Allow exporting current view to CSV

analysis_options.yaml

@@ -101,7 +101,7 @@ linter:
     - avoid_unnecessary_containers
     - avoid_unused_constructor_parameters
     - avoid_void_async
-    - avoid_web_libraries_in_flutter
+    # - avoid_web_libraries_in_flutter
     - await_only_futures
     - camel_case_extensions
     - camel_case_types

lib/bloc/cubits/data_cubit.dart

@@ -1,24 +1,24 @@
-import 'package:fl_chart/fl_chart.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:powasys_frontend/bloc/repos/data_repo.dart';
 import 'package:powasys_frontend/bloc/states.dart';
+import 'package:powasys_frontend/data/fl_spot.dart';
 import 'package:powasys_frontend/data/trend.dart';
 import 'package:powasys_frontend/util/hex_color.dart';
 import 'package:tuple/tuple.dart';
 
 class DataCubit extends Cubit<DataState> {
   final DataRepo _dataRepo;
 
-  DataCubit(this._dataRepo) : super(const DataState(PowaSysState.notFetched));
+  DataCubit(this._dataRepo) : super(const DataState(DataFetchState.notFetched));
 
   Future<void> fetchData({
     required List<int> disabledPowadors,
     required Trend currentTrend,
     required int minDiv,
   }) async {
     try {
-      emit(state.copyWith(state: PowaSysState.fetching));
+      emit(state.copyWith(state: DataFetchState.fetching));
 
       final powadors = <int, Tuple2<String, Color>>{};
       for (final entry in await _dataRepo.getPowas()) {
@@ -45,47 +45,58 @@ class DataCubit extends Cubit<DataState> {
 
       final averages = <int, Map<Trend, double>>{};
       for (final entry in parsed24h['averages']) {
-        averages[int.parse(entry['powadorId'].toString())] =
-            Trend.values.asMap().map(
-                  (id, trend) =>
-                      MapEntry(trend, double.parse(entry[trend.id].toString())),
-                );
+        averages[int.parse(entry['powadorId'].toString())] = Trend.values
+            .where((t) => t != Trend.state)
+            .toList(growable: false)
+            .asMap()
+            .map(
+              (id, trend) =>
+                  MapEntry(trend, double.parse(entry[trend.id].toString())),
+            );
       }
 
       final max = <int, Map<Trend, double>>{};
       for (final entry in parsed24h['max']) {
-        max[int.parse(entry['powadorId'].toString())] =
-            Trend.values.asMap().map(
-                  (id, trend) =>
-                      MapEntry(trend, double.parse(entry[trend.id].toString())),
-                );
+        max[int.parse(entry['powadorId'].toString())] = Trend.values
+            .where((t) => t != Trend.state)
+            .toList(growable: false)
+            .asMap()
+            .map(
+              (id, trend) =>
+                  MapEntry(trend, double.parse(entry[trend.id].toString())),
+            );
       }
 
       var minVal = 0.0;
       var maxVal = 0.0;
-      final data = Map<int, List<FlSpot>>.fromEntries(
+      final data = Map<int, List<PowaSpot>>.fromEntries(
         powadors.keys.map((e) => MapEntry(e, [])),
       );
       for (final entry in parsed24h['data']) {
         final powaId = int.parse(entry['powadorId'].toString());
         if (!disabledPowadors.contains(powaId)) {
-          final value = double.parse(entry[currentTrend.id].toString());
+          final values = {
+            for (var t in Trend.values)
+              t: entry[t.id] == null
+                  ? null
+                  : double.parse(entry[t.id].toString())
+          };
+          final value = values[currentTrend]!;
           minVal = value < minVal ? value : minVal;
           maxVal = value > maxVal ? value : maxVal;
           data[powaId]!.add(
-            FlSpot(
-              DateTime.parse(entry['time'].toString())
-                  .millisecondsSinceEpoch
-                  .toDouble(),
+            PowaSpot.fromDateTime(
+              DateTime.parse(entry['time'].toString()),
               value,
+              values,
             ),
           );
         }
       }
 
       emit(
         state.copyWith(
-          state: PowaSysState.fetchedData,
+          state: DataFetchState.fetchedData,
           powadors: powadors,
           minVal: minVal,
           maxVal: maxVal,
@@ -96,7 +107,7 @@ class DataCubit extends Cubit<DataState> {
         ),
       );
     } catch (e) {
-      emit(state.copyWith(state: PowaSysState.fetchError));
+      emit(state.copyWith(state: DataFetchState.fetchError, ex: e));
     }
   }
 }

lib/bloc/cubits/export_cubit.dart

@@ -0,0 +1,52 @@
+// ignore_for_file: missing_whitespace_between_adjacent_strings
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:powasys_frontend/bloc/states.dart';
+import 'package:powasys_frontend/constants.dart';
+import 'package:powasys_frontend/data/fl_spot.dart';
+import 'package:powasys_frontend/data/trend.dart';
+import 'package:tuple/tuple.dart';
+
+class ExportCubit extends Cubit<ExportState> {
+  ExportCubit() : super(const ExportState(ExportGenState.notStarted));
+
+  Future<void> exportData(Map<int, List<PowaSpot>> data) async {
+    try {
+      emit(state.copyWith(state: ExportGenState.exporting));
+
+      var toExport = 'Powador ID;Time;State;Generator Voltage;'
+          'Generator Current;Generator Power;Net Voltage;Net Current;Net Power;'
+          'Temperature\n';
+
+      final entries = data.entries
+          .expand((e) => e.value.map((f) => Tuple2(f, e.key)))
+          .toList(growable: false);
+      entries.sort((a, b) {
+        final comp = a.item1.compare(b.item1);
+        return comp != 0 ? comp : a.item2 - b.item2;
+      });
+      toExport += entries
+          .map(
+            (e) => '${e.item2};'
+                '${e.item1.time};'
+                '${e.item1.values[Trend.state] as int?};'
+                '${decimalFormatOne.format(e.item1.values[Trend.genVoltage])};'
+                '${decimalFormatTwo.format(e.item1.values[Trend.genCurrent])};'
+                '${e.item1.values[Trend.genPower] as int?};'
+                '${decimalFormatOne.format(e.item1.values[Trend.netVoltage])};'
+                '${decimalFormatTwo.format(e.item1.values[Trend.netCurrent])};'
+                '${e.item1.values[Trend.netPower] as int?};'
+                '${e.item1.values[Trend.temperature] as int?}',
+          )
+          .join('\n');
+
+      emit(
+        state.copyWith(
+          state: ExportGenState.exported,
+          toExport: toExport,
+        ),
+      );
+    } catch (e) {
+      emit(state.copyWith(state: ExportGenState.exportError, ex: e));
+    }
+  }
+}

lib/bloc/states.dart

@@ -1,25 +1,30 @@
-import 'package:fl_chart/fl_chart.dart';
 import 'package:flutter/material.dart';
+import 'package:powasys_frontend/data/fl_spot.dart';
 import 'package:powasys_frontend/data/trend.dart';
 import 'package:tuple/tuple.dart';
 
-class BlocState {
-  final PowaSysState state;
+class BlocState<State> {
+  final State state;
+  final dynamic ex;
 
-  const BlocState(this.state);
+  const BlocState(
+    this.state, {
+    this.ex,
+  });
 }
 
-class DataState extends BlocState {
+class DataState extends BlocState<DataFetchState> {
   final double minVal;
   final double maxVal;
   final Map<int, Tuple2<String, Color>> powadors;
   final Map<int, Tuple2<DateTime, Map<Trend, double>>> latest;
   final Map<int, Map<Trend, double>> averages;
   final Map<int, Map<Trend, double>> max;
-  final Map<int, List<FlSpot>> data;
+  final Map<int, List<PowaSpot>> data;
 
   const DataState(
     super.state, {
+    super.ex,
     this.minVal = 0,
     this.maxVal = 0,
     this.powadors = const {},
@@ -30,17 +35,19 @@ class DataState extends BlocState {
   });
 
   DataState copyWith({
-    PowaSysState? state,
+    DataFetchState? state,
+    dynamic ex,
     double? minVal,
     double? maxVal,
     Map<int, Tuple2<String, Color>>? powadors,
     Map<int, Tuple2<DateTime, Map<Trend, double>>>? latest,
     Map<int, Map<Trend, double>>? averages,
     Map<int, Map<Trend, double>>? max,
-    Map<int, List<FlSpot>>? data,
+    Map<int, List<PowaSpot>>? data,
   }) =>
       DataState(
-        state ?? this.state,
+        state ?? super.state,
+        ex: ex ?? super.ex,
         minVal: minVal ?? this.minVal,
         maxVal: maxVal ?? this.maxVal,
         powadors: powadors ?? this.powadors,
@@ -51,7 +58,7 @@ class DataState extends BlocState {
       );
 }
 
-enum PowaSysState {
+enum DataFetchState {
   notFetched(),
   fetching(),
   fetchedData(finished: true),
@@ -60,7 +67,43 @@ enum PowaSysState {
   final bool finished;
   final bool errored;
 
-  const PowaSysState({
+  const DataFetchState({
+    this.finished = false,
+    this.errored = false,
+  });
+}
+
+class ExportState extends BlocState<ExportGenState> {
+  final String toExport;
+
+  const ExportState(
+    super.state, {
+    super.ex,
+    this.toExport = '',
+  });
+
+  ExportState copyWith({
+    ExportGenState? state,
+    dynamic ex,
+    String? toExport,
+  }) =>
+      ExportState(
+        state ?? super.state,
+        ex: ex ?? super.ex,
+        toExport: toExport ?? this.toExport,
+      );
+}
+
+enum ExportGenState {
+  notStarted(),
+  exporting(),
+  exported(finished: true),
+  exportError(finished: true, errored: true);
+
+  final bool finished;
+  final bool errored;
+
+  const ExportGenState({
     this.finished = false,
     this.errored = false,
   });

lib/config/locale_config.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:hive/hive.dart';
+import 'package:intl/intl.dart';
 import 'package:powasys_frontend/l10n/lang_chooser.dart';
 
 const currentLocaleKey = 'locale.current';
@@ -12,6 +13,7 @@ class LocaleSettings extends ChangeNotifier {
   LocaleSettings(this._box) {
     if (_box.containsKey(currentLocaleKey)) {
       _locale = _box.get(currentLocaleKey) as String;
+      Intl.defaultLocale = _locale;
     } else {
       _box.put(currentLocaleKey, _locale);
     }
@@ -26,6 +28,7 @@ class LocaleSettings extends ChangeNotifier {
   void setLocale(String locale) {
     _locale = locale;
     _box.put(currentLocaleKey, _locale);
+    Intl.defaultLocale = _locale;
     notifyListeners();
   }
 }

lib/constants.dart

@@ -1,4 +1,5 @@
 import 'package:flutter_dotenv/flutter_dotenv.dart';
+import 'package:intl/intl.dart';
 import 'package:package_info_plus/package_info_plus.dart';
 import 'package:powasys_frontend/data/trend.dart';
 
@@ -10,6 +11,10 @@ String get apiEndpoint24h => dotenv.env['APIEndpoint24h']!;
 
 late PackageInfo packageInfo;
 
+final decimalFormatOne = NumberFormat('##0.0');
+
+final decimalFormatTwo = NumberFormat('##0.00');
+
 // Cached Settings which should be gone after reloading
 List<int> disabledPowadors = [];
 Trend currentTrend = Trend.netPower;

lib/data/fl_spot.dart

@@ -0,0 +1,18 @@
+import 'package:fl_chart/fl_chart.dart';
+import 'package:powasys_frontend/data/trend.dart';
+import 'package:powasys_frontend/util/math.dart';
+
+class PowaSpot extends FlSpot {
+  final DateTime time;
+  final Map<Trend, double?> values;
+
+  PowaSpot(super.x, super.y, this.time, this.values);
+
+  PowaSpot.fromDateTime(DateTime time, double y, Map<Trend, double?> values)
+      : this(time.millisecondsSinceEpoch.toDouble(), y, time, values);
+
+  int compare(PowaSpot other) {
+    final comp = signum(x - other.x);
+    return comp != 0 ? comp : signum(y - other.y);
+  }
+}

lib/data/trend.dart

@@ -3,6 +3,7 @@ import 'package:flutter/widgets.dart';
 import 'package:powasys_frontend/generated/l10n.dart';
 
 enum Trend {
+  state(id: 'state'),
   genVoltage(id: 'genVoltage'),
   genCurrent(id: 'genCurrent'),
   genPower(id: 'genPower'),
@@ -17,6 +18,8 @@ enum Trend {
 
   String name(BuildContext context) {
     switch (this) {
+      case Trend.state:
+        return 'State'; // TODO(Nico): I18n!
       case Trend.genVoltage:
         return S.of(context).genVoltage;
       case Trend.genCurrent:
@@ -36,6 +39,8 @@ enum Trend {
 
   String unit(BuildContext context) {
     switch (this) {
+      case Trend.state:
+        return '';
       case Trend.genVoltage:
         return S.of(context).voltage_unit;
       case Trend.genCurrent:

lib/main.dart

@@ -4,6 +4,7 @@ import 'package:flutter_dotenv/flutter_dotenv.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:package_info_plus/package_info_plus.dart';
 import 'package:powasys_frontend/bloc/cubits/data_cubit.dart';
+import 'package:powasys_frontend/bloc/cubits/export_cubit.dart';
 import 'package:powasys_frontend/bloc/repos/data_repo.dart';
 import 'package:powasys_frontend/config/config.dart';
 import 'package:powasys_frontend/constants.dart';
@@ -49,6 +50,9 @@ class _PowaSysFrontendWidgetState extends State<PowaSysFrontendWidget> {
             BlocProvider<DataCubit>(
               create: (context) => DataCubit(context.read<DataRepo>()),
             ),
+            BlocProvider<ExportCubit>(
+              create: (context) => ExportCubit(),
+            ),
           ],
           child: MaterialApp(
             onGenerateTitle: (context) => S.of(context).app_name,