Initial commit

lib/providers/shell_backdrop_provider.dart

@@ -0,0 +1,47 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+@immutable
+class ShellBackdropState {
+  final String primaryImageUrl;
+  final List<String> fallbackImageUrls;
+  final Color accentColor;
+
+  const ShellBackdropState({
+    required this.primaryImageUrl,
+    this.fallbackImageUrls = const <String>[],
+    required this.accentColor,
+  });
+}
+
+class ShellBackdropNotifier extends Notifier<ShellBackdropState?> {
+  @override
+  ShellBackdropState? build() => null;
+
+  void show(ShellBackdropState backdrop) {
+    state = backdrop;
+  }
+
+  void clear() {
+    state = null;
+  }
+}
+
+final shellBackdropProvider =
+    NotifierProvider<ShellBackdropNotifier, ShellBackdropState?>(
+      ShellBackdropNotifier.new,
+    );
+
+
+class ShellLocationNotifier extends Notifier<String> {
+  @override
+  String build() => '/';
+
+  void set(String loc) {
+    if (state != loc) state = loc;
+  }
+}
+
+final shellLocationProvider = NotifierProvider<ShellLocationNotifier, String>(
+  ShellLocationNotifier.new,
+);