mobile data'), findsOneWidget);
expect(syncs, 0);
await tester.tap(find.text('Not now'));
await tester.pumpAndSettle();
expect(find.byType(MobileDataBanner), findsNothing);
sync.requestSync();
await tester.pump(const Duration(seconds: 3));
await tester.pumpAndSettle();
expect(find.text('On mobile data · 3 changes waiting'), findsOneWidget);
expect(syncs, 0);
unawaited(sync.dispose());
});
testWidgets('Sync now syncs and the banner goes', (tester) async {
final (sync, _) = await showPhone(tester);
expect(find.text('On mobile data · sync paused'), findsOneWidget);
await tester.tap(find.text('Sync now').first);
await tester.pumpAndSettle();
expect(syncs, 1);
expect(find.byType(MobileDataBanner), findsNothing);
unawaited(sync.dispose());
});
testWidgets('Without files syncs, and the Sync card says the files wait', (
tester,
) async {
final (sync, _) = await showPhone(tester);
await tester.tap(find.text('Without files'));
await tester.pumpAndSettle();
expect(syncs, 1);
expect(find.byType(MobileDataBanner), findsNothing);
expect(find.text('Files wait for Wi-Fi'), findsOneWidget);
unawaited(sync.dispose());
});
testWidgets('the Sync card chooses what goes unasked; Sync everything '
"syncs and doesn't ask", (tester) async {
final (sync, gate) = await showPhone(tester);
expect(find.text('Ask first'), findsOneWidget);
await tester.tap(find.text('Ask first'));
await tester.pumpAndSettle();
await tester.tap(find.text('Sync everything').last);
await tester.pumpAndSettle();
expect(gate.mobileData, MobileData.everything);
expect(syncs, 1);
expect(find.byType(MobileDataBanner), findsNothing);
unawaited(sync.dispose());
});
testWidgets('a desktop shows no banner and no choice', (tester) async {
network.state = FakeNetworkWatch.wifi;
final (sync, _) = await showPhone(tester, offered: false);
expect(find.byType(MobileDataBanner), findsNothing);
expect(find.text('On mobile data'), findsNothing);
expect(syncs, 1);
unawaited(sync.dispose());
});
});
}