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Ntrip beállítások sheet, ntrip státusz sheet

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This commit is contained in:
gitea_admin
2026-07-05 15:48:33 +02:00
parent fa25a320eb
commit 2bd39fbd4e
6 changed files with 629 additions and 42 deletions
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lib/pages/map_survey/presentations/views/settings_dialog.dart
+2 -2
View File
@@ -330,7 +330,7 @@ class SettingsDialog extends StatelessWidget {
SizedBox(
height: 40,
child: TextField(
controller: NtripService.to.usernameController,
//controller: NtripService.to.usernameController,
enableSuggestions: false,
autocorrect: false,
decoration: InputDecoration(
@@ -355,7 +355,7 @@ class SettingsDialog extends StatelessWidget {
//focusNode: controller.passwordFieldFocusNode,
enableSuggestions: false,
autocorrect: false,
controller: NtripService.to.passwordController,
//controller: NtripService.to.passwordController,
decoration: InputDecoration(
floatingLabelBehavior: FloatingLabelBehavior.never,
isDense: true,
lib/pages/ntrip_settings/presentation/controllers/ntrip_settings_controller.dart
+38
View File
@@ -116,4 +116,42 @@ class NtripSettingsController extends GetxController {
passwordController.dispose();
super.onClose();
}
/// „Kapcsolat tesztelése" — vevő nélkül is fut: mentés után csatlakozik,
/// validálja a caster válaszát, majd azonnal bont.
Future<void> testConnection() async {
try {
isBusy.value = true;
if (!await _validateAndSave()) return;
final message = await _service.testConnection();
Get.snackbar(
'NTRIP teszt sikeres',
message,
snackPosition: SnackPosition.BOTTOM,
backgroundColor: const Color(0xFF2E7D32),
colorText: const Color(0xFFFFFFFF),
duration: const Duration(seconds: 4),
);
} on NtripException catch (e) {
Get.snackbar(
'NTRIP teszt sikertelen',
e.message,
snackPosition: SnackPosition.BOTTOM,
backgroundColor: const Color(0xFFB71C1C),
colorText: const Color(0xFFFFFFFF),
duration: const Duration(seconds: 4),
);
} catch (e) {
Get.snackbar(
'NTRIP teszt sikertelen',
e.toString(),
snackPosition: SnackPosition.BOTTOM,
backgroundColor: const Color(0xFFB71C1C),
colorText: const Color(0xFFFFFFFF),
);
} finally {
isBusy.value = false;
}
}
}
lib/pages/ntrip_settings/presentation/views/ntrip_settings_sheet.dart
+10 -1
View File
@@ -157,7 +157,7 @@ class NtripSettingsSheet extends GetView<NtripSettingsController> {
contentPadding: EdgeInsets.zero,
title: const Text('Automatikus kapcsolódás'),
subtitle: const Text(
'Az app indításakor próbáljon NTRIP-re kapcsolódni.',
'RTK képes vevő csatlakozásakor próbáljon automatikusan NTRIP-re kapcsolódni.',
),
value: controller.autoConnect.value,
onChanged: (value) {
@@ -216,6 +216,15 @@ class NtripSettingsSheet extends GetView<NtripSettingsController> {
child: const Text('Csak mentés'),
),
),
SizedBox(
width: double.infinity,
child: Obx(() => OutlinedButton.icon(
onPressed: controller.isBusy.value
? null
: controller.testConnection,
icon: const Icon(Icons.network_check, size: 18),
label: const Text(
'Kapcsolat tesztelése (vevő nélkül)'))))
],
),
),
lib/services/ntrip_service.dart
+99 -36
View File
@@ -9,6 +9,9 @@ import 'package:flutter/material.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:get/get.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:terepi_seged/services/gnss/gnss_connection.dart';
import 'package:terepi_seged/services/gnss/gnss_device_service.dart';
import 'package:terepi_seged/services/gnss/gnss_service.dart';
class NtripException implements Exception {
final String message;
@@ -37,6 +40,9 @@ class NtripService extends GetxService {
final ggaLastSentTime = ''.obs;
final lastError = ''.obs;
final lastRtcmAt = Rxn<DateTime>();
final connectedSince = Rxn<DateTime>();
// ── Beállítások ───────────────────────────────────────────────────
final host = ''.obs; // gnssnet.hu IP
final port = 2101.obs;
@@ -48,12 +54,12 @@ class NtripService extends GetxService {
bool get hasCompleteSettings =>
host.value.trim().isNotEmpty && mountpoint.value.trim().isNotEmpty;
// ── UI controllerek (beállítás dialóghoz) ────────────────────────
final hostController = TextEditingController();
final portController = TextEditingController();
final mountpointController = TextEditingController();
final usernameController = TextEditingController();
final passwordController = TextEditingController();
// // ── UI controllerek (beállítás dialóghoz) ────────────────────────
// final hostController = TextEditingController();
// final portController = TextEditingController();
// final mountpointController = TextEditingController();
// final usernameController = TextEditingController();
// final passwordController = TextEditingController();
// ── Belső állapot ────────────────────────────────────────────────
static const _secure = FlutterSecureStorage();
@@ -76,23 +82,61 @@ class NtripService extends GetxService {
Future<void> onInit() async {
super.onInit();
await _loadSettings();
_syncControllersFromValues();
// _syncControllersFromValues();
_wireGnssListener();
}
if (autoConnect.value && hasCompleteSettings) {
unawaited(connect().catchError((e) {
lastError.value = e.toString();
}));
void _wireGnssListener() {
if (!Get.isRegistered<GnssService>()) {
Future.delayed(const Duration(seconds: 2), _wireGnssListener);
}
ever<GnssConnectionState>(GnssService.to.connectionState, (state) {
if (state == GnssConnectionState.connected) {
final type = GnssService.to.activeConnectionType.value;
final isExternal = type == GnssConnectionType.btSerial ||
type == GnssConnectionType.ble;
if (isExternal &&
autoConnect.value &&
hasCompleteSettings &&
!isConnected.value) {
unawaited(connect().catchError((e) {
lastError.value = e.tostring();
}));
}
} else if (state == GnssConnectionState.disconnected ||
state == GnssConnectionState.error) {
if (isConnected.value) {
unawaited(disconnect());
}
}
});
}
void _ensureReceiverReady() {
if (!Get.isRegistered<GnssService>() ||
GnssService.to.connectionState.value != GnssConnectionState.connected) {
throw NtripException(
'Nincs csatlakoztatott GNSS vevő - előbb csatlakozz az eszközhöz, '
'utána indítható az NTRIP korrekció.');
}
final type = GnssService.to.activeConnectionType.value;
if (type == GnssConnectionType.phoneGps) {
throw NtripException(
'A telefon beépített GPS-e nem tud RTK korrekciókat fogadni - '
'az NTRIP használatához külső GNSS vevő szükséges');
}
}
@override
void onClose() {
disconnect();
hostController.dispose();
portController.dispose();
mountpointController.dispose();
usernameController.dispose();
passwordController.dispose();
// hostController.dispose();
// portController.dispose();
// mountpointController.dispose();
// usernameController.dispose();
// passwordController.dispose();
super.onClose();
}
@@ -101,11 +145,14 @@ class NtripService extends GetxService {
/// Kapcsolódás a casterhez. Megvárja a caster válaszát, és
/// [NtripException]-t dob értelmes üzenettel, ha valami nem stimmel
/// (rossz jelszó, rossz mountpoint, időtúllépés, hálózati hiba).
Future<void> connect() async {
Future<void> connect({bool bypassReceiverCheck = false}) async {
if (isConnected.value) return;
if (!hasCompleteSettings) {
throw NtripException('Hiányzó NTRIP beállítások (host / mountpoint).');
}
if (!bypassReceiverCheck) {
_ensureReceiverReady();
}
lastError.value = '';
_headerValidated = false;
@@ -140,6 +187,7 @@ class NtripService extends GetxService {
);
isConnected.value = true;
connectedSince.value = DateTime.now();
} on NtripException {
await _teardown();
rethrow;
@@ -165,6 +213,8 @@ class NtripService extends GetxService {
_socket?.destroy();
_socket = null;
isConnected.value = false;
connectedSince.value = null;
lastRtcmAt.value = null;
_headerValidated = false;
_headerBytes.clear();
}
@@ -175,6 +225,19 @@ class NtripService extends GetxService {
await connect();
}
Future<String> testConnection() async {
if (isConnected.value) {
throw NtripException('Már van élő NTRIP kapcsolat.');
}
try {
await connect(bypassReceiverCheck: true);
return 'A caster elfogadta a kapcsolatot - '
'a beállítások (jelszó, mountpoint) rendben vannak.';
} finally {
await disconnect();
}
}
// ── GGA küldés ───────────────────────────────────────────────────
/// Az NMEA feldolgozó hívja minden GGA mondatnál.
@@ -365,7 +428,7 @@ class NtripService extends GetxService {
this.password.value = password;
if (autoConnect != null) this.autoConnect.value = autoConnect;
_syncControllersFromValues();
// _syncControllersFromValues();
final prefs = await SharedPreferences.getInstance();
await prefs.setString('ntrip_host', this.host.value);
@@ -380,17 +443,17 @@ class NtripService extends GetxService {
await prefs.remove('ntrip_password');
}
Future<void> saveSettings() async {
await updateSettings(
host: hostController.text,
port: int.tryParse(portController.text) ?? 2101,
mountpoint: mountpointController.text,
username: usernameController.text,
password: passwordController.text.isNotEmpty
? passwordController.text
: password.value,
);
}
// Future<void> saveSettings() async {
// await updateSettings(
// host: hostController.text,
// port: int.tryParse(portController.text) ?? 2101,
// mountpoint: mountpointController.text,
// username: usernameController.text,
// password: passwordController.text.isNotEmpty
// ? passwordController.text
// : password.value,
// );
// }
Future<void> _loadSettings() async {
final prefs = await SharedPreferences.getInstance();
@@ -402,13 +465,13 @@ class NtripService extends GetxService {
autoConnect.value = prefs.getBool('ntrip_auto_connect') ?? false;
}
void _syncControllersFromValues() {
hostController.text = host.value;
portController.text = port.value.toString();
mountpointController.text = mountpoint.value;
usernameController.text = username.value;
// Jelszót nem pre-töltjük biztonsági okokból
}
// void _syncControllersFromValues() {
// hostController.text = host.value;
// portController.text = port.value.toString();
// mountpointController.text = mountpoint.value;
// usernameController.text = username.value;
// // Jelszót nem pre-töltjük biztonsági okokból
// }
// ── Segédfüggvények ──────────────────────────────────────────────
lib/widgets/appbar/shell_map_appbar.dart
+2 -3
View File
@@ -12,6 +12,7 @@ import 'package:terepi_seged/services/ntrip_service.dart';
import 'package:terepi_seged/widgets/appbar/gnss_status_strip.dart';
import 'package:terepi_seged/widgets/gnss_status_chip.dart';
import 'package:terepi_seged/widgets/map_mode_menu_anchor.dart';
import 'package:terepi_seged/widgets/ntrip_status_sheet.dart';
import 'package:terepi_seged/widgets/tracking/track_recording_action.dart';
import '../tracking/tracking_sheet.dart';
@@ -103,9 +104,7 @@ class ShellMapAppBar extends StatelessWidget implements PreferredSizeWidget {
NtripIconStatusChip(
isConnected: NtripService.to.isConnected,
onToggle: () {
NtripService.to.isConnected.value
? NtripService.to.disconnect()
: NtripService.to.connect();
NtripStatusSheet.show();
},
onSettings: () {
HapticFeedback.mediumImpact();
lib/widgets/ntrip_status_sheet.dart
+478
View File
@@ -0,0 +1,478 @@
import 'dart:async';
import 'dart:math' as math;
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import '../pages/ntrip_settings/presentation/views/ntrip_settings_sheet.dart';
import '../services/gnss/gnss_connection.dart';
import '../services/gnss/gnss_device_service.dart';
import '../services/gnss/gnss_service.dart';
import '../services/ntrip_service.dart';
/// NTRIP állapotkártya — bottom sheet.
///
/// A mérnök két kérdésére válaszol:
/// 1. „Jön a korrekció?" → kapcsolat, KORREKCIÓ KORA (a legfontosabb
/// egészség-metrika: élő TCP mellett is kiderül, ha az adat elakadt),
/// adatforgalom, GGA-küldés.
/// 2. „Lett belőle RTK fix?" → fix típusa + becsült hiba a GNSS oldalról.
///
/// Megnyitás: az appbar NTRIP-chipjére koppintva (NtripStatusSheet.show()).
class NtripStatusSheet extends StatefulWidget {
const NtripStatusSheet({super.key});
static Future<void> show() {
return Get.bottomSheet(
const NtripStatusSheet(),
isScrollControlled: true,
);
}
@override
State<NtripStatusSheet> createState() => _NtripStatusSheetState();
}
class _NtripStatusSheetState extends State<NtripStatusSheet> {
Timer? _ticker;
bool _busy = false;
@override
void initState() {
super.initState();
// Másodpercenkénti frissítés a "korrekció kora" / időtartam számláláshoz.
_ticker = Timer.periodic(const Duration(seconds: 1), (_) {
if (mounted) setState(() {});
});
}
@override
void dispose() {
_ticker?.cancel();
super.dispose();
}
Future<void> _toggleConnection() async {
final ntrip = NtripService.to;
setState(() => _busy = true);
try {
if (ntrip.isConnected.value) {
await ntrip.disconnect();
} else {
await ntrip.connect();
Get.snackbar('NTRIP', 'Kapcsolódva: ${ntrip.mountpoint.value}',
snackPosition: SnackPosition.BOTTOM,
backgroundColor: const Color(0xFF2E7D32),
colorText: const Color(0xFFFFFFFF));
}
} on NtripException catch (e) {
Get.snackbar('NTRIP', e.message,
snackPosition: SnackPosition.BOTTOM,
backgroundColor: const Color(0xFFB71C1C),
colorText: const Color(0xFFFFFFFF),
duration: const Duration(seconds: 4));
} catch (e) {
Get.snackbar('NTRIP', e.toString(),
snackPosition: SnackPosition.BOTTOM,
backgroundColor: const Color(0xFFB71C1C),
colorText: const Color(0xFFFFFFFF));
} finally {
if (mounted) setState(() => _busy = false);
}
}
@override
Widget build(BuildContext context) {
final colorScheme = Theme.of(context).colorScheme;
return SafeArea(
top: false,
child: Material(
color: colorScheme.surface,
borderRadius: const BorderRadius.vertical(top: Radius.circular(24)),
clipBehavior: Clip.antiAlias,
child: Padding(
padding: const EdgeInsets.fromLTRB(16, 12, 16, 16),
child: Obx(() {
final ntrip = NtripService.to;
final connected = ntrip.isConnected.value;
return Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Center(
child: Container(
width: 42,
height: 4,
margin: const EdgeInsets.only(bottom: 14),
decoration: BoxDecoration(
color: colorScheme.outlineVariant,
borderRadius: BorderRadius.circular(999),
),
),
),
// ── Fejléc: állapot + caster ────────────────────────
Row(
children: [
Icon(Icons.cell_tower,
color: connected ? Colors.green : Colors.grey),
const SizedBox(width: 8),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
connected
? 'NTRIP kapcsolódva'
: 'NTRIP nincs kapcsolat',
style: Theme.of(context).textTheme.titleMedium,
),
Text(
ntrip.hasCompleteSettings
? '${ntrip.host.value} · ${ntrip.mountpoint.value}'
: 'Nincs beállítva',
style: TextStyle(
fontSize: 12, color: Colors.grey.shade600),
),
],
),
),
if (connected && ntrip.connectedSince.value != null)
Text(
_formatDuration(DateTime.now()
.difference(ntrip.connectedSince.value!)),
style: TextStyle(
fontSize: 12, color: Colors.grey.shade600),
),
],
),
if (ntrip.lastError.value.isNotEmpty && !connected) ...[
const SizedBox(height: 8),
_ErrorBanner(text: ntrip.lastError.value),
],
const SizedBox(height: 14),
// ── Korrekció kora — a fő egészség-jelző ───────────
_CorrectionAgeTile(
connected: connected,
lastRtcmAt: ntrip.lastRtcmAt.value,
),
const SizedBox(height: 10),
// ── Metrikák rácsban ───────────────────────────────
Row(
children: [
Expanded(
child: _MetricTile(
label: 'Fogadott adat',
value: _formatBytes(ntrip.receivedBytes.value),
sub: '${ntrip.packetCount.value} csomag',
),
),
const SizedBox(width: 8),
Expanded(
child: _MetricTile(
label: 'GGA küldve',
value: '${ntrip.ggaSentCount.value} db',
sub: ntrip.ggaLastSentTime.value.isEmpty
? 'még nem'
: 'utolsó: ${ntrip.ggaLastSentTime.value} UTC',
warn: connected && ntrip.ggaSentCount.value == 0,
),
),
],
),
const SizedBox(height: 10),
// ── Eredmény: a GNSS oldal ─────────────────────────
_FixResultTile(),
const SizedBox(height: 16),
// ── Gombok ─────────────────────────────────────────
Row(
children: [
Expanded(
child: OutlinedButton.icon(
icon: const Icon(Icons.settings, size: 18),
label: const Text('Beállítások'),
onPressed: () {
Get.back();
NtripSettingsSheet.show();
},
),
),
const SizedBox(width: 12),
Expanded(
child: FilledButton.icon(
icon: _busy
? const SizedBox(
width: 18,
height: 18,
child:
CircularProgressIndicator(strokeWidth: 2),
)
: Icon(connected ? Icons.link_off : Icons.link,
size: 18),
label: Text(connected ? 'Bontás' : 'Kapcsolódás'),
style: connected
? FilledButton.styleFrom(
backgroundColor: colorScheme.errorContainer,
foregroundColor: colorScheme.onErrorContainer,
)
: null,
onPressed: _busy ? null : _toggleConnection,
),
),
],
),
],
);
}),
),
),
);
}
}
// ═════════════════════════════════════════════════════════════════════
// Rész-widgetek
// ═════════════════════════════════════════════════════════════════════
/// A korrekció kora, színkódolva: <2 s zöld, 2–10 s sárga, >10 s piros.
/// Ez mutatja meg azt az alattomos állapotot is, amikor a TCP-kapcsolat
/// él, de adat már nem jön (mobilnet-lyuk).
class _CorrectionAgeTile extends StatelessWidget {
final bool connected;
final DateTime? lastRtcmAt;
const _CorrectionAgeTile({required this.connected, this.lastRtcmAt});
@override
Widget build(BuildContext context) {
String text;
String label = 'Korrekció kora';
Color color;
IconData icon;
if (!connected) {
text = '—';
label = 'Korrekció';
color = Colors.grey;
icon = Icons.satellite_alt_outlined;
} else if (lastRtcmAt == null) {
text = 'várakozás az első csomagra…';
color = Colors.orange;
icon = Icons.hourglass_top;
} else {
final age = DateTime.now().difference(lastRtcmAt!);
final s = age.inSeconds;
text = s < 1 ? '<1 s' : '$s s';
if (s < 2) {
color = Colors.green;
icon = Icons.check_circle;
} else if (s <= 10) {
color = Colors.orange;
icon = Icons.warning_amber_rounded;
} else {
color = Colors.red;
icon = Icons.error;
label = 'Korrekció ELAVULT';
}
}
return Container(
padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 12),
decoration: BoxDecoration(
color: color.withOpacity(0.10),
borderRadius: BorderRadius.circular(12),
border: Border.all(color: color.withOpacity(0.4)),
),
child: Row(
children: [
Icon(icon, color: color),
const SizedBox(width: 10),
Expanded(
child: Text(label,
style: const TextStyle(fontWeight: FontWeight.w600)),
),
Text(
text,
style: TextStyle(
fontWeight: FontWeight.w700,
fontSize: 16,
color: color,
fontFeatures: const [FontFeature.tabularFigures()],
),
),
],
),
);
}
}
/// Fix-eredmény a GNSS oldalról: a kör bezárul — látszik, hogy a
/// korrekció ténylegesen "megfogant-e" (RTK fixed a cél).
class _FixResultTile extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Obx(() {
if (!Get.isRegistered<GnssService>()) return const SizedBox.shrink();
final gnss = GnssService.to;
final receiverConnected =
gnss.connectionState.value == GnssConnectionState.connected;
final type = gnss.activeConnectionType.value;
if (!receiverConnected) {
return const _MetricTile(
label: 'GNSS vevő',
value: 'Nincs csatlakoztatva',
sub: 'A korrekcióhoz külső vevő kell',
warn: true,
);
}
if (type == GnssConnectionType.phoneGps) {
return const _MetricTile(
label: 'GNSS forrás',
value: 'Telefon GPS',
sub: 'RTK korrekció fogadására nem képes',
warn: true,
);
}
final quality = gnss.gpsQuality.value;
final (label, color, icon) = switch (quality) {
4 => ('RTK FIXED', Colors.green, Icons.verified),
5 => ('RTK FLOAT', Colors.orange, Icons.adjust),
2 => ('DGPS', Colors.blue, Icons.gps_fixed),
1 => ('GPS (önálló)', Colors.grey, Icons.gps_not_fixed),
0 => ('Nincs fix', Colors.red, Icons.gps_off),
_ => ('Fix: $quality', Colors.grey, Icons.gps_fixed),
};
final hErr = math.sqrt(math.pow(gnss.latitudeError.value, 2) +
math.pow(gnss.longitudeError.value, 2));
final errText = hErr > 0
? '±${hErr < 1 ? '${(hErr * 100).toStringAsFixed(0)} cm' : '${hErr.toStringAsFixed(2)} m'} vízszintes'
: 'HDOP: ${gnss.hdop.value.toStringAsFixed(1)}';
return Container(
padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 12),
decoration: BoxDecoration(
color: color.withOpacity(0.10),
borderRadius: BorderRadius.circular(12),
border: Border.all(color: color.withOpacity(0.4)),
),
child: Row(
children: [
Icon(icon, color: color),
const SizedBox(width: 10),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(label,
style:
TextStyle(fontWeight: FontWeight.w700, color: color)),
Text(
'$errText · ${gnss.gsaUsedSatelliteCount.value} műhold',
style: TextStyle(fontSize: 12, color: Colors.grey.shade700),
),
],
),
),
],
),
);
});
}
}
class _MetricTile extends StatelessWidget {
final String label;
final String value;
final String sub;
final bool warn;
const _MetricTile({
required this.label,
required this.value,
required this.sub,
this.warn = false,
});
@override
Widget build(BuildContext context) {
final color = warn ? Colors.orange : Colors.grey;
return Container(
padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
decoration: BoxDecoration(
color: Theme.of(context).colorScheme.surfaceContainerHighest,
borderRadius: BorderRadius.circular(12),
border: warn ? Border.all(color: Colors.orange.withOpacity(0.5)) : null,
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(label,
style: TextStyle(fontSize: 11, color: Colors.grey.shade600)),
const SizedBox(height: 2),
Text(value,
style: TextStyle(
fontWeight: FontWeight.w700,
color: warn ? Colors.orange.shade800 : null,
fontFeatures: const [FontFeature.tabularFigures()],
)),
Text(sub,
style: TextStyle(fontSize: 11, color: color.withOpacity(0.9))),
],
),
);
}
}
class _ErrorBanner extends StatelessWidget {
final String text;
const _ErrorBanner({required this.text});
@override
Widget build(BuildContext context) {
return Container(
padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
decoration: BoxDecoration(
color: Colors.red.withOpacity(0.08),
borderRadius: BorderRadius.circular(10),
),
child: Row(
children: [
const Icon(Icons.error_outline, size: 16, color: Colors.red),
const SizedBox(width: 8),
Expanded(
child: Text(text,
style: const TextStyle(fontSize: 12, color: Colors.red)),
),
],
),
);
}
}
String _formatDuration(Duration d) {
final h = d.inHours;
final m = d.inMinutes % 60;
final s = d.inSeconds % 60;
if (h > 0) return '$h ó $m p';
if (m > 0) return '$m:${s.toString().padLeft(2, '0')}';
return '$s s';
}
String _formatBytes(int bytes) {
if (bytes < 1024) return '$bytes B';
if (bytes < 1024 * 1024) return '${(bytes / 1024).toStringAsFixed(1)} KB';
return '${(bytes / 1024 / 1024).toStringAsFixed(2)} MB';
}