added location overview screen

lib/main.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 
 import 'app_theme.dart';
 import 'model/repositories/local_repository.dart';
+import 'pages/locations_overview_page.dart';
 import 'pages/task_edit_page.dart';
 import 'pages/task_overview_page.dart';
 import 'service/controller_scope.dart';
@@ -39,6 +40,7 @@ class MainApp extends StatelessWidget {
       routes: {
         TaskOverviewPage.routeName: (context) => TaskOverviewPage(),
         TaskEditPage.routeName: (context) => TaskEditPage(),
+        LocationsOverviewPage.routeName: (context) => LocationsOverviewPage(),
       },
       initialRoute: TaskOverviewPage.routeName,
     );

lib/pages/locations_overview_page.dart

@@ -0,0 +1,74 @@
+import 'package:flutter/material.dart';
+
+import '../model/extensions/controller_context.dart';
+import '../model/location.dart';
+import '../service/controllers/location_controller.dart';
+import '../widgets/dialogs/create_location_dialog.dart';
+
+class LocationsOverviewPage extends StatefulWidget {
+  static const routeName = '/locations';
+  const LocationsOverviewPage({super.key});
+
+  @override
+  State<LocationsOverviewPage> createState() => _LocationsOverviewPageState();
+}
+
+class _LocationsOverviewPageState extends State<LocationsOverviewPage> {
+  List<Location> locations = [];
+  @override
+  Widget build(BuildContext context) {
+    locations = context.controller<LocationController>().locations;
+
+    return Scaffold(
+      appBar: AppBar(title: Text('Manage Locations')),
+      body: Padding(
+        padding: EdgeInsetsGeometry.symmetric(
+          horizontal: MediaQuery.of(context).size.width * 0.05,
+        ),
+        child: ListView.builder(
+          itemBuilder: listViewBuilder,
+          itemCount: context.controller<LocationController>().locations.length,
+        ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: onAddLocationButtonPressed,
+        child: Icon(Icons.add),
+      ),
+    );
+  }
+
+  Widget listViewBuilder(BuildContext context, int index) {
+    final location = locations.elementAt(index);
+    final String subtitle = location.address.isEmpty
+        ? location.coordinates.toString()
+        : location.address;
+
+    return ListTile(
+      title: Text(location.name),
+      subtitle: Text(subtitle),
+      onTap: () => onEditLocationButtonPressed(location),
+    );
+  }
+
+  void onAddLocationButtonPressed() async {
+    final result = await showDialog<Location?>(
+      context: context,
+      builder: (context) => CreateLocationDialog(),
+      barrierDismissible: false,
+    );
+    if (mounted && result != null) {
+      context.controller<LocationController>().addLocation(result);
+    }
+  }
+
+  void onEditLocationButtonPressed(Location location) async {
+    final result = await showDialog<Location?>(
+      context: context,
+      builder: (context) => CreateLocationDialog(initialLocation: location),
+      barrierDismissible: false,
+    );
+    if (mounted && result != null) {
+      context.controller<LocationController>().updateLocation(location, result);
+    }
+  }
+}

lib/pages/task_overview_page.dart

@@ -6,6 +6,7 @@ import '../model/task.dart';
 import '../service/controllers/task_controller.dart';
 import '../service/tools.dart';
 import '../widgets/task_dismissible.dart';
+import 'locations_overview_page.dart';
 import 'task_edit_page.dart';
 
 class TaskOverviewPage extends StatefulWidget {
@@ -22,7 +23,20 @@ class _TaskOverviewPageState extends State<TaskOverviewPage> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(title: Text('Hallo Yannick')),
+      appBar: AppBar(
+        title: Text('Hallo Yannick'),
+        actions: [
+          PopupMenuButton(
+            itemBuilder: (_) => [
+              PopupMenuItem(
+                onTap: onLocationsButtonTapped,
+                child: Text('Locations'),
+              ),
+            ],
+            icon: Icon(Icons.more_vert),
+          ),
+        ],
+      ),
       body: Padding(
         padding: EdgeInsetsGeometry.symmetric(
           horizontal: MediaQuery.of(context).size.width * 0.05,
@@ -84,10 +98,13 @@ class _TaskOverviewPageState extends State<TaskOverviewPage> {
         await Navigator.of(context).pushNamed(TaskEditPage.routeName)
             as CreateTaskRequest?;
 
-    if (result != null && context.mounted) {
+    if (result != null && mounted) {
       context.controller<TaskController>().saveTask(
         result.toTask(id: generateId()),
       );
     }
   }
+
+  void onLocationsButtonTapped() =>
+      Navigator.of(context).pushNamed(LocationsOverviewPage.routeName);
 }

lib/widgets/dialogs/create_location_dialog.dart

@@ -0,0 +1,93 @@
+import 'package:flutter/material.dart';
+
+import '../../app_theme.dart';
+import '../../model/latlng.dart';
+import '../../model/location.dart';
+import '../../service/validators.dart';
+
+class CreateLocationDialog extends StatefulWidget {
+  const CreateLocationDialog({super.key, this.initialLocation});
+  final Location? initialLocation;
+
+  @override
+  State<CreateLocationDialog> createState() => _CreateLocationDialogState();
+}
+
+class _CreateLocationDialogState extends State<CreateLocationDialog> {
+  final nameController = TextEditingController();
+  final addressController = TextEditingController();
+  final coordinatesController = TextEditingController();
+  final formKey = GlobalKey<FormState>(debugLabel: 'Create Location Form');
+
+  @override
+  void initState() {
+    if (widget.initialLocation != null) {
+      nameController.text = widget.initialLocation!.name;
+      addressController.text = widget.initialLocation!.address;
+      coordinatesController.text = widget.initialLocation!.coordinates
+          .toString();
+    }
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      actions: [
+        TextButton(onPressed: onCancelPressed, child: Text('Cancel')),
+        TextButton(onPressed: onSavePressed, child: Text('Save')),
+      ],
+      title: Text('Create Location'),
+      content: Form(
+        key: formKey,
+        child: Column(
+          spacing: AppTheme.formColumnSpacing,
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            TextFormField(
+              autofocus: true,
+              textInputAction: TextInputAction.next,
+              controller: nameController,
+              keyboardType: TextInputType.text,
+              decoration: InputDecoration(labelText: 'Name'),
+              validator: notEmptyValidator,
+            ),
+            TextFormField(
+              textInputAction: TextInputAction.next,
+              controller: addressController,
+              keyboardType: TextInputType.streetAddress,
+              decoration: InputDecoration(labelText: 'Address (optional)'),
+            ),
+            TextFormField(
+              textInputAction: TextInputAction.done,
+              controller: coordinatesController,
+              onFieldSubmitted: (_) => onSavePressed(),
+              keyboardType: TextInputType.numberWithOptions(),
+              decoration: InputDecoration(
+                labelText: 'Coordinates',
+                hint: Text('25.5892, 50.5051662'),
+              ),
+              validator: (value) {
+                return notEmptyValidator(value) ?? coordinatesValidator(value);
+              },
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  void onCancelPressed() => Navigator.of(context).pop();
+
+  void onSavePressed() {
+    if (formKey.currentState!.validate()) {
+      Navigator.of(context).pop(
+        Location(
+          name: nameController.text,
+          coordinates: LatLng.fromString(coordinatesController.text),
+          address: addressController.text,
+        ),
+      );
+    }
+  }
+}