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feat: add pause/resume transact method #55

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Merged
brax10ward merged 1 commit into from
Apr 17, 2026
Merged

feat: add pause/resume transact method #55

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22 changes: 22 additions & 0 deletions ...d/src/main/kotlin/atomic/financial/atomic_transact_flutter/AtomicTransactFlutterPlugin.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,9 @@ import io.flutter.plugin.common.MethodCall
import io.flutter.plugin.common.MethodChannel
import io.flutter.plugin.common.MethodChannel.MethodCallHandler
import io.flutter.plugin.common.MethodChannel.Result
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import org.json.JSONObject
import org.json.JSONArray

Expand All @@ -24,6 +27,7 @@ class AtomicTransactFlutterPlugin: FlutterPlugin, MethodCallHandler, ActivityAwa
/// when the Flutter Engine is detached from the Activity
private lateinit var channel : MethodChannel
private lateinit var activity : Activity
private var pausedTransactRef: PausedTransactRef? = null

override fun onAttachedToEngine(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
channel = MethodChannel(flutterPluginBinding.binaryMessenger, "atomic_transact_flutter")
Expand Down Expand Up @@ -138,6 +142,24 @@ class AtomicTransactFlutterPlugin: FlutterPlugin, MethodCallHandler, ActivityAwa
Transact.close(activity)
} else if (call.method == "hideTransact") {
Transact.hideTransact(activity)
} else if (call.method == "pauseTransact") {
CoroutineScope(Dispatchers.Main).launch {
try {
pausedTransactRef = Transact.pauseTransact()
result.success(null)
} catch (e: Transact.PauseTransactException) {
result.error("PauseTransactError", e.message, null)
}
}
} else if (call.method == "resumeTransact") {
val ref = pausedTransactRef
if (ref != null) {
ref.resume(activity)
pausedTransactRef = null
result.success(null)
} else {
result.error("ResumeTransactError", "No paused Transact to resume", null)
}
} else {
result.notImplemented()
}
Expand Down
8 changes: 8 additions & 0 deletions example/lib/models/app_state.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -58,6 +58,14 @@ class AppState extends ChangeNotifier {
bool get debug => _debug;
set debug(bool v) { _debug = v; notifyListeners(); }

bool _pauseAfterInit = false;
bool get pauseAfterInit => _pauseAfterInit;
set pauseAfterInit(bool v) { _pauseAfterInit = v; notifyListeners(); }

int _pauseDelaySeconds = 3;
int get pauseDelaySeconds => _pauseDelaySeconds;
set pauseDelaySeconds(int v) { _pauseDelaySeconds = v; notifyListeners(); }

// Pay Link
PayLinkTask _payLinkTask = PayLinkTask.switchPayment;
PayLinkTask get payLinkTask => _payLinkTask;
Expand Down
72 changes: 65 additions & 7 deletions example/lib/screens/pay_link_screen.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@ import 'company_login_screen.dart';
import '../widgets/public_token_banner.dart';
import '../widgets/select_grid.dart';

class PayLinkScreen extends StatelessWidget {
class PayLinkScreen extends StatefulWidget {
final AppState state;
final EventLog eventLog;
final VoidCallback onNavigateToSettings;
Expand All @@ -22,8 +22,30 @@ class PayLinkScreen extends StatelessWidget {
required this.onNavigateToSettings,
});

@override
State<PayLinkScreen> createState() => _PayLinkScreenState();
}

class _PayLinkScreenState extends State<PayLinkScreen> {
AppState get state => widget.state;
EventLog get eventLog => widget.eventLog;

bool _transactActive = false;
PausedTransactRef? _pausedRef;

void _onInitialize() {
final config = state.buildPayLinkConfig();
final shouldPause = state.pauseAfterInit;
final delaySeconds = state.pauseDelaySeconds;

setState(() {
_transactActive = true;
_pausedRef = null;
});

if (shouldPause) {
_schedulePause(delaySeconds);
}

Atomic.transact(
config: config,
Expand Down Expand Up @@ -75,6 +97,10 @@ class PayLinkScreen extends StatelessWidget {
));
},
onCompletion: (type, response, error) {
setState(() {
_transactActive = false;
_pausedRef = null;
});
if (type == AtomicTransactCompletionType.error) {
eventLog.add(EventEntry(
type: EventType.error,
Expand All @@ -99,6 +125,27 @@ class PayLinkScreen extends StatelessWidget {
);
}

void _schedulePause(int delaySeconds) {
Future.delayed(Duration(seconds: delaySeconds), () async {
if (!mounted || !_transactActive || _pausedRef != null) return;
try {
final ref = await Atomic.pauseTransact();
if (mounted) setState(() => _pausedRef = ref);
} catch (e) {
if (mounted) {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(content: Text('Failed to pause: $e')),
);
}
}
});
}

Future<void> _onResume() async {
await _pausedRef?.resume();
setState(() => _pausedRef = null);
}

void _showConfigPreview(BuildContext context) {
final config = state.buildPayLinkConfig();
final json = const JsonEncoder.withIndent(' ').convert(config.toJson());
Expand Down Expand Up @@ -152,6 +199,21 @@ class PayLinkScreen extends StatelessWidget {
);
}

Widget _buildBottomButtons() {
if (_pausedRef != null) {
return FullWidthButton(
text: 'Resume',
onPressed: _onResume,
);
}
final label = state.pauseAfterInit ? 'Initialize and Pause' : 'Initialize';
return FullWidthButton(
text: label,
enabled: state.publicToken.isNotEmpty && !_transactActive,
onPressed: _onInitialize,
);
}

@override
Widget build(BuildContext context) {
return Column(
Expand All @@ -172,7 +234,7 @@ class PayLinkScreen extends StatelessWidget {
children: [
PublicTokenBanner(
publicToken: state.publicToken,
onNavigateToSettings: onNavigateToSettings,
onNavigateToSettings: widget.onNavigateToSettings,
),
SingleSelectGrid<PayLinkTask>(
title: 'Task',
Expand Down Expand Up @@ -214,11 +276,7 @@ class PayLinkScreen extends StatelessWidget {
),
),
),
FullWidthButton(
text: 'Initialize',
enabled: state.publicToken.isNotEmpty,
onPressed: _onInitialize,
),
_buildBottomButtons(),
const SizedBox(height: 16),
],
);
Expand Down
60 changes: 60 additions & 0 deletions example/lib/screens/settings_screen.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,21 @@ class SettingsScreen extends StatelessWidget {
value: state.debug,
onChanged: (v) => state.debug = v,
),
const SizedBox(height: 16),
const Divider(indent: 16, endIndent: 16),
const SizedBox(height: 8),
const SectionHeader('Pause'),
ToggleRow(
title: 'Pause After Initialize',
subtitle: 'Automatically pause Transact after a delay',
value: state.pauseAfterInit,
onChanged: (v) => state.pauseAfterInit = v,
),
if (state.pauseAfterInit)
_PauseDelayPicker(
seconds: state.pauseDelaySeconds,
onChanged: (v) => state.pauseDelaySeconds = v,
),
const SizedBox(height: 32),
],
),
Expand Down Expand Up @@ -107,3 +122,48 @@ class _UrlModeSelector extends StatelessWidget {
);
}
}

class _PauseDelayPicker extends StatelessWidget {
final int seconds;
final ValueChanged<int> onChanged;

const _PauseDelayPicker({required this.seconds, required this.onChanged});

static const _options = [1, 2, 3, 5, 10, 15, 30];

@override
Widget build(BuildContext context) {
return Padding(
padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
'Delay (seconds)',
style: TextStyle(fontSize: 14, color: atomicOnSurfaceVariant),
),
const SizedBox(height: 8),
Wrap(
spacing: 8,
children: _options.map((s) {
final selected = s == seconds;
return ChoiceChip(
label: Text('${s}s'),
selected: selected,
onSelected: (_) => onChanged(s),
selectedColor: atomicPurple,
backgroundColor: atomicSurface,
side: BorderSide(
color: selected ? atomicPurple : atomicOutline,
),
labelStyle: TextStyle(
color: selected ? Colors.white : atomicOnBackground,
),
);
}).toList(),
),
],
),
);
}
}
72 changes: 65 additions & 7 deletions example/lib/screens/user_link_screen.dart
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@ import '../widgets/public_token_banner.dart';
import '../widgets/select_grid.dart';
import 'company_login_screen.dart';

class UserLinkScreen extends StatelessWidget {
class UserLinkScreen extends StatefulWidget {
final AppState state;
final EventLog eventLog;
final VoidCallback onNavigateToSettings;
Expand All @@ -22,8 +22,30 @@ class UserLinkScreen extends StatelessWidget {
required this.onNavigateToSettings,
});

@override
State<UserLinkScreen> createState() => _UserLinkScreenState();
}

class _UserLinkScreenState extends State<UserLinkScreen> {
AppState get state => widget.state;
EventLog get eventLog => widget.eventLog;

bool _transactActive = false;
PausedTransactRef? _pausedRef;

void _onInitialize() {
final config = state.buildUserLinkConfig();
final shouldPause = state.pauseAfterInit;
final delaySeconds = state.pauseDelaySeconds;

setState(() {
_transactActive = true;
_pausedRef = null;
});

if (shouldPause) {
_schedulePause(delaySeconds);
}

Atomic.transact(
config: config,
Expand Down Expand Up @@ -66,6 +88,10 @@ class UserLinkScreen extends StatelessWidget {
));
},
onCompletion: (type, response, error) {
setState(() {
_transactActive = false;
_pausedRef = null;
});
if (type == AtomicTransactCompletionType.error) {
eventLog.add(EventEntry(
type: EventType.error,
Expand All @@ -89,6 +115,27 @@ class UserLinkScreen extends StatelessWidget {
);
}

void _schedulePause(int delaySeconds) {
Future.delayed(Duration(seconds: delaySeconds), () async {
if (!mounted || !_transactActive || _pausedRef != null) return;
try {
final ref = await Atomic.pauseTransact();
if (mounted) setState(() => _pausedRef = ref);
} catch (e) {
if (mounted) {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(content: Text('Failed to pause: $e')),
);
}
}
});
}

Future<void> _onResume() async {
await _pausedRef?.resume();
setState(() => _pausedRef = null);
}

void _showConfigPreview(BuildContext context) {
final config = state.buildUserLinkConfig();
final json = const JsonEncoder.withIndent(' ').convert(config.toJson());
Expand Down Expand Up @@ -142,6 +189,21 @@ class UserLinkScreen extends StatelessWidget {
);
}

Widget _buildBottomButtons() {
if (_pausedRef != null) {
return FullWidthButton(
text: 'Resume',
onPressed: _onResume,
);
}
final label = state.pauseAfterInit ? 'Initialize and Pause' : 'Initialize';
return FullWidthButton(
text: label,
enabled: state.publicToken.isNotEmpty && !_transactActive,
onPressed: _onInitialize,
);
}

@override
Widget build(BuildContext context) {
return Column(
Expand All @@ -162,7 +224,7 @@ class UserLinkScreen extends StatelessWidget {
children: [
PublicTokenBanner(
publicToken: state.publicToken,
onNavigateToSettings: onNavigateToSettings,
onNavigateToSettings: widget.onNavigateToSettings,
),
SingleSelectGrid<UserLinkTask>(
title: 'Task',
Expand Down Expand Up @@ -204,11 +266,7 @@ class UserLinkScreen extends StatelessWidget {
),
),
),
FullWidthButton(
text: 'Initialize',
enabled: state.publicToken.isNotEmpty,
onPressed: _onInitialize,
),
_buildBottomButtons(),
const SizedBox(height: 16),
],
);
Expand Down
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