Implementation of a button that shows the loading state of an async function passed in param

AsyncButton.swift

//
//  AsyncButton.swift
//  WeaMap
//
//  Created by msilini on 24/02/2024.
//

import SwiftUI

struct AsyncButton<Label: View>: View {
    
    var action: () async -> Void
    var actionOptions = Set(ActionOption.allCases)
    @ViewBuilder var label: () -> Label

    @State private var isDisabled = false
    @State private var showProgressView = false

    var body: some View {
        Button(
            action: {
                if actionOptions.contains(.disableButton) {
                    isDisabled = true
                }
                Task {
                    if actionOptions.contains(.showProgressView) {
                        showProgressView = true
                    }
                    await action()
                    isDisabled = false
                    showProgressView = false
                }
            },
            label: {
                ZStack {
                    label().opacity(showProgressView ? 0 : 1)
                    if showProgressView {
                        ProgressView()
                    }
                }
            }
        )
        .disabled(isDisabled)
    }
}

extension AsyncButton {
    enum ActionOption: CaseIterable {
        case disableButton
        case showProgressView
    }
}

#Preview {
    AsyncButton(action: {
        try? await Task.sleep(nanoseconds: 4_000_000_000)
    }, label: {
        Text("Async")
    })
}