thesis_shop/lib/stores/product_selection_store.dart

import 'package:flutter/material.dart';
import 'package:thesis_shop/models/product.dart';

class ProductSelectionStore extends InheritedWidget {
  const ProductSelectionStore({
    Key? key,
    required this.products,
    required this.productAmounts,
    required this.increaseAmount,
    required this.decreaseAmount,
    required Widget child,
  }) : super(key: key, child: child);

  final List<Product> products;
  final Map<ProductTitle, int> productAmounts;

  final Function(Product) increaseAmount;
  final Function(Product) decreaseAmount;

  static ProductSelectionStore of(BuildContext context) {
    final ProductSelectionStore? result =
        context.dependOnInheritedWidgetOfExactType<ProductSelectionStore>();
    assert(result != null, 'No ProductSelectionStore found in context');
    return result!;
  }

  @override
  bool updateShouldNotify(ProductSelectionStore oldWidget) {
    return productAmounts != oldWidget.productAmounts;
  }
}