Improved checking for products in SKHelperStoreView

Sources/SKHelper/Views/SKHelperStoreView.swift

@@ -7,6 +7,7 @@
 
 import SwiftUI
 import StoreKit
+import Combine
 
 /// Uses the StoreKit `StoreView` to create a list of all avaliable products.
 @available(iOS 17.0, macOS 14.6, *)
@@ -27,6 +28,9 @@ public struct SKHelperStoreView<Content: View>: View {
     /// True if the store has products.
     @State private var hasProducts = false
 
+    /// Used to cancel the refresh products task.
+    @State private var refreshProductsTask: (any Cancellable)?
+
     /// A closure which is called to display product details.
     private var productDetails: ProductDetailsClosure?
 
@@ -35,7 +39,10 @@ public struct SKHelperStoreView<Content: View>: View {
 
     /// Provides a collection of `Product` to display in the StoreView.
     private var products: [Product] { productIds == nil ? store.allProducts : store.products(from: productIds!) }
-
+
+    /// Used to check mutliple times for product availability.
+    private let refreshProducts = Timer.publish(every: 1, on: .main, in: .common)
+
     /// Creates an `SKHelperStoreView` showing all available products. When you instantiate this view provide a closure that may be
     /// called to display product information. This information will be displayed when the user taps on the product's image.
     ///
@@ -77,7 +84,7 @@ public struct SKHelperStoreView<Content: View>: View {
     public init(productIds: [ProductId]) where Content == EmptyView {
         self.productIds = productIds
     }
-
+    
     /// Creates an `SKHelperStoreView` showing all available products.
     /// Default product information will be displayed when the user taps on the product's image.
     ///
@@ -110,7 +117,7 @@ public struct SKHelperStoreView<Content: View>: View {
                 if let productDetails { SKHelperProductView(selectedProductId: $selectedProductId, showProductInfoSheet: $productSelected, productDetails: productDetails) }
                 else { SKHelperProductView(selectedProductId: $selectedProductId, showProductInfoSheet: $productSelected) }
             }
-            .onChange(of: store.products) { hasProducts = store.hasProducts }
+
         } else {
 
             VStack {
@@ -119,6 +126,11 @@ public struct SKHelperStoreView<Content: View>: View {
                 ProgressView()
             }
             .padding()
+            .task { refreshProductsTask = refreshProducts.connect() }
+            .onReceive(refreshProducts, perform: { _ in
+                hasProducts = store.hasProducts
+                if hasProducts, let refreshProductsTask { refreshProductsTask.cancel() }
+            })
         }
     }
 }