✨ Delete tasks

lib/core/models/task.dart

@@ -116,6 +116,20 @@ class Task {
         return Task.fromIssue(issue, slug);
       });
 
+  /// Deletes the issue from the remote repository.
+  Future<void> deleteRemote() async {
+    if (_issueNumber == null) {
+      Logger.logWarning(
+        "Cannot delete issue $_issueNumber, it does not exist",
+        _classId,
+      );
+      return;
+    }
+    Logger.logInfo("Deleting issue $_issueNumber", _classId);
+    await (await GithubModel.github).issues.deleteIssue(_slug, _issueNumber);
+    Logger.logInfo("Successfully deleted issue $_issueNumber", _classId);
+  }
+
   /// Creates a copy of the current instance.
   Task copy() => Task(
     title: title,

lib/core/task_handler.dart

@@ -98,8 +98,7 @@ class TaskHandler extends ChangeNotifier {
     return task;
   }
 
-  /// Updates an existing task in the list of tasks. Notifies listeners
-  /// about the change.
+  /// Updates an existing task in the list of tasks. Notifies listeners about the change.
   /// Does not save the task to the remote repository!
   void updateLocalTask(final Task task) {
     final int index = _tasks.indexWhere(
@@ -116,6 +115,21 @@ class TaskHandler extends ChangeNotifier {
     }
   }
 
+  /// Deletes a task from the list of tasks. Notifies listeners about the change.
+  /// Also deletes the task from the remote repository.
+  /// If the task does not exist in the remote repository, it will be removed from the local list.
+  Future<bool> deleteTask(final Task task) async {
+    try {
+      await task.deleteRemote();
+      _tasks.removeWhere((final t) => t.issueNumber == task.issueNumber);
+      notifyListeners();
+      return true;
+    } on Exception catch (e) {
+      Logger.logError("Failed to delete task", _classId, e);
+    }
+    return false;
+  }
+
   Future<List<Task>> _fetchIssuesForRepository(
     final RepositoryDetails repo,
   ) async => (await GithubModel.github).issues

lib/core/utils/snack_bar.dart

@@ -0,0 +1,14 @@
+import "package:flutter/material.dart";
+
+/// Utility class for showing Snack bars safely.
+class SnackBarUtils {
+  /// Shows a SnackBar with the given [message].
+  static void show({
+    required final BuildContext context,
+    required final String message,
+  }) {
+    ScaffoldMessenger.of(context)
+      ..hideCurrentSnackBar()
+      ..showSnackBar(SnackBar(content: Text(message)));
+  }
+}

lib/ui/_widgets/app_bar.dart

@@ -7,10 +7,17 @@ import "package:gitdone/ui/_widgets/app_title.dart";
 /// A normal app bar that is used in most of the views.
 class NormalAppBar extends StatelessWidget implements PreferredSizeWidget {
   /// Creates a normal app bar with an optional back button.
-  const NormalAppBar({super.key, this.backVisible = true});
+  const NormalAppBar({
+    super.key,
+    this.backVisible = true,
+    this.menuItems = const [],
+  });
 
   /// Whether the back button should be visible.
-  final dynamic backVisible;
+  final bool backVisible;
+
+  /// The actions to be displayed in the app bar om PopupMenuButton.
+  final List<MenuItemButton> menuItems;
 
   @override
   Widget build(final BuildContext context) => AppBar(
@@ -26,7 +33,25 @@ class NormalAppBar extends StatelessWidget implements PreferredSizeWidget {
             onPressed: Navigation.navigateBack,
           )
         : const SizedBox(width: 48),
-    actions: const [SizedBox(width: 48)],
+    actions: [
+      if (menuItems.isNotEmpty) _buildMenu() else const SizedBox(width: 48),
+    ],
+  );
+
+  Widget _buildMenu() => MenuAnchor(
+    builder: (final context, final controller, final child) => IconButton(
+      onPressed: () {
+        if (controller.isOpen) {
+          controller.close();
+        } else {
+          controller.open();
+        }
+      },
+      icon: const Icon(Icons.more_vert),
+      tooltip: "Show menu",
+    ),
+    alignmentOffset: const Offset(0, -4), // First item exactly below app bar
+    menuChildren: menuItems,
   );
 
   @override

lib/ui/_widgets/confirm_dialog.dart

@@ -0,0 +1,73 @@
+import "package:flutter/material.dart";
+import "package:gitdone/core/utils/navigation.dart";
+
+/// A dialog that asks the user to confirm an action.
+class ConfirmDialog extends StatelessWidget {
+  /// Creates a [ConfirmDialog] widget with the given parameters.
+  const ConfirmDialog({
+    required final Widget title,
+    required final Widget content,
+    required final String confirmText,
+    required final VoidCallback onConfirm,
+    required final String cancelText,
+    final VoidCallback? onCancel,
+    super.key,
+  }) : _title = title,
+       _content = content,
+       _confirmText = confirmText,
+       _cancelText = cancelText,
+       _onConfirm = onConfirm,
+       _onCancel = onCancel;
+
+  final Widget _title;
+  final Widget _content;
+  final String _confirmText;
+  final String _cancelText;
+  final VoidCallback _onConfirm;
+  final VoidCallback? _onCancel;
+
+  @override
+  Widget build(final BuildContext context) => AlertDialog(
+    title: _title,
+    content: _content,
+    actions: <Widget>[
+      TextButton(
+        onPressed: () {
+          Navigation.navigateBack();
+          _onConfirm();
+        },
+        child: Text(_confirmText),
+      ),
+      TextButton(
+        onPressed: () {
+          Navigation.navigateBack();
+          if (_onCancel != null) _onCancel();
+        },
+        child: Text(_cancelText),
+      ),
+    ],
+  );
+
+  /// Shows the ConfirmDialog as a dialog.
+  static Future<void> show(
+    final BuildContext context, {
+    required final Widget title,
+    required final Widget content,
+    required final String confirmText,
+    required final VoidCallback onConfirm,
+    final String cancelText = "Cancel",
+    final VoidCallback? onCancel,
+    final bool barrierDismissible = true,
+  }) => showDialog<void>(
+    context: context,
+    barrierDismissible: barrierDismissible,
+    builder: (final context) => ConfirmDialog(
+      title: title,
+      content: content,
+      confirmText: confirmText,
+      cancelText: cancelText,
+      onConfirm: onConfirm,
+      onCancel: onCancel,
+    ),
+  );
+}

lib/ui/settings/widgets/repository_selector/repository_selector_view.dart

@@ -1,5 +1,6 @@
 import "package:flutter/material.dart";
 import "package:gitdone/core/models/repository_details.dart";
+import "package:gitdone/core/utils/snack_bar.dart";
 import "package:gitdone/ui/settings/widgets/repository_selector/repository_selector_view_model.dart";
 import "package:provider/provider.dart";
 
@@ -46,9 +47,9 @@ class _RepositorySelectorState extends State<RepositorySelector> {
                 model
                   ..selectRepository(repo)
                   ..saveSelectedRepository();
-                ScaffoldMessenger.of(context).hideCurrentSnackBar();
-                ScaffoldMessenger.of(context).showSnackBar(
-                  SnackBar(content: Text("Selected repository: ${repo?.name}")),
+                SnackBarUtils.show(
+                  context: context,
+                  message: "Selected repository: ${repo?.name}",
                 );
               },
             ),