Added Provider and DetailPage

lib/main.dart

@@ -1,7 +1,10 @@
+import 'package:briessenchecker/pages/detail_checklist_page.dart';
 import 'package:briessenchecker/pages/edit_checklist_page.dart';
+import 'package:briessenchecker/services/checklist_provider.dart';
 import 'package:briessenchecker/services/dbhelper.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_dotenv/flutter_dotenv.dart';
+import 'package:provider/provider.dart';
 import 'pages/dashboard_page.dart';
 import 'pages/landing_page.dart';
 import 'pages/login_page.dart';
@@ -9,7 +12,11 @@ import 'pages/login_page.dart';
 void main() async {
   await dotenv.load(fileName: 'secrets.env');
   await DbHelper.init();
-  runApp(const MyApp());
+  runApp(MultiProvider(providers: [
+    ChangeNotifierProvider(
+      create: (_) => ChecklistProvider(),
+    ),
+  ], child: const MyApp()));
 }
 
 class MyApp extends StatelessWidget {
@@ -30,6 +37,7 @@ class MyApp extends StatelessWidget {
         LoginPage.routeName: (context) => const LoginPage(),
         DashboardPage.routeName: (context) => const DashboardPage(),
         EditChecklistPage.routeName: (context) => const EditChecklistPage(),
+        DetailChecklistPage.routeName: (context) => const DetailChecklistPage(),
       },
     );
   }

lib/pages/dashboard_page.dart

@@ -1,6 +1,9 @@
 import 'package:briessenchecker/models/checklist.dart';
+import 'package:briessenchecker/pages/detail_checklist_page.dart';
+import 'package:briessenchecker/services/checklist_provider.dart';
 import 'package:briessenchecker/services/dbhelper.dart';
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 
 class DashboardPage extends StatefulWidget {
   const DashboardPage({super.key});
@@ -12,9 +15,16 @@ class DashboardPage extends StatefulWidget {
 
 class _DashboardPageState extends State<DashboardPage> {
   final Future<List<Checklist>> checklistFuture = DbHelper.fetchChecklist;
+  late ChecklistProvider checklistProvider;
+
+  @override
+  void initState() {
+    super.initState();
+  }
 
   @override
   Widget build(BuildContext context) {
+    checklistProvider = Provider.of<ChecklistProvider>(context, listen: true);
     return Scaffold(
       body: FutureBuilder(
         future: checklistFuture,
@@ -49,6 +59,9 @@ class _DashboardPageState extends State<DashboardPage> {
   }
 
   void _onAddTapped() {
-    DbHelper.addChecklist().then((id) {});
+    DbHelper.addChecklist().then((id) {
+      checklistProvider.updateSelectedChecklist(id, silent: true);
+    });
+    Navigator.of(context).pushNamed(DetailChecklistPage.routeName);
   }
 }

lib/pages/detail_checklist_page.dart

@@ -1,10 +1,56 @@
+import 'package:briessenchecker/models/checklist.dart';
+import 'package:briessenchecker/services/checklist_provider.dart';
+import 'package:briessenchecker/services/dbhelper.dart';
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 
-class DetailChecklistPage extends StatelessWidget {
+class DetailChecklistPage extends StatefulWidget {
   const DetailChecklistPage({super.key});
   static const routeName = '/detail';
+
+  @override
+  State<DetailChecklistPage> createState() => _DetailChecklistPageState();
+}
+
+class _DetailChecklistPageState extends State<DetailChecklistPage> {
+  late final ChecklistProvider checklistProvider;
+  late Future<Checklist> checklistFuture;
+
+  @override
+  void initState() {
+    super.initState();
+    checklistProvider = Provider.of<ChecklistProvider>(context, listen: false);
+    checklistFuture =
+        DbHelper.getChecklistById(checklistProvider.selectedChecklistId!);
+  }
+
+  @override
+  void dispose() {
+    super.dispose();
+    checklistProvider.updateSelectedChecklist(null, silent: true);
+  }
+
   @override
   Widget build(BuildContext context) {
-    return const Placeholder();
+    return Scaffold(
+      body: FutureBuilder(
+        future: checklistFuture,
+        builder: _futureBuilder,
+      ),
+    );
+  }
+
+  Widget _futureBuilder(
+      BuildContext context, AsyncSnapshot<Checklist> snapshot) {
+    if (snapshot.hasData) {
+      return Column(
+        children: [
+          Text(snapshot.data!.title),
+          Text(snapshot.data!.description),
+        ],
+      );
+    } else {
+      return const CircularProgressIndicator();
+    }
   }
 }

lib/services/checklist_provider.dart

@@ -0,0 +1,12 @@
+import 'package:flutter/material.dart';
+
+class ChecklistProvider extends ChangeNotifier {
+  int? _selectedChecklistId;
+
+  updateSelectedChecklist(int? checklistId, {bool silent = false}) {
+    _selectedChecklistId = checklistId;
+    if (!silent) notifyListeners();
+  }
+
+  int? get selectedChecklistId => _selectedChecklistId;
+}

lib/services/dbhelper.dart

@@ -34,6 +34,10 @@ class DbHelper {
     return 0;
   }
 
+  static Future<Checklist> getChecklistById(int id) async {
+    return ed.checklists.first;
+  }
+
   static Stream<AuthState> get authChangeEventStream =>
       _client.auth.onAuthStateChange;
 }