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Anbarasu22004
2026-07-29 11:41:53 +05:30
parent fcccf22bac
commit d72522e737
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lib/presentation/receipt/screens/receipt_screen.dart Normal file
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import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_animate/flutter_animate.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import '../../../app/providers.dart';
import '../../../core/constants/app_constants.dart';
import '../../../core/router/app_router.dart';
import '../../../core/theme/app_colors.dart';
import '../../../core/theme/app_dimens.dart';
import '../../../core/theme/app_typography.dart';
import '../../../core/utils/extensions.dart';
import '../../../core/utils/formatters.dart';
import '../../../core/widgets/glass_card.dart';
import '../../../core/widgets/primary_button.dart';
import '../../../domain/entities/transaction.dart';
import '../../pos/providers/cart_controller.dart';
import '../widgets/receipt_preview.dart';
/// Confirmation screen. Counts down and starts the next sale on its own so an
/// unattended terminal never sits on a finished bill.
class ReceiptScreen extends ConsumerStatefulWidget {
const ReceiptScreen({super.key, required this.transaction});
final SaleTransaction transaction;
@override
ConsumerState<ReceiptScreen> createState() => _ReceiptScreenState();
}
class _ReceiptScreenState extends ConsumerState<ReceiptScreen> {
late int _seconds = AppConstants.postSaleResetDelay.inSeconds + 5;
Timer? _timer;
@override
void initState() {
super.initState();
_timer = Timer.periodic(const Duration(seconds: 1), (t) {
if (!mounted) return;
setState(() => _seconds--);
if (_seconds <= 0) _newSale();
});
}
@override
void dispose() {
_timer?.cancel();
super.dispose();
}
void _cancelAutoReturn() {
_timer?.cancel();
if (mounted) setState(() => _seconds = -1);
}
void _newSale() {
_timer?.cancel();
ref.read(cartControllerProvider.notifier).reset();
if (mounted) context.go(AppRoutes.welcome);
}
void _continueBilling() {
_timer?.cancel();
ref.read(cartControllerProvider.notifier).reset();
if (mounted) context.go(AppRoutes.pos);
}
@override
Widget build(BuildContext context) {
final txn = widget.transaction;
return Scaffold(
backgroundColor: AppColors.background,
body: SafeArea(
child: Listener(
onPointerDown: (_) => _cancelAutoReturn(),
child: Padding(
padding: const EdgeInsets.all(AppSpacing.xxl),
child: context.isCompact
? SingleChildScrollView(
child: Column(children: [
_summary(txn),
const SizedBox(height: AppSpacing.lg),
SizedBox(
height: 480,
child: ReceiptPreview(transaction: txn),
),
]),
)
: Row(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Expanded(flex: 5, child: _summary(txn)),
const SizedBox(width: AppSpacing.xxl),
Expanded(
flex: 4,
child: ReceiptPreview(transaction: txn),
),
],
),
),
),
),
);
}
Widget _summary(SaleTransaction txn) {
return GlassCard(
padding: const EdgeInsets.all(AppSpacing.xxxl),
radius: AppRadius.xxl,
shadows: AppColors.shadowMd,
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Center(
child: Container(
width: 84,
height: 84,
decoration: const BoxDecoration(
color: AppColors.successSurface,
shape: BoxShape.circle,
),
child: const Icon(Icons.check_rounded,
size: 44, color: AppColors.success),
)
.animate()
.scale(
duration: 340.ms,
curve: Curves.easeOutBack,
begin: const Offset(0.5, 0.5),
)
.fadeIn(),
),
const SizedBox(height: AppSpacing.xl),
Text('Sale complete',
textAlign: TextAlign.center,
style: context.text.headlineMedium),
const SizedBox(height: AppSpacing.xs),
Text(
'${txn.invoiceNumber} · ${Formatters.dateTime(txn.createdAt)}',
textAlign: TextAlign.center,
style: context.text.bodySmall,
),
const SizedBox(height: AppSpacing.xxl),
Container(
padding: const EdgeInsets.all(AppSpacing.xl),
decoration: BoxDecoration(
color: AppColors.primarySurface,
borderRadius: AppRadius.brLg,
),
child: Column(children: [
Text('Amount paid', style: context.text.labelMedium),
Text(
Formatters.money(txn.total),
style: AppTypography.money(36, color: AppColors.primary),
),
const SizedBox(height: AppSpacing.md),
const Divider(),
const SizedBox(height: AppSpacing.md),
_row('Paid via', txn.paymentSummary),
if (txn.changeDue > 0)
_row('Change returned', Formatters.money(txn.changeDue),
highlight: AppColors.success),
_row('Items', '${txn.cart.lineCount}'),
if (txn.customer != null) ...[
_row('Customer', txn.customer!.name),
_row('Points earned', '+${txn.pointsEarned}',
highlight: AppColors.success),
if (txn.pointsRedeemed > 0)
_row('Points redeemed', '-${txn.pointsRedeemed}'),
],
if (txn.cart.totalSavings > 0)
_row(
'Customer saved',
Formatters.money(txn.cart.totalSavings),
highlight: AppColors.success,
),
]),
),
const SizedBox(height: AppSpacing.xxl),
Row(children: [
Expanded(
child: PrimaryButton(
label: 'Reprint',
icon: Icons.print_outlined,
tone: ButtonTone.neutral,
onPressed: () {
_cancelAutoReturn();
ref.read(receiptServiceProvider).printWithDialog(txn);
},
),
),
const SizedBox(width: AppSpacing.md),
Expanded(
child: PrimaryButton(
label: 'Share',
icon: Icons.ios_share_rounded,
tone: ButtonTone.neutral,
onPressed: () {
_cancelAutoReturn();
ref.read(receiptServiceProvider).share(txn);
},
),
),
]),
const SizedBox(height: AppSpacing.md),
PrimaryButton(
label: _seconds > 0
? 'New Sale ($_seconds)'
: 'New Sale',
icon: Icons.add_shopping_cart_rounded,
large: true,
onPressed: _newSale,
),
const SizedBox(height: AppSpacing.sm),
TextButton(
onPressed: _continueBilling,
child: const Text('Back to billing screen'),
),
],
),
);
}
Widget _row(String label, String value, {Color? highlight}) => Padding(
padding: const EdgeInsets.symmetric(vertical: AppSpacing.xs),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(label,
style: const TextStyle(
fontSize: 13.5,
color: AppColors.textSecondary,
)),
Text(
value,
style: TextStyle(
fontSize: 13.5,
fontWeight: FontWeight.w700,
color: highlight ?? AppColors.textPrimary,
),
),
],
),
);
}

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lib/presentation/receipt/widgets/receipt_preview.dart Normal file
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import 'package:flutter/material.dart';
import '../../../core/constants/app_constants.dart';
import '../../../core/theme/app_colors.dart';
import '../../../core/theme/app_dimens.dart';
import '../../../core/theme/app_typography.dart';
import '../../../core/utils/formatters.dart';
import '../../../domain/entities/transaction.dart';
/// Paper-like preview of what the thermal printer produced.
class ReceiptPreview extends StatelessWidget {
const ReceiptPreview({super.key, required this.transaction});
final SaleTransaction transaction;
@override
Widget build(BuildContext context) {
final txn = transaction;
final cart = txn.cart;
return Container(
decoration: BoxDecoration(
color: AppColors.surface,
borderRadius: AppRadius.brLg,
boxShadow: AppColors.shadowMd,
),
child: Column(children: [
const _Perforation(top: true),
Expanded(
child: SingleChildScrollView(
padding: const EdgeInsets.symmetric(
horizontal: AppSpacing.xxl,
vertical: AppSpacing.xl,
),
child: DefaultTextStyle(
style: AppTypography.mono(11.5, color: AppColors.textPrimary),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Center(
child: Column(children: [
Text(
AppConstants.storeName.toUpperCase(),
style: AppTypography.mono(15)
.copyWith(fontWeight: FontWeight.w700),
),
const SizedBox(height: 3),
Text(AppConstants.storeAddress,
textAlign: TextAlign.center,
style: AppTypography.mono(9.5)),
Text('GSTIN: ${AppConstants.storeGstin}',
style: AppTypography.mono(9.5)),
const SizedBox(height: AppSpacing.sm),
Text('TAX INVOICE',
style: AppTypography.mono(11.5)
.copyWith(fontWeight: FontWeight.w700)),
]),
),
const _Dashes(),
_row('Invoice', txn.invoiceNumber),
_row('Date', Formatters.receiptStamp(txn.createdAt)),
_row('Cashier', txn.cashierName),
_row('Customer', txn.customer?.name ?? 'Walk-in'),
const _Dashes(),
Row(children: [
Expanded(flex: 5, child: _bold('Item')),
Expanded(
flex: 2,
child: _bold('Qty', align: TextAlign.center),
),
Expanded(
flex: 3,
child: _bold('Amount', align: TextAlign.right),
),
]),
const SizedBox(height: AppSpacing.xs),
...cart.lines.map((line) => Padding(
padding: const EdgeInsets.symmetric(vertical: 2.5),
child: Row(children: [
Expanded(flex: 5, child: Text(line.product.name)),
Expanded(
flex: 2,
child: Text(
line.quantity % 1 == 0
? line.quantity.toStringAsFixed(0)
: line.quantity.toStringAsFixed(2),
textAlign: TextAlign.center,
),
),
Expanded(
flex: 3,
child: Text(
line.payable.toStringAsFixed(2),
textAlign: TextAlign.right,
),
),
]),
)),
const _Dashes(),
_row('Subtotal', cart.subtotal.toStringAsFixed(2)),
if (cart.billDiscountTotal > 0)
_row('Discount',
'-${cart.billDiscountTotal.toStringAsFixed(2)}'),
if (cart.loyaltyRedemptionValue > 0)
_row('Points redeemed',
'-${cart.loyaltyRedemptionValue.toStringAsFixed(2)}'),
_row('CGST', cart.cgst.toStringAsFixed(2)),
_row('SGST', cart.sgst.toStringAsFixed(2)),
if (cart.roundOff != 0)
_row('Round off', cart.roundOff.toStringAsFixed(2)),
const _Dashes(),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text('TOTAL',
style: AppTypography.mono(15).copyWith(
fontWeight: FontWeight.w800,
color: AppColors.textPrimary,
)),
Text(
Formatters.money(txn.total),
style: AppTypography.mono(15).copyWith(
fontWeight: FontWeight.w800,
color: AppColors.textPrimary,
),
),
],
),
const _Dashes(),
...txn.payments.map((p) =>
_row(p.method.label, p.amount.toStringAsFixed(2))),
if (txn.changeDue > 0)
_row('Change', txn.changeDue.toStringAsFixed(2)),
if (txn.customer != null) ...[
const _Dashes(),
_row('Points earned', '+${txn.pointsEarned}'),
_row('Membership', txn.customer!.tier.label),
],
const SizedBox(height: AppSpacing.lg),
Center(
child: Column(children: [
_FakeBarcode(value: txn.invoiceNumber),
const SizedBox(height: AppSpacing.sm),
Text('Thank you for shopping with us!',
style: AppTypography.mono(11)
.copyWith(fontWeight: FontWeight.w700)),
const SizedBox(height: 2),
Text('Powered by Nearle POS',
style: AppTypography.mono(9)),
]),
),
],
),
),
),
),
const _Perforation(top: false),
]),
);
}
Widget _row(String label, String value) => Padding(
padding: const EdgeInsets.symmetric(vertical: 1.5),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [Text(label), Text(value)],
),
);
Widget _bold(String text, {TextAlign align = TextAlign.left}) => Text(
text,
textAlign: align,
style: AppTypography.mono(11.5).copyWith(
fontWeight: FontWeight.w700,
color: AppColors.textPrimary,
),
);
}
class _Dashes extends StatelessWidget {
const _Dashes();
@override
Widget build(BuildContext context) {
return const Padding(
padding: EdgeInsets.symmetric(vertical: AppSpacing.sm),
child: Text(
'- - - - - - - - - - - - - - - - - - - - - - - - - -',
maxLines: 1,
overflow: TextOverflow.clip,
style: TextStyle(color: AppColors.textTertiary, fontSize: 10),
),
);
}
}
/// Zig-zag torn-paper edge.
class _Perforation extends StatelessWidget {
const _Perforation({required this.top});
final bool top;
@override
Widget build(BuildContext context) {
return SizedBox(
height: 10,
child: CustomPaint(
size: const Size(double.infinity, 10),
painter: _PerforationPainter(top: top),
),
);
}
}
class _PerforationPainter extends CustomPainter {
const _PerforationPainter({required this.top});
final bool top;
@override
void paint(Canvas canvas, Size size) {
const tooth = 12.0;
final path = Path();
if (top) {
path.moveTo(0, size.height);
for (var x = 0.0; x < size.width; x += tooth) {
path.lineTo(x + tooth / 2, 0);
path.lineTo(x + tooth, size.height);
}
path.lineTo(size.width, size.height);
} else {
path.moveTo(0, 0);
for (var x = 0.0; x < size.width; x += tooth) {
path.lineTo(x + tooth / 2, size.height);
path.lineTo(x + tooth, 0);
}
path.lineTo(size.width, 0);
}
path.close();
canvas.drawPath(path, Paint()..color = AppColors.surface);
}
@override
bool shouldRepaint(covariant _PerforationPainter oldDelegate) =>
oldDelegate.top != top;
}
/// Decorative Code-128-style bar rendering for the preview only.
class _FakeBarcode extends StatelessWidget {
const _FakeBarcode({required this.value});
final String value;
@override
Widget build(BuildContext context) {
final bars = value.codeUnits;
return Column(children: [
SizedBox(
height: 38,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
for (var i = 0; i < bars.length * 2; i++)
Container(
width: (bars[i ~/ 2] % 3 == 0) ? 3 : 1.5,
margin: const EdgeInsets.symmetric(horizontal: 0.7),
color: i.isEven
? AppColors.textPrimary
: Colors.transparent,
),
],
),
),
const SizedBox(height: 3),
Text(value, style: AppTypography.mono(9)),
]);
}
}