658 lines
21 KiB
Dart
658 lines
21 KiB
Dart
import 'dart:ui' as ui;
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import 'package:flutter/material.dart';
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import 'package:flutter_animate/flutter_animate.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:go_router/go_router.dart';
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import '../../../app/providers.dart';
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import '../../../core/constants/asset_paths.dart';
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import '../../../core/router/app_router.dart';
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import '../../../core/theme/app_colors.dart';
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import '../../../core/theme/app_dimens.dart';
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import '../../../core/utils/validators.dart';
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import '../../../core/widgets/brand_mark.dart';
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import '../../../core/widgets/primary_button.dart';
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import '../providers/auth_controller.dart';
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/// Store sign-in. The terminal shows this until a valid account is entered.
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///
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/// One centred card on a plain background, at every width. The split-screen
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/// version put a marketing panel beside the form, which meant the thing the
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/// person came here to use was never in the middle of the screen, was a
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/// different width on every monitor, and collapsed into a different layout
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/// below 1000px. A till is signed into at the start of a shift by someone who
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/// already bought the product; the pitch was costing the form its position.
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class LoginScreen extends ConsumerStatefulWidget {
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const LoginScreen({super.key});
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@override
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ConsumerState<LoginScreen> createState() => _LoginScreenState();
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}
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class _LoginScreenState extends ConsumerState<LoginScreen> {
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final _formKey = GlobalKey<FormState>();
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/// Which of the two default accounts the tabs are pointing at. Only a
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/// convenience for filling the fields — [AuthController.signIn] decides the
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/// role from the email that is actually submitted, so typing a different
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/// address over the top still signs in as that account.
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TerminalLogin _login = TerminalLogin.admin;
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late final _email = TextEditingController(text: _login.email);
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late final _password = TextEditingController(text: _login.password);
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bool _obscure = true;
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bool _rememberTerminal = true;
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void _selectLogin(TerminalLogin login) {
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setState(() {
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_login = login;
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_email.text = login.email;
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_password.text = login.password;
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});
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ref.read(authControllerProvider.notifier).clearError();
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}
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@override
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void dispose() {
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_email.dispose();
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_password.dispose();
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super.dispose();
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}
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Future<void> _submit() async {
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FocusScope.of(context).unfocus();
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if (!(_formKey.currentState?.validate() ?? false)) return;
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final ok = await ref.read(authControllerProvider.notifier).signIn(
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email: _email.text,
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password: _password.text,
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);
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if (ok && mounted) context.go(AppRoutes.pos);
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}
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@override
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Widget build(BuildContext context) {
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final auth = ref.watch(authControllerProvider);
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final session = ref.watch(cashierSessionProvider);
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final busy = auth is Authenticating;
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return Scaffold(
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backgroundColor: AppColors.background,
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body: Stack(
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fit: StackFit.expand,
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children: [
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const _Backdrop(),
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SafeArea(
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child: LayoutBuilder(
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builder: (context, box) {
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final tight = box.maxHeight < 620;
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return SingleChildScrollView(
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padding: EdgeInsets.symmetric(
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horizontal: AppSpacing.xl,
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vertical: tight ? AppSpacing.xl : AppSpacing.xxxl,
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),
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child: ConstrainedBox(
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// Fills the viewport so the card is centred vertically,
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// and scrolls the moment it cannot be.
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constraints: BoxConstraints(
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minHeight: (box.maxHeight - (tight ? 40 : 64))
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.clamp(0.0, double.infinity),
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),
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child: Center(
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child: ConstrainedBox(
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constraints: const BoxConstraints(maxWidth: 440),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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crossAxisAlignment: CrossAxisAlignment.stretch,
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children: [
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// _Masthead(tight: tight),
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SizedBox(
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height: tight ? AppSpacing.lg : AppSpacing.xl,
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),
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_Card(
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formKey: _formKey,
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email: _email,
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password: _password,
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obscure: _obscure,
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rememberTerminal: _rememberTerminal,
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login: _login,
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busy: busy,
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failure:
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auth is AuthFailure ? auth.message : null,
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onSelectLogin: _selectLogin,
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onToggleObscure: () =>
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setState(() => _obscure = !_obscure),
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onToggleRemember: (v) =>
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setState(() => _rememberTerminal = v ?? true),
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onSubmit: _submit,
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),
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const SizedBox(height: AppSpacing.lg),
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Center(
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child: Text(
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'Terminal ${session.terminalId}',
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style: TextStyle(
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fontSize: 11.5,
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color: Colors.white.withValues(alpha: 0.72),
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),
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),
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),
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],
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),
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),
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),
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),
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);
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},
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),
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),
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],
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),
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);
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}
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}
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/// The shopfront behind the form.
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///
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/// Blurred hard and darkened, because it is atmosphere rather than something
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/// to read: a sharp photograph under a sign-in card competes with the two
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/// fields the person came here to fill in. Scaled up slightly before the blur
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/// so the softened edges are pushed off-screen instead of showing as a pale
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/// border.
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///
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/// Falls back to the plain background colour if the asset is missing, so an
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/// undeclared file costs the login screen its atmosphere and not its function.
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class _Backdrop extends StatelessWidget {
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const _Backdrop();
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@override
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Widget build(BuildContext context) {
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return Stack(
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fit: StackFit.expand,
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children: [
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ClipRect(
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child: ImageFiltered(
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imageFilter: ui.ImageFilter.blur(sigmaX: 0, sigmaY: 0),
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child: Transform.scale(
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scale: 1.12,
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child: Image.asset(
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AssetPaths.loginBackground,
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fit: BoxFit.cover,
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filterQuality: FilterQuality.medium,
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errorBuilder: (context, _, __) =>
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const ColoredBox(color: AppColors.background),
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),
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),
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),
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),
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// Two layers, not one: the flat wash guarantees contrast for the white
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// masthead wherever the photograph happens to be pale, and the gradient
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// puts the darkest part behind the text rather than spreading it evenly
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// and flattening the image out.
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const ColoredBox(color: Color(0x8A1A0B22)),
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const DecoratedBox(
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decoration: BoxDecoration(
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gradient: LinearGradient(
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begin: Alignment.topCenter,
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end: Alignment.bottomCenter,
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colors: [Color(0x66000000), Color(0x22000000), Color(0x77000000)],
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),
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),
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),
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],
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);
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}
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}
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/// Mark and product name, directly above the card.
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class _Masthead extends StatelessWidget {
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const _Masthead({required this.tight});
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final bool tight;
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@override
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Widget build(BuildContext context) {
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return Column(
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children: [
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BrandMark(size: tight ? 48 : 60),
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const SizedBox(height: AppSpacing.md),
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const Text(
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'Nearle POS',
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style: TextStyle(
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fontSize: 22,
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fontWeight: FontWeight.w700,
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letterSpacing: -0.4,
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color: Colors.white,
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height: 1.2,
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shadows: [
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Shadow(color: Color(0x66000000), blurRadius: 12),
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],
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),
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),
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if (!tight) ...[
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const SizedBox(height: 2),
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Text(
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'Scanner-first billing for Indian retail',
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style: TextStyle(
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fontSize: 13,
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color: Colors.white.withValues(alpha: 0.82),
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shadows: const [
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Shadow(color: Color(0x55000000), blurRadius: 10),
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],
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),
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),
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],
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],
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).animate().fadeIn(duration: 260.ms);
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}
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}
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class _Card extends StatelessWidget {
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const _Card({
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required this.formKey,
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required this.email,
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required this.password,
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required this.obscure,
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required this.rememberTerminal,
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required this.login,
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required this.busy,
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required this.failure,
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required this.onSelectLogin,
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required this.onToggleObscure,
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required this.onToggleRemember,
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required this.onSubmit,
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});
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final GlobalKey<FormState> formKey;
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final TextEditingController email;
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final TextEditingController password;
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final bool obscure;
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final bool rememberTerminal;
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final TerminalLogin login;
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final bool busy;
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final String? failure;
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final ValueChanged<TerminalLogin> onSelectLogin;
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final VoidCallback onToggleObscure;
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final ValueChanged<bool?> onToggleRemember;
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final VoidCallback onSubmit;
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@override
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Widget build(BuildContext context) {
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return Container(
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padding: const EdgeInsets.all(AppSpacing.xxl),
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decoration: BoxDecoration(
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color: AppColors.surface,
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borderRadius: AppRadius.brXl,
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border: Border.all(color: AppColors.border),
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boxShadow: const [
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BoxShadow(
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color: Color(0x33101828),
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blurRadius: 40,
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offset: Offset(0, 16),
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),
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],
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),
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child: Form(
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key: formKey,
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autovalidateMode: AutovalidateMode.onUserInteraction,
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.stretch,
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mainAxisSize: MainAxisSize.min,
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children: [
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const Text(
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'Sign in to your store',
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style: TextStyle(
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fontSize: 19,
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fontWeight: FontWeight.w600,
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letterSpacing: -0.3,
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color: AppColors.textPrimary,
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),
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),
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const SizedBox(height: 2),
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const Text(
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'Use the credentials issued when your outlet was registered.',
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style: TextStyle(
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fontSize: 13,
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color: AppColors.textSecondary,
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height: 1.5,
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),
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),
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const SizedBox(height: AppSpacing.xl),
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_RoleSwitch(
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selected: login,
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enabled: !busy,
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onSelect: onSelectLogin,
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),
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const SizedBox(height: AppSpacing.sm),
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Text(
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login.blurb,
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style: const TextStyle(
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fontSize: 12.5,
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color: AppColors.textTertiary,
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height: 1.45,
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),
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),
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const SizedBox(height: AppSpacing.xl),
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const _Label('Store email'),
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TextFormField(
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controller: email,
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keyboardType: TextInputType.emailAddress,
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textInputAction: TextInputAction.next,
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enabled: !busy,
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validator: (v) => (v ?? '').trim().isEmpty
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? 'Store email is required'
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: Validators.emailOptional(v),
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decoration: const InputDecoration(
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hintText: 'store@example.in',
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prefixIcon: Icon(Icons.storefront_outlined),
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),
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),
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const SizedBox(height: AppSpacing.lg),
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const _Label('Password'),
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TextFormField(
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controller: password,
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obscureText: obscure,
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enabled: !busy,
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textInputAction: TextInputAction.done,
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onFieldSubmitted: (_) => onSubmit(),
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validator: (v) => (v ?? '').isEmpty
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? 'Password is required'
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: ((v ?? '').length < 6 ? 'Password looks too short' : null),
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decoration: InputDecoration(
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hintText: 'Enter your password',
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prefixIcon: const Icon(Icons.lock_outline_rounded),
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suffixIcon: IconButton(
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onPressed: onToggleObscure,
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icon: Icon(
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obscure
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? Icons.visibility_outlined
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: Icons.visibility_off_outlined,
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size: 20,
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),
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tooltip: obscure ? 'Show password' : 'Hide password',
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),
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),
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),
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const SizedBox(height: AppSpacing.sm),
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// Wrap, not Row — on a narrow tablet these would collide.
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Wrap(
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alignment: WrapAlignment.spaceBetween,
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crossAxisAlignment: WrapCrossAlignment.center,
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children: [
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InkWell(
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onTap: busy ? null : () => onToggleRemember(!rememberTerminal),
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borderRadius: AppRadius.brXs,
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child: Padding(
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padding: const EdgeInsets.symmetric(vertical: 4),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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SizedBox(
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width: 22,
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height: 22,
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child: Checkbox(
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value: rememberTerminal,
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onChanged: busy ? null : onToggleRemember,
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visualDensity: VisualDensity.compact,
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),
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),
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const SizedBox(width: AppSpacing.sm),
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const Text(
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'Remember this terminal',
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style: TextStyle(
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fontSize: 13,
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color: AppColors.textSecondary,
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),
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),
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],
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),
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),
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),
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TextButton(
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onPressed: busy ? null : () {},
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child: const Text('Forgot password?'),
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),
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],
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),
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if (failure != null) ...[
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const SizedBox(height: AppSpacing.sm),
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Container(
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padding: const EdgeInsets.all(AppSpacing.md),
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decoration: const BoxDecoration(
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color: AppColors.dangerSurface,
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borderRadius: AppRadius.brSm,
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),
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child: Row(
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children: [
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const Icon(Icons.error_outline_rounded,
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color: AppColors.danger, size: 18,),
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const SizedBox(width: AppSpacing.sm),
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Expanded(
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child: Text(
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failure!,
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style: const TextStyle(
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color: AppColors.danger,
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fontSize: 13,
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),
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),
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),
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],
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),
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).animate().shake(duration: 320.ms, hz: 3),
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],
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const SizedBox(height: AppSpacing.lg),
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PrimaryButton(
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label: 'Sign in',
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icon: Icons.login_rounded,
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large: true,
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busy: busy,
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onPressed: onSubmit,
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),
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const SizedBox(height: AppSpacing.lg),
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_DemoHint(
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login: login,
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onFill: busy ? null : () => onSelectLogin(login),
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),
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],
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),
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),
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).animate().fadeIn(duration: 300.ms).slideY(begin: 0.02, end: 0);
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}
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}
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class _Label extends StatelessWidget {
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const _Label(this.text);
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final String text;
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@override
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Widget build(BuildContext context) {
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return Padding(
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padding: const EdgeInsets.only(bottom: AppSpacing.sm),
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child: Text(
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text,
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style: const TextStyle(
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fontSize: 12.5,
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fontWeight: FontWeight.w600,
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color: AppColors.textSecondary,
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),
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),
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);
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}
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}
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/// Which of the two default accounts is being signed into.
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///
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/// The roles are not cosmetic — they decide whether the terminal opens the
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/// full shell or the billing screen alone, and whether signing out leaves the
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/// products behind — so the choice is made before the credentials rather than
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/// inferred from them afterwards.
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class _RoleSwitch extends StatelessWidget {
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const _RoleSwitch({
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required this.selected,
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required this.enabled,
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required this.onSelect,
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});
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final TerminalLogin selected;
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final bool enabled;
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final ValueChanged<TerminalLogin> onSelect;
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@override
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Widget build(BuildContext context) {
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return Container(
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padding: const EdgeInsets.all(4),
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decoration: BoxDecoration(
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color: AppColors.surfaceAlt,
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borderRadius: AppRadius.brSm,
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border: Border.all(color: AppColors.border),
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),
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child: Row(
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children: [
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for (final login in TerminalLogin.values)
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Expanded(
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child: _RoleTab(
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login: login,
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selected: login == selected,
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enabled: enabled,
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onTap: () => onSelect(login),
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),
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),
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],
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),
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);
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}
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}
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class _RoleTab extends StatelessWidget {
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const _RoleTab({
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required this.login,
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required this.selected,
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required this.enabled,
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required this.onTap,
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});
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final TerminalLogin login;
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final bool selected;
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final bool enabled;
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final VoidCallback onTap;
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@override
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Widget build(BuildContext context) {
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final icon = login == TerminalLogin.admin
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? Icons.admin_panel_settings_outlined
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: Icons.point_of_sale_rounded;
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return Material(
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color: Colors.transparent,
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child: InkWell(
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onTap: enabled ? onTap : null,
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borderRadius: AppRadius.brXs,
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child: AnimatedContainer(
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duration: const Duration(milliseconds: 160),
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height: 40,
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alignment: Alignment.center,
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decoration: BoxDecoration(
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color: selected ? AppColors.surface : Colors.transparent,
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borderRadius: AppRadius.brXs,
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border: Border.all(
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color: selected ? AppColors.primaryBorder : Colors.transparent,
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),
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),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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|
children: [
|
|
Icon(
|
|
icon,
|
|
size: 17,
|
|
color: selected ? AppColors.primary : AppColors.textSecondary,
|
|
),
|
|
const SizedBox(width: AppSpacing.sm),
|
|
Flexible(
|
|
child: Text(
|
|
login.label,
|
|
overflow: TextOverflow.ellipsis,
|
|
style: TextStyle(
|
|
fontSize: 13.5,
|
|
fontWeight: selected ? FontWeight.w700 : FontWeight.w500,
|
|
color:
|
|
selected ? AppColors.primary : AppColors.textSecondary,
|
|
),
|
|
),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
class _DemoHint extends StatelessWidget {
|
|
const _DemoHint({required this.login, this.onFill});
|
|
|
|
final TerminalLogin login;
|
|
final VoidCallback? onFill;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Container(
|
|
padding: const EdgeInsets.all(AppSpacing.md),
|
|
decoration: BoxDecoration(
|
|
color: AppColors.primarySurface,
|
|
borderRadius: AppRadius.brSm,
|
|
border: Border.all(color: AppColors.primaryBorder),
|
|
),
|
|
child: Row(
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
|
children: [
|
|
const Icon(Icons.info_outline_rounded,
|
|
size: 17, color: AppColors.primary,),
|
|
const SizedBox(width: AppSpacing.sm),
|
|
Expanded(
|
|
child: Column(
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
|
children: [
|
|
Text(
|
|
'Default ${login.label.toLowerCase()} account',
|
|
style: const TextStyle(
|
|
fontSize: 12.5,
|
|
fontWeight: FontWeight.w600,
|
|
color: AppColors.primary,
|
|
),
|
|
),
|
|
const SizedBox(height: 2),
|
|
SelectableText(
|
|
'${login.email} \u00b7 ${login.password}',
|
|
style: const TextStyle(
|
|
fontSize: 12,
|
|
color: AppColors.textSecondary,
|
|
),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
TextButton(
|
|
onPressed: onFill,
|
|
style: TextButton.styleFrom(
|
|
minimumSize: const Size(0, 32),
|
|
padding: const EdgeInsets.symmetric(horizontal: AppSpacing.sm),
|
|
),
|
|
child: const Text('Fill', style: TextStyle(fontSize: 12.5)),
|
|
),
|
|
],
|
|
),
|
|
);
|
|
}
|
|
}
|