673 lines
21 KiB
Dart
673 lines
21 KiB
Dart
/// Look ahead: projected balance from recurring templates through a date.
|
|
library;
|
|
|
|
import 'package:flutter/material.dart';
|
|
import 'package:provider/provider.dart';
|
|
|
|
import '../models/bank.dart';
|
|
import '../models/transaction_meta.dart';
|
|
import '../providers/bank_provider.dart';
|
|
import '../providers/preferences_provider.dart';
|
|
import '../providers/tx_meta_provider.dart';
|
|
import '../screens/transaction_detail_screen.dart';
|
|
import '../utils/app_theme.dart';
|
|
import '../utils/helpers.dart';
|
|
import '../utils/look_ahead.dart';
|
|
import '../utils/navigation.dart';
|
|
import '../utils/tx_calendar.dart';
|
|
import '../widgets/empty_state.dart';
|
|
import '../widgets/recurring_template_sheet.dart';
|
|
import '../widgets/responsive_body.dart';
|
|
import '../widgets/shell_tab_scope.dart';
|
|
import '../widgets/skip_build_when_covered.dart';
|
|
|
|
enum _PeriodMode { monthly, yearly }
|
|
|
|
class LookAheadScreen extends StatefulWidget {
|
|
const LookAheadScreen({super.key});
|
|
|
|
static const tabIndex = 2;
|
|
|
|
@override
|
|
State<LookAheadScreen> createState() => _LookAheadScreenState();
|
|
}
|
|
|
|
class _LookAheadScreenState extends State<LookAheadScreen> {
|
|
var _period = _PeriodMode.monthly;
|
|
late DateTime _cursor;
|
|
List<RecurringItem>? _cachedItems;
|
|
int? _itemsCacheKey;
|
|
|
|
@override
|
|
void initState() {
|
|
super.initState();
|
|
final today = dateOnly(DateTime.now());
|
|
// Default: end of next calendar month.
|
|
_cursor = monthStart(DateTime(today.year, today.month + 1));
|
|
}
|
|
|
|
DateTime get _today => dateOnly(DateTime.now());
|
|
|
|
DateTime get _minMonth => monthStart(_today);
|
|
|
|
/// Inclusive end date for the selected period.
|
|
DateTime get _through {
|
|
if (_period == _PeriodMode.yearly) {
|
|
return DateTime(_cursor.year, 12, 31);
|
|
}
|
|
return DateTime(_cursor.year, _cursor.month + 1, 0);
|
|
}
|
|
|
|
String get _periodTitle {
|
|
if (_period == _PeriodMode.yearly) return '${_cursor.year}';
|
|
return formatMonthYear(_cursor);
|
|
}
|
|
|
|
DateTime _maxMonthFor(int maxYears) {
|
|
final t = _today;
|
|
return DateTime(t.year + maxYears, t.month);
|
|
}
|
|
|
|
bool _canGoBack() {
|
|
if (_period == _PeriodMode.yearly) {
|
|
return _cursor.year > _today.year;
|
|
}
|
|
return monthStart(_cursor).isAfter(_minMonth);
|
|
}
|
|
|
|
bool _canGoForward(int maxYears) {
|
|
if (_period == _PeriodMode.yearly) {
|
|
return _cursor.year < _today.year + maxYears;
|
|
}
|
|
return monthStart(_cursor).isBefore(_maxMonthFor(maxYears));
|
|
}
|
|
|
|
void _clampCursor(int maxYears) {
|
|
if (_period == _PeriodMode.yearly) {
|
|
if (_cursor.year > _today.year + maxYears) {
|
|
_cursor = DateTime(_today.year + maxYears);
|
|
}
|
|
} else {
|
|
final maxMonth = _maxMonthFor(maxYears);
|
|
if (_cursor.isAfter(maxMonth)) _cursor = maxMonth;
|
|
}
|
|
}
|
|
|
|
void _setPeriod(_PeriodMode mode, int maxYears) {
|
|
if (mode == _period) return;
|
|
setState(() {
|
|
_period = mode;
|
|
if (mode == _PeriodMode.yearly) {
|
|
_cursor = DateTime(_cursor.year);
|
|
if (_cursor.year < _today.year) _cursor = DateTime(_today.year);
|
|
if (_cursor.year > _today.year + maxYears) {
|
|
_cursor = DateTime(_today.year + maxYears);
|
|
}
|
|
} else {
|
|
final month = DateTime(_cursor.year, _today.month);
|
|
_cursor = month.isBefore(_minMonth) ? _minMonth : monthStart(month);
|
|
final maxMonth = _maxMonthFor(maxYears);
|
|
if (_cursor.isAfter(maxMonth)) _cursor = maxMonth;
|
|
}
|
|
});
|
|
}
|
|
|
|
void _go(int delta, int maxYears) {
|
|
setState(() {
|
|
if (_period == _PeriodMode.yearly) {
|
|
final next = DateTime(_cursor.year + delta);
|
|
if (next.year < _today.year || next.year > _today.year + maxYears) {
|
|
return;
|
|
}
|
|
_cursor = next;
|
|
} else {
|
|
final next = addMonths(monthStart(_cursor), delta);
|
|
final maxMonth = _maxMonthFor(maxYears);
|
|
if (next.isBefore(_minMonth) || next.isAfter(maxMonth)) return;
|
|
_cursor = next;
|
|
}
|
|
});
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
if (ShellTabScope.of(context) != LookAheadScreen.tabIndex) {
|
|
return const SizedBox.expand();
|
|
}
|
|
return SkipBuildWhenCovered(
|
|
builder: (context) => _buildContent(context),
|
|
);
|
|
}
|
|
|
|
Widget _buildContent(BuildContext context) {
|
|
final bank = context.watch<BankController>();
|
|
final meta = context.watch<TxMetaController>();
|
|
final maxYears =
|
|
context.watch<PreferencesController>().lookAheadMaxYears;
|
|
final maxMonth = _maxMonthFor(maxYears);
|
|
final needsClamp = _period == _PeriodMode.yearly
|
|
? _cursor.year > _today.year + maxYears
|
|
: _cursor.isAfter(maxMonth);
|
|
if (needsClamp) {
|
|
WidgetsBinding.instance.addPostFrameCallback((_) {
|
|
if (!mounted) return;
|
|
setState(() => _clampCursor(maxYears));
|
|
});
|
|
}
|
|
final theme = Theme.of(context);
|
|
final colors = theme.colorScheme;
|
|
|
|
final balance = bank.balance;
|
|
final currency = balance?.currency ??
|
|
(bank.transactions.isNotEmpty
|
|
? bank.transactions.first.currency
|
|
: 'EUR');
|
|
final currentAmount = balance?.amount ?? 0;
|
|
final today = _today;
|
|
final through = _through;
|
|
final cacheKey = Object.hash(
|
|
meta.storeRevision,
|
|
identityHashCode(bank.transactions),
|
|
);
|
|
if (_cachedItems == null || _itemsCacheKey != cacheKey) {
|
|
_itemsCacheKey = cacheKey;
|
|
_cachedItems = recurringItemsFromTemplates(
|
|
templates: meta.recurringTemplates,
|
|
transactions: bank.transactions,
|
|
isInternalTransfer: (tx) => meta.metaFor(tx).internalTransfer,
|
|
labelIdsFor: meta.labelIdsFor,
|
|
labelName: (id) => meta.labelById(id)?.name ?? 'label',
|
|
);
|
|
}
|
|
final items = _cachedItems!;
|
|
|
|
final projected = projectedOccurrences(
|
|
items: items,
|
|
from: today,
|
|
to: through,
|
|
);
|
|
final predicted = projected.fold<double>(
|
|
currentAmount,
|
|
(sum, row) => sum + row.item.amount,
|
|
);
|
|
final delta = predicted - currentAmount;
|
|
|
|
var income = 0.0;
|
|
var expenses = 0.0;
|
|
for (final row in projected) {
|
|
if (row.item.amount >= 0) {
|
|
income += row.item.amount;
|
|
} else {
|
|
expenses += -row.item.amount;
|
|
}
|
|
}
|
|
|
|
// One occurrence of each template per month (template run-rate).
|
|
var monthlyIncome = 0.0;
|
|
var monthlyExpense = 0.0;
|
|
for (final item in items) {
|
|
if (item.amount >= 0) {
|
|
monthlyIncome += item.amount;
|
|
} else {
|
|
monthlyExpense += -item.amount;
|
|
}
|
|
}
|
|
|
|
return Scaffold(
|
|
appBar: AppBar(
|
|
title: const Text('Look ahead'),
|
|
actions: bankAppBarActions(context: context),
|
|
),
|
|
body: ResponsiveBody(
|
|
child: ListView(
|
|
physics: const AlwaysScrollableScrollPhysics(),
|
|
padding: const EdgeInsets.fromLTRB(0, 8, 0, 32),
|
|
children: [
|
|
_PeriodToolbar(
|
|
period: _period,
|
|
onPeriodChanged: (mode) => _setPeriod(mode, maxYears),
|
|
),
|
|
const SizedBox(height: 10),
|
|
_PeriodNavigator(
|
|
title: _periodTitle,
|
|
canGoBack: _canGoBack(),
|
|
canGoForward: _canGoForward(maxYears),
|
|
onBack: () => _go(-1, maxYears),
|
|
onForward: () => _go(1, maxYears),
|
|
backTooltip:
|
|
_period == _PeriodMode.yearly ? 'Previous year' : 'Previous month',
|
|
forwardTooltip:
|
|
_period == _PeriodMode.yearly ? 'Next year' : 'Next month',
|
|
),
|
|
const SizedBox(height: 12),
|
|
Material(
|
|
color: Colors.transparent,
|
|
child: Ink(
|
|
width: double.infinity,
|
|
padding: const EdgeInsets.all(24),
|
|
decoration: BoxDecoration(
|
|
borderRadius: BorderRadius.circular(20),
|
|
gradient: LinearGradient(
|
|
colors: [colors.primary, colors.tertiary],
|
|
),
|
|
boxShadow: [
|
|
BoxShadow(
|
|
color: colors.primary.withValues(alpha: 0.28),
|
|
blurRadius: 20,
|
|
offset: const Offset(0, 10),
|
|
),
|
|
],
|
|
),
|
|
child: Column(
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
|
children: [
|
|
Text(
|
|
'Projected balance',
|
|
style: theme.textTheme.labelMedium?.copyWith(
|
|
color: colors.onPrimary.withValues(alpha: 0.8),
|
|
),
|
|
),
|
|
const SizedBox(height: 4),
|
|
Text(
|
|
'As of ${_formatLongDate(through)}',
|
|
style: theme.textTheme.titleMedium?.copyWith(
|
|
color: colors.onPrimary,
|
|
fontWeight: FontWeight.w700,
|
|
),
|
|
),
|
|
const SizedBox(height: 12),
|
|
Text(
|
|
formatMoney(predicted, currency),
|
|
style: theme.textTheme.headlineMedium?.copyWith(
|
|
color: colors.onPrimary,
|
|
),
|
|
),
|
|
const SizedBox(height: 8),
|
|
Text(
|
|
balance == null
|
|
? 'No current balance loaded — projection starts at 0'
|
|
: 'Now ${formatMoney(currentAmount, currency)}'
|
|
' · ${delta >= 0 ? '+' : ''}'
|
|
'${formatMoney(delta, currency)} by then',
|
|
style: theme.textTheme.labelMedium?.copyWith(
|
|
color: colors.onPrimary.withValues(alpha: 0.9),
|
|
),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
const SizedBox(height: 14),
|
|
Row(
|
|
children: [
|
|
Expanded(
|
|
child: _SummaryCard(
|
|
icon: Icons.south_west,
|
|
iconBackground: AppTheme.accent.withValues(alpha: 0.18),
|
|
iconColor: AppTheme.accent,
|
|
amount: formatMoney(income, currency),
|
|
label: 'Income',
|
|
),
|
|
),
|
|
const SizedBox(width: 12),
|
|
Expanded(
|
|
child: _SummaryCard(
|
|
icon: Icons.north_east,
|
|
iconBackground: AppTheme.expense.withValues(alpha: 0.18),
|
|
iconColor: AppTheme.expense,
|
|
amount: formatMoney(expenses, currency),
|
|
label: 'Expenses',
|
|
),
|
|
),
|
|
],
|
|
),
|
|
const SizedBox(height: 20),
|
|
Row(
|
|
children: [
|
|
Expanded(
|
|
child: Text(
|
|
'Recurring spendings',
|
|
style: theme.textTheme.titleMedium,
|
|
),
|
|
),
|
|
TextButton.icon(
|
|
onPressed: () => showCreateRecurringTemplateSheet(context),
|
|
icon: const Icon(Icons.add, size: 18),
|
|
label: const Text('New'),
|
|
),
|
|
],
|
|
),
|
|
const SizedBox(height: 4),
|
|
Text(
|
|
items.isEmpty
|
|
? 'Create a spending from a transaction, or tap New.'
|
|
: '${items.length} spending${items.length == 1 ? '' : 's'} · '
|
|
'projected income ${formatMoney(income, currency)} · '
|
|
'expenses ${formatMoney(expenses, currency)}.',
|
|
style: theme.textTheme.bodySmall?.copyWith(
|
|
color: colors.onSurfaceVariant,
|
|
),
|
|
),
|
|
const SizedBox(height: 10),
|
|
Row(
|
|
children: [
|
|
Expanded(
|
|
child: _SummaryCard(
|
|
icon: Icons.south_west,
|
|
iconBackground: AppTheme.accent.withValues(alpha: 0.18),
|
|
iconColor: AppTheme.accent,
|
|
amount: formatMoney(monthlyIncome, currency),
|
|
label: 'Monthly income',
|
|
),
|
|
),
|
|
const SizedBox(width: 12),
|
|
Expanded(
|
|
child: _SummaryCard(
|
|
icon: Icons.north_east,
|
|
iconBackground: AppTheme.expense.withValues(alpha: 0.18),
|
|
iconColor: AppTheme.expense,
|
|
amount: formatMoney(monthlyExpense, currency),
|
|
label: 'Monthly expense',
|
|
),
|
|
),
|
|
],
|
|
),
|
|
const SizedBox(height: 10),
|
|
if (items.isEmpty)
|
|
const EmptyState(
|
|
icon: Icons.event_repeat_outlined,
|
|
title: 'No recurring spendings',
|
|
message:
|
|
'Open a transaction and tap Create recurring spending, '
|
|
'or use New to pick a transaction or label average.',
|
|
)
|
|
else
|
|
Card(
|
|
color: colors.surfaceContainer,
|
|
elevation: 0,
|
|
clipBehavior: Clip.antiAlias,
|
|
shape: RoundedRectangleBorder(
|
|
borderRadius: BorderRadius.circular(16),
|
|
),
|
|
child: Column(
|
|
children: [
|
|
for (var i = 0; i < items.length; i++) ...[
|
|
if (i > 0)
|
|
Divider(
|
|
height: 1,
|
|
indent: 16,
|
|
color: colors.outlineVariant.withValues(alpha: 0.4),
|
|
),
|
|
_TemplateTile(
|
|
item: items[i],
|
|
template:
|
|
meta.recurringTemplateById(items[i].templateId),
|
|
transactions: bank.transactions,
|
|
),
|
|
],
|
|
],
|
|
),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
class _PeriodToolbar extends StatelessWidget {
|
|
const _PeriodToolbar({
|
|
required this.period,
|
|
required this.onPeriodChanged,
|
|
});
|
|
|
|
final _PeriodMode period;
|
|
final ValueChanged<_PeriodMode> onPeriodChanged;
|
|
|
|
static const _segmentStyle = ButtonStyle(
|
|
visualDensity: VisualDensity(horizontal: -4, vertical: -3),
|
|
tapTargetSize: MaterialTapTargetSize.shrinkWrap,
|
|
padding: WidgetStatePropertyAll(EdgeInsets.symmetric(horizontal: 10)),
|
|
minimumSize: WidgetStatePropertyAll(Size(0, 32)),
|
|
);
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Align(
|
|
alignment: Alignment.centerLeft,
|
|
child: SegmentedButton<_PeriodMode>(
|
|
showSelectedIcon: false,
|
|
style: _segmentStyle,
|
|
segments: const [
|
|
ButtonSegment(
|
|
value: _PeriodMode.monthly,
|
|
label: Text('Month'),
|
|
),
|
|
ButtonSegment(
|
|
value: _PeriodMode.yearly,
|
|
label: Text('Year'),
|
|
),
|
|
],
|
|
selected: {period},
|
|
onSelectionChanged: (selection) {
|
|
onPeriodChanged(selection.first);
|
|
},
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
class _PeriodNavigator extends StatelessWidget {
|
|
const _PeriodNavigator({
|
|
required this.title,
|
|
required this.canGoBack,
|
|
required this.canGoForward,
|
|
required this.onBack,
|
|
required this.onForward,
|
|
required this.backTooltip,
|
|
required this.forwardTooltip,
|
|
});
|
|
|
|
final String title;
|
|
final bool canGoBack;
|
|
final bool canGoForward;
|
|
final VoidCallback onBack;
|
|
final VoidCallback onForward;
|
|
final String backTooltip;
|
|
final String forwardTooltip;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
final theme = Theme.of(context);
|
|
|
|
return Row(
|
|
children: [
|
|
IconButton(
|
|
tooltip: backTooltip,
|
|
onPressed: canGoBack ? onBack : null,
|
|
visualDensity: const VisualDensity(horizontal: -4, vertical: -4),
|
|
constraints: const BoxConstraints(minWidth: 32, minHeight: 32),
|
|
padding: EdgeInsets.zero,
|
|
icon: const Icon(Icons.chevron_left, size: 22),
|
|
),
|
|
Expanded(
|
|
child: Text(
|
|
title,
|
|
textAlign: TextAlign.center,
|
|
style: theme.textTheme.titleMedium?.copyWith(
|
|
fontWeight: FontWeight.w700,
|
|
),
|
|
),
|
|
),
|
|
IconButton(
|
|
tooltip: forwardTooltip,
|
|
onPressed: canGoForward ? onForward : null,
|
|
visualDensity: const VisualDensity(horizontal: -4, vertical: -4),
|
|
constraints: const BoxConstraints(minWidth: 32, minHeight: 32),
|
|
padding: EdgeInsets.zero,
|
|
icon: const Icon(Icons.chevron_right, size: 22),
|
|
),
|
|
],
|
|
);
|
|
}
|
|
}
|
|
|
|
class _SummaryCard extends StatelessWidget {
|
|
const _SummaryCard({
|
|
required this.icon,
|
|
required this.iconBackground,
|
|
required this.iconColor,
|
|
required this.amount,
|
|
required this.label,
|
|
});
|
|
|
|
final IconData icon;
|
|
final Color iconBackground;
|
|
final Color iconColor;
|
|
final String amount;
|
|
final String label;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
final theme = Theme.of(context);
|
|
final colors = theme.colorScheme;
|
|
|
|
return Card(
|
|
color: colors.surfaceContainer,
|
|
elevation: 0,
|
|
shape: RoundedRectangleBorder(
|
|
borderRadius: BorderRadius.circular(18),
|
|
),
|
|
child: Padding(
|
|
padding: const EdgeInsets.fromLTRB(14, 14, 14, 14),
|
|
child: Row(
|
|
children: [
|
|
Container(
|
|
width: 42,
|
|
height: 42,
|
|
decoration: BoxDecoration(
|
|
color: iconBackground,
|
|
borderRadius: BorderRadius.circular(12),
|
|
),
|
|
child: Icon(icon, color: iconColor, size: 22),
|
|
),
|
|
const SizedBox(width: 12),
|
|
Expanded(
|
|
child: Column(
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
|
children: [
|
|
Text(
|
|
amount,
|
|
maxLines: 1,
|
|
overflow: TextOverflow.ellipsis,
|
|
style: theme.textTheme.titleMedium?.copyWith(
|
|
fontWeight: FontWeight.w700,
|
|
color: colors.onSurface,
|
|
),
|
|
),
|
|
const SizedBox(height: 2),
|
|
Text(
|
|
label.toUpperCase(),
|
|
style: theme.textTheme.labelSmall?.copyWith(
|
|
letterSpacing: 0.6,
|
|
fontWeight: FontWeight.w600,
|
|
color: colors.onSurfaceVariant,
|
|
),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
String _formatLongDate(DateTime date) {
|
|
const months = [
|
|
'January',
|
|
'February',
|
|
'March',
|
|
'April',
|
|
'May',
|
|
'June',
|
|
'July',
|
|
'August',
|
|
'September',
|
|
'October',
|
|
'November',
|
|
'December',
|
|
];
|
|
return '${date.day} ${months[date.month - 1]} ${date.year}';
|
|
}
|
|
|
|
class _TemplateTile extends StatelessWidget {
|
|
const _TemplateTile({
|
|
required this.item,
|
|
required this.template,
|
|
required this.transactions,
|
|
});
|
|
|
|
final RecurringItem item;
|
|
final RecurringTemplate? template;
|
|
final List<BankTransaction> transactions;
|
|
|
|
BankTransaction? get _sourceTx {
|
|
final id = item.sourceTxId;
|
|
if (id == null) return null;
|
|
for (final tx in transactions) {
|
|
if (tx.id == id) return tx;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
final theme = Theme.of(context);
|
|
final colors = theme.colorScheme;
|
|
final income = item.amount >= 0;
|
|
final tpl = template;
|
|
|
|
return ListTile(
|
|
leading: IconButton(
|
|
tooltip: 'Edit spending',
|
|
icon: Icon(Icons.tune, color: colors.primary),
|
|
onPressed: tpl == null
|
|
? null
|
|
: () => showEditRecurringTemplateSheet(context, template: tpl),
|
|
),
|
|
title: Text(
|
|
item.description,
|
|
maxLines: 1,
|
|
overflow: TextOverflow.ellipsis,
|
|
),
|
|
subtitle: Text(
|
|
[
|
|
'Day ${item.dayOfMonth}',
|
|
if (item.ruleSummary.isNotEmpty) item.ruleSummary,
|
|
].join(' · '),
|
|
style: theme.textTheme.bodySmall?.copyWith(
|
|
color: colors.onSurfaceVariant,
|
|
),
|
|
),
|
|
trailing: Text(
|
|
formatMoney(item.amount, item.currency),
|
|
style: theme.textTheme.titleSmall?.copyWith(
|
|
fontWeight: FontWeight.w700,
|
|
color: income ? AppTheme.accent : AppTheme.expense,
|
|
),
|
|
),
|
|
onTap: () {
|
|
final tx = _sourceTx;
|
|
if (tx == null) return;
|
|
Navigator.of(context).push(
|
|
MaterialPageRoute<void>(
|
|
builder: (_) => TransactionDetailScreen(tx: tx),
|
|
),
|
|
);
|
|
},
|
|
);
|
|
}
|
|
}
|