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chore(demo): implement DemoContent widget for role-based access control demonstration
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3 files changed

+177
-67
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3 files changed

+177
-67
lines changed

‎example/lib/demo_content.dart‎

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import 'dart:developer';
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import 'package:flutter/material.dart';
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import 'package:flutter_policy_engine/flutter_policy_engine.dart';
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class DemoContent extends StatefulWidget {
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const DemoContent({super.key});
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@override
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State<DemoContent> createState() => _DemoContentState();
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}
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class _DemoContentState extends State<DemoContent> {
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String _currentRole = 'guest';
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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.all(16.0),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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'Rol actual: $_currentRole',
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style: Theme.of(context).textTheme.headlineSmall,
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),
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const SizedBox(height: 16),
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// Selector de rol
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Row(
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children: [
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_buildRoleButton('guest'),
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const SizedBox(width: 8),
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_buildRoleButton('user'),
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const SizedBox(width: 8),
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_buildRoleButton('admin'),
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],
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),
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const SizedBox(height: 32),
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// Ejemplos de PolicyWidget
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_buildPolicyExample('LoginPage', 'Página de Login'),
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_buildPolicyExample('Dashboard', 'Dashboard'),
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_buildPolicyExample('UserManagement', 'Gestión de Usuarios'),
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_buildPolicyExample('Settings', 'Configuración'),
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const SizedBox(height: 32),
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],
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),
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);
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}
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Widget _buildRoleButton(String role) {
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return ElevatedButton(
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onPressed: () {
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setState(() {
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_currentRole = role;
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});
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},
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style: ElevatedButton.styleFrom(
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backgroundColor: _currentRole == role ? Colors.blue : Colors.grey,
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),
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child: Text(role),
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);
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}
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Widget _buildPolicyExample(String content, String displayName) {
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return Padding(
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padding: const EdgeInsets.only(bottom: 16),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text('$displayName:'),
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const SizedBox(height: 4),
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PolicyWidget(
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role: _currentRole,
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content: content,
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fallback: Card(
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color: Colors.red[100],
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child: Padding(
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padding: const EdgeInsets.all(16),
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child: Text('Acceso denegado para $displayName'),
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),
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),
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onAccessDenied: () {
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log('Acceso denegado para $_currentRole a $content');
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},
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child: Card(
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color: Colors.green[100],
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child: Padding(
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padding: const EdgeInsets.all(16),
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child: Text('Acceso permitido a $displayName'),
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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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}

‎example/lib/main.dart‎

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@@ -1,7 +1,5 @@
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import 'dart:developer';
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import 'package:flutter/material.dart';
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import 'package:flutter_policy_engine/flutter_policy_engine.dart';
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import 'package:flutter_policy_engine_example/policy_engine_demo.dart';
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void main() {
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runApp(const MyApp());
@@ -22,67 +20,3 @@ class MyApp extends StatelessWidget {
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);
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}
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}
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class PolicyEngineDemo extends StatefulWidget {
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const PolicyEngineDemo({super.key});
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@override
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State<StatefulWidget> createState() {
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return _PolicyEngineDemoState();
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}
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}
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class _PolicyEngineDemoState extends State<PolicyEngineDemo> {
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late PolicyManager policyManager;
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bool _isInitialized = false;
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@override
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void initState() {
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super.initState();
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_initializePolicyManager();
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}
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Future<void> _initializePolicyManager() async {
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policyManager = PolicyManager();
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final policies = {
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"admin": ["LoginPage", "Dashboard", "UserManagement", "Settings"],
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"user": ["LoginPage", "Dashboard"],
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"guest": ["LoginPage"]
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};
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try {
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await policyManager.initialize(policies);
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setState(() {
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_isInitialized = true;
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});
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} catch (e) {
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log(e.toString());
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setState(() {
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_isInitialized = false;
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});
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}
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}
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@override
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Widget build(BuildContext context) {
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if (!_isInitialized) {
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return Scaffold(
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appBar: AppBar(
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title: const Text('Policy Engine Demo'),
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),
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body: const Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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CircularProgressIndicator(),
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SizedBox(height: 16),
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Text('Loading policies...'),
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],
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),
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),
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);
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}
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return const Center(
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child: Text('Policies loaded'),
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);
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}
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}

‎example/lib/policy_engine_demo.dart‎

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import 'dart:developer';
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import 'package:flutter/material.dart';
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import 'package:flutter_policy_engine/flutter_policy_engine.dart';
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import 'package:flutter_policy_engine_example/demo_content.dart';
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class PolicyEngineDemo extends StatefulWidget {
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const PolicyEngineDemo({super.key});
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@override
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State<StatefulWidget> createState() {
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return _PolicyEngineDemoState();
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}
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}
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class _PolicyEngineDemoState extends State<PolicyEngineDemo> {
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late PolicyManager policyManager;
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bool _isInitialized = false;
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@override
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void initState() {
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super.initState();
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_initializePolicyManager();
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}
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Future<void> _initializePolicyManager() async {
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policyManager = PolicyManager();
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final policies = {
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"admin": ["LoginPage", "Dashboard", "UserManagement", "Settings"],
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"user": ["LoginPage", "Dashboard"],
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"guest": ["LoginPage"]
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};
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try {
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await policyManager.initialize(policies);
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setState(() {
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_isInitialized = true;
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});
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} catch (e) {
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log(e.toString());
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setState(() {
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_isInitialized = false;
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});
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}
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}
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@override
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Widget build(BuildContext context) {
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if (!_isInitialized) {
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return Scaffold(
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appBar: AppBar(
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title: const Text('Policy Engine Demo'),
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),
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body: const Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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CircularProgressIndicator(),
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SizedBox(height: 16),
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Text('Loading policies...'),
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],
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),
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),
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);
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}
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return PolicyProvider(
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policyManager: policyManager,
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child: Scaffold(
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appBar: AppBar(
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title: const Text('Policy Engine Demo'),
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),
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body: const DemoContent(),
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),
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);
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}
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}

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