basic csv loader, transaction list & half done stats page
This commit is contained in:
207
lib/domains/charts/chart_bloc.dart
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207
lib/domains/charts/chart_bloc.dart
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import 'package:equatable/equatable.dart';
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import 'package:fl_chart/fl_chart.dart';
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import 'package:flutter_bloc/flutter_bloc.dart';
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import 'package:tunas/domains/account/models/transaction_line.dart';
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import 'package:tunas/domains/charts/models/chart_item.dart';
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import 'package:tunas/repositories/account/account_repository.dart';
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import 'package:tunas/repositories/account/models/transaction.dart';
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part 'chart_event.dart';
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part 'chart_state.dart';
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class ChartBloc extends Bloc<ChartEvent, ChartState> {
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final AccountRepository _accountRepository;
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ChartBloc({required AccountRepository accountRepository}) :
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_accountRepository = accountRepository, super(const ChartState()) {
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on<ChartAccountLoad>(_onAccountLoad);
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on<ChartNextYear>(_onNextYear);
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on<ChartPreviousYear>(_onPreviousYear);
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_accountRepository
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.getTransactionsStream()
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.listen((transactions) => add(ChartAccountLoad(transactions)));
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}
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_onAccountLoad(ChartAccountLoad event, Emitter<ChartState> emit) {
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ChartState localState = state.copyWith(transactions: event.transactions);
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emit(_computeStateStats(localState));
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}
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_onNextYear(ChartNextYear event, Emitter<ChartState> emit) {
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ChartState localState = state.copyWith(currentYear: state.currentYear + 1);
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emit(_computeStateScopedStats(localState));
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}
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_onPreviousYear(ChartPreviousYear event, Emitter<ChartState> emit) {
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ChartState localState = state.copyWith(currentYear: state.currentYear - 1);
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emit(_computeStateScopedStats(localState));
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}
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ChartState _computeStateStats(ChartState state) {
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double globalTotal = 0;
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Map<String, double> accountsTotals = <String, double>{};
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List<TransactionLine> transactionsLines = [];
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Map<String, double> categoriesTotals = {};
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List<FlSpot> monthlyTotals = [];
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Map<String, Map<String, double>> categoriesMonthlyTotals = {};
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DateTime firstDate = DateTime.now();
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DateTime lastDate = DateTime.fromMicrosecondsSinceEpoch(0);
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for(var transaction in state.transactions) {
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double subTotal = globalTotal + transaction.value;
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globalTotal = subTotal;
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double accountTotal = accountsTotals[transaction.account] ?? 0;
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accountTotal += transaction.value;
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accountsTotals[transaction.account] = accountTotal;
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TransactionLine transactionLine = TransactionLine(transaction: transaction, subTotal: subTotal);
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transactionsLines.add(transactionLine);
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monthlyTotals.add(FlSpot(transactionLine.transaction.date.microsecondsSinceEpoch.toDouble(), transactionLine.subTotal));
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if (firstDate.compareTo(transaction.date) < 0) {
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firstDate = transaction.date;
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}
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if (lastDate.compareTo(transaction.date) > 0) {
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lastDate = transaction.date;
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}
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double categoryTotal = categoriesTotals[transaction.category] ?? 0;
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categoryTotal += transaction.value;
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categoriesTotals[transaction.category] = categoryTotal;
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}
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return _computeStateScopedStats(state.copyWith(
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transactionsLines: transactionsLines,
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globalTotal: globalTotal,
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accountsTotals: accountsTotals,
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categoriesTotals: categoriesTotals,
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monthlyTotals: monthlyTotals,
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categoriesMonthlyTotals: categoriesMonthlyTotals,
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firstDate: firstDate,
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lastDate: lastDate,
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currentYear: DateTime.now().year,
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));
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}
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ChartState _computeStateScopedStats(ChartState state) {
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double globalTotal = 0;
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List<ChartItem> scopedCategoriesPositiveTotals = [];
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List<ChartItem> scopedCategoriesNegativeTotals = [];
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Map<int, FlSpot> scopedMonthlyTotals = {};
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Map<String, Map<String, double>> scopedCategoriesMonthlyTotals = {};
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for(var transaction in state.transactions) {
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double subTotal = globalTotal + transaction.value;
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globalTotal = subTotal;
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if (transaction.date.year != state.currentYear) {
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continue;
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}
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if (state.accountsTotals.containsKey(transaction.category)) {
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continue;
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}
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TransactionLine transactionLine = TransactionLine(transaction: transaction, subTotal: subTotal);
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DateTime transactionDate = transactionLine.transaction.date;
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int transactionDateDay = transactionDate.difference(DateTime(transactionDate.year,1,1)).inDays + 1;
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scopedMonthlyTotals[transactionDateDay] = FlSpot(transactionDateDay.toDouble(), transactionLine.subTotal);
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if (transaction.category.isEmpty) {
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continue;
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}
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if (transaction.value >= 0) {
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ChartItem? chartItem = scopedCategoriesPositiveTotals.firstWhere(
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(item) => item.label == transaction.category,
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orElse: () {
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ChartItem newChartItem = ChartItem(label: transaction.category, value: 0);
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scopedCategoriesPositiveTotals.add(newChartItem);
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return newChartItem;
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}
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);
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chartItem.value += transaction.value;
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}
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if (transaction.value < 0) {
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ChartItem? chartItem = scopedCategoriesNegativeTotals.firstWhere(
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(item) => item.label == transaction.category,
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orElse: () {
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ChartItem newChartItem = ChartItem(label: transaction.category, value: 0);
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scopedCategoriesNegativeTotals.add(newChartItem);
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return newChartItem;
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}
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);
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chartItem.value += transaction.value;
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}
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}
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List<ChartItem> scopedCategoriesPositiveTotalsPercents = [];
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List<ChartItem> scopedCategoriesNegativeTotalsPercents = [];
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List<ChartItem> scopedSimplifiedCategoriesPositiveTotalsPercents = [];
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List<ChartItem> scopedSimplifiedCategoriesNegativeTotalsPercents = [];
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if (scopedCategoriesPositiveTotals.isNotEmpty) {
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double catergoriesTotal = scopedCategoriesPositiveTotals.map((item) => item.value).reduce((value, element) => value + element);
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scopedCategoriesPositiveTotalsPercents = scopedCategoriesPositiveTotals.map((item) => ChartItem(label: item.label, value: item.value / catergoriesTotal * 100)).toList();
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double otherPercentTotal = 0;
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for (var item in scopedCategoriesPositiveTotalsPercents) {
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if (item.value > 1) {
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scopedSimplifiedCategoriesPositiveTotalsPercents.add(ChartItem(label: item.label, value: item.value));
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} else {
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otherPercentTotal += item.value;
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}
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}
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scopedSimplifiedCategoriesPositiveTotalsPercents.add(ChartItem(label: 'Autre', value: otherPercentTotal));
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}
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if (scopedCategoriesNegativeTotals.isNotEmpty) {
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double catergoriesTotal = scopedCategoriesNegativeTotals.map((item) => item.value).reduce((value, element) => value + element);
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scopedCategoriesNegativeTotalsPercents = scopedCategoriesNegativeTotals.map((item) => ChartItem(label: item.label, value: item.value / catergoriesTotal * 100)).toList();
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double otherPercentTotal = 0;
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for (var item in scopedCategoriesNegativeTotalsPercents) {
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if (item.value > 1) {
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scopedSimplifiedCategoriesNegativeTotalsPercents.add(ChartItem(label: item.label, value: item.value));
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} else {
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otherPercentTotal += item.value;
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}
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}
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scopedSimplifiedCategoriesNegativeTotalsPercents.add(ChartItem(label: 'Autre', value: otherPercentTotal));
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}
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List<ChartItem> scopedSimplifiedCategoriesPositiveTotals = [];
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List<ChartItem> scopedSimplifiedCategoriesNegativeTotals = [];
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scopedCategoriesPositiveTotals.sort((a, b) => a.value.compareTo(b.value));
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scopedCategoriesPositiveTotalsPercents.sort((a, b) => a.value.compareTo(b.value));
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scopedCategoriesNegativeTotals.sort((a, b) => a.value.compareTo(b.value));
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scopedCategoriesNegativeTotalsPercents.sort((a, b) => a.value.compareTo(b.value));
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scopedSimplifiedCategoriesPositiveTotals.sort((a, b) => a.value.compareTo(b.value));
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scopedSimplifiedCategoriesPositiveTotalsPercents.sort((a, b) => a.value.compareTo(b.value));
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scopedSimplifiedCategoriesNegativeTotals.sort((a, b) => a.value.compareTo(b.value));
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scopedSimplifiedCategoriesNegativeTotalsPercents.sort((a, b) => a.value.compareTo(b.value));
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return state.copyWith(
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scopedCategoriesPositiveTotals: scopedCategoriesPositiveTotals,
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scopedCategoriesPositiveTotalsPercents: scopedCategoriesPositiveTotalsPercents,
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scopedCategoriesNegativeTotals: scopedCategoriesNegativeTotals,
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scopedCategoriesNegativeTotalsPercents: scopedCategoriesNegativeTotalsPercents,
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scopedSimplifiedCategoriesPositiveTotals: scopedSimplifiedCategoriesPositiveTotals,
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scopedSimplifiedCategoriesPositiveTotalsPercents: scopedSimplifiedCategoriesPositiveTotalsPercents,
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scopedSimplifiedCategoriesNegativeTotals: scopedSimplifiedCategoriesNegativeTotals,
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scopedSimplifiedCategoriesNegativeTotalsPercents: scopedSimplifiedCategoriesNegativeTotalsPercents,
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scopedMonthlyTotals: scopedMonthlyTotals.values.toList(),
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scopedCategoriesMonthlyTotals: scopedCategoriesMonthlyTotals,
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);
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}
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}
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