Initial commit

lib/providers/presets_provider.dart

@@ -0,0 +1,57 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:uuid/uuid.dart';
+import '../models/color_preset.dart';
+import '../models/busylight_color.dart';
+
+const _kPresetsKey = 'busylight_color_presets';
+const _uuid = Uuid();
+
+class PresetsNotifier extends StateNotifier<List<ColorPreset>> {
+  PresetsNotifier() : super([]) {
+    _load();
+  }
+
+  Future<void> _load() async {
+    final prefs = await SharedPreferences.getInstance();
+    final raw = prefs.getString(_kPresetsKey);
+    if (raw != null) {
+      try {
+        state = ColorPreset.listFromJson(raw);
+      } catch (_) {
+        state = [];
+      }
+    }
+  }
+
+  Future<void> _save() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString(_kPresetsKey, ColorPreset.listToJson(state));
+  }
+
+  Future<void> add(String name, BusylightColor color) async {
+    final preset = ColorPreset(
+      id:    _uuid.v4(),
+      name:  name.trim(),
+      color: color,
+    );
+    state = [...state, preset];
+    await _save();
+  }
+
+  Future<void> update(String id, String name, BusylightColor color) async {
+    state = state.map((p) => p.id == id
+        ? ColorPreset(id: id, name: name.trim(), color: color)
+        : p).toList();
+    await _save();
+  }
+
+  Future<void> remove(String id) async {
+    state = state.where((p) => p.id != id).toList();
+    await _save();
+  }
+}
+
+final presetsProvider = StateNotifierProvider<PresetsNotifier, List<ColorPreset>>(
+  (_) => PresetsNotifier(),
+);