Displaying and Logging Persistence and App Store Errors - swiftui

Question

I am trying to figure out how to display errors such as those found in the App Store Store class and Persistence.swift file in a single reporting module. Some of my errors within views use an environment object to tie the error production to the error reporting, but this isn’t feasible with errors in different classes.
So any pointers on handling these types of errors would be much appreciated.
Below is an example of my process to report an error within a view
// the save button has been pressed
struct saveButton: View {
#Environment(\.managedObjectContext) var viewContext
#EnvironmentObject var errorHandling: ErrorHandling
var body: some View {
// prepping data for save to core data
do {
try viewContext.save()
} catch {
// report: Unable to Save Transaction
self.errorHandling.handle(error: AppError.saveTransactionError)
}
The App Store purchase method (below) may produce two errors that I would like to display with my app. This is the type of logic that I need help display the error within a view
#MainActor
func purchase() {
Task.init {
guard let product = products.first else {
return
}
guard AppStore.canMakePayments else {
return
}
do {
let result = try await product.purchase()
switch result {
case .success(let verification):
switch verification {
case .verified(let transaction):
await transaction.finish()
// save to user defaults
self.purchasedIds = transaction.productID
break
case .unverified:
// throw PurchaseError.failed
// FIX: report error (Unable to purchase verification failed)
break
}
break
case .userCancelled:
break
// asked to buy (setting on phone prevents purchases)
case .pending:
break
default:
break
}
}
catch {
print(error.localizedDescription)
// FIX: report error (Unable to Complete Purchase)
}
}
}
enum AppError: LocalizedError {
case storePurchaseError
case storeVerificationError
var errorDescription: String? {
switch self {
case .storePurchaseError:
return NSLocalizedString("Store Purchase Error", comment: "")
case .storeVerificationError:
return NSLocalizedString("Store Verification Error", comment: "")
}
}
}
Below is some code I have been using to display an alert
struct ErrorAlert: Identifiable {
var id = UUID()
var message: String
var dismissAction: (() -> Void)?
}
class ErrorHandling: ObservableObject {
#Published var currentAlert: ErrorAlert?
func handle(error: Error) {
currentAlert = ErrorAlert(message: error.localizedDescription)
}
}
struct HandleErrorsByShowingAlertViewModifier: ViewModifier {
#StateObject var errorHandling = ErrorHandling()
func body(content: Content) -> some View {
content
.environmentObject(errorHandling)
.background(
EmptyView()
.alert(item: $errorHandling.currentAlert) { currentAlert in
Alert(
title: Text("Error"),
message: Text(currentAlert.message),
dismissButton: .default(Text("Ok")) {
currentAlert.dismissAction?()
}
)
}
)
}
}
extension View {
func withErrorHandling() -> some View {
modifier(HandleErrorsByShowingAlertViewModifier())
}
}