Add initial FocusModeProvider

lib/riverpod_controllers/focus_mode.dart

@@ -0,0 +1,36 @@
+import 'dart:async';
+
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'focus_mode.g.dart';
+
+class FocusModeData {
+  final DateTime? disableTime;
+  final bool enabled;
+
+  const FocusModeData(this.enabled, {this.disableTime});
+}
+
+@riverpod
+class FocusMode extends _$FocusMode {
+  Timer? _disableTimer;
+
+  void setMode(FocusModeData newMode) {
+    _disableTimer?.cancel();
+    if (newMode.enabled && newMode.disableTime != null) {
+      _disableTimer =
+          Timer(newMode.disableTime!.difference(DateTime.now()), () {
+        print('disabling mode');
+        state = const FocusModeData(false);
+      });
+    }
+    print('New focus mode: $newMode');
+    state = newMode;
+  }
+
+  @override
+  FocusModeData build() {
+    state = const FocusModeData(false);
+    return state;
+  }
+}

lib/riverpod_controllers/focus_mode.g.dart

@@ -0,0 +1,25 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'focus_mode.dart';
+
+// **************************************************************************
+// RiverpodGenerator
+// **************************************************************************
+
+String _$focusModeHash() => r'7ef6b8dec35f671619459b4af61123f90665e4b0';
+
+/// See also [FocusMode].
+@ProviderFor(FocusMode)
+final focusModeProvider =
+    AutoDisposeNotifierProvider<FocusMode, FocusModeData>.internal(
+  FocusMode.new,
+  name: r'focusModeProvider',
+  debugGetCreateSourceHash:
+      const bool.fromEnvironment('dart.vm.product') ? null : _$focusModeHash,
+  dependencies: null,
+  allTransitiveDependencies: null,
+);
+
+typedef _$FocusMode = AutoDisposeNotifier<FocusModeData>;
+// ignore_for_file: type=lint
+// ignore_for_file: subtype_of_sealed_class, invalid_use_of_internal_member, invalid_use_of_visible_for_testing_member