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import 'dart:async';
import 'package:bloc/bloc.dart';
import 'package:equatable/equatable.dart';
import 'package:monitoring_repository/monitoring_repository.dart';
part 'atmospheric_conditions_event.dart';
part 'atmospheric_conditions_state.dart';
class AtmosphericConditionsBloc extends Bloc<AtmosphericConditionsEvent, AtmosphericConditionsState> {
final MonitoringRepository _repository;
StreamSubscription<AtmosphericConditions>? _subscription;
static const int _maxHistoryItems = 1500;
AtmosphericConditionsBloc({required MonitoringRepository repository})
: _repository = repository,
super(const AtmosphericConditionsState()) {
on<WatchAtmosphericConditionsStarted>(_onStarted);
on<_AtmosphericConditionsUpdated>(_onUpdated);
}
/// 🚀 START
Future<void> _onStarted(
WatchAtmosphericConditionsStarted event,
Emitter<AtmosphericConditionsState> emit,
) async {
emit(state.copyWith(isLoading: true));
await _subscription?.cancel();
// Preload today's history from Firebase history table.
final now = DateTime.now();
final historyFromFirebase = await _repository.getSensorHistory(
'/sensor/history',
(json) => AtmosphericConditions.fromJson(json),
);
final todayHistory = historyFromFirebase.where((item) => _isSameDay(item.timestamp, now)).toList()..sort((a, b) => a.timestamp.compareTo(b.timestamp));
final trimmedHistory = todayHistory.length > _maxHistoryItems ? todayHistory.sublist(todayHistory.length - _maxHistoryItems) : todayHistory;
final latestFromHistory = trimmedHistory.isNotEmpty ? trimmedHistory.last : null;
emit(state.copyWith(
temperature: latestFromHistory?.temperature ?? state.temperature,
humidity: latestFromHistory?.humidity ?? state.humidity,
pressure: latestFromHistory?.pressure ?? state.pressure,
altitude: latestFromHistory?.altitude ?? state.altitude,
timeMs: latestFromHistory?.timeMs ?? state.timeMs,
history: trimmedHistory,
isLoading: false,
));
_subscription = _repository
.getSensorStream(
'/sensor/latest',
(json) => AtmosphericConditions.fromJson(json),
)
.listen((data) {
add(_AtmosphericConditionsUpdated(data));
});
}
/// REALTIME UPDATE
void _onUpdated(
_AtmosphericConditionsUpdated event,
Emitter<AtmosphericConditionsState> emit,
) {
final now = DateTime.now();
final updatedHistory = state.history.where((item) => _isSameDay(item.timestamp, now)).toList();
final shouldAppend = updatedHistory.isEmpty || updatedHistory.last.timeMs != event.data.timeMs || updatedHistory.last.pressure != event.data.pressure || updatedHistory.last.timestamp != event.data.timestamp;
if (shouldAppend) {
updatedHistory.add(event.data);
if (updatedHistory.length > _maxHistoryItems) {
updatedHistory.removeAt(0);
}
}
emit(state.copyWith(
temperature: event.data.temperature,
humidity: event.data.humidity,
pressure: event.data.pressure,
altitude: event.data.altitude,
timeMs: event.data.timeMs,
history: updatedHistory,
isLoading: false,
));
}
bool _isSameDay(DateTime a, DateTime b) {
return a.year == b.year && a.month == b.month && a.day == b.day;
}
@override
Future<void> close() async {
await _subscription?.cancel();
return super.close();
}
}
/// INTERNAL EVENT
class _AtmosphericConditionsUpdated extends AtmosphericConditionsEvent {
final AtmosphericConditions data;
const _AtmosphericConditionsUpdated(this.data);
@override
List<Object> get props => [
data
];
}

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part of 'atmospheric_conditions_bloc.dart';
abstract class AtmosphericConditionsEvent extends Equatable {
const AtmosphericConditionsEvent();
@override
List<Object> get props => [];
}
class WatchAtmosphericConditionsStarted extends AtmosphericConditionsEvent {}

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part of 'atmospheric_conditions_bloc.dart';
class AtmosphericConditionsState extends Equatable {
final double temperature;
final double humidity;
final double pressure;
final double altitude;
final int timeMs;
final List<AtmosphericConditions> history;
final bool isLoading;
const AtmosphericConditionsState({
this.temperature = 0.0,
this.humidity = 0.0,
this.pressure = 0.0,
this.altitude = 0.0,
this.timeMs = 0,
this.history = const [],
this.isLoading = true,
});
AtmosphericConditionsState copyWith({
double? temperature,
double? humidity,
double? pressure,
double? altitude,
int? timeMs,
List<AtmosphericConditions>? history,
bool? isLoading,
}) {
return AtmosphericConditionsState(
temperature: temperature ?? this.temperature,
humidity: humidity ?? this.humidity,
pressure: pressure ?? this.pressure,
altitude: altitude ?? this.altitude,
timeMs: timeMs ?? this.timeMs,
history: history ?? this.history,
isLoading: isLoading ?? this.isLoading,
);
}
@override
List<Object> get props => [
temperature,
humidity,
pressure,
altitude,
timeMs,
history,
isLoading,
];
}

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import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:fl_chart/fl_chart.dart';
import 'package:monitoring_repository/monitoring_repository.dart';
import '../blocs/atmospheric_conditions_bloc.dart';
import '../../shared/utils/excel/excel_export_service.dart';
import '../../shared/widgets/export_excel_button.dart';
String formatUptimeShort(int timeMs) {
final duration = Duration(milliseconds: timeMs);
final minutes = duration.inMinutes.remainder(60).toString().padLeft(2, '0');
final seconds = duration.inSeconds.remainder(60).toString().padLeft(2, '0');
return "$minutes:$seconds";
}
String formatUptimeLong(int timeMs) {
final duration = Duration(milliseconds: timeMs);
final hours = duration.inHours.toString().padLeft(2, '0');
final minutes = duration.inMinutes.remainder(60).toString().padLeft(2, '0');
final seconds = duration.inSeconds.remainder(60).toString().padLeft(2, '0');
return "$hours:$minutes:$seconds";
}
String formatClockTime(DateTime timestamp) {
final h = timestamp.hour.toString().padLeft(2, '0');
final m = timestamp.minute.toString().padLeft(2, '0');
final s = timestamp.second.toString().padLeft(2, '0');
return "$h:$m:$s";
}
class AtmosphericScreen extends StatelessWidget {
const AtmosphericScreen({super.key});
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.grey.shade100,
appBar: AppBar(
title: const Text(
"Kondisi Atmosfer",
style: TextStyle(fontWeight: FontWeight.bold),
),
centerTitle: true,
backgroundColor: Colors.transparent,
elevation: 0,
foregroundColor: Colors.black,
),
body: BlocBuilder<AtmosphericConditionsBloc, AtmosphericConditionsState>(
builder: (context, state) {
if (state.isLoading) {
return const Center(child: CircularProgressIndicator());
}
return SingleChildScrollView(
padding: const EdgeInsets.all(20),
child: Column(
children: [
_mainPressure(state),
const SizedBox(height: 24),
_historyChart(state),
const SizedBox(height: 24),
_HistoryTableCard(history: state.history),
const SizedBox(height: 24),
ExportExcelButton(
onExport: () {
final historyData = state.history
.map((e) => {
'timeMs': e.timeMs,
'pressure': e.pressure,
'timestamp': e.timestamp,
})
.toList();
return ExcelExportService.atmospheric(
pressure: state.pressure,
timeMs: state.timeMs,
timestamp: state.history.isNotEmpty ? state.history.last.timestamp : DateTime.now(),
historyData: historyData,
);
},
label: 'Export Excel Hari Ini',
),
],
),
);
},
),
);
}
/// =========================
/// 🔵 PRESSURE (HERO CARD)
/// =========================
Widget _mainPressure(AtmosphericConditionsState state) {
return Container(
width: double.infinity,
padding: const EdgeInsets.symmetric(vertical: 40),
decoration: BoxDecoration(
gradient: LinearGradient(
colors: [
const Color.fromARGB(255, 38, 255, 222),
const Color.fromARGB(255, 53, 132, 229)
],
),
borderRadius: BorderRadius.circular(25),
boxShadow: [
BoxShadow(
color: const Color.fromARGB(255, 0, 191, 255).withOpacity(0.3),
blurRadius: 20,
offset: const Offset(0, 10),
)
],
),
child: Column(
children: [
const Icon(Icons.speed, color: Colors.white, size: 50),
const SizedBox(height: 10),
Text(
state.pressure.toStringAsFixed(1),
style: const TextStyle(
fontSize: 70,
fontWeight: FontWeight.bold,
color: Colors.white,
),
),
const Text(
"hPa",
style: TextStyle(color: Colors.white70, fontSize: 18),
),
],
),
);
}
Widget _historyChart(AtmosphericConditionsState state) {
final history = state.history;
if (history.isEmpty) {
return _emptyCard("Grafik histori tekanan hari ini belum ada data");
}
final points = <FlSpot>[];
double minY = history.first.pressure;
double maxY = history.first.pressure;
for (int i = 0; i < history.length; i++) {
final pressure = history[i].pressure;
points.add(FlSpot(i.toDouble(), pressure));
if (pressure < minY) {
minY = pressure;
}
if (pressure > maxY) {
maxY = pressure;
}
}
final range = (maxY - minY).abs();
final padding = range < 1 ? 0.5 : range * 0.15;
return Container(
width: double.infinity,
padding: const EdgeInsets.all(16),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(20),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
"Grafik Histori Tekanan Hari Ini",
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
const SizedBox(height: 12),
SizedBox(
height: 220,
child: LineChart(
LineChartData(
minX: 0,
maxX: (history.length - 1).toDouble(),
minY: minY - padding,
maxY: maxY + padding,
gridData: FlGridData(show: true),
borderData: FlBorderData(show: false),
titlesData: FlTitlesData(
topTitles: AxisTitles(
sideTitles: SideTitles(showTitles: false),
),
rightTitles: AxisTitles(
sideTitles: SideTitles(showTitles: false),
),
leftTitles: AxisTitles(
sideTitles: SideTitles(
showTitles: true,
reservedSize: 44,
interval: range < 1 ? 0.5 : null,
getTitlesWidget: (value, meta) => Text(
value.toStringAsFixed(1),
style: const TextStyle(fontSize: 10),
),
),
),
bottomTitles: AxisTitles(
sideTitles: SideTitles(
showTitles: true,
interval: history.length > 6 ? (history.length / 5).ceilToDouble() : 1,
getTitlesWidget: (value, meta) {
final index = value.toInt();
if (index < 0 || index >= history.length) {
return const SizedBox.shrink();
}
return Padding(
padding: const EdgeInsets.only(top: 6),
child: Text(
formatClockTime(history[index].timestamp),
style: const TextStyle(fontSize: 10),
),
);
},
),
),
),
lineBarsData: [
LineChartBarData(
spots: points,
isCurved: true,
color: Colors.blue,
barWidth: 3,
dotData: FlDotData(show: history.length <= 10),
belowBarData: BarAreaData(
show: true,
color: Colors.blue.withOpacity(0.15),
),
),
],
),
),
),
],
),
);
}
Widget _emptyCard(String text) {
return Container(
width: double.infinity,
padding: const EdgeInsets.all(20),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(20),
),
child: Text(
text,
style: const TextStyle(color: Colors.grey),
),
);
}
}
class _HistoryTableCard extends StatefulWidget {
final List<AtmosphericConditions> history;
const _HistoryTableCard({required this.history});
@override
State<_HistoryTableCard> createState() => _HistoryTableCardState();
}
class _HistoryTableCardState extends State<_HistoryTableCard> {
static const int _rowsPerPage = 10;
int _currentPage = 0;
@override
void didUpdateWidget(covariant _HistoryTableCard oldWidget) {
super.didUpdateWidget(oldWidget);
final totalPages = _totalPages;
if (totalPages > 0 && _currentPage >= totalPages) {
_currentPage = totalPages - 1;
}
}
int get _totalPages {
if (widget.history.isEmpty) {
return 0;
}
return (widget.history.length / _rowsPerPage).ceil();
}
List<AtmosphericConditions> get _pageItems {
final reversedHistory = widget.history.reversed.toList();
final start = _currentPage * _rowsPerPage;
final end = (start + _rowsPerPage).clamp(0, reversedHistory.length);
return reversedHistory.sublist(start, end);
}
void _goToPreviousPage() {
if (_currentPage > 0) {
setState(() => _currentPage--);
}
}
void _goToNextPage() {
if (_currentPage < _totalPages - 1) {
setState(() => _currentPage++);
}
}
@override
Widget build(BuildContext context) {
if (widget.history.isEmpty) {
return Container(
width: double.infinity,
padding: const EdgeInsets.all(20),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(20),
),
child: const Text(
"Tabel histori tekanan hari ini belum ada data",
style: TextStyle(color: Colors.grey),
),
);
}
final pageItems = _pageItems;
final hasMultiplePages = _totalPages > 1;
return Container(
width: double.infinity,
padding: const EdgeInsets.all(16),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(20),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
"Tabel Histori Tekanan Hari Ini",
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
const SizedBox(height: 4),
Text(
"Halaman ${_currentPage + 1} dari $_totalPages · ${widget.history.length} data",
style: const TextStyle(color: Colors.grey, fontSize: 12),
),
const SizedBox(height: 12),
SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: DataTable(
columns: const [
DataColumn(label: Text("No")),
DataColumn(label: Text("Waktu")),
DataColumn(label: Text("Tekanan")),
],
rows: List<DataRow>.generate(pageItems.length, (index) {
final item = pageItems[index];
final absoluteIndex = (_currentPage * _rowsPerPage) + index + 1;
return DataRow(
cells: [
DataCell(Text(absoluteIndex.toString())),
DataCell(Text(formatClockTime(item.timestamp))),
DataCell(Text("${item.pressure.toStringAsFixed(1)} hPa")),
],
);
}),
),
),
if (hasMultiplePages) ...[
const SizedBox(height: 12),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
TextButton.icon(
onPressed: _currentPage == 0 ? null : _goToPreviousPage,
icon: const Icon(Icons.chevron_left),
label: const Text('Sebelumnya'),
),
TextButton.icon(
onPressed: _currentPage >= _totalPages - 1 ? null : _goToNextPage,
icon: const Icon(Icons.chevron_right),
label: const Text('Berikutnya'),
),
],
),
],
],
),
);
}
}